14.4. Always disconnect the battery when working on the helicopter

[Warning]Warning

ALWAYS DISCONNECT THE BATTERY WHEN POSSIBLE IF WORKING ON THE HELICOPTER. IF YOU MUST WORK ON A LIVE HELI, THEN DISCONNECT AT LEAST ONE OF THE MOTOR LEADS SO THE MAIN ROTOR/TAIL ROTOR WILL NOT SPIN UP AND MAIM YOU.

If the main rotor or tail rotor spins up and maims or kills you, this will probably slow down your helicopter learning process, so please try to avoid this.

See also: