Originally Posted by
417mack
P factor is A result or an increased angle of attack thus increased pitch on the downward blade when at high angle of attack and high power setting. One side of the prop has more bite than the other.
Are you saying that the air is faster on the left side(assuming clockwise rotation pilots view) causes some bernoullli effect of some sort.
Sorry to take so long to get back to this, It's been a very busy summer. Yes. Exactly.
The differential thrust on a propeller at high aircraft AOA can be computed and verified. There is more thrust happening on the right side of the plane. Every multi-engine pilot learns, sees and doesn't question this in their critical engine training. They DON'T attribute the yawing in this situation to the slipstream spiral. That extra thrust has to do something, it just doesn't disappear.
The next answer usually given is that the thrust off the right propeller blade is what is pushing the nose of the plane to the left. BUT that now violates the laws of physics! The thrust applied at the 90 degree point of the blade, due to gyroscopic precession the FORCE from that thrust reacts through the propeller at the 180 degree point; It causes the nose to pitch up, not yaw left.
Thanks for asking