page_title: Jet aircraft
hierarchical_section_title: Jet aircraft
caption_attribution_description: English: A U.S. Air Force F-35A Lightning II Joint Strike Fighter from the 58th Fighter Squadron, 33rd Fighter Wing, Eglin AFB, Fla. performs an aerial refueling mission with a KC-135 Stratotanker from the 336th Air Refueling Squadron from March ARB, Calif., May 14th, 2013 off the coast of Northwest Florida. The 33rd Fighter Wing is a joint graduate flying and maintenance training wing that trains Air Force, Marine, Navy and international partner operators and maintainers of the F-35 Lightning II.
context_page_description: A jet aircraft is an aircraft propelled by jet engines.
  Whereas the engines in propeller-powered aircraft generally achieve their maximum efficiency at much lower speeds and altitudes, jet engines and aircraft achieve maximum efficiency at speeds close to or even well above the speed of sound. Jet aircraft generally cruise at faster than about Mach 0.8 at altitudes around 10,000–15,000 metres or more.
  Frank Whittle, an English inventor and RAF officer, developed the concept of the jet engine in 1928, and Hans von Ohain in Germany developed the concept independently in the early 1930s. He wrote in February 1936 to Ernst Heinkel, who led the construction of the world's first turbojet aircraft and jet plane Heinkel He 178.
context_section_description: A jet aircraft (or simply jet) is an aircraft (nearly always a fixed-wing aircraft) propelled by jet engines.
  Whereas the engines in propeller-powered aircraft generally achieve their maximum efficiency at much lower speeds and altitudes, jet engines and aircraft achieve maximum efficiency at speeds close to or even well above the speed of sound. Jet aircraft generally cruise at faster than about Mach 0.8 (609 mph, 981 km/h or 273 m/s) at altitudes around 10,000–15,000 metres (33,000–49,000 ft) or more.
  Frank Whittle, an English inventor and RAF officer, developed the concept of the jet engine in 1928, and Hans von Ohain in Germany developed the concept independently in the early 1930s. He wrote in February 1936 to Ernst Heinkel, who led the construction of the world's first turbojet aircraft and jet plane Heinkel He 178.
caption: USAF Lockheed Martin F-35 Lightning II
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