he 280造句

• The He 280 was left engineless, and was eventually abandoned.
• The HeS 8 was intended to power the Heinkel He 280 twin-engine HeS 30.
• Meanwhile, the first He 280 prototype was re-equipped with pulsejets and towed aloft to test them.
• The "'Heinkel He 280 "'was the first turbojet-powered fighter aircraft in the world.
• On 22 December, a mock dogfight was staged for RLM officials in which the He 280 was matched against an Fw 190.
• Heinkel was ordered to abandon the He 280 and focus attention on bomber development and construction, something he remained bitter about until his death.
• The Jumo 004-powered Me 262 appeared to have most of the qualities of the He 280, but was better matched to its engine.
• Work progressed slowly, and by the time the first He 280 prototype was ready in September 1940 the engine was nowhere near ready for flight.
• Early models were powered by compressed air and the first aircraft to be fitted with such a system was the Heinkel He 280 prototype fighter in 1941.
• The second He 280 prototype was re-engined with Junkers Jumo 004s while the next three airframes were earmarked for the BMW motor, which was ultimately unavailable.
• Heinkel was the first to develop a jet fighter to prototype stage, the Heinkel He 280, the first Heinkel design to use and fly with retractable tricycle gear.
• Undeterred, Heinkel decided to embark on the development of a twin-engine jet fighter, the He 280 as a private venture using what had been learned from the He 178 prototype.
• The engines were later fitted and the He 280 first took to the air on 2 April 1941, although the cowlings had to be left off as the engine proved to leak fuel.
• At the time the Swedish press describes the incident as a " first ", the 13 January 1942 ejection by German Helmut Schenk from a Heinkel He 280 being little known at this point.
• One of the He 280 test pilots, Helmut Schenk, became the first person to escape from a stricken aircraft with an ejector seat on January 13 1942 after his control surfaces iced up and became inoperable.
• *1942  Heinkel test pilot Helmut Schenk becomes the first person to escape from a stricken aircraft with an ejection seat after the control surfaces of the first prototype Heinkel He 280 V1, DL + AS, ice up and become inoperable.
• Heinkel's He 280, the firm's only twin-jet aircraft design to fly never reached production, however, since the RLM wanted Heinkel to concentrate on bomber production and instead promoted the development of the rival Messerschmitt Me 262.
• The pioneering airworthy turbojet aircraft, the He 178, was a German taildragger-geared design that first flew in August 1939 . It was used as the basis of the later tricycle landing geared He 280, a design passed over for the Me 262.
• The Heinkel firm's previous experience with designing flightworthy, retractable tricycle undercarriage-equipped airframes extended as far back as late 1939 with the Heinkel He 280 jet fighter prototype, and further strengthened with the unexpectedly successful Heinkel He 219A night fighter, which also used a tricycle undercarriage.
• One benefit of the He 280 which did impress the political leadership was the fact that the jet engines could burn kerosene, which requires much less expense and refining than the high-octane fuel used by piston-engine aircraft . However, government funding was lacking at the critical stage of initial development.