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An ultralight trike, also known as a flex-wing trike, weight-shift-control aircraft, microlight trike, deltatrike〔(Deltacat ULM AVIATION: deltatrike )〕 or motorized deltaplane,〔(Motorized Delta plane term )〕 is a type of powered hang glider using a high-performance Rogallo wing coupled to a propeller-driven three-wheeled undercarriage. While many powered aircraft have three-wheeled landing gear, the term "trike" refers specifically to the form of aircraft described here. The principles of this page can generally be applied to the single-place ultralight trike and the two-place weight-shift control light-sport aircraft. Flight control in a trike is by weight-shift.〔(Weight-Shift Control Aircraft Flying Handbook )〕 == History == ] (詳細はmicrolights" in Europe and have been extremely popular since the 1980s. The history of the trike is traced back to the invention by Francis Rogallo's flexible wing and subsequent development by the Paresev engineering team's innovations and then others. On 1948, engineer Francis Rogallo invented a self-inflating wing which he patented on March 20, 1951 〔Article: How ''to Fly Without a Plane'' by Robert Zimmerman, aerospace writer. ()〕 as the Flexible wing. It was on October 4, 1957, when the Russian satellite Sputnik shocked the United States and the space race caught the imagination of its government, causing major increases in U.S. government spending on scientific research, education and on the immediate creation of NASA. Rogallo was in position to seize the opportunity and released his patent to the government and with his help at the wind tunnels, NASA began a series of experiments testing Rogallo's wing – which was renamed Para Wing – in order to evaluate it as a recovery system for the Gemini space capsules and recovery of used Saturn rocket stages.〔(SPACEFLIGHT REVOLUTION )〕〔On 1965 Jack Swigert, who would later be one of the Apollo 13 astronauts, softly landed a full-scale Gemini capsule using a Para Wing stiffened with inflatable tubes along the wing's edges〕 F. Rogallo's team adapted and extended the totally flexible principle into semi-rigid variants. This mainly involved stabilizing the leading edges with compressed air beams or rigid structures like aluminum tubes. By 1960 NASA had already made test flights of a powered heavily framed cargo aircraft called the Ryan XV-8 or ''Fleep'' (short for 'Flying Jeep')〔The earliest photographic press release of a Rogallo flexible wing in record dates to August 14, 1961 by 'Aviation Week and Space Technology' magazine.〕 and by March 1962, of a weight-shift experimental glider called Paresev. By 1967 all Para Wing projects were dropped by NASA in favor of using round parachutes without officially considering development of personal ultralight gliders, but the airfoil's simplicity of design and ease of construction, along with its capability of slow flight and its gentle landing characteristics, did not go unnoticed by hang glider enthusiasts. The challenge then, was to modify and fit a Rogallo flexible wing with an appropriate frame to allow it to be used as a hang glider. 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「ultralight trike」の詳細全文を読む スポンサード リンク
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