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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 Berliner Helicopter ： ウィキペディア英語版 Berliner Helicopter The Berliner Helicopters were a series of experimental helicopters built by Henry Berliner between 1922 and 1925. The helicopters had only limited controllability but were the most significant step forward in helicopter design in the USA until the production of the Vought-Sikorsky VS-300 helicopter in 1940.〔 The 1922 flights of the Berliner and the de Bothezat H1 were the first by manned helicopters.〔(''The Helicopter: A Hundred Years of Hovering'' ). Wired.com. Accessed 2010-11-07.〕〔(Aerofiles, "D" )〕〔''Proceedings'', Volume 48, Issues 7-12. United States Naval Institute.〕 ==Development== Emile Berliner, an inventor famous for his invention of the flat gramaphone record, had experimented with intermeshing helicopters as early as 1907.〔 The initial design was underpowered and called for a lighter engine. Berliner developed a 36 hp five cylinder rotary engine with the Adams-Farwell Company from Dubuque, Iowa, producing the first rotary engine used for aircraft. Berliner later spun off the Gyro Motor Company from this work.〔 A test rig was flown in 1908, followed by two other upgrades before Berliner focused on his other businesses.〔 In 1919, Emile Berliner's son, Henry Berliner, left the Army Air Service as an aerial photographer to work with his father on helicopter designs.〔(Berliner Helicopter, Model 1924 ). National Air and Space Museum. Accessed 2010-11-07.〕 By 1922 Henry founded the Berliner Aircraft Company with a focus on conventional aircraft. The Berliner Helicopter was successfully demonstrated throughout the 1920s but interest was lost due to its limited controllability and engine-out abilities compared to the autogyro and conventional aircraft.〔"(Why don't we fly straight up? )" ''Popular Science'', February 1928, p.43.〕 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「Berliner 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.