Moonlit Rail ™

100 Inch, Maybe

Reciprocating Beam Steam Museum Non-beam Engine
Looking down onto beam engine, Kew Bridge Steam Museum, England

I am not sure which of the reciprocating-beam engines this is, but it may well be the "100 Inch." Five engines are on display: the 90 and 100 inch engines in one building, and the 1838 Maudslay, Bull, and one other engine in the second building.

Both the 90 inch and Maudslay engines are runnable.

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