I built a Royal Corsair back in 1985. 8 bellcranks in the wing! silk and dope outer panels. royal cockpit kit. no one made rotating retracts back then so no retracts[]. this was the 1/2A size! OS.10fsr for power. 5 ch.,5 servos. 42oz. my dad made me promise not to fly it. it now resides in his war memorabilia room, he is a WW II Marine.