I'm always puzzled why the change of momentum regarding the airflow under the wing is never considered as part of the lift.
As the wing moves forward at a high angle of attack, the airflow hitting the underside of the wing, which was sitting there quite happily, all of a sudden is forced down, effectively the wing pushing it out of the way. This imparts a vertical force on the wing ( to every action there is an equal an opposite reaction) and hence lift.
This is a completely separate effect to lift produced by lower pressure on the upper surface of the wing.
Why is this lift from a change of momentum of the airflow, never considered, I would imagine this is the predominant lift force when flying inverted for a standard aerofoil.
Christ, you must be joking! That's the single most argued issue in the history of aviation. Google "Newton versus Bernoulli" and you'll get millions of hits!
Or are you trolling??????????
Pitts2112