Stirling Engine - Low TemperatureThis engine was invented by London's Pastor Robert Stirling in 1816, so it's named "Stirling Engine". The Stirling heat engine is unique because of their theoretical efficiency is almost equal to the maximum theoretical efficiency, known as the Carnot cycle. Features: Stirling engine model is an educational tool that explains the theory of air expansion and contraction. By using this model, teachers can explain this theory in a much straightforward