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