I was having a similar discussion with a friend about this vehicle...based on this site:

http://www.popularmechanics.com/auto...s/4217016.html
1) range of

**125** miles

2) carbon-fiber tanks with

**340 liters of air at 4350 psi**
3) gives us an air consumption rate of

** 2.72 L / mile**
Assuming the performance numbers are accurate, we started to do some math:

1)

**1 ft? = 28.3168 L** meaning that the car would have a capacity of appx

**12 cf **of air.

2) A run-of-the-mill scuba compressor (ie.

http://www.americanairworks.com/aircompressor.html -- American Airworks Fast 35 -- Portable AC95535 - Honda 5.5 HP Gas

$3090 ) rated at 3.5 CFM @ 4500psi would recharge the cars air tanks in about

**3 1/2** minutes using gasoline.

3) If we assume 1 hour / gallon running at 100% output (in generator form, the Dewalt Heavy-Duty 2900 Watt Gas Generator - DG2900 will run 11.3 hours at 50% output on 3 gallons) and a fuel tank of 3 gallons, the generator should be able to recharge

**630 CF of air @ 4500psi** in 3 hours.

4) The 630 CF of air should translate to appx 17830 L of high pressure air.

5) This should give a theoretical range of about 6555 miles on 3 gallons of gasoline, or about 2185 miles per gallon. Seems a bit high to me...so lets increase the generators fuel consumption by a factor of 10x.

You will need 30 gallons for the same trip giving you 218.5 MPG. Seems pretty good.

My only question for such a long trip is: at what speed is that range of 125 miles achieved? If it is at 30 MPH, that's a LOOONG trip!!

Perhaps we were up a bit late, and I admit that simple math often trips me up...

**are we missing something here**? Sounds like it is vastly more efficient to have a small compressor running at 100% for short periods and then stretch the resulting stored energy out over a longer period of time using an engine that is designed for that purpose. ??