Originally Posted by Lnewqban

I believe that the wing loading is pretty close to the actual average pressure differential between bottom and top surfaces of the wing needed for sustaining level flight.

The value of the wing loading is actually a little lower, due to the air leaks in the hinge lines and around the tips and edges, all of which increase with high AOAs'.

Example: wind load of 21 ounce/sqft = 0.009 PSI relative to atmospheric pressure

Am I correct?