There was research done, using an A5(A3J)Vigilante with many small perforations on the upper surface of the wing to draw air in using engine driven pump(s). These tests proved the concept - lowered drag and increased lift across a wide range of speed/aoa conditions. I have searched the web and...
GregLocock was right on to raise the issue of the torque applied to the AC by the engine/prop. It is apparant that the question, as originally posed is a complex issue. I was always impressed by the fact that experienced pilots, at take-off positioned their aircraft at an angle to the runway (by...