17g Positive Servo- L-700mm for FMS 4 CH Pitts Sport / 7 CH Super P51-D Mustang / 6 CH Giant Focke-Wulf Fw 190A / 6 CH Giant Japanese A6M3 Zero / 6 CH Giant F6F Hellcat / 6 CH Giant P51-D Mustang / 6 CH Giant P-40 Warhawk / 5 CH Giant Spitfire / 5 CH Junk