RU2206053C1 - Artillery cartridge - Google Patents

Abstract

FIELD: ammunition for anti-infantry automatic grenade launchers. SUBSTANCE: invention can be utilized in manufacture of artillery cartridges for increased shooting range. Cartridge case is fitted with percussion cap. External space of cartridge is confined between internal surface of case and external surface of part of projectile positioned in case which is connected to charge chamber with use of lateral holes. Part of projectile behind band is cylindrical-conical and is extended to entire depth of space of case, to positive stop against case bottom. Propelling charge of cartridge is positioned in bottom recess having depth of 0.4-1.0 caliber and diameter 0.7-0.8 caliber. Volume of external space equals to 0.04- 0.06 volume of bottom recess. Total area of holes communicating external space to bottom recess amounts to 0.04-0.06 area of inlet hole of bottom recess. EFFECT: such implementation of cartridge enables shooting range of projectile to be increased noticeably with preservation of recoil pulse. 1 dwg

Description

 The invention relates to ammunition for anti-personnel automatic grenade launchers and can be used in the manufacture of artillery cartridges for firing with increased range.

 Known artillery unitary loading cartridge containing a sleeve with a primer-igniter and propellant charge. On the bottom cylindrical part of the projectile, longitudinal grooves are made for the release of compressed air during assembly. The projectile is mounted on a ledge of the inner surface of the liner, and below on the other ledge is a diaphragm that is closed on both sides by membranes that are clamped around the perimeter by means of a bent edge of the annular notch of the projection of the shell-based [1].

 A cartridge is known that contains a shell equipped with an igniter capsule, a shell with a bottom recess secured in the sleeve. The propellant charge is placed in the charging chamber formed by the internal cavity of the sleeve and the bottom notch in the shell. Between the inner surface of the sleeve and the outer surface of the part of the projectile placed in the sleeve, an external cavity is formed, which is connected through the transverse holes to the charging chamber [2].

 The disadvantage of these samples of cartridges is the insufficient maximum range of the projectile.

 The objective of the invention is to increase the maximum range of the projectile while maintaining the recoil momentum.

The technical result is achieved by the fact that in an artillery cartridge containing a shell equipped with an igniter capsule, a shell with a bottom recess secured in the sleeve, a propelling charge placed in the charging chamber, an external cavity enclosed between the inner surface of the sleeve and the outer surface of the shell portion located in the sleeve which is connected to the charging chamber by transverse openings:
- zapoyasko part of the projectile is cylindrical and elongated to the entire depth of the cavity of the sleeve until it stops at the bottom of the sleeve;
- propelling charge placed in the bottom recess of the projectile;
- the bottom recess is made with a depth of 0.4 ... 1.0 caliber and an outlet diameter of 0.7 ... 0.8 caliber;
- the volume of the external cavity is 0.04 ... 0.06 of the volume of the bottom excavation in the shell;
- the total area of the holes connecting the outer cavity with the bottom recess is 0.04. ..0.06 of the area of the outlet opening of the bottom recess.

 The invention is illustrated in the drawing, which shows a General view of part of the artillery cartridge with a partial section.

 The artillery cartridge contains a cartridge case equipped with an igniter capsule 1. A projectile 2 with a bottom recess is fixed therein. The projectile part 4 is cylindrical conical 5. The cylindrical part of the projectile is extended to the entire depth of the cartridge case until it stops at its bottom 6. Throwing charge 7 is placed in the bottom recess . The bottom excavation is made with a depth of 8, equal to 0.4 ... 1.0 caliber, and a diameter of the outlet 9, comprising 0.7 ... 0.8 caliber from the condition of placing a propellant charge in it with a density not exceeding the gravitational density of the powder . Performing a depth of the bottom excavation of less than 0.4 caliber is ineffective in terms of increasing the range of the projectile. The outer cavity 10, enclosed between the outer surface of the cusp part of the projectile 4 and the inner surface of the sleeve, is made a volume equal to 0.04. . .0.06 of the volume of the bottom recess of the projectile, and is connected by transverse holes 11 with the bottom recess of the projectile 3. The area of the holes connecting the external cavity with the bottom recess of the projectile is 0.04 ... 0.06 of the area of the outlet opening of the bottom recess.

 The selected value of the volume of the external cavity and the total cross-sectional area of the holes connecting the external cavity with the bottom recess provide equalization of the pressure of the powder gases in the charging chamber and in the internal cavity in the initial period of the shot, which eliminates the possibility of deformation of the thin-walled (near the bottom recess) part of the projectile.

 When initiating the igniter capsule, a shot occurs.

 Technical solutions incorporated in the design of the artillery cartridge, according to the invention, allowed for a subsonic speed of the projectile to increase its flight range by 25% compared with a standard cartridge model while maintaining the recoil momentum.

Sources of information
1. RF patent 2087837, publ. 08/20/97.

 2. Patent EPO 0238155, publ. 08/23/97.

Claims (1)

 An artillery cartridge containing a shell equipped with an igniter capsule, a shell mounted in the shell, made with a shoulder portion and a bottom recess, a propellant charge placed in the charging chamber, an external cavity enclosed between the inner surface of the shell and the outer surface of the shell portion located in the shell, which connected to the charging chamber by transverse openings, characterized in that the shoulder part of the projectile is cylindrical and elongated to the entire depth of the sleeve cavity until it stops at the bottom of the shells s, a propellant charge placed in the bottom recess formed depth of 0.4 ... 1.0 and gauge diameter of 0.7 ... 0.8 caliber, the volume of the outer cavity is configured to be 0.04. . .0.06 of the volume of the bottom recess, and the total area of the holes connecting the external cavity with the bottom recess is 0.04 ... 0.06 of the area of the outlet opening of the bottom recess.