In surveying all kinds of steam engines on the net for my own information I came across this one. It has me flumoxed. Looks like a normal slide valve engine but the exhaust seems to come directly out of the cylinder, not the steam chest. Can't figure out how this one works. Anybody know this engine? Also has something weird going on with the bottom of the cylinder. What is the purpose of the long tube? Must be a linkage from the piston rod to the crankshaft.