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Ron Colonna         McKeesport, PA    

Four cylinder, four cycle, Spark ignition. 1.032" bore,1.094" stroke. First run; December 1999.Designed and built by Ron Colonna

I built this engine and wrote a construction manual to help others build one of their own. The Offenhauser engines are legendary and this quarter scale model has been well received amongst the model engine building fraternity. The manual contains all machining instructions, drawings, and source lists. No castings are required as everything is machined from the solid.  Ron sells plans for this engine at .



More pictures and videos of running engines can be seen at .


Copyright 2002,  Florida Association of Model Engineers and engine builder as noted above, All rights reserved.