Bore: 9mm

Stroke: 12mm

Capacity: 3.05cc

Working Pressure: 45psi or 3bar

Length: 78mm or 3.06″ (excluding reversing handle)

Width: 52.5mm or 2.07″ (excluding throttle handle)

Height: 90mm or 3.55″ (excluding lubricator cap)

Weight: 321g or 11.33oz

This engine has been engineered to give a balance between the aesthetic appearance and sound engineering practice. Miniature roller races have been utilised extensively throughout; in total there are twenty used for the crankshaft, valve shaft, reversing gears, big ends and little ends. The result being that the bottom end of the engine requires very little lubrication other than minimal lubrication for the eccentric straps. This lends itself very clean and smooth operation together with low maintenance.

In an effort to simulate materials of the age, the block, steam chest and engine bed have been manufactured from aluminium which is then treated to give a textured finish. The components are subsequently hard anodised to BS5599. Hard anodising has a hardness approximating “sapphire” and is therefore very durable and wear resistant. This combination gives a finish that closely resembles that of cast iron. Pistons and slide valves are manufactured from complimentary materials which offer extremely good sealing characteristics combined with very low friction.

Stainless steel, brass and bronze are used extensively throughout the engine. As a result of this the engine is light weight, compact and powerful, offering the modeller an engine that looks authentic and is highly functional which should give years of untroubled enjoyment.





These two pictures clearly show the simulated wood cladding and brass straps. The brass column tops that double as lubrication points for the piston rods can be seen. Also on view is the reversing shaft that runs the full length of the engine via bearings in the columns.





The two views above show the engine from two different perspectives both looking from the exhaust end, one showing the cladding and reversing shaft and the other showing steam chest and throttle lever detail.





Example of twin cylinder steam engine and Kingdon Boiler in a customers model boat.





Once again the engine can be seen from two different angles, both looking from the inlet end. The reversing and throttle levers can be seen in detail.



This image shows clearly the domed cylinder head bolts, the secondary valve rod bushes, the “T” bar cap to the displacement lubricator and also the makers name plate. In addition the different sizes of the cylinder heads can clearly be seen.




This shows the eccentric straps with their lubrication points. The displacement lubricator can also be seen extending from the bottom of the cylinder block and a side profile of the Maudslay constant mesh reversing mechanism.



This image shows the machined surfaces of the connecting rods complete with bolt heads at the big end. Also the balance webs of the crankshaft. The piston rod lubrication duct can be seen extending from the column supporting the reversing shaft.