Cannon

I guess real world physics don't apply to principia physics. Tried to make a traditional cannon but idk, if perfected it has some potential so derivatives allowed so y'all can tweak this till it works.

Controls:
The right sliders control the doors to keep the TNT & ammo separate until ready to fire. The top left button is the TNT, bottom left button is the ammo & button to the right of it is the fuse.