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Glenn Pfortmiller    Great Bend, Ks                  5/13/2009

Atkinson Differential

This is based on Vince Gingery's book "Building the Atkinson Differential" and was built in 2008. Patience is required to get the linkages just right and building a wood mock up is very helpful. The payback is a nice starting and sweet running motor. 1 5/16" bore with 1/2" compression stroke and 1" power stroke. O-rings on the pistons and running on propane.  The flywheel is machined out of a 10 pound gym weight.

A video of this engine and my  Cycle engine can be seen at:




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