The boiler is a fairly standard Mamod one. It has a chrome plated cover extending right over the top of the boiler, as on the MEC1. The boiler is 1 3/4" dia x 4 1/2" long. It has a standard Mamod 1/4" safety valve, a water level sight glass and a whistle, but no steam dome.
The engine is a single cylinder, single acting oscillating cylinder type with a reversing lever which operates by shifting the trunnion. The crank shaft and flywheel are almost standard Mamod except that the shaft diameter is Meccano standard 5/32". The crankshaft was fitted with a Meccano standard gear wheel and chain sprocket, but they are missing from this example. There is a pulley turned into the boss of the flywheel.
The whole thing is riveted together, which would make restoration a bind. Fortunately, it is in reasonably good condition so I've left it as is.
| Make | Model | Made | Description | Cylinders | Cylinder Type |
|---|---|---|---|---|---|
| Mamod | SP3 | 1979-84 | Engine for Meccano | 1 | Single acting reversible |
| Bore mm | Stroke mm | Valve Type | Boiler Type | Fuel | Mechanical Condition |
|---|---|---|---|---|---|
| 8 | 20 | Oscillating Cylinder (reversible) | Horizontal | Solid fuel tablets | Good |
| Cosmetic Condition | Paintwork | Packaging | Purchased | Purchase cost | Additional cost |
|---|---|---|---|---|---|
| Fair | Original but damaged | 27/8/2012 | £30 |