8 Cylinder Radial Engine

Another radial engine. 8 Cylinders this time. This one is much more precise since I was able to use the grid and as such runs more smoothly. Furthermore I added a reverse.
Ultimately I want to power a vehicle with this, but without a 4th layer or some way to attach pivoting objects to the edge of a disk, it just wont work.

The vertical sliders should be treated as toggle switches for forward/reverse and the horizontal is cycle speed/throttle.