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The Mamod SP3 Meccano engine was always the odd man out in the SP series. It's style never fitted in with the rest of the range. This is my attempt to correct that error.

The SP3A is a combination of parts from an original Mamod SP3 and an SP4. The chassis and engine are from the SP3 and the boiler/firebox/chimney are from the SP4 (both slightly modified so they could be bolted together).

I originally used parts from a MEC1 instead of an SP3. However, it wasn't quite right so I later acquired a spare SP3 and used the parts from that.

The video below shows my reasons for making this as it is.

Make REW
Model SP3A
Made 2015
Description Meccano engine
Cylinders 1
Cylinder Type single acting reversible
Piston Diam mm 8
Stroke mm 20
Valve Type Oscillating cylinder
Boiler Type Horizontal
Fuel Tablets
Mechanical Condition Good
Cosmetic Condition Good
Paintwork Repainted
Purchased 2015
Purchase cost
Additional cost