Double Diagonal Steam Engine built from castings.

The model is based on a twin–cylinder diagonal engine built by Lang Bridge Ironworks of Accrington in 1903 for textile printing machinery driving, from Bollington Printworks, Cheshire.

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A built up crank from silver steel and mild steel webs was silver soldered together. The main shaft was then cut away and the keyway milled.

 

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Phosphor bronze bearings are held in place by the top bearing housings.

 

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The keyway was milled into the shaft and planed through the flywheel just a few thou at each pass of the Myford carriage.

 

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The gunmetal crosshead trunk guide casting being machined with the help of a fixed steady.

 

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Two cylinder assemblies – one left hand one right. All from gunmetal castings and stainless screws.  The cylinder cladding was thin brass sheet attached with brass round head screws.

 

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Cylinder showing steam inlet to the steam chest.

 

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Cylinder showing unusual position of steam exhaust connection. This is the reason why the cylinder bore has a liner. An annular ring is turned into the inner bore before the liner is inserted.

 

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