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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Firth Helicopter ： ウィキペディア英語版 Firth Helicopter The Firth Helicopter was a British helicopter of the early 1950s. Designed to exploit new outrigger rotor technology, the helicopter was abandoned during construction. ==Design and development== Based on the designs of American engineer Fred Landgraf who established the Landgraf Helicopter Corporation in the early years of the Second World War, The Firth Helicopter was more of a "proof-of-concept" aircraft than a true prototype. Firth Helicopters Ltd. had obtained rights to the Landgraf patents regarding a concept which involved twin outrigger pylons carrying three-bladed rotors fitted with ailerons to change direction. The design team of Heenan, Winn and Steele, led by Major J.N. Dundas Heenan who had been previously involved in a similarly unorthodox 1948 aircraft project, the Planet Satellite, utilized the fuselage of the second Satellite prototype, registered ''G-ALXP'' in 1951. The small, streamlined Satellite monocoque fuselage consisted of panels of an extremely light magnesium-zirconium alloy. The original contours tapered to a butterfly tail that was eliminated and replaced by a single fin to be topped by a tailplane in a "T tail" design; surprisingly, the Satellite fuselage was integrated seamlessly into the new helicopter planform.〔Middleton 1983, p. 531.〕 The Satellite's four-seat configuration allowed for a larger helicopter than the Landgraf H-2/H-3 series (the H-4 would have been a 5/8 passenger helicopter) which had been the basis of the first Landgraf concept helicopters. The twin non-articulated type rotors were powered by two 145 hp de Havilland Gipsy Majors. 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「Firth Helicopter」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.