I've just finished this little engine which was a nice break from the more involved Heinrici and Wall engines. It is based on an old advert that I found on the net plus after asking on ME forum I also got a couple of photos of an old engine.
I designed it in metric but kept it to approx the same size with 16mm x 16mm bore and stroke replacing the original 5/8 x 5/8. Also the first time I had done an engine with a double acting piston valve only having done single acting engines with them before, also first time with rod crosshead guides.
I'm quite pleased with how it turned out and considering the small flywheel and short conrod runs reasonably slowly. A video of it running, the table it is sitting on makes it sound a bit loud but soon quietens when I pick it up, it stopped because I put my finger over one of the exhausts. Also looks like a bit too much endplay in the crankshaft so will move the flywheel along a bit.
