alt.engine :)

Maccano Stirling Engine. Uses trapped air, not steam.
1 min 59 sec
http://video.google.com/videoplay?docid=6669150866941095608

First Video of a Stirling engine built from Maccano, often called the sterling engine by mistake, this one is built from various tin cans, a graphite Piston running inside a glass cylinder, sleeved in black plastic and Meccano. For the technically minded, the displacer is 6cm diameter by 2.5cm stroke, and the piston is 1.6 cm diameter by 3.3cm stroke. The displacer is in an air tight chamber and is moved up and down, by a thin wire passing through a seal made of silicone bathroom sealant. This moves 'displaces' a trapped volume of air from the 'hot end' heated by a tea light candle and the 'cold end' which is at room temperature, this causes the air to expand and contract, pulling and pushing on the piston, driving the engine.

second Maccano Stirling (not Sterling) engine video. Uses air, not steam.
2 min 59 sec
http://video.google.com/videoplay?docid=6722525898773946604

The Lister Diesel Engine, also known as the Listeroid engine
2 min 59 sec
http://video.google.com/videoplay?docid=4155505156623488980
his is the legendary British Lister Diesel engine, still made in India, the Indian engines are affectionately known as the Listeroid. There are many of these engines still about, the best thing is, they can be run on waste vegetable oil, and are very efficient and a delight to live with