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Swan M1

Early 1920s

This is one of two models made by Hobran engineering for Swan.

The boiler is 2 1/2" diameter x 3 1/4" long and is made of copper. It has a safety valve, whistle, steam regulator and a try-cock for water level determination. It is fired by a three wick meths burner.

Steam is fed from the regulator to the top of the port face of the oscillating cylinder. The brass cylinder is 5/8" bore x 3/4" stroke. Unusually, the piston is hollow. The engine frame is cast alloy. The crankshaft has a disk crank at one end and a 1 5/8" diameter cast alloy flywheel at the other. The flywheel incorporates a 11/32" diameter pulley.

Exhaust steam is fed to the base of the chimney, which is square section with a printed brick effect finish.

As acquired, there were a few minor problems. The safety valve was seized closed, which I have now freed. The whistle was missing it's top half. I have made a replacement for this. The exhaust pipe was missing, for which I have made a replacement. Strangely, there are two holes in the chimney base; one for the exhaust pipe but the other has no obvious purpose. It might be a manufacturing defect but other similar examples have been seen.

Paintwork looks newer than the presumed date of manufacture and has probably been re-painted. It was obviously done with a brush. I'm not sure if this would have been so originally.

Make Swan
Model M1
Made Early 1920s?
Description Stationary
Cylinders 1
Cylinder Type single acting
Bore mm 16
Stroke mm 19
Valve Type Oscillating Cylinder
Boiler Type Horizontal
Boiler Diam mm 64
Boiler length/height mm 82
Fuel Meths
Mechanical Condition Good
Cosmetic Condition Fair
Paintwork Re-painted?
Purchased 12 August 2019
Purchase cost 300
Additional spend