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The engine has six double-headed pistons which compress and fire at each end. As one end fires, it compresses the other end. This back and forth movement forces the roller cam to rotate and since the main shaft is keyed to the cam, rotational power is developed. Trunion rollers are housed in the middle of each piston that ride along the cam.
The resulting engine operation has a pure harmonic motion and is so perfectly balanced that almost "zero" vibration is developed. Counterweights, vibration dampeners and flywheels are not needed!
This internal drawing gives an idea of how the piston are positioned...
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