The free flight test equipment is a set of equipment for verifying the flight control law of multi-rotor UAVs. It is mainly used in the development phase and factory test phase of multi-rotor UAVs. The equipment includes an inner ring lift system, an outer ring lift system, a mobile car and a wireless control unit.

The free flight test equipment is used in the development stage to debug the pitching, rolling and yaw control laws of the multi-rotor UAV to verify the reliability of the complete power system and software system. The lifting system is divided into an inner ring lifting system and an outer ring lifting system, and the two systems can work independently. The outer ring lifting system is mainly used to raise the UAV platform to avoid the interference of the ground effect on the UAV; the inner ring lifting system is used for the lifting of the universal joint, and the system is used after the UAV is started, releasing the attitude of the UAV.