15ccm Compressed Air Engine

UPDATE: I added a V2 teppet. It sits tighter into the cylinder and causes less blowby, causing a more efficient run at even lower air pressure.

This engine is inspired by Tom Stantons Compressed Air Engine.
But with some small changes. Toms engine has about 2.7ccm, mine has about 15mm capacity.
It has way more torque at higher pressures. I tested it with up to 16 bar (232psi). But of cause it’s less efficient, even if it runs on very low pressure too (about 0.2 bar or 3 psi).
I didn't like the solution to glue the cylinder head to the crankcase. So in my version they are screwed with 4 M3x10 screws. Just like the cylinder head. 
It needs a heavy flywheel to run smooth. I use a 160mm rotor from a bicycle. But you can easily make your own (for dimensions take a look into the photos if you haven`t already).

BUILD
The building procedure is just like the one of Toms engine is. Link to his video down below.
As valve I do not use a rubber seal and a BB pellet like Tom does. I f