Compressed air engines and vehicles have been around for at least 150 years (usually in limited operations, for example in factories where dangerous materials made steam or IC or even electric impractical). As a method of energy storage it is inherently fairly efficient so it is difficult to see where improvements can come other than in simply using higher pressure storage.
I don't know what pressure is needed to get a useful range, but I suspect it is pretty high. And there are serious risks in handling high pressure air (above 2,000psi).
John
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
Bookmarks