A coil-gun uses pulsed currents of large magnitude to propel ferrous projectiles at high speeds. The various problems associated with high currents and magnetic fields are discussed, as well as the components and design of my experimental coil-gun. I tested the coil-gun at various charge voltages and different projectile sizes, then calculated the efficiency of the coil-gun with measured values...

Abstract To predict the chamber pressure of positions corresponding to strain data gun barrel’ outside walls, this study measures and different in a recoilless gun, proposes calculation method which is based on measurement cylinder walls using single-layer thin-walled theory plane strain-elastic stress solution for multi-layer orthotropic cylinders. Experimental results showed that deformation ...

We present an unusual case of chlorobenzylidenemalonitrile (CS) tear-gas exposure from the unwitting discharge of a personal-protection handgun loaded with CS gas. The gun was in a bag of toys purchased from a local thrift store and was discharged by a child. The responding paramedic presumptively identified the substance as CS based solely on personal experience. This recognition led to subopt...

Abstract The high temperature and pressure gas in the combustion chamber pushes projectile towards muzzle during firing of gun. belt is squeezed deformed by forcing cone. In order to study dynamic engraving characteristics projectile, a short-barrel gun launcher was designed for experimental research. dynamics base curves process were obtained. Based on loading conditions, J-C elastic-plastic m...

BACKGROUND Penetrating neck injuries result from missiles and stab wounds. A gas pistol is a non-lethal weapon for self-defence. CASE REPORT We present a case where the use of a modified gun led to multiple injuries in a single shot. Four projectiles were embedded in the neck, one in the larynx and three in the cervical spine. The first was removed via a combined external and endoscopic appro...

Abstract Aiming at the problem of accurate latch opening control expansion wave gun automatic gun, mathematical model time is established, travel curve projectile and wave, velocity are studied, occurrence close to simulated analyzed; The time-space evolution relationship between local sound velocity, gas simulated; average pressure chamber resultant force two launch modes compared analyzed. Af...