CafeenMan,

I understand what you mean. If it came to building a nonsymmetric airframe to compensate for the nonsymmetric effects of the prop, I suspect that you could only have 'neutral' behavior for a narrow range of operating conditions ( airspeed, engine speed, etc ). If you wanted to get that theoretically perfect neutral behavior from a prop plane, you might have to do something more fundamental, like counter-rotating props, or a twin with different directions of rotation.

banktoturn