Peter McQueen’s

An increasingly popular part of the hobby is the rebuilding of old and redundant models. This is one such, a very nice rebuild of a compound mill engine. The original builder of the model is not known but is thought to have been constructed in Scotland in the early 1930s without the use of a milling machine.

Several parts, including the flywheel and most of the steam flanges were missing. Peter decided to completely rebuild the model using as many original parts as possible, including  the wooden base board.

It was originally built with Whitworth threads. Most of these have been replaced with metric and BA threads, partly due to availability and partly because the Whitworth nuts were too large for the scale of the model. Valve rod guides were added, and a boiler feed pump was designed and added driven by an additional eccentric on the main shaft.

Engine as found.