A system includes an engine having a crankshaft and an electric motor having a shaft, the shaft including a first end and a second end. The system further includes a power source in electrical communication with the electric motor, the power source configured to provide electrical power to the electric motor, a reduction drive coupled to the crankshaft and to the first end of the shaft of the electric motor, and a fan coupled to the second end of the shaft of the electric motor, wherein rotation of the shaft of the electric motor drives rotation of the fan.