A '''Railgun''' is a type of [[artillery]] that fires projectiles at [[supersonic]] speeds by launching them using [[electromagnetism]] instead of gunpowder or some other chemical propellant. Current expectations for railguns are a 400-mile (643.6 kilometer) range and an impact velocity in excess of [[Mach]] 8. | A '''Railgun''' is a type of [[artillery]] that fires projectiles at [[supersonic]] speeds by launching them using [[electromagnetism]] instead of gunpowder or some other chemical propellant. Current expectations for railguns are a 400-mile (643.6 kilometer) range and an impact velocity in excess of [[Mach]] 8. |