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powered lift : ウィキペディア英語版 | powered lift
Powered lift or powered-lift refers to a type of aircraft that can take off and land vertically and functions differently from a rotorcraft in horizontal flight. The term is particularly used by the United States Federal Aviation Administration for classification purposes. Powered-lift is one of the seven categories of aircraft designated by the Federal Aviation Administration; the other six being Airplane, Rotorcraft, Glider, Lighter-Than-Air, Powered parachute, and Weight-shift control. The first powered-lift ratings to be issued by the FAA on a civilian pilot certificate were on 21 August 1997, to pilots of Bell Helicopter and Boeing, and of the United States Marine Corps.〔("Osprey Pilots Receive First FAA Powered Lift Ratings" ), www.boeing.com, 21 August 1997. (1999 Archive )〕 ==Convertiplane== (詳細はBell Boeing V-22 Osprey, the rotor swings forward to act as a propeller in forward flight. Some designs have a ducted rotor design, in which the rotor is surrounded by a large ring-shaped duct to reduce tip losses.
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「powered lift」の詳細全文を読む
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