What is the difference between a light-gas gun and a regular gun?
A light gas-gun uses a gun powder charge to shoot a plastic (polyethylene) piston into a tube filled with hydrogen. As the piston travels down the tube the hydrogen is compressed, hence raising it’s pressure and temperature. The resultant high pressure and temperature hydrogen is used to accelerate the projectile down and out the gun barrel. Light-gas guns can achieve velocities up to 7 times faster than most typical guns.
