05-10-2012, 08:55 PM
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Approved Member
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Join Date: Jan 2012
Posts: 214
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From http://en.wikipedia.org/wiki/Stall_%28flight%29
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Dynamic stall is a non-linear unsteady aerodynamic effect that occurs when airfoils rapidly change the angle of attack. The rapid change can cause a strong vortex to be shed from the leading edge of the aerofoil, and travel backwards above the wing. The vortex, containing high-velocity airflows, briefly increases the lift produced by the wing. As soon as it passes behind the trailing edge, however, the lift reduces dramatically, and the wing is in normal stall
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