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The Hiller YROE-1 Rotorcycle was a single seat ultralight helicopter designed in 1953 for a military requirement.〔 A total of 12 were produced for the United States Marine Corps. And in 1954, the Hiller Helicopters was selected by the US Navy's Bureau of Aeronautics to build this design of a one man, foldable, self-rescue and observation helicopter.〔(Hiller Museum: ''Rotocycle'' )〕 It featured a two blade rotor system. Its original empty weight was .〔Apostolo, p. 68〕 ==Development== The helicopter folded up and could be carried on a sled-like carrier by two people or could be air-dropped to pilots trapped behind enemy lines. The Marines did not accept the YROE due to its low performance, vulnerability to small-arms fire and the lack of visual references on the structure. This problem could cause the pilot to experience spatial disorientation at all but very low altitudes.〔(NASM: ''Hiller YROE-1 Rotorcycle'' )〕 The YROE or ROE never saw military service.〔 In 1954 the U.S. Navy Bureau of Aeronautics selected Hiller to build their proposed design of a one-man helicopter. The XROE Rotocycle completed flight testing in mid-1957. It was demonstrated at the Pentagon in Arlington, Virginia for military and other government officials in early April 1958.〔"Rotorcycle on View Here", ''The Washington Post and Times Herald'', Washington, D.C., Tuesday 1 April 1958, Volume 81, Number 117, page A8.〕 Production was by Saunders-Roe who made five for the US Marine Corps and five for Helicop-Air of Paris. A Porsche engine of 62 hp developed for the YROE was trialled by 1961. 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「Hiller YROE」の詳細全文を読む スポンサード リンク
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