Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Thanks Gil. That's one possible mix; the mix used at Coolspring Power Museum contains propane and I can get the exact formula if anyone is interested (just send me a PM). The problem is you can't pressurize this mixture over 100 psi or the propane will condense and the mix becomes adversely affected. If I'm not mistaken these gasses are kept in separate tanks and mixed in the correct proportions as they enter the engines' fuel stream at Coolspring. Propane that you buy at your local store is stored as a liquid at 100-200 psi. So the amount of this gas mix stored in one of these tanks at less than 100 psi won't last long even for a tiny engine like mine.