This invention performs all the necessary functions common to the internal combustion piston engine, but its inherent design eliminates the main drawbacks associated with a reciprocating piston engine. For instance, the main moving parts rotate, which maintains less stress on internal parts and less energy required to stop and start a piston moving on a linear path. Also the torque developed during the power stroke of this invention is greater because the force on the momentum arm remains perpendicular for the duration of the power stroke and the length of the momentum remains at its maximum for the duration of the power stroke.

Check out US patent #7,866,297