Originally Posted by Dr.Danger
My favorite way to describe the cycles of a 4 cycle engine isn't intake-compression-power-exhaust; it's suck-squeeze-bang-blow.
Interesting idea. I'd think CO2 might work as long as the temp of the gas going in isn't cold enough to flat out crack or shatter things. I'd be interested to run some tests. Any other gas that can deploy from a compressed state quickly enough without drastically lowering the temp of the engine could work I would think, but the only gas I know of that doesn't drop in temp, is acetylene. That one likes to increase in temperature and probably wouldn't help much in a runaway, depending on your definition of "help".
Damn Boyles law of gases.