sorry little hawk;the turn left in an a/c is to do with the engin torque.in a single engin a/c the engin will fight a right role but will speed up the roll rate to the left,makes changing direction faster,usefull in a dogfight.does apply to multies also[but to a lesser extent]one noteable exception was the p38 with counter rotating engins it rolled just as fast left or right.
and i have seen bats turn right on leaving their laire as well as left.