1926 Fowler DNA steam roller "Dorothy", named after the first owner's wife. A ten ton compound engine, it has been the subject of a thorough overhaul in recent years, including new barrel and tubes, gears and back axle. In good condition, it's a particularly well-sorted machine - free-steaming and easy to drive, we took her over to the Woodhall Spa 1940s weekend a couple of weeks ago which was a very pleasant ten mile run each way. Paintwork is serviceable but needs work in places, the tender needs painting following replacement of the axle (it's currently in red primer).
Rivetted steel boiler with expanded tubes, 200 psi working pressure, feed by injector and mechanical pump with bypass. Compound cylinder block with slide valves actuated by Stephenson's gear, Manzel mechanical lubricator. Water lifter fitted to tender, we've used it for refilling the tender from a water tank carried in the van.
There's a short video of Sam and Tom out on the engine here. Carried away on what was supposed to be a short run out to Blankney (the next village down to us), they eventually trundled home at dusk (with one lamp out and the other perilously low on paraffin...).
Complete with a large, interesting history file, detailing her owners from the beginning, complete with original works picture of the engine.