How does air "pull"?
Dang, every response I have for this would bring admin moderator.
Owing to a reduction in 'pressure' above the airfoil as the airfoil moves through the air (and actually, it's a resultant 'push' that occurs from the air *below* the airfoil, but, it is not simply the 'thrust' or a 'push' developed by the prop against the air that produces the resultant *force* ...)