Sweet... now if it had a fabulous air to hydraulic fluid driven electric generator. Start with a compressed air tank. The air drives fluid between two tanks. The fluid drives an electric generator. It doesn't matter which direction the generator turns it is all AC, electrically speaking. "Power stroke" is the two words you are looking for here... instead of cubic inches, the power stroke is measured in gallons and yards per hour. Hydraulic fluid driven through a venturi. These days the tanks can be made from carbon nano-tubing fiber and resins that are as strong as steel and lighter than plastic. Better yet water and maybe some dish detergent instead of hydraulic fluid. It could even have a built-in hand pump for air... -Q