Unless I am mistaken the type of air craft should not effect the pushback. It should turn left or right providing you have hit the keystrokes in time. Like suggested here the keys should be pressed in order without any pause inbetween.Hold the shift key than press p,1 or p,2. The plane should start turning after it backs up roughly a planes length. Give it a little time

Curios though I have never tried to push back a helo I wonder what would happen. I would try it except I removed my helos.