Hey guys,
Currently I am working on a little model of a theoretically working combustion engine (4 stroke) which will be 3D printed.
After a few tweaks, the Piston slides through the cylinder like a charm (left pic), next up is the cylinder head.
On the right one you can see what I’ve done so far…
More to come, I’ll keep you guys updated! 
Is it based off of an existing design or your own design? Will it run on compressed air or is it a demo powered by an electric motor?
Brook
@Brook_Drumm hey,
It’s my own design, which I started from scratch, only the working principle of a engine isn’t my own.
Since it has rubber sealings it could run on both, compressed air and with an electric motor. I’m not too sure till now on how I will do that 
Jonathan