Stirling Engine, Low Temperature

An affordable Stirling engine which works at very low temperature differences. A cup of warm water (must be at least 60 °C) can make the motor run, which means that water heated by sunlight can become hot enough to drive this motor. Like other Stirling engines, this type works by converting temperature differences into mechanical energy as warm air expands and cold air contracts. This is utilized in closed system where the same air is pumped back and forth between cold and hot engine part.
Illustrates perfectly how Stirling engines operate and can be used with many different heat sources.
Weight: 330 g. Dimensions (H x W x D): 144 x 90 x 90 mm.