There is no other motor as efficient as the Di Pietro Rotary Air Engine. It is 100% more efficient than any other air powered engine built to date and its high torque makes it the first air engine suitable for mobile applications. The invention has the capacity to revolutionise transportation, plus offer a multitude of energy-saving benefits in stationary applications. The engine has no emissions, is very quiet, has constant high torque, a low parts count, no vibration and is very efficient - only 1 PSI of pressure is needed to overcome the friction to enable movement.
Read the full article: Significant new rotary engine design runs on compressed air