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FFA N-20 : ウィキペディア英語版
EFW N-20

The EFW N-20 Aiguillon (in English: "Stinger") was Switzerland's first indigenous jet fighter aircraft. The Swiss Federal Aircraft Factory developed a design for a four-engined swept winged fighter following the end of the Second World War. During the test programme an unpowered glider was built and flown. A turbojet powered test aircraft, known as the Arbalète ("Crossbow"), also flew.
The N-20 design was not produced. Both the single Aiguillon and Arbalète airframes survive and are on public display at the Flieger-Flab-Museum, Dübendorf; the glider test aircraft was destroyed in an accident.
==Design and development==
The aircraft was to be powered by four turbofan engines buried in the wings, with the bypass air feeding cold-air pipes each side of the engines, being routed through a combustion chamber where additional fuel could be burned as a form of reheat, or deflected though large slots on the upper and lower wings to act as aerodynamic flaps or thrust reversers. Two engines could be shut down in flight to increase range. It was planned that the N-20 would carry its armament in a detachable weapons bay, capable of carrying large loads of cannons, rockets or bombs.〔Haller 1962, p.203.〕
It was initially planned that the aircraft's engines would be designed and built by the Swiss company Sulzer. The initial engine choice was a small turbojet, the Sulzer D45, with a thrust of , which was abandoned in 1947. Only two prototype D45 engines were built in 1948. The first engine, D45.01 was used in a test rig between 1950 and 1951 and the second engine, D45.04 (of limited airworthiness) was used until 1955 in a test rig. The D45.04 is also part of the Dübendorf museum N-20 display.
The Armstrong Siddeley Mamba turboprop was then chosen as the basis for the N-20's engines, with the propeller reduction gear replaced by a low pressure compressor.〔Haller 1962, p.204.〕 This powerplant was named Swiss Mamba SM-1, the conversion was carried out in 1948 by EFW, with only six engines built (four fitted to the N-20 with two spares). One of the spare engines is today part of the Swiss Museum of Transport, at the Flieger-Flab-Museum Dübendorf.

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「EFW N-20」の詳細全文を読む



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