link here Gas Engine PM Oct 1946
The engine in the article is actually called a 10cc racing engine. It was a model boat class at the time. When compared to the Elmer Wall Water Witch it is the same engine. The magazine plans in the article are accurate and the engine can be built using those drawings. You will probably need a magnifying glass to read all of the fractional dimensions. Also the crank case, cylinder head, ignition timer and flywheel are all castings. The carburetor was a separate set of castings with the aluminum float bowl and a bronze carburetor body. Many Water Witch engines have been built and they run well. Coles Power models sold a set of castings for this engine. I don't know the status of Coles at this time.I am interested in building the engine detailed in Popular Mechanics Magazine 0ct and Nov 1946.
Has anyone out there built one and heard of anyone building one?
You input would be appreciated.
Thanks
Mike
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