Algodoo

Why is not moving??

@Mustang41: It doesn't move because of those crappy gears.

Feedback Here:
1 Move the piston rod closer to the center of the flywheel,
2 Delete the heavy flywheel. You don't need it.
3 Make the engine crankshaft heavier (15 kg is enough),
4 Make the ball spawner a circle that collides with the cylinder (it will spawn 1 circle at a time, that's much better),
5 Make the ball radius 0.25, so that it fits perfectly on the block,
6 Make the ball and piston restitution 0. That will give the engine a speed and strenght boost,
7 Change the gearbox gears to circles with +inf friction, and 0 restitution. That will give you more traction (a lot!).

Ok, that's all. Hope you understand it .

Oh, and use stretched hinges as transmissions to replace the boxes.