Air powered engine how it works and how to built NO PETROL (Andrew Marzban)

A series of videos by http://www.andrewmarzban.blogspot.com explaining how his compressed air engine functions. He modified a normal Briggs and Stratton lawnmower engine.

He ended up mounting the air engine on a bicycle on which he'd previously mounted an electric motor. It made for an extremely uninspiring demo video at the end. But the first video explaining the engine is real interesting.