Originally Posted by
SayAlt
Me too. Used an A36 for it, tho.
The question was posed as "single piston" as opposed to "SE piston", hence the "dangerously under-powered" reply with a

. I know, I know. Too clever by 1/2.

I think there was a single-piston design from John Deere. The problem was that it required a massive flywheel, which made the airplane too heavy to take off.