Projectile forming charg

Projectile-forming charge self-forging fragment ... 

Primadet = mild detonating fuse (USA) 218 primary blast 267 primary explosives 191 267 primer 94 267 primer charge 267 produits de detonation = fumes 145 progressive burnig 158 267 projectile forming (shaped) charge 283... 

Computed Maximum Pressure (CMP). Value of max pressure computed by means of interior ballistic formulas. It will be developed when a new gun of a particular type is fired under standard conditions with a propelling charge which will give to the projectile its rated muzzle velocity Rated Maximum Pressure (RMP). Value of max pressure specified in the proplnt specifications as the upper limit of avg pressure which may be developed by an acceptable proplnt in the form of propelling charges which will impart the specified muzzle velocity to the specified projectile. Normally about 2000psi.above the computed max pressure, subject to determination at the time of development... 

Hurst. Patented in 1898 in the USA. The use of NG in frozen form as bursting charge for projectiles... 

One of the most recent uses for Pb is the addition, in the form of foil or coil of wire, to propint pdr as a decoppering agent for the bore of the gun. The Pb is placed between the pro-pint charge and the projectile... 

The idea of separating, by a metallic sheath, die bursting charge of a projectile from the booster belongs to Sir R. Robertson and dates to die time of WW1. It was done in order to eliminate the possibility of premature explns caused by set-back. In its original form, the device was intended to detonate an insensitive expl such as Amatol. It consisted of a strong steel tube, 3 inches long and J4 inch (hick, screwed into the... 

The Germans used anti-flash charges containing potassium chloride in their cannon propellants. The charges, in bags of artificial silk or cotton cloth, were loaded between the base of the projectile and the propellant. Obviously, all the additions described above increased the smoke formed when the rounds were fired. 

Fig. 7.6 Comparison between a shaped charge (a) and an explosively formed projectile (b).

Fig. 7.7 Schematic design of a charge to generate an explosively formed projectile (EFP).

Fig. 7.8 Influence of the standoff distance on the perforation depth for shaped charges (SC) and explosively formed projectiles (EFP).

A fragmenting warhead is a special type of shaped charge or device that explosively forms projectiles. In such a device many EFPs of the shape of cones or cups are combined into one multi-projectile warhead (Fig. 7.9). Such devices which send out the projectiles in a cylindrical geometry are particularly suitable for targets in the air. 

Tetryl forms yellow crystals with a melting point of 132 Celsius—it explodes when heated to 180 Celsius. It is insoluble in water, but soluble in alcohol, benzene, and acetic acid. Solutions of tetryl in solvents should be stored in a dark place, protected from light—as they will slowly deteriorate on standing—normally tetryl is stored dry or moistened with kerosene or water. Solutions of tetryl or even the dry solid upon the skin and teeth causes yellow staining. Tetryl is a very powerful explosive used primarily in detonators as a booster for artillery, mortar, and projectile fuses. Tetryl is a standard military initiating explosive (booster). Tetryl boosters are common in shape charges, mines, mortars, artillery shells, rockets, anti-tank munitions, and missiles. 

The charge is taken at the ordinary temperature, which we shall call TqI at the moment it explodes, the temperature of the products formed increases enormously then these products expand, expelling the projectile, and in this expansion they are cooled the temperature and pressure of these products at the moment when the base of the pipjectile leaves the mouth of the piece depend evidently upon the peculiarities of the combustion of the powder and of the path of the passage of the. bullet through the bore of the piece. Denote by 1 this final state. The mechanical effect produced is... 

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