FR2472168A1 - Outer casing for projectile - includes auxiliary charge to boost speed before impact to ensure penetration of target - Google Patents

Abstract

The projectile comprises a hollow body surrounded at the front by a tapering ring, with an axial hole closed at the rear by a threaded plug. An inner projectile is carried in the hollow casing formed of a body and end. The inner projectile includes a main explosive charge and detonator. A fuse ensures that the projectile is exploded on contact with the target. In the chamber at the rear of the outer casing is a further charge of powder which may be fired by a fuse controlled by a target proximity detector. When the main body of the projectile gets near its tarqet, the charge is fired to give the inner projectile additional speed, thus ensuring penetration of the target.

Description

 The present invention relates to a body of a vehicle such as for example a missile, projectile, rocket, bomb, etc. organized like a launching cannon for sub-projectiles, in particular piercing and explosives. The "barrel-body of machine1 'communicates an additional speed of impact to the sub-projectile, therefore a better power of penetration and a better efficiency on the objective, the firing of the said" barrel-body of machine " being triggered according to the invention by an appropriate detector.

 The invention applies to all carrier vehicles: missile, projectile, rocket, bomb, etc. The example treated below relates to an airplane bomb, this example not being limiting the invention being able to apply to all other devices without departing from its scope.

 Non-self-propelled or poorly self-propelling armor-piercing bombs must have a high impact speed to penetrate the object to be destroyed.

 When the firing range is large, the air resistance brakes said bomb and it often no longer has the necessary speed, especially with regard to guided or planing bombs, gravity no longer intervening in the evolution speed on trajectory.

The present invention proposes to provide a solution to this problem of high impact speed, guaranteeing or providing significant penetration because necessary, in the objective.
The body of the bomb, according to the invention, is characterized in that it is organized like a barrel: it has, according to the invention, an axial bore, closed at the rear by a plug forming a cylinder head. This bore contains a sub-caliber sub-projectile, on the one hand, and a chamber compartment, on the other hand, which contains a charge of propellant powder, which ensures the launch of said sub-projectile to provide it with a speed d additional impact.

 According to the invention and upon arrival on the objective, a proximity rocket or any other detector means such as a contact antenna verifies the presence and the distance of said objective.

 The charge of powder, provided according to the invention in the chamber of the barrel-barrel, is then ignited and the sub-projectile, according to the invention, is launched with an additional speed towards the front of the body of bomb forming barrel according to l 'invention.

 This launch speed is added to the remaining speed of the bomb and the sub-projectile thus arrives at the objective with a sufficient impact speed and in any case greater to penetrate said objective under conditions ensuring its destruction.

 the various characteristics and advantages of the invention will emerge from the description below. It should be remembered, however, that this is only an example and that all other construction methods, proportions, shapes, layout, etc.

can also be used without departing from the scope of the invention.

 In the course of this description, reference is made to the appended drawing, the single figure of which is a view in longitudinal section of the bomb body forming a cannon equipped with the sub-projectile according to the invention.

 The barrel bomb body 1, hooped at the front by a ring 2, has an axial bore 3, terminated at the rear by a thread 4. It comprises, for example, wells 5 for the carrying rings and a housing 6 receiving the winding drums of armament wires passing through the tubes 7. A fairing 8 gives the assembly an aerodynamic profile.

 A plug forming a cylinder head 9 is screwed onto the body 1 by a thread 4. An O-ring 10 provides sealing.

 the sub-projectile 11, according to the invention, consists of the body 12 and the hollow base 13. An O-ring 14 seals it. A forcing belt 15, mounted between the body 12 and the base 13 of the sub-projectile It holds said sub-projectile It in place in the barrel bomb 1 according to 1 t invention by pressing on the shoulder 3 'at the rear of bore 3.

 the loading of the supra-proåectile It consists of a main explosive 16 and a primer 17. The rocket 18, mounted in the base 13 of the sub-projectile 11 fires during the impact on the goal. Its arming is caused, for example, by gases from the propellant charge or by the acceleration to which these gases subject the sub-projectile.

 In the chamber 19, arranged between the hollow base 13 of the sub-projectile II and the plug forming the breech 9 screwed onto the bomb barrel body 1, is placed according to the invention, the charge of propellant powder 19 ′. It is fired by the rocket 20 mounted on the cylinder head plug 9.

 When the command to ignite the propellant charge 19 ′ is controlled by a proximity rocket 21, for example of the opto-electronic type, this rocket 21 can be placed outside the bomb body 1, at 1 'rear of the ring 2. A recess 2' in said ring 2 allows, in this case, the passage, according to the invention, light rays.

 Without departing from the scope of the invention, the volume between the bomb barrel body 1 and the fairing 8 can be organized as a complementary peripheral charge capable of adding lateral effects to the axial effects of the sub-projectile 11.

Thus, for example, this additional charge will consist of a mass of explosive 22 enveloped by a wall generating prepared fragmented flakes 23. According to this example of the invention, the detonation of the mass of explosive 22 can be initiated, for example, by propellant gases through the lights 24 and the pyrotechnic relay 25.

 Of course, this invention is not limited to the example of embodiment and application described here, but it encompasses all the variants, in particular that which consists in providing several sub-projectiles.

Claims (11)

 1 - Body of a device such as, in particular, missile, projectile, bomb, rocket, ... characterized in that it is organized as a launcher cannon for sub-calibrated sub-projectiles, in particular explosives, piercing, this organization comprising an axial bore (3) containing, on the one hand, at least one sub-projectile (11), and, on the other hand, at least one chamber (19) closed by a plug forming a breech (9) and containing a charge propellant powder (19 t) which launches said sub-projectile to provide it with an additional impact speed.  2 - Machine gun body according to the preceding claim, characterized in that the sub-projectile has a hollow base (13) cooperating with the breech (9) of said gun body to close the chamber (19) containing the propellant charge (19t ).  3 - Machine gun body according to one of the preceding claims, characterized in that the sub-projectile (11) is held in place by a forcing belt (screw)  4 - Machine gun body according to any one of the preceding claims, characterized in that it comprises an aerodynamic fairing (8) surrounding said body peripherally, this fairing being associated with a front ring (2).  5 - Machine gun body according to any one of the preceding claims, characterized in that the firing of the propellant charge (19 ') is triggered by a detector, such as a proximity rocket, preferably of the optoelectronic type .  6 - Machine gun body according to any one of the preceding claims, characterized in that it comprises, on its periphery, optoelectronic proximity detectors (21), placed at the rear of a support ring (2) in which are provided machining (2 ') allowing the passage of light rays from the detector.  7 - Machine gun body according to any one of the preceding claims, characterized in that the firing of the propellant charge is triggered by a contact antenna.  8 - Machine gun body according to any one of the preceding claims, characterized in that the pyrotechnic rocket (18) of the sub-projectile (11) is armed either directly, by the pressure of the propellant gases, or indirectly, by the acceleration to which these gases subject said sub-projectile.  9 - Machine gun body according to any one of the preceding claims, characterized in that it comprises an additional explosive charge (22), placed between the body (1) proper, forming a launcher, and its peripheral fairing (8 ).  10 - Machine gun body according to claim 9, characterized in that the additional explosive charge (22) is coated with a generatric wall of splinters (23), in particular with prepared fragmentation.  11 - Machine gun body according to one of claims 9 etlO, characterized in that the additional explosive charge (22) is initiated by the propellant gases of the sub-projectile, through lights (24) formed in the gun body (1) and a pyrotechnic relay (25).