Henry Spencer wrote on 011113: > Remember that for a gas gun, you want deflagration... but pressurized GOX/GH2 is all too likely to detonate instead. Maybe if the mixture ratio was way off center? GH2/GO2 mix was used in a massive chamber horizontal gas gun with a small caliber barrel ±10 m long. To avoid explosive compression of He or GH2 "light gas". Off centre? Non-stoichiometric you mean; mix ratio was stoichiometric IIRC. Deflagration or detonation who cares? It worked. Years ago I sent pictures of that eighties lab contraption in Moscow to AR. Twice. The aluminum projectiles in part melted when hitting the atmosphere beyond the vacuum barrel. Go figure. Too old a website for Google. jd