My 1/4 scale 1926 RRG Prufling glider has a complete working cockpit control system. If you could find a 1/4 scale sized person to sit in it then they would be able to fly it (if they knew how to pilot and aircraft)! Just disconnect the servos form the joystick and rudder bar. Everything is cable controlled, including the ailerons which make their turns over pulleys and into the wings. A full 'build' is on RCScalebuilder website under 'scale sailplanes' forum.