The horizontal boiler is 50mm diameter x 157mm. It is heated by a solid fuel tablet burner. It has a safety valve, overflow plug and a chimney carrying the engine exhaust. The engine bracket is mounted on top of the boiler.
Steam is fed directly to the back of the port face. The engine is a single acting oscillating cylinder; 8mm bore x 20mm stroke. The crankshaft has a simple crank at one end and a 52mm flywheel at the other. Exhaust is fed back into an empty void in the boiler shell and out through the chimney.