BNPE (Brand new piston engine) alpha test.

This is my first attempt at a piston engine with the current physics, It's much harder to make a working piston engine than it use to be. it's weaker than my older ones on older physics. Their is no iginiton timming so its hard to change its speed. something is also geeting caught somewhere. the right button is to get the engien spinning. hold it for ~3 secs to get it going at working speed.