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A leading edge cuff is a fixed aerodynamic wing device employed on fixed-wing aircraft to improve the stall and spin characteristics. Cuffs may be either factory-designed or an after-market add-on modification.〔Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 144. Aviation Supplies & Academics, 1997. ISBN 1-56027-287-2〕 A leading edge cuff is a wing leading edge modification, usually a lightly drooped outboard leading-edge extension. In most cases of outboard leading edge modification, the wing cuff starts about 50–70% half-span and spans the outer leading edge of the wing.〔Location referred to half-span : Beech C23 0.54, Piper PA-28 0.55, Yankee AA-1 0.57, Cirrus SR20 0.61, Lancair 300 0.66, Questair Venture 0.70, Cessna 172 0.71 - according to SAE TP 2000-01-1691, page 14〕 The main goal is to produce a more gradual and gentler stall onset, without any spin departure tendency, particularly where the original wing has a sharp/asymmetric stall behaviour 〔 with a passive, non-moving, low-cost device that would have a minimal impact on performance. A further benefit is to lowering stall speed, with lower approach speeds and shorter landing distances. They may also, depending on cuff location, improve aileron control at low speed. ==Terminology== "Leading edge cuffs" were called "droop concept" or "drooped leading edge (DLE)", or "modified outboard leading edge" in technical reports on stall/spin resistance.〔Stough, DiCarlo ''Spin Resistance Development for Small Airplanes - A Retrospective'', SAE TP 2000-01-1691 or "Nasa Stall Spin Paper from 1970s, or ().〕 In these reports and others NASA reports on the same object,〔Nasa TP 2011 (Yankee AA-1), Nasa TP 2772 (Cessna 210)〕 "leading edge cuff" expression was not used. Other authors use simply "cuff" or "wing cuff".〔Burt Rutan, ''Canard Pusher n°19'' (1979), "Wing cuff improves VariEze stalls" or more recent ''Wing Cuff Design for Cessna CJ1'' ()〕 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「leading edge cuff」の詳細全文を読む スポンサード リンク
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