Rotary air engine

Air power.
100% more efficiency is a very serious claim!

The Di Pietro Rotary Air Engine. Zero pollution, very low friction, 100% more efficient than competitors. Very nice, very nice indeed! 'It has low number of moving parts. It is compact and light. It has virtually no friction. It has virtually no vibration. It uses its own momentum to its advantage. It cushions its own parts on a film of air. Only 1 PSI of pressure is needed to overcome the friction. [via redferret]