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Aircraft classified as first generation jet fighters〔(Aerospaceweb.org | Ask Us - Fighter Generations )〕 are the first attempts at creation of military aircraft using jet engines. A few were developed during the closing days of World War II and saw very limited combat operations. The generation can be split into two broad groups, slower jets with straight wings common to World War II era fighters such as the Me 262 and the Meteor, and mature swept-wing first-generation fighters such as the F-86 used in the Korean War which are controllable at near sonic, and controllable in a dive at supersonic speeds. The "generations" of fighter aircraft are a relatively modern concept based on claims for "Fifth Generation". They are rough categories based on similar designs and do not correspond to a rigid definition. While most of the first-generation fighters were developed during World War II and the postwar period, both straight-winged attack low-subsonic jets such as the A-10 Warthog and swept-wing high-subsonic speed jets such as the A-7 Corsair II continued to be designed mostly in trainer and attack fighter roles with secondary air-air combat capabilities. == World War II era == The initial attempts were straight-winged subsonic planes based heavily on the design concepts that had worked well in piston-powered aircraft. Some of these fighters were tested using piston engines to evaluate the airframes before the jets to power them were available or reliable enough to sustain flight.〔Radinger, Will and Schick Walter. Me262 (in German). Berlin: Avantic Verlag GmbH, 1996. ISBN 3-925505-21-0, page 23〕 The first operational turbojet aircraft, the He 178, was a German design that first flew in 1939. It was used as the basis of the later He 280, a design passed over for the Me 262. A similar British design, the Gloster E.28/39 had provisions for some armament, but the guns were not fitted on either prototype. The Bell P-59 Airacomet was the first American jet fighter to be put into service. It was never used in combat, as was mainly useful as an experimental fighter as its performance was inferior to the piston-engined North American P-51 Mustang which could reach higher top speeds and had a much greater range. Japan had some experimental models, such as the Nakajima J9Y ''Kikka'', but none saw operational use.〔# Francillon, Réne J. Japanese Aircraft of the Pacific War. London: Putnam & Company Ltd., 1970 (2nd edition 1979). ISBN 0-370-30251-6.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「First-generation jet fighter」の詳細全文を読む スポンサード リンク
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