The RK-1A device is ised for the acceleration of elevated, unpowered wheels in vehicles with total weight up to 3,5 t.
The electric motor with a drive plate, equipped with a friction (foot) brake, ia mounted on trolley frame. The engine and the drive plate are partially shielded by a screen cut. During braking, the brake having has the form of double-arm lever, presses the panel covered with friction lining against the drive plate.
The device is controlled by use off the "START" button located on the handle of the device, as well as the rotation direction switch.