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Aériane Swift
The Aériane Swift〔in upper case, "SWIFT" is also an acronym: (''Swept Wing with Inboard Flap Trim'')〕 is a lightweight (48kg) foot-launched 3-axis sailplane whose rigid wings have a span of 40 feet. It is a type of flying wing, having winglets on the wingtips but no significant fuselage aft of the pilot.
Although designed in California, Swift aircraft are now manufactured by Aériane, a European firm based in Gembloux, Belgium.〔http://www.aeriane.com〕 Aériane first manufactured the Swift under licence, but the firm is now the sole manufacturer.
==Design & development==
The Swift was originally conceived as a rigid hang glider with sailplane-like performance. It was designed in a collaboration between Bright Star Gliders and Ilan Kroo, a professor at Stanford University, along with a group of Stanford graduate students. The Swift's configuration as a foot-launched sailplane with rigid wings is claimed to be unique.
The swept wing has control surfaces along the entire trailing edge: flaps occupy the inner 42%, and elevons take up 58% of the outer span. The Swift faces similar design issues as a true flying wing, namely the need for directional stability in yaw. This matter is addressed by winglets and the models with an enclosed cockpit thereby have conventional fuselage stabilising surfaces that contribute to yaw stability. The winglets on the 1990 prototype were fixed surfaces, not rudders, so the pilot effected turns with elevons.〔http://aero.stanford.edu/Reports/SWIFTArticle1991.html〕 The original Swift is now out of production, having been replaced by a refined version called the Swift'Lite. This new model has winglets that, like those on the Rutan Long-EZ, are rudders when used singly, and air-brakes when used together.〔Bertrand, Noel; Rene Coulon; et al: ''World Directory of Leisure Aviation 2003-04'', pages 41 and 52. Pagefast Ltd, Lancaster OK, 2003. ISSN 1368-485X〕 In addition, compared to its predecessor, the Swift'Lite is claimed to be: 20% lighter, with lighter and more responsive controls, a lower stall speed, an improved glide ratio of 27:1, better pilot visibility and comfort, and an easier set-up routine.〔Aériane Swift promotional DVD video〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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