Algodoo

An engine that uses water and gravity as fuel. This model uses (first time for me) a basic script to spawn water. On startup the engine might lag a bit (it can take upto 6000 water particles during startup, when the engine is running it will become less then half of that.

This model has one cilinder but works both ways for a more constant speed.

Controls:
1 - Enter to start/stop the water spawner (toggle)
2 - Shift to release the brake on the flywheel (toggle)
(3 - Ctrl to give the flywheel a little speed, optional)

Controls are also in the scene