I know that Davis Diesel makes CO2 conversions for Cox engines up to .049, but does anyone know of a conversion for a much larger glow engine, say a .90?

Is converting and operating a large engine on CO2 even feasible? I don't know much about this stuff, so any comments are appreciated.

Thanks!

Even if they did it would take a tank larger than the airplane to run one....

I was thinking in terms of a large land vehicle. Something, say, 30lbs. or so, and 29" long. It could support a pretty large tank, and would have some decent flexibility for shape.