Aerofoils.. Suck or Blow..?
I seem to remember that for PPL training, the aerfoil section was considered to be mostly supported by the vacuum above the wing.
However the effect of batting so many air molecules downwards by the underside of the wing must also account for lots of lift.
Has there ever been any wind-tunnel tests done to determine which supplies the most upward lift..?
My own tests of blowing over a piece of paper seemed to show no difference between the suction side or the blown side.