Now throw this into the mix. It appears that surfaces are decieving until calculated. This is on a 2 meter Extra Fun. Total aileron area is just a hair under one square foot.........each. Elevators are roughly 5/8 of a sq. ft. each and rudder is 3/4 sq. ft. So if going by area alone it would be ailerons, rudder, elevators, in order of torque required. Then as someone pointed out, shape or chord length. These particular ailerons and elevators have a 5-1/2 inch chord at the widest point, also the counter balance on the elevators is 7-1/2 at its widest point. Rudder is 8-1/2. Considering there are two each, ail and elv. compared to one rudder, I will stick with most force required for rudder with all else equal. Joe