Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
But why can't you meter oxygen? Then you could just inject the C3H8 and O2, load the projectile and shoot, repeat, repeat, repeat....?
And how would this be any different than a hybrid? You are just adding extra O2 to be able to burn extra fuel.
Has anyone in this forum actualy gotten hurt from an explding chamber because of fuel reasons 
