Airplanes can be just as responsive when flown without ailerons as with ailerons and as mentioned dehedral is the key. An airplane without ailerons cannot be controlled at all with a flat wing however the more you increase the dihedral the more responsive the airplane becomes right up to the point of pilot induced ossilation.

An airplane with ailerons is exactly the opposite reduce the dihedral to increase control response and if excessive dihedral is used the ailerons become almost worthless.

Folks who add ailerons to two control airplanes without reducing the dihedral will find the ailerons to be poor responding likely less than when you use just rudder on the same airplane and of course if you convert to just rudder from an airplane designed with ailerons you will also find a poor responding airplane unless you incresed the dihedral.


John