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 had two cilinders 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