Algodoo

In continuing my venture with Spawn engines, this next one does away with the impact-lever, which was prone to "exploding", and instead using a directly connected Gear and Ratchet assembly, providing remarkable power from a single piston.

The piston itself is able to operate at low velocities, reducing vibrations that otherwise plague single-cylinder engines.
(However, I may add in a 2nd, anti-phased piston to completely negate vibrations.

Controls:
Hold Q to start the engine.
Press F to engage the Clutch.
Press S to apply the wheel brakes.

Gears are cycled through 1-6, and on toggle; be sure to deselect the current gear before changing.
(Not such a problem with an engine with as much torque as this)