Troy Engine was absorbed by Skinner in the 1950's. The Troy plant still stands, and the foundry is an open, abandoned structure. The machine shop portion of the plant produces cast iron fire hydrants and underground iron-body valves for fire mains. O'Brien Machinery, a used engine/generator wheeler-dealer outfit, bought Troy Engine in the 50's. O'Brien wanted to liquidate everything, so sold the Troy engine line and production tooling to LeGrand Skinner.
Troy built fine engines, and they were all enclosed, self-oiling, and ranged in sizes from about 3" bore on up to maybe 12" or 15" bore.
The engine shown is a late style engine. We knew of its existence when Hanford Mills was shopping for a steam engine. Since it was too late a design, and way more engine than we needed, we passed on it. The truth is that it is a GOOD engine for some real work. It would do fine in a mill where waste wood fuel was available. Unfortunately, its size and design are working against it being saved. People saving steam engines tend to want historic engines, open frame machines like Corliss engines. The recent exception was the saving of the Skinner Unaflow steam engine from the mill in Gardner, MA, which Rick Rowlands headed up. This particular engine is a bit large for steaming using boilers such as one finds on a traction engine or similar historic/hobby sized boilers. The fact it has a one piece frame and is totally enclosed/self oiling would make it an easy engine to build a foundation for and erect.
In terms of efficiency, it is probably not the most efficient steam engine for this HP rating. It was built to act as an "expander", probably exhausting against some low back pressure (such as wood dry kilns). Between waste wood fuel and a use for the exhaust steam, this gave nearly free energy in the form of expanding the steam from boiler pressure down to exhaust pressure thru the engine.
I wish I knew somewhere that engine could find a home. Unfortunately, in today;s world, anyone with a boiler plant large enough to steam it is probably using the steam for process and can't fit an engine (and tramp oil in the waste steam) into the process steam loop. Unfortunately also, a waste wood fired boiler large enough to make steam for that engine would probably get on the radar as a source of stack emissions.