Operating Sterling cycle engine, gas powered.

Working model of a Sterling Engine. The Stirling engine is a heat engine, obtaining its heat from outside, rather than inside, the working cylinders. Any source of heat will power a Stirling, as long as there is enough temperature difference between the top and bottom of the engine. The cylinder of the engine contains gas (air). The gas is alternately heated then cooled. When the gas is heated, its pressure rises, and it moves a piston. The gas is then cooled, its pressure drops, and the piston is sucked back to its starting position. The cycle then repeats. For a more detailed explanation, read THE STIRLING CYCLE ENGINE by Andy Ross, in room 72 LeConte. ENGINES AND PUMPS.