Saw this, looks like the guy who's building a compressed air powered
go-kart using a Tesla Turbine might be on the right track.
Take An Air Taxi
A French company will build 40,000 taxis that run on nothing but air
for use in Mexico City, the most polluted city on Earth. Guy Negre, a
former designer of engines for Formula 1 cars and lightweight
aircraft, has been working on his "zero pollution" design for almost
10 years. The engine gets its power from 80 gallons of air,
compressed to 300 times atmospheric pressure. Negre says tests
indicate that it can run for 120 miles in an urban environment, at a
speed of 30 mph, and it can reach a top speed of up to 60 mph.
To recharging the car, the driver would stop at an "air pumping"
station, where the tanks would be refilled. The stop would take less
than five minutes.
The car runs by releasing the super compressed air into a piston
chamber, which drives the piston down. Heated air from outside is
then added to the chamber to warm it up, and the mixture is expelled
as the piston rises again. The expelled air is passed through carbon
filters, meaning that it will come out cleaner than it went in. This
car not only runs on air, it actually cleans up the atmosphere.
Negre says the car handles and drives just as well as a gas- powered
automobile. He's licensed the design to a number of companies to
build it in different countries. They may be manufactured in Mexico,
South Africa, New Zealand, Australia, the United States, Switzerland
One problem will be how to provide a big enough network of air
filling stations, and how to start the car if the air tanks are
nearly empty, when they might not have enough energy.
For more information, click here.