Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

This is from the show, a Canfield? Or Camfield? I didn't get the correct spelling I don't think.  (Can someone tell me? 😀)

Anyhow,  what is interesting about this engine is that it has 2 exhaust ports. One is at bottom dead center. The idea is to have the engine run cooler.

Hi Chris, Canfield is correct. It's the black engine with the vertical brass water tank.

The Canfield and the Gade both have an exhaust port at each end of the stroke. The Canfield ports are on the top of the cylinder and the air cooled Gade are on the side. I believe the thinking was simply if the remaining hot gas under pressure at the bottom of the stroke has a place to escape, it will aid in cooling as much less of it (hot gases) will need to be pushed back to the top dead center to be forced out the exhaust valve at the head. Hope this helps.

Gil