Algodoo

This is one of my latest engines, and unlike my other radial engines, this one doesn't need to have a flywheel of any kind, as my others did. I have made a very basic car out of it that is quite slow, but is capable of climbing a 60 degree plane. You can easily delete the wheels and use it in a better car.
EDIT
Controls are:
Enter to toggle engine on/off
Left arrow to start engine to make the car go left
Right arrow to start engine in the right direction
Up arrow to go