
More than ten years ago, a French Formula One expert had an idea. Instead of running cars on the chemical energy of gasoline...why not run them on the physical energy of compressed air? Now that vision is extremely close to reality. Already, prototypes of "The Air Car" are on the road (see videos after the jump) and several companies have licensed the technology.
The idea is that regular old air is compressed in ultra-strong tanks in the car. Then, that air is released through a couple of pistons in the engine, which drives the wheels. Current prototypes get a bit more than one horsepower and can push the cars up to 70 mph for about 120 miles. It's not in any way comparable to something you might go and buy on a dealer lot today. But there are some significant advantages.
For one thing, it only costs about three dollars to fill up the tank. For another, the car has no emissions. In fact, the air coming out is significantly cleaner than the air in most cities. Of course, it will take some electricity (from coal power plants, yes) to compress the air, but the carbon savings are still very significant.
The re-filling process is simple and quick (if your gas station has been retrofitted with ultra-high-pressure air compressors). Several companies, most of them fairly small, have licensed the technology to produce the vehicles. However, one very large company, Tata motors, India's largest car maker, has plans to produce air cars and has released several designs for what they're going to be producing.
Tata is planning on creating a hybrid version that uses compressed air at low speeds, and then switches over to gasoline if the driver needs a speed (or range) boost.
As for a U.S. release, we're going to have to wait a little longer. Though the technology has been licensed here, it might be a while before the cars can match up to the safety regulations of the United States...or the voluminous desires of American consumers.
But for the rest of the world, the emerging markets that need cheap transportation...this could be a fantastic alternative that truly makes the world a much cleaner place than it would otherwise be.
Check out a slew of videos after the jump.
From the BBC
The Engine at Work
ON CNN
And The Longest Report

written by Sam D, January 04, 2008
written by Daniel, January 04, 2008
written by RhapsodyInGlue, January 05, 2008
Keep in mind that much efficiency is gained by virtue of the fact that this is a very small, light car. If the same shell were fitted with a small, light gas engine it probably would do as well if not better in CO2 terms.
written by Eric Boyd, January 05, 2008
http://xprizecars.com/2007/12/...on-mot.php
written by Airmon, January 05, 2008
The energy is stored by compressing the air. The energy is returned by using the expansion of the air to drive a piston.
The tank has air at 4500 PSI at the start, but the engine uses air at 450 PSI ( 30 bar - according to the video ). To regulate the air down to this level, you're going waste most of the energy of the air.
That can't be efficient.
written by Aaron, January 05, 2008
written by Maheanuu, January 05, 2008
written by filip, January 05, 2008
You ether don't smell a fart when your nose is half an inch away from the arse, or you are to hooked up by regular industrie to believe that there are other ways to engine a motor. probably becouse the glitter around it blinds you.
Then again, this fart promises not to smell bad
written by Adiabatic, January 05, 2008
The overall efficiency is what matters in the end, though. It would be interesting to compare how far an EV and one of these both go per KWH in.
On the other hand, while batteries may be more efficient, these may be less expensive. Less expensive means more in use. A lot of good may have more benefit than a little of the best.
written by Aaron, January 05, 2008
And as for the idea of a solar panel powering something that can pressurize the tank. Oh ho ho.. Oh. my.
written by ZZZzzzzz, January 06, 2008
written by AperatureScience, January 07, 2008
Compressed air vehicles are a fascinating technology to me, but the heat problem brought up by 'adiabatic' is troubling. Attaching a heat pump to the output and powering it with batteries would make an Air-electric hybrid with potentially higher efficiency.
It's a proven technology with some advantages over even BEVs, such as simpler (pure mechanical) drivetrains, and lighter motors. Like BEVs, they have high efficiency and you can charge them at home. Tanks aren't hazardous either, unlike some battery chemistries. It's a technology to keep your eye on, at least.
More info at http://en.wikipedia.org/wiki/C...ir_vehicle
written by NatureGeek, January 08, 2008
I agree it sounds a little scary, but then again, we ride around with highly explosive gas tanks under us all the time now, so, it may be able to be made safe. I'm not saying it is now, or isn't, just that I see potential here.
written by Mammy, January 09, 2008
To Carbon Savings? You do realize savings even if it's coal that powers your grid. It runs on compressed air.
To dangerous? The only real danger it does pose is if you get into an accident with a North American, or even the larger japanese vehicles, sized up nicely for the NA population consumption. Smoosh!
AperatureScience has it bang-on; CAT/electric hybrid!!
It's like the EV has been promised for decades, but it's people that can't see beyond fossil fuels that's holding it back. There will come a time when we will look back and say; why didn't we switch to electric? The technology is there people! Use it!
I mean they put a man on the moon didn't they?
Cheers
written by Fosferus, January 09, 2008
written by co2ok, January 09, 2008
The US however doesn't have the ridiculous taxation on cars and can use this idea to build upon and start again production as world leader in the automotive industry. Beat the European,Japanese,Korean car industry by mass production of environmental sane cars. :)
written by raymond, January 10, 2008
ik ken geen engels dus ik hoop dat jullie nederlands kennen
het fijd is ik ben invalide weinig geld dus een auto op lucht wil ik wel reclame voor maken
ik rij er graag mee rond dan kom ik ook nog eens ergens
dus zoeken jullie testrijders
mail me maar rstaal@wanadoo.nl
met groeten raymond staal (man 40 jaar )
written by Nick, January 10, 2008
http://theissue.com/issue/7457.html
cheers!
Nick | TheIssue.com
written by RhapsodyInGlue, January 11, 2008
Big drawback, however, is that the energy and power output goes down in winter and colder climates. Plus, heating the interior would require stealing useful mechanical power. Therefore, this looks much more attractive for tropical climates.
written by Aircar Fan, January 13, 2008
http://cyber-media.com/aircar/
written by Bob Davis, January 30, 2008
written by pankaj, February 07, 2008
written by BRN2RUN, February 08, 2008
written by tatiana, February 27, 2008
pro's con's
cheaper to fill it up
less co2 emmisions
better for our atmosphere
written by Gus Ano, May 03, 2008
Furthermore, our internal combustion engines that we use in our cars now are teeribly ineficient since they burn the fuel and therefore they produce innecessary heat that can melt the very same engine, therefore we have to power a very powerful cooling system in order to maintain the engine heat at reasonable levels, which means taking the heat into the air.
That's higly inneficient but we are used to it because oil was so inepexsive. Expanding air can be used in machines as shown above, but also it could be used in turbines, which are a lot more efficient than this engine.
Also no heat is produced whatsoever in the process.
If the air is compressed enough, it could be liquified, meaning you could go for 800 miles in one tank, for about $3.
Talk about efficiency.
Also if we use the breaks to power an small compressor, we could save a lot of energy, in the same way that hybrids use the breaks to restore power in the batteries.
written by Chris, May 13, 2008
Get real. For an urban use vehicle, this rocks. But already we could be driving (as Europeans and Japanese already do) micro cars with 1 liter gas motors which are more efficent in terms of power production and conversion than this method.
Weight = the enemy. If you want a safe car, that requires weight. If you want a larger cabin to support more bodies, that requires weight. The petrol combustion engine is no more evil than any other power source which utilizes heat for catalyzation. With appropriate gearing, weight minimalization and low coefficient of drag, we could dramatically reduce our use of fossil fuels.
And I'm not a dupe or shill, just somebody who wants to take a measured approach to change. Invariably, down the road, movements be they religious or social have a way of propagandizing away some merit. If someone can simply do an honest comparison of the possible locomotives and their actual power/pollution unit, I'll be happy. And yes, I know coal and gas each have their own pollution matrix.
thanks.
written by Chris, May 13, 2008
written by Ken, May 19, 2008
written by Frank Bonnevie, June 15, 2008
written by Jam Jam, June 27, 2008
Guys, we need to quickly reduce our dependence on oil, for security, environmental and financial reasons. Don't listen to all the hype about drilling in ANWR and the gulf coast. Continuing our addiction to oil in the long term is not the answer. We need to drastically reduce our consumption of oil right now and this will in effect lower the prices at the pump because it's supply and demand folks! Once demand goes down, prices go down. Of course, the oil companies don't want that to happen, so thats why Fox "News" and all those right-wing talk show idiots won't push for wind power, solar panels, compressed air cars or electric cars as a large solution to our problem. Their solution if continuing our dependence on fossil fuel for the benefit of the oil companies.
Individual energy independence is a HUGE threat to their bottom line and are spending millions of dollars to confuse the public and all of us have been victims of their propaganda at one time or another. Don't believe the naysayers, look to the future my friend.
written by Andy, August 03, 2008
http://www.engineair.com.au/feedback.htm
Sure there are probably a few problems with this innovation but it's a start. Imagine if governments put up a whole bunch of cash to perfect it. I wonder why they aren't? ( Actually I know why they aren't, they're gutless bastards that's why)
written by LoopyLee, August 09, 2008
written by Pilgrim, September 08, 2008
As numerous comments have already observed, there is a net loss recovering mechanical energy converted into compressed air. Few mention that there is also a net loss recovering mechanical energy converted into electricity stored in batteries. I would venture a guess that energy stored as compressed air would actually fare better than batteries for efficiency of recovery.
The size of a compressor tank can be easily accomodated in a vehicle design because it is lightweight and doesn't require heavy structures to support. Conversely, batteries require heavy additional structural support plus expensive corrosion resistant materials adds to production costs.
Once air hybrids hit the streets, 2nd and 3rd generation improvements will further refine the breed. Electric hybrids will then be destined to dinosaur status.
written by Elizabeth LaZella, October 11, 2008
written by Dr. Doug Haynes, January 17, 2009
Finally your flying car of the future is coming this Christmas season. Dr. Doug E Haynes and his aviation support manufacturing division (DEHAS) has completed the summer flight testing program on both the DEHAS-7 (Jetson Mobile) and DEHAS-7 Cessna Skylane) equivalent classification of our flying disk vehicles. Initial estimated purchase prices for these 100% non- polluting, UFO looking saucers are now available on DEHAS product line web site at www.bluenebula.com. Along with Blue Ridge Nebula
Spaceline space transportation reservation / prices.
As always thanks and God Bless you all this summer.
Dr. Haynes and his FAA/AST Spaceline Kid Camp takes off this fall
The Blue Ridge Nebula Spaceline family gets ready to host our final Ed Dwight Google Lunar Launder Youth competition this fall in either Colorado or New Mexico. The youth of America will be competing in the process of navigating space robots to a variety of simulate NASA Apollo moon landing sites strategically located around Dr. Haynes Blue Ridge Nebula Spacelines Saucer. Blue Ridge Nebula Spaceline is the worlds first, safest and most economical priced FAA/ AST registered Spaceline. Blue Ridge Nebula Spaceline has just completed it summer 2008 Flying Saucer test flight program and will demonstrate it’s amazing capabilities again this fall.
As always thanks feel free to stop by our websites at www.bluenebula.com
www.blueridgeairlines. or our home base here in Colorado.
God Bless you all this summer and fall season
written by avagadro, February 19, 2009
If you understood the processes involved and followed the energy through the system, you would realize that air is a very poor energy storage medium. The amount of air in the atnk at 4500 psi can not move a vehicle more than a few miles.
All of the info you need to evaluate the concept is readily available on the internet.
The air car company understands that people like to believe in ideas that will benefit them, if people were objective they would take the time to understand what was being discussed instead of blindly believing what a promoter claims. All we have from the air car company is claims, no proof whatsoever, isn't that odd? Just what are words worth? To me they mean nothing without proof.
10 years of promises that have never materialized tells you something.
written by John, February 22, 2009
If you believe the claims that have never been proven, you do yourself a disservice. The claims made by MDI have never been independently verified and are in violation of the laws of thermodynamics. But forget the laws of thermodynamics for a second and ask "why has there never been proof of the claims made by MDI"?
Answer: The cars can not perform as claimed... simple answer.
written by Classic car classifieds, March 26, 2009
written by Linda, February 20, 2010
written by sonam, May 17, 2010
written by saga remy, July 19, 2011
written by z-wave, October 01, 2011
written by z-wave, October 01, 2011
written by Ashwin, November 12, 2012
Have a look http://www.roundone.in
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The prototypes and the videos have been around for years.
There has been hype and promise re air car for years ... with it about to be deployed ... and those abouts have stretched out ...
When it comes to the Air Car, I come from Missouri: "Show me ..."