RE: Biplane Roll Rates - two ailerons vs four?
I have both the GP Super Stearman and the GP PT-17 Stearman which is the military trainer version of the Super Stearman. The PT-17 only has lower wing ailerons and yes there is a roll difference. All you will need to do is use more down elevator when inverted in the roll. The amount of rudder will stay the same