FEATURES: Designed specifically for F3C aerobatic competition
          Rectangular heat sink allows engine to be enclosed entirely inside
            cooling shroud
          61-B carburetor with thermal insulator to block heat and a needle
            valve control lever to control mixture from transmitter
          Newly designed piston and crankshaft for reduced vibration and
            improved torque stability over entire RPM range
          Ball bearing supported crankshaft
          One year limited warranty