Assembly and Rigging During inspection of the flight control system of an airplane equipped with differential-type aileron control, side-to-side movement of the control stick will cause a. each aileron to have a greater up travel (from the streamlined position) than down travel. b. each aileron to have greater down travel (from the streamlined position) than up travel. c. the left aileron to move through a greater number of degrees (from full up to full down) than the right aileron.