Originally Posted by
MechEngr
I think of increased lift as due to the huge increase in diameter and not the small change to a more forward or higher location.
Understood. But the more forward nacelle during high angles of attack is a longer lever arm. Additionally the higher up on the pylon the nacelle is mounted also contributes a longer lever arm pitch up moment at high aoa. Again it's the the lift from air impinging on the nacelle as well as the lift from the nacelle.