One embodiment of an apparatus for wheel slipstream energy recovery in wheeled vehicles comprising a plurality of wheel spokes (21) of a wheel attached to a rotatable motoring shaft (22) which in turn is connected to a motor (26) and a generating propeller (23) attached to a rotatable generating shaft (24) which in turn is connected to a generator (25). Operation of the motor (26) results in the motoring propeller (21) to rotate and generate an accelerating slipstream towards the generating propeller (23) which results in the generator (25) rotating to convert recovered rotational energy into other forms of useable energy. The motor (26) may be an electric motor or an internal combustion engine. The generator (25) output is available for charging batteries or powering electrical loads in either electric or conventional vehicles. Both motor (26) and generator (25) are motoring and generating simultaneously.