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Leading edge slots

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skier

Well-Known Member
Joined
Mar 5, 2008
Messages
1,079
Location
CT
Does anyone know how/why slots increase the lift of a wing/airfoil? I realize that it allows the wing to stall at a higher angle of attack, but what is happening to the flow that allows this to occur? I have read the section in Abbott and Von Doenhoff about slots, but that didn't give much information.

As a related note, how much do they increase drag for a given Cl (such as in cruise)?
 
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