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Large pressurised hot air engine - stock code 4152

A large hot air engine, built as a college project, of largely fabricated construction. It turns over freely with excellent compression and runs quietly, typical of the type. It has a fitting to allow the cylinder to be pressurised, after which the thing is next to impossible to turn over by hand!

Flywheel 7 inch diameter
Overall height 15 inches
Overall length 16 inches
Weight 19 pounds