R01 Stirling Engine Model 1. As far as I know these are the smallest scale model Ericsson engines ever made -- until you make one smaller. To start the engine, simply fill the gas tank with butane gas, turn on the gas valve switch, ignite the boiler under the engine, add about 80ml of water to the water tank, heat it for about a minute, and then start the engine by hand-cranking the flywheel.
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