March 4, 2009 3:05 AM PST

Fill 'er up, with air

by Wayne Cunningham
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AirPod

The AirPod is a three-seat and three-wheel car that runs on compressed air.

(Credit: CNET)

Among the plethora of alternative fuels being put forth to replace oil, the most odd might seem simple: air. But MDI International, based in Luxembourg, showed off a car at the 2009 Geneva auto show that runs on just that. What motivates the little AirPod concept is the energy from compressed air stored in a tank at 5,000 pounds per square inch (PSI).

AirPod

The driver sits alone in the AirPod, turning the front wheel with a joystick.

(Credit: CNET)

The AirPod vehicle is small, holding just three passengers, with a single seat facing front for the driver and a bench facing backward for two more people. MDI claims a range of more than 112 miles in an urban setting, and less than two minutes to refill the 46-gallon air tank. But even though the AirPod can reach speeds of just less than 45 mph, the air-powered engine produces only 8 horsepower, suggesting slow acceleration.

Because of the low horsepower, the AirPod is designed to be exceptionally light, coming in at 485 pounds. Because the air tank and engine don't take up much room, most of the AirPod is devoted to passenger space. The car is a three-wheeler, and the driver uses a joystick to turn, rather than a conventional steering wheel.

Although air power means the AirPod drives emission-free, some energy is required to compress air into its tank. MDI puts the cost of a tank refill at just 1 euro.

MDI has announced deals with Air France and KLM to run a test fleet of the AirPod cars at Charles De Gaulle airport in Paris and Schipol airport in Amsterdam.

See more coverage of the 2009 Geneva auto show.

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Add a Comment (Log in or register) Showing 1 of 2 pages (57 Comments)
by ADustman March 4, 2009 4:14 AM PST
While I'm all for alternative fuels, these new vehicles seem to be rather unattractive.

I'll stick with my big V8, and actually enjoy driving.
Reply to this comment
by Shaun822 March 4, 2009 6:08 PM PST
I sincerely hope you don't believe you need a "big V8" to actually enjoy driving.
by kylebuttermore March 4, 2009 10:51 PM PST
i agree, im not a person who needs something to look amazing to use it but this is one of the ugliest cars i have ever seen...
by b_baggins March 5, 2009 7:35 AM PST
@Shaun

Why not? I'm getting sick of this judgementalism brought on by envy. If he wants to drive a big V8 because he enjoys it, more power to him, and keep your nose out of his business.

And, no, his V8 is not destroying the planet. It's feeding plant life with lots of delicious carbon dioxide.
by ace10134 March 5, 2009 9:12 AM PST
I drive a 250cc Kawasaki Ninja motorcycle and probably enjoy riding that more than a big truck.

Plus, I get over 60 MPG with my motorcycle!

Driving fuel effecient and having fun is possible, just get a motorcycle!!!
by c|net Reader March 6, 2009 6:35 PM PST
Driving a motorcycle may be cool and fun, but it's hardly practical. You are hard pressed to use it during inclement weather, particularly when the temperatures are low and there's snow and ice on the roads. At best, a motorcycle can carry two people, while a "big V8" implies a vehicle to carry at least four plus significant quantities of cargo. Besides those disadvantages, a motorcycle is terribly dangerous.

I'll stick with my four wheeled vehicles, thank you.
by ofmyony March 4, 2009 5:44 AM PST
I like it give me a slow lane and I will enjoy the scenery.
Reply to this comment
by sparrowhyperion March 4, 2009 6:41 AM PST
Now this is a cool concept as long as the air tank doesn't burst, then you get people chop suey.
Reply to this comment
by mraardvark March 4, 2009 7:56 AM PST
My understanding is when scuba tanks fail they don't explode, just vent and freeze over (i'd e worried more about frost bite). But at 5000 psi in 500 lbs car a sudden venting might make for a wild ride.
by extirpator March 4, 2009 4:17 PM PST
They use carbon fiber tanks so that if there is a crash the tanks will splinter in a way that prevents explosions, and also shouldn't affect people in the car.
by willdryden March 4, 2009 11:33 PM PST
Mraardvark is correct. You would get peoplecicles not people chop suey. I have seen the threads fail in a tank once. The valve went through a brick wall.
by b_baggins March 5, 2009 7:36 AM PST
@willdryden

Right. Because the air tank taking off like a rocket is totally harmless....
by gdmaclew March 4, 2009 6:55 AM PST
And just how do you drive this thing in the winter?
How do they power the heater?
Reply to this comment
by Weudel March 5, 2009 6:07 AM PST
The same way they power the heater in any other car... strap an alernator to any moving part....
by not2worried March 5, 2009 7:08 AM PST
Heater in your car works off the heat of your motor (IE radiator fluid )

Gdmaclew's right, what do you do... In Minnesota, one of the City's tried going "green" with an electric car for one of the city guys.... But the car had NO heat.. sucks when its -15 out!

Plus cold weather is going to change how a car like this would run. Air can have water in it.. and can freeze!
I'm all for new, cleaner, cheaper cars and truck ( I think electric will be the way to go ) But this is not it.. not for most.
by Seaspray0 March 4, 2009 7:00 AM PST
A better application for this would be a golf cart.
Reply to this comment
by theoboley March 4, 2009 10:09 AM PST
Yes... A 45 MPH golf cart. The people at pebble beach will be ecstatic with your 500lb golf cart tearing up their fairways too.
by worsethannormal March 4, 2009 7:35 AM PST
@ADustman: When looking at a vehicle like this you need to consider if there is an appropriate use for such a thing. There is. This is not designed for Suburbanites or Exurbanites, instead, this is a purely urban vehicle. It fits into a high population, high traffic area perfectly. I could see this as a perfect replacement for the smaller 'taxi' vehicles in other countries. Consider the Thai tuk-tuk or Auto rickshaw (http://en.wikipedia.org/wiki/Auto_rickshaw). Most countries across Asia, Central and South America and Africa have vehicles like these on the roads. They run on an air-cooled scooter version of a two-stroke engine which produces as much, if not more, CO2 and other crap as a Hummer. In a tight packed city like Bangkok or Mumbai ,or even New York or Chicago, a vehicle like this could make a vast improvement in the air quality and reduce operating costs for the drivers. If this works, it would be a win-win for such places.
Reply to this comment
by Button Boy March 4, 2009 7:59 AM PST
I wonder how far it would go on that beef and broccoli burrito I had this morning?
Reply to this comment
by HeavyJim March 4, 2009 8:28 AM PST
IF this thing ever catches on (snort chortle) more money will be spent dragging it back to an air compressor than it would save.
Reply to this comment
by aka_tripleB March 4, 2009 1:55 PM PST
You could always just keep a hand pump under the seat. Sure, that's not too efficient, but you'll never really have to technically running out of fuel.
by extirpator March 4, 2009 4:20 PM PST
Their prior prototype cars had built in compressors that could fill the tanks in roughly 4 hours off a standard ac jack. France apparently has several prototype Air stations that have high speed compressors that could fill in under 4 minutes.
by b_baggins March 5, 2009 7:40 AM PST
@aka

Filling a tank to 5000 psi with a hand pump is impossible.
by imhodudes March 4, 2009 9:25 AM PST
Very, very cool experiment. No batteries, fast refill, essentially running on electric power (from the compressor) but with no need for batteries! And, a working prototype to boot - doesn't say if it runs off a standard gas-station compressed air hose, but it can't cost much to acquire a proper compressor, or even have a compressor built into the car and just plug it into 110 or 220. This is ten years ahead of hydrogen, at least - and by contrast, under- rather than over-hyped by the media. Could also potentially receive compression directly from mechanical power - like a wind or water mill - with no need for electricity as an intermediary.

No dangerous fuel on board, too.
Reply to this comment
by Nighteye19 March 4, 2009 5:52 PM PST
Doubt many gas station air hoses would work. Most put out a max around 100 psi, far from the 5000 psi needed to fill that tank. A fast, good 5000 psi compressor is going to run around $12,000.
by scottthesculptor March 4, 2009 9:48 AM PST
maybe "1 euro" of *electricity* to fill 46 gallons (6.5 cubic feet)
but it takes a $3000 compressor to fill to 5000psi in two minutes

still the cleanest urban vehicle.
use solar to run the compressor and the carbon footprint is just the manufacture of the hardware.

If it makes sense the mini taxis of the world will convert - fiber wound tanks and old air tools for motors.

but of course one V8 gas guzzler commuting 30 miles will negate the gains of 100s of these.

Can't wait for oil prices to go back up.
Reply to this comment
by c|net Reader March 6, 2009 6:40 PM PST
Manufacturing and transporting the compressors add to the carbon load of such vehicles. The electricity generation adds to their carbon load. Compressed air is a particularly inefficient way to power a vehicle as much more energy is consumed in compressing the air than is transmitted to the wheels. There's no point in touting any such "emission free" vehicles without discussing their total burden.
by Get_Bent March 4, 2009 10:54 AM PST
Send these things to Washington D.C. and give them to our representatives. They're so full of (hot) air that the cars will never need to top off their tanks....
Reply to this comment
by galeso March 4, 2009 11:00 AM PST
I want one. My 4 mile commute does not let me legally go over 40 mph anyway. Can I use a slower less expensive compressor?
Reply to this comment
by dddouchebag March 4, 2009 11:54 AM PST
Still need the electricity to power the compressor from somewhere... yet another example of "out-sourcing" our pollution. I guess americans feel better if all the air toxins are produced at the powerplant instead of inside the car itself.
Reply to this comment
by BenFlavoredCandy March 4, 2009 12:28 PM PST
Power plants produce orders of magnitude less pollution per energy output than cars. Plus they capture a great deal more pollutants, particularly particle matter. So yes, as an American, I do feel better running my car on power plant energy than gasoline [as long as it isn't stored in a lead-acid battery]!
by streamline35 March 4, 2009 4:33 PM PST
As benflavoredcandy said, power plants produce a ridiculously lower amount of pollution per unit of energy than internal combustion engines. ICEs waste most of their energy by giving off heat, and they have alot harder time capturing and cleaning their pollution. If a car gets 30mpg, you could get 110 miles worth of electricity from burning that gallon of gas in a power plant rather than the car's engine. It is actually still cleaner to run an electric car off a coal power plant than it is to drive an equivalent car with an ICE. And of course it is preferable to start phasing out coal plants and move entirely to cleaner and more renewable energy.
by b_baggins March 5, 2009 7:42 AM PST
@streamline

Except for the fact that you'd need to build something like 58 new coal fired power plants to provide the needed electricity, or a few thousand square miles of wind farms or solar farms.
by streamline35 March 5, 2009 10:31 AM PST
b_baggins - That's assuming everyone switched over to electric cars all at once. We'll get there eventually, hopefully sooner rather than later, but yes, it's going to require a large initial investment in renewable energy. Scientific American estimated that we could become completely energy independent if we built $400 billion dollars worth of solar panels in the central american deserts (arizona, new mexico, etc..). With the bailout and all, that suddenly doesn't seem like too much money (we've probably already given that much to AIG alone).
by fa1coner March 4, 2009 12:09 PM PST
compressed air tanks only explode when pressure build up too high, all tanks have a release valve which blows in this case and causes a controlled release to prevent a catastrophic failure. no you can't fill up from a regular gas station air hose, they aren't capable of producing anything more than about 100psi. i imagine they would use a compressor somewhat similar what is used for scuba or paintball which cost, as was said, around $3000 upwards. this would be great for anyone with short commutes or in a highly urban area. I'm sure these will be a great hit in europe where everything is much more centralized around downtown areas.
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by patriotsrule1337 March 4, 2009 12:24 PM PST
"and a bench facing backwar for two more people"

Typo: "backwar" should be "backwards"
Reply to this comment
by MrMurder March 4, 2009 1:04 PM PST
This is an good attempt at making an enviormentally friendly car. But it has a weird form factor. And if the car takes one second to go one mile faster, it would help clog highways. Although it has a fast reload time. But if it's one of the only new things that'll sell only in Europe (like that Cinema 21:9 TV from Philips) I am not going to buy anything from a European company.
Reply to this comment
by CountBep March 5, 2009 7:55 AM PST
Why? I live in europe, and i choose the product that suits my needs. If it's not made by kids in Bagladesh, that is.
by deecee March 4, 2009 1:04 PM PST
Statement from the article seem a bit odd, eventhough comments from some the readers here shed a light as why America is in our energy crisis we're in now. But that's another point...
"8HP suggests slow acceleration." Acceleration normally is associated with torque of the engine not HP ratings, HP rating affect top speed more than acceleration, and stating 8HP means slow acceleration is somewhat misleading. Most motorcycle has much less HP than a car, but low weight and effecient drive draing more than compensate it in acceleration department, in top speed too.
It's not to say I believe the AirPod is a speed racer, but HP rating isn't everything, this is such a non-traditional design, I am all for it!!
Reply to this comment
by mordantennui March 4, 2009 1:10 PM PST
Alright so for years concept cars have been boasting of better mileage, better emissions, etc..
Why haven't any of these become commercial? Or is it just not in North America? Sure they usually look
weird and are probably more expensive to manufacture, but SOMEONE would buy it! I know I would, if I had the money.
Reply to this comment
by b_baggins March 5, 2009 7:44 AM PST
Because they are underperforming and over-priced. Truth is, nothing out there right now beats gasoline for portability and energy density.

The only reason this is even an issue is because environmental propagandists have succeeded in brainwashing enough people to forget their third grade education about carbon dioxide being plant fertilizer and have re-programmed them to think it is the most toxic substance on the planet, next to Republicans.
by deecee March 6, 2009 8:48 AM PST
For the planet food comment, CO2 may be usable by plants during the day, but the limited supply of not-really-renewable fossil fuel is a cause of concern much graver and threatening than green house effect.
by gigabytez March 7, 2009 11:30 PM PST
watch "who killed the electric car"
by W1gglesnarf March 4, 2009 2:32 PM PST
I'd be worried i would end up underneath a bigger vehicles tire.
Reply to this comment
by streamline35 March 4, 2009 4:46 PM PST
Then no matter what you drive, you should probably stay off the freeway. I hear that's where semi trucks drive. Oh and stay off the road in the city too, there are buses in the city. And whatever back country roads are left for you, drive a hummer h2, just to make completely sure you have the biggest, heaviest vehicle on the road.
by kjonna March 4, 2009 4:56 PM PST
How do you pick chicks up with this thing? It would be funny saying to a hot chick "hop in the back"
Reply to this comment
by illegallydead March 4, 2009 10:56 PM PST
haha well then, you just have to resort to picking up hippy chicks.

Living in Boulder, CO, I know I could pick up chicks just by driving down the road and hollerin out: "Hey baby, this thing doesn't use ANY gas. Hop in, I'll give a ride back to the commune ;)
Showing 1 of 2 pages (57 Comments)

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