This fits your. Make sure this fits by entering your model number. Package Includes: 1 x Vacuum Motor Model Kit(not included alcohol) With the help of the flywheels, then a net conversion of heat energy to mechanical work. Mechanical work through small generators produce electricity to power a light bulb. Can be used for teaching purpose. What is the Stirling Engine? A Stirling engine is a heat engine that operates by cyclic compression and expansion of air or other gas, the working fluid, at different temperature levels such that there is a net conversion of heat energy to mechanical work.The engine is like a steam engine in that all of the engine's heat flows in and out through the engine wall.