How come airplanes can fly inverted?
If the airfoil is upside-down and so the camber is opposite of what it is in non-inverted flight, doesn’t Bernoulli’s law mandate that the difference in pressures would exert DOWNWARD force? In like manner, Newton’s law would have the air deflected UPWARD. Resultant ‘lift’ force would therefore act in addition to, not opposite the force of gravity. Or would it?