Nutating Disc Engine (functional demonstration)

A nutating disc engine is a type of positive displacement engine that uses a wobbling disc instead of pistons or rotors. The disc inside nutates - meaning that rather than rotating, the disc wobbles on it's rim like a coin as it dies after spinning on a table. This particular model, while really just a demonstration of the concept, will actually spin if you apply enough compressed air to one of the inlet ports. Unfortunately, it lacks any proper seals which would allow it to generate any real power. On the plus side, it is very easy to disassemble to see how it works inside. It's a little hard to figure out how this engine works until you see that 1) airflow is blocked between the inlet and the outlet by a stationary vane (that also keeps the disk from spinning) and that 2) the funky dog-leg shaft forces the conical part of the disc to seal against the top and bottom of the chamber creating isolated high pressure and low pressure air pockets. This pressure differential (from in