A cylindrical drive shaft has forward and rearward ends. A fixed cylindrical housing receives the drive shaft, the housing having forward and rearward ends. An axial flux permanent magnet motor encompasses the drive shaft within the housing. The axial flux permanent magnet motor has a radially exterior cylinder fixedly secured to the housing and a radially interior cylinder secured to the drive shaft for rotation therewith. Each axial flux permanent magnet motor has windings coupled to the exterior cylinder. Each axial flux permanent magnet motor has a permanent magnet fixedly coupled to the interior cylinder. Electrical lines have lower ends coupled to the windings and upper ends adapted to be coupled to a source of potential for energizing the axial flux permanent magnet motors.