Algodoo

My water piston dual action engine works by using sporned water to pressurise inside the piston chambers where it pushes the two pistons down before hitting the killer and being deleted. The momentum causes the pistons to swing round making the chamber smaller while bringing the sporn ball round the create more water. As the piston reaches the top the sporn ball hits the top of the chamber sporning water continuing the cycle.

You would not believe how long it took to synchronise the water chambers and stop them backfiring on each other. And then it kept stalling because i conected the engine directly to the wheels (which i then removed as i couldn't manage to adapt the engine for a car) which brought on a new mechanism which failed in brand new ways. This vertion of the water engine is the least failureific