I understand there are many different ways to explain lift on an airfoil, one of which is flow turning, that being due to the coanda effect on the upper surface of the airfoil, it deflects incoming air downwards, resulting in an equal and opposite reaction.
I can understand this on the lower side to a somewhat extent if there is a preexisting angle of attack, but otherwise, i could only see relative pressure on the wing from flow turning acting straight down on the upper surface.
Here is a very crude visual example of my thought process, It's not the prettiest but I hope that someone can understand it and clear up my confusion. I can understand how the rocket produces such thrust, but not a wing.
