ORIGINAL: les40
Sorry. I didn't realize that the bank angle of an aerobatic turn had to be between 60 and 90 deg. That said, I see now that top rudder will have to be applied to maintain altitude. Is this maneuver typically done at a 90 deg bank?
Not always true.
If you only bank about 70 and maintain a good speed you will not need rudder. Of course this will depend on your plane. Find what is comfortable with your particular model