An interesting scratch-built twin cylinder hot air engine, the power cylinders working transversely in boxer configuration, driving an auxiliary shaft by bevel and skew gearing which in turn operates the displacer pistons via overhung cranks with ballrace big ends.
The crankshaft turns freely, however the displacer pistons are tight and require adjustment to the skew gearing to engage with the main crank.
Length 13 inches including base
Flywheel 3 1/2 inch diameter
