Acrylic Wankel Engine Model

I have made a single rotor Wankel engine model using laser cut acrylic board. It works really well after assembly. If I turn the output shaft, the rotor will cycle inside the engine. As it is made of clear acrylic, the movement of rotor can be seen directly, which help me understand how the Wankel engine runs. 

The model is assembled from four layers of acrylic board. The outer two are mainly side wall of casing and the middle two layers has the gears, crack shaft and the rotor. I have attached my design in cad file here if anyone want to make one copy or extend my work.

I took inspirations from AutodeskInventorDUDE's video (part 1, part 2) to draw the cylinder and rotor of the engine. For the gears, I figured out the number myself based on the number in the video. I used a AutoCAD plug-in called TrueGear (download can be found here) to draw the teeth of gears. PLD lisp script here is adopted to slim down the dense 

polyline TrueGear generated.

I would like to make this model runnable by itself by adding a compressed air inlet and exhaust outlet in the future. But at present, I do not know how to do it. If you have any ideas, leave some comments at the bottom or at the Youtube page.

Youtube video:

Picture:

Finished engine model

CAD Drawing