Abstract: A rotating unit having a rotating wheel on the internal circumference of which a gear is formed, a drive motor to the rotating shaft of which a pinion gear is fixed, an intermediate gear in mesh with the gear of the rotating wheel and the pinion gear of the drive motor, and characterized in that the reduction gear mechanism is simplified by causing the drive motor to drive the rotating wheel via the intermediate gear with the consequence that the volume and weight of the rotating unit is reduced, and that the rotating shafts of the rotating wheel and the drive motor are adapted to be in alignment with each other.

Abstract: A model racing car having front wheels, rear wheels, drive motors and a radio control receiver and of the front drive type that is adapted to control a large steering angle of the front wheels by means of the output of the radio control receiver, wherein a plurality of the drive motors with reduction gear devices, mounted on each of the front wheels for driving the front wheels independently are caused to rotate in an interlocking fashion as a block by the output of the radio control receiver, whereby the steering angle of the front wheels is controlled.