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Because advanced computers were available to control the flight of an aircraft that was designed for stealth but aerodynamically unstable such as the Have Blue, for the first time designers realized that it might be possible to make an aircraft that was virtually invisible to radar. [36] [37] Lockheed soon developed the Have Blue into F-117. [36]
213th Flight Unit: THJY Russia State Airline CHD 223rd Flight Unit: CHKALOVSK-AVIA Russia State Airline TTF 224th Flight Unit: CARGO UNIT Russia State Airline TWF 247 Jet Ltd: CLOUD RUNNER United Kingdom SEC 3D Aviation: SECUREX United States Q5 MLA 40-Mile Air: MILE-AIR United States QRT 4D Air: QUARTET Thailand Defunct PIU 43 Air School ...
A jet aircraft (or simply jet) is an aircraft (nearly always a fixed-wing aircraft) propelled by one or more jet engines. Whereas the engines in propeller-powered aircraft generally achieve their maximum efficiency at much lower speeds and altitudes, jet engines achieve maximum efficiency at speeds close to or even well above the speed of sound .
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China's much-anticipated J-35A stealth aircraft, centrepiece of this week's Zhuhai air show, has been more than a decade in the making, but experts say little is known about its capabilities.
For commercial jet aircraft the jet noise has reduced from the turbojet through bypass engines to turbofans as a result of a progressive reduction in propelling jet velocities. For example, the JT8D, a bypass engine, has a jet velocity of 400 m/s (1,450 ft/s) whereas the JT9D, a turbofan, has jet velocities of 300 m/s (885 ft/s) (cold) and 400 ...