Umm... yeah. A French company has developed a way to power a car on air. It is being developed jointly with India's Tata Motors where it will first be sold later this year. Even more interesting is that it will be sold in the US around 2010. It gets 125 miles per fill up and costs around $2 to fill. Here's the US manufacturer's website if you are interested: http://zeropollutionmotors.us/
If you think about it, it's better than batteries from a weight standpoint. You could build a combustion (Internal or turbine) engine/ air hybrid and save a lot of weight as compared to a engine/ generator/battery hybrid.
If you think about it, it's better than batteries from a weight standpoint. You could build a combustion (Internal or turbine) engine/ air hybrid and save a lot of weight as compared to a engine/ generator/battery hybrid.