|X-15Hypersonic Research
        at the Edge of SpaceChronology | Chronology                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | NASA logoJune 1952
NACA Committee on Aerodynamics recommends increase in
research dealing with flight to Mach 10 and to altitudes from 12
to 50 miles.
         September 1952
Preliminary studies of research on space flight and associated
problems begun. 
         February 1954
NACA Research Airplane panel meeting discusses
need for a new research airplane to study hypersonic and
space flight. 
         July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | June 1952
NACA Committee on Aerodynamics recommends increase in
research dealing with flight to Mach 10 and to altitudes from 12
to 50 miles.
         September 1952
Preliminary studies of research on space flight and associated
problems begun. 
         February 1954
NACA Research Airplane panel meeting discusses
need for a new research airplane to study hypersonic and
space flight. 
         July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | September 1952
Preliminary studies of research on space flight and associated
problems begun. 
         February 1954
NACA Research Airplane panel meeting discusses
need for a new research airplane to study hypersonic and
space flight. 
         July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | February 1954
NACA Research Airplane panel meeting discusses
need for a new research airplane to study hypersonic and
space flight. 
         July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                               | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                               | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                    | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                      | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                               | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                     | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |      | October 24, 1968
Last X-15 flight, 199th mission.
         home |  | home |  | 
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|Chronology                                                      
|                                                                 | June 1952
NACA Committee on Aerodynamics recommends increase in
research dealing with flight to Mach 10 and to altitudes from 12
to 50 miles.
         September 1952
Preliminary studies of research on space flight and associated
problems begun. 
         February 1954
NACA Research Airplane panel meeting discusses
need for a new research airplane to study hypersonic and
space flight. 
         July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | September 1952
Preliminary studies of research on space flight and associated
problems begun. 
         February 1954
NACA Research Airplane panel meeting discusses
need for a new research airplane to study hypersonic and
space flight. 
         July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | February 1954
NACA Research Airplane panel meeting discusses
need for a new research airplane to study hypersonic and
space flight. 
         July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                                                                                               | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                                                                               | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                                                                                                    | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                                                                                      | October 24, 1968
Last X-15 flight, 199th mission.
         home |                                                                                                                                                               | home |                                                                     | 
|                                                                 | September 1952
Preliminary studies of research on space flight and associated
problems begun. 
         February 1954
NACA Research Airplane panel meeting discusses
need for a new research airplane to study hypersonic and
space flight. 
         July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | February 1954
NACA Research Airplane panel meeting discusses
need for a new research airplane to study hypersonic and
space flight. 
         July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                               | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                               |                                                                                                                                                                                                                                                                                                                                                               | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                        |                                                                                                                                                                                                                                                                                                    | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                           |                                                                                                                                                                                                                      | home                                                                |                                                                                                                                                               |     
|                                                                 | February 1954
NACA Research Airplane panel meeting discusses
need for a new research airplane to study hypersonic and
space flight. 
         July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                               | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                               | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                  |                                                                                                                                                                                                                                                                                                    | home                                                                                                                                                          |                                                                                                                                                                                                                      |                                                                    
|                                                                 | July 1954
Proposal for new research airplane presented to the Air Force
and Navy. 
         December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                               | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                               | home                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                    |                                                                                                                                                              
|                                                                 | December 1954
Invitations issued by the Air Force to contractors to participate
in the X-15 design competition. 
         September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                               | home                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                     
|                                                                 | September 1955
North American Aviation, Inc., selected to develop three X-15
research airplanes. 
         February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | home                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                   
|                                                                 | February 1956
Reaction Motors, Inc., awarded development contract for
XLR99 rocket engine, 
         December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | home                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                              
|                                                                 | December 1956
X-15 mock-up completed. 
         September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                              
|                                                                 | September 1957
Design configuration set. Construction starts. 
         October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|                                                                 | October 1958
Factory rollout of No. 1 airplane. 
         June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                 | June 8, 1959
First glide flight, No. 1 airplane. 
         September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|                                                                 | September 17, 1959
First powered flight, No. 2 airplane. 
         March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|                                                                 | March 25, 1960
First NASA flight in an X-15 aircraft. Pilot is Joe Walker.
         November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|                                                                 | November 15, 1960
First flight with XLR99 engine. 
         March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                 | March 7, 1961
First flight to Mach 4. 
         June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|                                                                 | June 23, 1961
First flight to Mach 5. 
         October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                                 | October 11, 1961
First flight above 200,000 ft. 
         November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|                                                                 | November 9, 1961
First flight to Mach 6. 
         December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                 | December 20, 1961
First flight of No. 3 airplane. 
         July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|                                                                 | July 17, 1962
First flight above 300,000 ft. 
         August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|                                                                 | August 22, 1963
Unofficial world altitude record of 354,200 ft. 
         January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                 | January 28, 1964
100th flight in series. 
         October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                 | October 3, 1967
World's absolute speed record for winged aircraft, 4,520 mph
         October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|                                                                 | October 24, 1968
Last X-15 flight, 199th mission.
         home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|                                                                 | home                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        

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