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Hans Berger, a noted Swiss inventor, formed Berger-Helicopter, to develop a series of light helicopters of his own design. The BX-50 of 1961 and the BX-110 of 1974 were built as prototypes, with the BX-110 proving sound enough to earn a certificate of airworthiness from the Swiss Board of Aviation. Besides these two machines, Berger's other inventions were a jet-powered car, and numerous other helicopter designs. Professionally, Berger was the sales representative for Brantly in Switzerland and Liechtenstein. ==Unbuilt Berger helicopter projects== * Berger HB-25 - 4 seat design with turbine power * Berger BX-50 * Berger BX-110 * Berger BX-111 - 2 seat design with Wankel-type engine and coaxial rotors * Berger BX-200 - 2 seat design with turbine power * Berger BX-300 - 3 seat design with stub wings, to be powered by Turboméca turbine 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「Berger-Helicopter」の詳細全文を読む スポンサード リンク
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