The thing is, all aeroplanes are different....dihedral for starters.
I agree though, in simple terms when you roll into a turn you need *more* rudder - reason is that one aileron goes up, reducing AoA on one wing, one goes down increasing it on the other. Net result increase in drag on one wing and a yawing tendancy towards the downward ailerom. When you are IN the turn and ailerons are the same then this situation doesn't exist any more. Of course then you have other factors like outboard wing travelling faster, dihedral trying to level the plane, whatever......
One good exercise is to fly along S&L and rock the wings 30 deg either side and watch the nose. It scribes a circle in the sky. Now do it and apply rudder as you do and watch the nose stay still.....
Last edited by englishal; 15th Nov 2008 at 17:31.