Abstract: A plastic fan configured for attachment to a fan drive in a manner in which cooling air will be promoted to flow from the rear of the fan drive across the rear fins of the fan drive and through the blades of the fan. The flow of air across the rear fins increases heat dissipation from the fan drive. The fan has a plurality of radially extending circumferentially spaced blades secured to an axially extending hub portion. The hub portion is configured to be radially spaced from the fan drive to define an annular passage. Further, the front edge of the hub portion is spaced rearwardly from the forward portion of the rear fins of the fan drive to define a slot for cooling air to flow substantially unrestricted through the annular passage and to the blades of the fan.

Abstract: An accessory drive for rotating a fan used to cool a transversely mounted engine in a vehicle. A declutchable device, such as a viscous fan drive, has one element driven by the engine. The other element is connected to one end of the core of an elongated flexible shaft. The other end of the core is connected to the fan which is mounted in a known manner relative to the radiator of the vehicle to draw cooling air through the radiator and thereby cool the engine. The mounting of the declutchable device ahead of the flexible shaft allows for a reduction in the angular velocity of the core thereby increasing the life of the flexible shaft.