This video shows one of our assembled kits being powered by a cup of hot water. As the engine runs the top plate of the main cylinder becomes warm and the engine slows down. Place a cube of ice on it and the engine will speed up again.

Our kit is fun to make and helps understand the principles behind this remarkable engine.

The DVD captures Patrick's essential qualities, sometimes irreverent, sometimes controversial, always with a mischievous twinkle in his eye. He tells us why he remained a reluctant batchelor and shares his views of politicians and bureaucrats.

Here's a small sample but take our word for it, it doesn't do the DVD justice. You need to watch the whole thing.