Interesting stuff. Another purpose added to the long list of Model A and Model B engines (cars, farm implements, marine applications, generators, water irrigation pumps, etc.)
I have seen the Funk tractor conversions to 6 and 8 cylinders in the 1950's for the Ford tractors, but never would have believed an upside-down airplane engine. I would like to see how they did the oil sump, and
why invert the engine in the first place? Water cooled too? Seems like they would want to make it light as possible. I wonder if it had a crank in the front? Oh yea, that was the prop. LOL