Abstract: An electrodynamic motor drive system, for generating enhanced rotational output, is comprised of a pair of flywheel mechanisms that are integrally connected to an output shaft. Each flywheel mechanism is energized by its own motor and is operable to temporarily engage a weighted mass that travels a path defined by the housing of the system. A pair of mass accelerators rapidly advances each flywheel mechanism during the transfer of the masses from one flywheel mechanism to the other. A component of the force generated by the continuously rotating masses is transferred through each flywheel mechanism to an output system which, in turn, causes rotation of an output shaft.