The theory was applied by Ackeret (reference2) to thin airfoils moving at supersonic speed. These trailing vortices have the effect of reducing the lift produced by the wing and creating a form of drag called induced drag. Can Thin Airfoil Theory predict drag?Īs you imply in your question, Thin Airfoil Theory does not predict drag, only lift and pitching moment. Thin airfoil theory is a straightforward hypothesis of airfoils that relates angle of attack to lift for an incompressible and inviscid flow past an airfoil.
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