I agree, this is not a compound engine, it is just a dual cylinder engine. Neat though. I made a somewhat similar project when I was ten. My Grandfather gave we a model stationary steam engine. It was originally designed to run on coal but as such never quite raised enough steam to be interesting. My father had created, in his youth, a gas burner for it. This ran on coal gas and looked quite lethal. Not being able to get a supply of coal gas I designed an electric fan driven parafin burner. Actually more like a flame thrower,and quite lethal. You could drive a small generator from the engine. The generator produced just enough to power the fan. Flames would leap from every hole. My Mother screamed with fright while my Father laughed.
My advice to any parent who wants their child to be an Engineer: build them a shed and don't ask too many questions. A few bunt fingers are a small price to pay for the pure joy of making something work.
Biting the hand that feeds IT
