Evening star. [volume] (Washington, D.C.) 1854-1972, 1931-06-28

hydraulic brake, permitting reaings
free from the effect Of SlipStream. After
gliding with the propeller Stoppe the
pilot may start his engine by leans
of gasoline starter operated fro his
seat
At Langley Field, research heaquar-
tiers of the National Advisory Clmit-
tee for Aeronautics, pressures q the
various parts of wings in fligt are
studied by means of scores of p:ssure
tubes let into. the wing surface and
connected with automatic recordtg de-
vices. This arrangement shoS not
only pressure on the wing as aUAole,
but on all parts of the wing, vleher
the pressure be positive or negaive
Freight Plane Built.
The appearance of the new Ffd sin
gle-motored freight plane, whia made
its public debut during the Debit air.
craft show, has been followed an an
nouncemsnt from the America trade
commissioner at Berlin of rw Jun
kers all-metal, low-wing freiat plane
which, except for the differenc in loca-
ton of the wing, is strikingl similar
to the new Ford freighter.
The JunkerS has main hahes for
loading freight in the sides ad top of
the fuselage. 1t Is equipped VIII a 685-
Horsepower, water-cooled engie. 1t Is
provided with tail-wheel, a unusual
feature in land where tail dds have
been the rule. A radio department
and space for baggage and mail are
provided in addition to tn general
freight compartment.
The plane has a wing syn of 95
feet, normal fuel capacity. of 1900
pounds, giving a duration oD1a hours
and range Of about $50 nies. 1t is
estimated that the plane coui fly with
out intermediate stops on ne Berlin
London route, distance CISCO miles,
with a pay load of Alta punds.
Sixteen Thousand Pitts.
The United States now has nearly
5000 licensed airplane piles who are
maintaining active licenses according
to figures of the Aeronauts Branch,
Department of Commerce. There are,
in addition, 14,483 active Sadent per-
mits in existence.
For the use of these 5000 pilots and
student pilots there are 1893 aircraft
for which active licenses sc in exist
ence and the department als6has listed
an additional 2,762 unlicesed air
planes; a total of about 1000 active
aircraft. or about one to sch three
pilots and student pilots.
These figures, however, do ut include
military airplaneS, though tey do in
clude many military pilots who also
hold civil pilot licenses.
The department records show that
there are 1924 active aircraf mechanic
licenses in effect and that 16iparachute
Triggers hold active licenses.
approved type certificates tr 423 diff
ferent types of airplanes. twenty-five
different types Of engines hse been ap-
proved for use in approved type planes
and there have been issud approved
type certificates for 297 propellers.
There are IA foreign enginsswhich have
been approved but for which the De-
partment of Commerce ha not issued
approved type certificates
The Department of Commerce has
given its approval, after rid eXamina-
ton, to "a aeronautical shoots which
give ground or flight training, or both,
and has examined and approved 1913
flying instructors and 90 ground in
structorS. There are 48 aircraft repair
stations which have been Examined and
officially approved for tn repair and
overhauling Of aircraft ami aircraft en-
gines.
Air Cruises Planned.
Washington will witnes something
new in vacation-time avalon this week
when New York Always, affiliated with
the powerful Pan-Ameican Anyways
System, will inaugurate aser!es OF all
expense" cruises between the National
Capital and Atlantic CITY, N. j., the
single ticket including transportation.
hotel, meals and other expenses. In
auguration Of this line which is to
operate on regular schedule, will make
the sixth air transport line operating
out of the National Opital.
A dress rehearsal fight will be
held over the new liAe tomorrow, the
first plane leaving Washington Hoover
Airport at 1880 am and returning at
IL o'clock Tuesday mTning.