Abbreviated as the total pitch bar, it is used to control the change of the total pitch of the rotor blade. The total distance joystick is generally arranged on the left side of the driver's seat and rotates around the axis of the support. When the driver lifts the pole with his left hand, the total pitch of the rotor blade is increased by raising the automatic tilter as a whole (that is, the pitch of all blades increases at the same angle at the same time). The pull force of the rotor is increased, and vice versa, the pull force decreases, thus controlling the lift motion of the helicopter. Rotary throttle control mechanism is usually installed on the handle of the total pitch joystick to adjust the size of the engine throttle, so that the output power of the engine can be adapted to the power required by the rotor when the total pitch of the rotor blade changes. Therefore, the joystick is also known as the total distance throttle lever.