.20-1/4" main rotor diameter, 21" fuselage length, 9 oz. flying weight. Honey Bee Mark 3 includes a 2-cell 800 mAh LiPoly battery pack and a dedicated LiPoly battery field charger. Ready to fly within minutes of opening the box. Charge the flight pack and you are ready. If you are a beginner, leaving the flybar weights at the outer position will dampen the controls and make the helicopter easier to fly. As you improve, move the weights in for quicker response. The swashplate has a metal ball for reduced wear and precise control. The servos are screwed to the frame for solid response. Main rotor has a fiberglass plate reducing blade coning, which improves the helicopters forward flight. Main and tail rotors are fixed pitch and are controlled by individual motors. The mixing board controls mixing of the main and tail rotors. The board also contains 2 speed controls, a peizo gyro for tail stabilizing and a battery-eliminator-circuit, which supplies power to the receiver and servos. A complete line of spare parts is available from Hobby Lobby. *Note - spare parts for the Honey Bee Mk. 2 and Mk. 3 are the same..