Compound Engine To maximise efficiency on steam locomotives, some were designed to use steam at high pressure in one or more cylinders.
Compound Engine A steam engine in which the exhausted steam is directed into a second set of cylinders.
See "Compound Engine" above.[38] Matchbox tank (UK slang): a type of pannier tank where the tanks are square and do not rest of the locomotive frame. Mating worms (US): Penn Central logo (jargon/slang).[39][40] ...
See "Compound Engine" above. Mogul: locomotive with a 2-6-0 wheel arrangement Multiple unit (UK): A self-propelled rail vehicle which can be joined with multiple compatible others and controlled from a single driving station.
All this kit bashing was a lot of fun, but certainly not required to preserve the history of compounding during the age of steam. Feel free to set your own limits, but do think about having at least one compound engine in your roundhouse.
See also: Drive, Track, Signal, Boiler, Locomotive
 
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