FR2756374A1 - KINETIC PROJECTILE WITH INCREASED LATERAL EFFECT - Google Patents

Abstract

The invention relates to a kinetic armor-piercing projectile comprising an elongated body, characterized in that the body contains a tube (1) made of a material with terminal ballistic efficiency and axially containing a material (2) capable, under pressure. due to perforation, accelerate the surrounding material.

Description

The invention relates to a piercing projectile with an effective kinetic effect.

by

  compared to targets with protective armor.

  The shields have been the subject of significant technological progress. They cover a large part of vehicles, planes, helicopters and superstructures of military ships; they are intended to reduce the effectiveness of munitions. Shields are of two types: passive or reactive. The shielding is passive when it opposes the projectiles by consumption and / or degradation thereof. It is reactive when it reacts to the attack of the projectile by causing the

  detonation of an explosive which it contains in one of its layers.

  o0 Reactive shielding is conventionally obtained by juxtaposition of numerous so-called reactive modules. If it covers a passive shielding, we speak of reactive shielding. Each reactive shielding module consists of two thin steel plates between which a layer of explosive is sandwiched. The initiation of the explosive reactive armor is ensured by the attack

  by the kinetic effect projectile, or by external ignition (sensor, etc.).

  Faced with advanced passive and reactive armor technologies, it is necessary to have projectiles capable of crossing armor with

marked side effects.

  One of the solutions for obtaining specific lateral effects is described in patent FR 2 629 581 and consists in providing a mechanical device making it possible to eject laterally from a projectile perforating secondary projectiles such as bars upon impact on the target and during the

perforation of the latter.

  This fairly efficient system has some drawbacks, however, because of its complex technology, excess mass and considerable bulk, at high cost. In addition, for design reasons, only a part

  relatively small projectile can be accelerated this way.

  The object of the invention is therefore to propose a high-performance projectile with respect to passive and reactive armor, which overcomes the drawbacks of known projectiles. The subject of the invention is a kinetic effect perforating projectile comprising an elongated body, characterized in that the body encloses a tube made of a material with terminal ballistic efficiency and containing axially a capable material, under the pressure due to the perforation , to accelerate

the material that surrounds it.

  The tube is located either in the center, at the front, or at the back of the projectile.

  Preferably, the tube is made of steel or heavy metal.

  In an alternative embodiment, the tube is completely filled with utm material capable, under the pressure due to the perforation, to accelerate the material which surrounds it. In another alternative embodiment, the tube is partly filled with a material capable, under the pressure due to the perforation, of accelerating the material which surrounds it, and partly with a material with terminal ballistics efficiency, in one combination o the two materials are arranged axially without mixing

in two successive layers.

  The association of the two materials can be repeated with a number of

time.

  The material capable, under the pressure due to perforation, of accelerating the

  surrounding material can be glass or ceramic.

  The terminal ballistic effect material combined with the previous one can be

heavy steel or mun metal.

  In a particular embodiment of the invention, the tube is made of the same material with a terminal ballistic effect as that with which it is filled,

  and forms with it a unique body.

  The projectile is aerodynamically stabilized by tail or in

rotation by gyroscopic effect.

  Other characteristics and advantages of the invention will become apparent on

  reading of the following description of preferred embodiments given to

  illustrative and non-limiting title, and appended figures, among which - Figure 1 shows a projectile with ammunition according to the invention centered in the projectile; FIG. 2 represents a projectile with ammunition according to the invention located at the front of the projectile; FIG. 3 represents a projectile with ammunition according to the invention

  located at the rear of the projectile.

  FIG. 4 represents a projectile with ammunition according to the invention of a combined type; FIG. 5 represents particular modes a, b, c of embodiment of tme

  ammunition according to the invention according to longitudinal sections.

  FIG. 1 represents a projectile comprising an elongated body aerodynamically stabilized by empennage, the front part of which ensures perforation

  a target to destroy with a desired depth of penetration.

  The projectile contains a central tube 1 made of a material with terminal ballistics efficiency such as steel or a heavy metal. The tube 1 is visible in section in FIG. 5a; it is filled with a material 2 similar to a munition because it is capable, under the very high pressure which occurs during penetration and perforation, of accelerating the material which surrounds him. The material 2 can be completely based on glass or ceramic. Glass and ceramics are already used in effective shielding against

shaped charges.

  The material 2 can be only partially based on glass or ceramic and be associated with another material. In the latter case shown in FIG. 5b, there is added to it inside the tube 1 a material 3 with particularly high terminal ballistics efficiency, such as steel or a heavy metal. The tube is therefore filled axially with two layers of filling materials deposited successively without mixing. In FIG. 5c, the tube 1 is made of the same material as the layer 3 and forms with the latter a single body. FIG. 4 shows the example of a projectile which comprises a tube filled with associated filling materials in the manner shown in FIG. B. A first filling material 2 is followed by a second filling material 3, which is itself followed by the repeated association of the two materials. The repetition of the association of the two materials can be renewed

  provided a number of times for the purpose of a reinforced attack.

  In FIG. 2, the tube 1 containing the filling material or materials is located in the front part of the projectile to obtain particular effects on impact. In FIG. 3, the tube 1 is placed in the rear part of the projectile or mainly in the region of the base in order to reinforce the effects after

target perforation.

  The projectiles according to the invention cause extended craters after

  penetrating an armored target.

  The enlargement of the craters increases with the depth of penetration; in particular in the case of targets constituted by the superposition of two steel plates, the second plate has a wider crater than the first as well as a crown of widely spread lateral impacts formed by fragments of projectile. For light targets, it may be advantageous to use projectiles

  aerodynamically stabilized or stabilized in rotation by gyroscopic effect.

Claims (11)

  1.A kinetic effect piercing projectile comprising an elongated body, characterized in that the body contains a tube (1) made of a material with terminal ballistics efficiency and containing axially one capable material (2),   under pressure due to perforation, to accelerate the material that surrounds it.   2. Projectile according to claim 1, characterized in that the tube (1) is located in the center of the projectile.   3. Projectile according to claim 1, characterized in that the tube (1) is located at the front of the projectile.   1 5 4.Projectile according to claim 1, characterized in that the tube (l) is located at the rear of the projectile.   5. Projectile according to any of claims 1 to 4, characterized in that the   tube (1) is made of steel or heavy metal.   6. Projectile according to claim 1 to 5, characterized in that the   tube (1) is completely filled with the material (2) capable, under the pressure due to the   perforation, to accelerate the material that surrounds it.   7. Projectile according to any of claims 1 to 5, characterized in that the   tube (1) is partly filled with material (2) capable, under the pressure due to perforation, of accelerating the material which surrounds it, and partly with mun material with terminal ballistics efficiency, in association street both materials are   arranged axially without mixing in two successive layers.   8.Projectile, characterized in that the tube (1) is filled by the association   of the two materials according to claim 7, repeated at least once.   9. Projectile according to the utme of claims 6 to 8, characterized in that the   material (2) capable, under pressure due to perforation, of accelerating the material   that surrounds it is glass or ceramic.   10. Projectile according to one of claims 7 to 9, characterized in that the   Terminal ballistics material is steel or a heavy metal.   11. Projectile according to one of claims 7 to 10, characterized in that   the tube (1) is made of the same material with a terminal ballistic effect as   the one with which it is filled, and forms with it a single body.   12.Projectile according to one of claims 1 to 11, characterized in that   the tube (1) is aerodynamically stabilized by tailplane.   13. Projectile according to one of claims 1 to 11, characterized in that   the tube (1) is stabilized in rotation by gyroscopic effect.