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Wing twist is an aerodynamic feature added to aircraft wings to adjust lift distribution along the wing.. Often, the purpose of lift redistribution is to ensure that the wing tip is the last part of the wing surface to stall, for example when executing a roll or steep climb; it involves twisting the wingtip a small amount downwards in relation to the rest of the wing.
Washout is commonly achieved by designing the wing with a slight twist, reducing the angle of incidence from root to tip, and therefore causing a lower angle of attack at the tips than at the roots. This feature is sometimes referred to as geometrical washout, to distinguish it from aerodynamic washout.
Spoiler controls can be used for roll control (outboard or mid-span spoilers) or descent control (inboard spoilers). Some aircraft use spoilers in combination with or in lieu of ailerons for roll control, primarily to reduce adverse yaw when rudder input is limited by higher speeds.
Wing warping was an early system for lateral (roll) control of a fixed-wing aircraft or kite. The technique, used and patented by the Wright brothers , consisted of a system of pulleys and cables to twist the trailing edges of the wings in opposite directions.
Aircraft have to be carefully shaped to take full advantage of this effect. In addition, the angle of the shock waves varies greatly with speed, making it even more difficult to design a craft that gains significant lift over a wide range of speeds.
Divergence is a phenomenon in which the elastic twist of the wing suddenly becomes theoretically infinite, typically causing the wing to fail. Control reversal is a phenomenon occurring only in wings with ailerons or other control surfaces, in which these control surfaces reverse their usual functionality (e.g., the rolling direction associated ...
New oral history of "Airplane!" traces the making of the beloved parody of 1970s disaster movies. 'Airplane!' creators to tell all about their surprise 1980 hit movie at Dearborn event
The inspiration to the channel wing concept came in 1925 when Custer had observed how the roof of a barn was lifted during a very strong gust of wind. He started investigating the phenomenon and, by 1928, he had developed the first Model of a new airplane wing for which he received a patent in 1929. [ 2 ]