Heat-activated Stirling Engine kit by Select Solar Ltd

Description

As the temperature changes between the base plates, the engine begins to turn.;A truly unique gift for the person who thought they had everything!;Assembly required;To run the Stirling Engline from hand temperature of 36 - 37? C (97 - 99 ?F) , the surrounding temperature needs to be around 10 -15 ? C (50 - 60 ?F).;German design