Stationary Engine Kits

Anthony Mount Models

Bailey's Vertical Hot Air Engine

Bailey’s vertical hot air engine runs on the Stirling engine principles. Heated air expands inside the hot cap and moves to the power cylinder exerting pressure on the power piston causing the power stroke. At the same time displacer moves the now cold air back to the hot cap for reheating.

The engine full size was rated at a 1/4hp, and was mainly used for pumping water. A pump was fixed to the side of the engine and was driven by a crank on the flywheel.

They were built at the Albion Works Salford Manchester.

The model is attractive to watch in motion and is fairly simple to build. An extensive range of castings is supplied with the kit. The firebox, displacer cylinder, water jacket, power cylinder, bearing brackets, displacer cover, cylinder cover and flywheel which is 6” (150mm) diameter are gunmetal castings. The displacer is made from a brass tube. The hot cap is a stainless steel spinning. The other parts (not supplied) are made from bar stock.

A set of 29 A4 drawings are supplied with the kit plus a parts list. The drawings have dimensions in both imperial and metric.

The heat source can be a ceramic burner gas fired with Butane. A suitable burner is available from Bruce Engineering who can also supply the gas valve.

The engine can be machined on a 3 ½” lathe, nearly all the work is turning with just a little milling. A large fixed steady is needed for some of the turning.

It is good introduction to the world of hot air engines, and being a reasonable size the parts are not to fiddly to make. Though the prototype was painted, the castings are so arranged that they can be machined all over. The polished gunmetal and steel making an attractive combination.

The engine was serialised in Engineering In Miniature from March 1999 to December 1999.