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The Fairey Delta 2 or FD2 (internal designation Type V within Fairey) was a British supersonic research aircraft produced by the Fairey Aviation Company in response to a specification from the Ministry of Supply for investigation into flight and control at transonic and supersonic speeds. The aircraft was the first to exceed 1000 mph, flying faster than the sun moves across the sky, and held the World Air Speed Record for over a year. It was modified as the BAC 221 to test the "ogee delta" wing design which was used on the Concorde SST. ==Design and development== The Delta 2 was a mid-wing tailless delta monoplane, with an oval cross-section fuselage and the engine air intakes blended into the wing roots. The engine was a Rolls-Royce Avon RA.14R with reheat. The Delta 2 had a very long tapering nose which would normally have obscured forward vision during landing, take-off and movement on the ground. But as an innovation to compensate, the nose section and cockpit drooped 10°, in a similar way to that used later on Concorde. The wing had 60 deg. leading edge sweep and was very thin, at only 4% thickness-chord ratio, making it one of the thinnest known at that time. It housed the main undercarriage and fuel tanks. The Delta was the first British aircraft to fly using all-powered controls. The flight control system was hydraulically operated, having dual systems throughout and no mechanical backup. Fairey had recently developed a new high-pressure hydraulic system and this was used in the design. The hydraulics provided no feedback or "feel" to the pilot's controls, so another system providing artificial feel was necessary.〔 Two aircraft were built: Serial numbers ''WG774'' and ''WG777''. The FD2 was used as the basis for Fairey's submissions to the Ministry for advanced all weather interceptor designs leading to the Fairey Delta 3 for the F.155 specification, but it never got past the drawing board stage. 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「Fairey Delta 2」の詳細全文を読む スポンサード リンク
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