Algodoo

A collision engine, but with a throttle and three collision groups for the 'combustion', hence the name Tri-Collision-Engine. Idle speed is 4.5 Rad/s, and full throttle speed is 19.8 Rad/s. Up/down arrow keys for throttle up/down, the throttle slowly goes back down to idle after a short time.

Feel free to put it in a vehicle if you like, just remember to give me credit.

Updates V1.1:

Gave the engine a lower idle speed
Made the throttle a bit more responsive
Idle speed for engine is now 4.5 Rad/s