Sold March 2022 Back to Archive

4 inch scale "Orcop Yeoman" portable engine - stock code 10269

A finely made example of John Haining's 4 inch scale "Orcop Yeoman" portable engine, serialised in "Model Engineer" magazine in 1993.

Something of an amalgam of nineteenth century design, Haining drew on influences from Tuxford and Savage who both produced small 3 and 4nhp engines to produce a model just under a yard long that can be handled and transported easily.

The engine runs beautifully on air, there's some video of it in the workshop here. Fit and finish of motionwork is excellent, silky smooth in operation - the unusual circular pattern guide bars of a type originally fitted by Savage.

The welded steel boiler has expanded copper tubes, it's had a recent hydraulic test with new certification issued.

scale 4 inch
length/inches 32
width/inches 13
height/inches 24
wheel material steel
axlebox type plain bearing
valve type slide
lubricator type displacement
boiler number TNG2002-15-2
year built 2003
boiler maker non-commercial
CE mark n/a - non-commercial
working pressure/psi 60
boiler type locomotive
boiler material steel
boiler construction welded, expanded copper tubes
hydraulic test valid to 16-Feb-2024
safety valve(s) 1
safety valve type Salter
mechanical pump 1