This is a fairly basic Stirling engine. Place it on top of a cup of hot water, or, a cup of ice water, and away it goes. As long as the temerature differntial is sufficient, this engine is well made enough and well balanced enough, that it works very well. A great intro to the concept of heat exchange, for a school project, or merely as a conversation piece.
Bought it for my husband as a birthday gift and he LOVED it! It was his favorite gift. Now everyone in the family knows what a sterling engine is and how it works.
Exactly as described. It arrived early and packaged securely so there was no damage. Excellent product and a lot of fun.
This little engine arrived promptly, and it worked right out of the box from the heat of a cup of hot water. To anyone unfamiliar with Stirling engines it looks like magic. I highly recommend it.