Fortune Fish Puskas Engine
This is a simple engine that operates using a differential in humidity. The design is basically a ‘Puskas Engine’ but with a plastic reactive element instead of a paper one. The element is a ‘fortune fish’ toy that curls up in your hand when you hold it. it worked perfectly in this application This video was shot with an air temperature of about 80 F and an air humidity level of about 72%. It was a very high air humidity and yet it still worked.