A power winch or an automobile may be used to give the glider enough speed to get into the air, or a plane can tow the glider until an altitude is reached.

PWM mode was analyzed, and a kind of variable-resistance timing Winch being of simple structure and large power supply was put forward by using wire-wound motor and series resistance timing principle.

The capstan power is interlocked with the power of the No. 4 hold cargo winch.