Algodoo

Like my Tri-C-Engine, but has one more combustion group. Runs really smoothly and pretty quickly (quickly for a collision engine).

Has an arrow key controlled throttle. Up arrow key for throttle up, down arrow key for throttle down. Throttle slowly goes back to idle when reved up.

Idle speed is about 7 Rad/s, full throttle is about 20 Rad/s. Uses collision groups A through E and J.

Feel free to put it in a vehicle, just make sure you give me credit.