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EP0471617A1 - Sealing strip for arrow-type projectile - Google Patents

Sealing strip for arrow-type projectile Download PDF

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Publication number
EP0471617A1
EP0471617A1 EP91402230A EP91402230A EP0471617A1 EP 0471617 A1 EP0471617 A1 EP 0471617A1 EP 91402230 A EP91402230 A EP 91402230A EP 91402230 A EP91402230 A EP 91402230A EP 0471617 A1 EP0471617 A1 EP 0471617A1
Authority
EP
European Patent Office
Prior art keywords
belt
holes
zone
seal
shoe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91402230A
Other languages
German (de)
French (fr)
Other versions
EP0471617B1 (en
Inventor
Marc Berville
Laurent Queille
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giat Industries SA
Original Assignee
Giat Industries SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP0471617A1 publication Critical patent/EP0471617A1/en
Application granted granted Critical
Publication of EP0471617B1 publication Critical patent/EP0471617B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/067—Sealing aspects in sabots, e.g. sealing between individual segments of the sabots or sealing between the outer surface of the sabot and the inner surface of the barrel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/061—Sabots for long rod fin stabilised kinetic energy projectiles, i.e. multisegment sabots attached midway on the projectile

Definitions

  • the field of the present invention is that of sealing belts for arrow projectiles.
  • An arrow projectile is composed in a known manner of an under-calibrated penetrator secured to a caliber shoe.
  • the sabot is made up of several segments (generally three), which separate and release the indenter at the exit of the barrel of the weapon under the action of aerodynamic forces.
  • this function is fulfilled by the belt, and on the other hand between the different segments of the sabot this function is fulfilled by a elastomeric seal deposited on the shoe and tearing during the separation of the segments.
  • Patent DE2537116 describes a sub-calibrated projectile, the shoe of which has a one-piece rear part. The latter achieves both gas tightness and support of the belt. However, the breaking characteristics of such a shoe are difficult to master and such a solution cannot be transposed to arrow munitions having a rear seal made of elastomer.
  • Patent DE3332675 proposes to provide a seal which hooks at a rear shoulder of the shoe, but such a configuration does not prevent gas leakage in the event of cracking of the belt.
  • the invention relates to a sealing belt for a shoe of an arrow projectile which is characterized in that that it comprises on the one hand a substantially annular rear zone on which comes into contact, when the belt is placed in an annular groove of the shoe, a seal integral with the shoe, and on the other hand means ensuring its mechanical connection by form matching with the material of the joint.
  • a first advantage of such a configuration is that the seal, by coming into contact with a rear annular zone of the belt, will isolate the latter from the propellant gases and ensure sealing in the event of cracking of the belt.
  • Another advantage is that the means ensuring the mechanical joining by matching the shape of the belt with the material constituting the seal will prevent the seal from being torn off during the course of the projectile in the barrel of the weapon.
  • the securing means comprise recesses regularly distributed over the periphery of the belt, produced in a substantially radial direction of the latter and opening out at the rear zone, the shape of these recesses being such that it presents from the rear zone at least one narrowed zone followed by an enlarged zone.
  • the recesses may be substantially cylindrical holes whose axis is disposed at a distance from the rear zone which is less than their radius.
  • the securing means comprise appreciably cylindrical bores, regularly distributed and opening out at the rear zone, the axis of these bores is inclined relative to that of the belt, and advantageously it intersects the axis of the belt in front of the rear zone relative to the projectile.
  • the belt comprises at the rear zone a substantially cylindrical extension which is coaxial with it and the securing means comprise holes made on the extension in a substantially radial direction and regularly distributed over at least one circumference of the extension.
  • the cylindrical extension comprises a fracture initiator disposed behind the bores, which can be constituted by a thinned zone of the extension on which holes are made in a substantially radial direction and regularly distributed over a circumference.
  • the belt according to this third embodiment is particularly suitable for carrying on its cylindrical extension a ring intended to secure the projectile with a socket, in this case the holes open out between the annular zone of the belt and the ring, and the joint seal fills the space between the ring and the annular area.
  • Figure 1 shows schematically in half-view an arrow projectile equipped with a belt according to a first embodiment.
  • Figure 2 is a view of the previous one in direction F.
  • Figures 3A, 3B and 3C are views of the belt alone.
  • FIG. 4 represents a variant of the previous embodiment.
  • Figures 5A and 5B show the belt alone according to a second embodiment of the invention.
  • FIG. 6 schematically represents an arrow projectile equipped with a belt according to a third embodiment.
  • Figure 7 is a view of the belt of Figure 6 shown alone.
  • Figure 8 is a variant of this third embodiment of the belt.
  • an arrow projectile 1 is conventionally constituted by a shoe 2, comprising several segments, generally three, and in which is disposed an indenter 3 of heavy material, for example depleted uranium.
  • the different segments of the sabot are held by a front hoop 4 and a belt 5 which is intended to seal between the barrel of the weapon and the projectile during firing.
  • Front hoop and belt are arranged in annular grooves 9 and 10 made on the shoe, and are of the tube caliber, their installation is carried out by injection directly on the shoe arranged in a suitable mold.
  • a rear seal 6 provides sealing between the joint planes of the shoe segments, and between the shoe and the indenter.
  • This seal is for example obtained by injection of an elastomer (such as a polymer vulcanizable at high temperature) on the assembled shoe and placed in a suitable mold.
  • an elastomer such as a polymer vulcanizable at high temperature
  • the seal includes an outer lip 7 slightly over-calibrated (of the order of 121 mm for a caliber of 120 mm), and it comes into contact with the belt 5 at a rear annular zone 8 thereof.
  • the seal 6 could possibly not have a lip but in this case the external diameter of the seal will nevertheless be close to the external diameter of the belt and therefore therefore greater than the caliber of the barrel of the weapon. The external part of the seal will therefore be in contact with the internal surface of the barrel of the weapon.
  • the contact of the seal at the level of the annular zone 8 makes it possible to avoid any leakage of propellant gases between the seal and the belt and also prevents leaks from propagating between the barrel of the weapon and the belt in the event that would occur cracking of the latter.
  • annular area 8 is carried by an annular flange 11 and has recesses 12 regularly distributed over its periphery.
  • These recesses are cylindrical holes 12, produced in a substantially radial direction of the belt, and passing through the flange 11.
  • the belt here has nine holes 12 regularly distributed.
  • a number of holes which is preferably a multiple of the number of shoe segments, and we mean by regular distribution a distribution ensuring a position of the center of gravity of the belt substantially on its axis 15 (axis of the projectile).
  • the axis of these holes is arranged at a distance d (FIG. 3B) which is less than the radius of the holes, thus the holes open out at the level of the rear annular zone 8.
  • Such an arrangement makes it possible to obtain recesses which have, from the rear zone 8 at least one narrowed zone (here the opening of the holes on the rear zone 8) followed by an enlarged zone (the diameter of the holes).
  • the material constituting the seal will, during its injection, penetrate into the recesses, and the narrowing of the latter will make it possible to mechanically retain the seal.
  • the recesses then constitute a means ensuring the mechanical joining by matching the shape of the belt with the material of which the seal is made.
  • FIG. 4 shows, in uncut external view, an alternative embodiment in which the recesses 12 which are produced on the collar in a radial direction have a trapezoidal section.
  • FIGS. 5A and 5B show a second embodiment of the invention in which the belt 5 carries, at the level of the annular zone 8, substantially cylindrical bores 13, and regularly distributed (here nine bores).
  • the axes 14 of these holes are inclined relative to the axis 15 of the belt 5 (and therefore to the axis of the projectile).
  • the axes 14 are inclined so that they intersect the axis of the belt in front of the annular zone 8.
  • the material of the seal will penetrate these holes which will constitute a means of securing the seal and the belt, the resistance of this means is ensured by the inclination of the axes of the holes.
  • FIG. 6 shows a third embodiment, in which the belt comprises at the rear zone 8 a cylindrical extension 16 which is coaxial with it and whose diameter is less than the gauge.
  • This extension carries bores 17, regularly distributed, produced on a circumference of the extension in a substantially radial direction and in the vicinity of the rear annular zone 8.
  • the holes are cylindrical and tangent to the annular zone 8, but any other shape would be possible.
  • the holes thus constitute the means for securing the belt and the seal.
  • the extension 16 can advantageously be used to attach a connecting ring 19 to the projectile which will allow the assembled projectile to be secured with a socket containing the propellant charge (not shown here).
  • a connecting ring 19 is described in patent application FR2620214.
  • first fixing means not shown here which will be, for example, rivets arranged in holes 20 regularly distributed over a circumference of the extension and coming opposite other holes carried by the ring 19.
  • the ring is fixed to the sleeve by a second fixing means of the type described in patent application FR2620214 (for example rivets and an intermediate piece).
  • the fixing means will be dimensioned so that the rupture of the second means occurs under the effect of the pressure of the propellant gases, the first means not breaking.
  • the holes 17 will also be dimensioned in such a way that the rupture of the extension 16 occurs, where appropriate, preferably at the level of the studs 20 and the first means of fixing the ring 19.
  • the seal fills the entire space between the ring 19 and the annular zone 8 of the belt and it is pinched between these two elements, it then acts as a shock absorber of the vibrations that the socket transmits to the projectile through the ring, thereby reducing the mechanical stresses at the projectile ring connection and increasing the resistance and the service life of this connection.
  • FIG. 8 shows an alternative embodiment in which the holes 17 are distributed over a circumference situated in a radial plane 21.
  • Holes 24 are distributed over a circumference situated in another radial plane 22.
  • the extension 16 also has a thinned zone 23 at the holes 17 and the holes 24.
  • the material constituting the seal 6 only penetrates into the holes 17 located in the plane 21, the holes 24 located in the plane 22 are free.
  • the thinned zone 23 constitutes a primer for rupture allowing the separation of the belt 5 from the ring 19.
  • the rupture will occur at the level of the plane 22 in which are the holes 24 which are not filled with the material of the joint, that is to say behind the holes 17 which will continue to fulfill their function of securing the joint and the belt .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasket Seals (AREA)
  • Sealing Material Composition (AREA)
  • Package Frames And Binding Bands (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Golf Clubs (AREA)
  • Adhesive Tapes (AREA)
  • Decoration Of Textiles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

The technical sector of the invention is that of sealing bands for arrow-type munitions. The sealing band (5) according to the invention is arranged in an annular groove (9) of a sabot (2) of an arrow-type projectile, and is characterized in that it comprises a substantially annular rear zone (8) on which, when the band (5) is positioned in the groove, comes into contact a seal (6) joined to the sabot, and in that it comprises means (12, 13, 17) ensuring its mechanical joining, due to similarity of shape, with the material forming the seal (6). Application to the field of large-caliber munitions.

Description

Le domaine de la présente invention est celui des ceintures d'étanchéité pour projectiles flèches.The field of the present invention is that of sealing belts for arrow projectiles.

Un projectile flèche est composé de façon connue d'un pénétrateur sous-calibré solidaire d'un sabot au calibre.An arrow projectile is composed in a known manner of an under-calibrated penetrator secured to a caliber shoe.

Le sabot est constitué de plusieurs segments (généralemernt trois), qui se séparent et libèrent le pénétrateur à la sortie du tube de l'arme sous l'action des efforts aérodynamiques.The sabot is made up of several segments (generally three), which separate and release the indenter at the exit of the barrel of the weapon under the action of aerodynamic forces.

De tels projectiles posent des problèmes au niveau de la définition des moyens d'étanchéité aux gaz propulsifs.Such projectiles pose problems in terms of the definition of the means of sealing against propellant gases.

En effet il est nécessaire, d'une part de réaliser une étanchéité entre le tube de l'arme et le projectile, cette fonction est remplie par la ceinture, et d'autre part entre les différents segments du sabot cette fonction est remplie par un joint élastomère déposé sur le sabot et se déchirant lors de la séparation des segments.Indeed it is necessary, on the one hand to provide a seal between the barrel of the weapon and the projectile, this function is fulfilled by the belt, and on the other hand between the different segments of the sabot this function is fulfilled by a elastomeric seal deposited on the shoe and tearing during the separation of the segments.

Il se pose alors le problème de l'interface entre la ceinture et le joint lui-même.There then arises the problem of the interface between the belt and the joint itself.

En effet il est toujours possible de voir une fissure apparaître sur la ceinture lors de la montée en pression dans le tube de l'arme, le seul moyen d'empêcher alors une fuite de gaz entre le projectile et le tube est de prévoir un moyen d'étanchéité en arrière de la ceinture.Indeed it is always possible to see a crack appear on the belt during the increase in pressure in the barrel of the weapon, the only way then to prevent a gas leak between the projectile and the barrel is to provide a means seal behind the belt.

Il est possible comme cela est visible sur le brevet EP0049329 de donner au joint un profil périphérique biseauté légèrement surcalibré qui viendra en contact avec le tube de l'arme et assurera l'isolation vis à vis des gaz propulsifs de la partie arrière de la ceinture.It is possible, as can be seen from patent EP0049329, to give the seal a beveled peripheral profile which is slightly over-calibrated and which will come into contact with the barrel of the weapon and will ensure the isolation from the propellant gases of the rear part of the belt. .

Mais une telle disposition est peu fiable car la partie biseautée s'usera fortement au contact du tube de l'arme et des fuites pourront alors se produire.However, such an arrangement is unreliable because the bevelled part will wear heavily in contact with the barrel of the weapon and leaks may then occur.

Le brevet DE2537116 décrit un projectile sous calibré dont le sabot présente une partie arrière monobloc. Cette dernière réalise à la fois l'étanchéité aux gaz et le soutien de la ceinture. Mais les caractéristiques de rupture d'un tel sabot sont délicates à maîtriser et une telle solution n'est pas transposable aux munitions flèches présentant un joint arrière réalisé en élastomère.Patent DE2537116 describes a sub-calibrated projectile, the shoe of which has a one-piece rear part. The latter achieves both gas tightness and support of the belt. However, the breaking characteristics of such a shoe are difficult to master and such a solution cannot be transposed to arrow munitions having a rear seal made of elastomer.

Le brevet DE3332675 propose de prévoir un joint d'étanchéité qui s'accroche au niveau d'un épaulement arrière du sabot, mais une telle configuration ne permet pas d'empêcher les fuites de gaz en cas de fissuration de la ceinture.Patent DE3332675 proposes to provide a seal which hooks at a rear shoulder of the shoe, but such a configuration does not prevent gas leakage in the event of cracking of the belt.

Ce dernier document prévoit la possibilité de réaliser le joint arrière et la ceinture sous forme d'une pièce monobloc, mais une telle solution n'est pas satisfaisante car, avec une telle configuration, une fissure au niveau de la ceinture se propagera également immédiatement au joint arrière.This last document provides for the possibility of making the rear seal and the belt in the form of a single piece, but such a solution is not satisfactory because, with such a configuration, a crack in the belt will also spread immediately to rear seal.

C'est le but de l'invention que de proposer une ceinture pour projectile flèche permettant d'éviter de tels inconvénients, ainsi l'invention a pour objet une ceinture d'étanchéité pour un sabot d'un projectile flèche qui est caractérisée en ce qu'elle comporte d'une part une zone arrière sensiblement annulaire sur laquelle vient en contact, lorsque la ceinture est mise en place dans une gorge annulaire du sabot, un joint d'étanchéité solidaire du sabot, et d'autre part des moyens assurant sa solidarisation mécanique par concordance de forme avec le matériau constitutif du joint.It is the object of the invention to propose a belt for an arrow projectile making it possible to avoid such drawbacks, thus the invention relates to a sealing belt for a shoe of an arrow projectile which is characterized in that that it comprises on the one hand a substantially annular rear zone on which comes into contact, when the belt is placed in an annular groove of the shoe, a seal integral with the shoe, and on the other hand means ensuring its mechanical connection by form matching with the material of the joint.

Un premier avantage d'une telle configuration est que le joint, en venant en contact avec une zone annulaire arrière de la ceinture, isolera cette dernière des gaz propulsifs et assurera l'étanchéité en cas de fissuration de la ceinture.A first advantage of such a configuration is that the seal, by coming into contact with a rear annular zone of the belt, will isolate the latter from the propellant gases and ensure sealing in the event of cracking of the belt.

Un autre avantage est que les moyens assurant la solidarisation mécanique par concordance de forme de la ceinture avec le matériau constitutif du joint vont empêcher l'arrachement du joint lors du parcours du projectile dans le tube de l'arme.Another advantage is that the means ensuring the mechanical joining by matching the shape of the belt with the material constituting the seal will prevent the seal from being torn off during the course of the projectile in the barrel of the weapon.

Selon un premier mode de réalisation, les moyens de solidarisation comprennent des évidements régulièrement répartis sur la périphérie de la ceinture, réalisés suivant une direction sensiblement radiale de cette dernière et débouchant au niveau de la zone arrière, la forme de ces évidements étant telle qu'elle présente à partir de la zone arrière au moins une zone rétrécie suivie d'une zone élargie.According to a first embodiment, the securing means comprise recesses regularly distributed over the periphery of the belt, produced in a substantially radial direction of the latter and opening out at the rear zone, the shape of these recesses being such that it presents from the rear zone at least one narrowed zone followed by an enlarged zone.

Ainsi, les évidements pourront être des trous sensiblement cylindriques dont l'axe est disposé à une distance de la zone arrière qui est inférieure à leur rayon.Thus, the recesses may be substantially cylindrical holes whose axis is disposed at a distance from the rear zone which is less than their radius.

Selon un deuxième mode de réalisation, les moyens de solidarisation comprennent des perçages sensiblements cylindriques, régulièrement répartis et débouchant au niveau de la zone arrière, l'axe de ces perçages est incliné relativement à celui de la ceinture, et avantageusement il coupe l'axe de la ceinture en avant de la zone arrière relativement au projectile.According to a second embodiment, the securing means comprise appreciably cylindrical bores, regularly distributed and opening out at the rear zone, the axis of these bores is inclined relative to that of the belt, and advantageously it intersects the axis of the belt in front of the rear zone relative to the projectile.

Selon un troisième mode de réalisation, la ceinture comporte au niveau de la zone arrière un prolongement sensiblement cylindrique qui lui est coaxial et les moyens de solidarisation comprennent des perçages réalisés sur le prolongement suivant une direction sensiblement radiale et régulièrement répartis sur au moins une circonférence du prolongement.According to a third embodiment, the belt comprises at the rear zone a substantially cylindrical extension which is coaxial with it and the securing means comprise holes made on the extension in a substantially radial direction and regularly distributed over at least one circumference of the extension.

Selon une variante, le prolongement cylindrique comporte une amorce de rupture disposée en arrière des perçages, qui peut être constituée par une zone amincie du prolongement sur laquelle sont réalisés des trous suivant une direction sensiblement radiale et régulièrement répartis sur une circonférence.According to a variant, the cylindrical extension comprises a fracture initiator disposed behind the bores, which can be constituted by a thinned zone of the extension on which holes are made in a substantially radial direction and regularly distributed over a circumference.

La ceinture suivant ce troisième mode de réalisation est particulièrement adaptée pour porter sur son prolongement cylindrique une bague destinée à réaliser la solidarisation du projectile avec une douille, dans ce cas les perçages débouchent entre la zone annulaire de la ceinture et la bague, et le joint d'étanchéité vient remplir l'espace situé entre la bague et la zone annulaire.The belt according to this third embodiment is particularly suitable for carrying on its cylindrical extension a ring intended to secure the projectile with a socket, in this case the holes open out between the annular zone of the belt and the ring, and the joint seal fills the space between the ring and the annular area.

L'invention sera mieux comprise à la lecture de la description de modes particuliers de réalisation, description faite en référence aux dessins annexés dans lesquels:The invention will be better understood on reading the description of particular embodiments, description made with reference to the accompanying drawings in which:

La figure 1 représente schématiquement en demi-vue un projectile flèche équipé d'une ceinture selon un premier mode de réalisation.Figure 1 shows schematically in half-view an arrow projectile equipped with a belt according to a first embodiment.

La figure 2 est une vue de la précédente suivant la direction F.Figure 2 is a view of the previous one in direction F.

Les figures 3A, 3B et 3C sont des vues de la ceinture seule.Figures 3A, 3B and 3C are views of the belt alone.

La figure 4 représente une variante du précédent mode de réalisation.FIG. 4 represents a variant of the previous embodiment.

Les figures 5A et 5B représentent la ceinture seule selon un deuxième mode de réalisation de l'invention.Figures 5A and 5B show the belt alone according to a second embodiment of the invention.

La figure 6 représente schématiquement un projectile flèche équipé d'une ceinture selon un troisième mode de réalisation.FIG. 6 schematically represents an arrow projectile equipped with a belt according to a third embodiment.

La figure 7 est une vue de la ceinture de la figure 6 représentée seule.Figure 7 is a view of the belt of Figure 6 shown alone.

La figure 8 est une variante de ce troisième mode de réalisation de la ceinture.Figure 8 is a variant of this third embodiment of the belt.

En se reportant à la figure 1, un projectile flèche 1 est constitué de façon classique par un sabot 2, comprenant plusieurs segments, en général trois, et dans lequel est disposé un pénétrateur 3 en matériau lourd, par exemple en uranium appauvri.Referring to Figure 1, an arrow projectile 1 is conventionally constituted by a shoe 2, comprising several segments, generally three, and in which is disposed an indenter 3 of heavy material, for example depleted uranium.

Les différents segments du sabot sont maintenus par une frette avant 4 et une ceinture 5 qui est destinée à réaliser l'étanchéité entre le tube de l'arme et le projectile lors du tir.The different segments of the sabot are held by a front hoop 4 and a belt 5 which is intended to seal between the barrel of the weapon and the projectile during firing.

Frette avant et ceinture sont disposées dans des gorges annulaires 9 et 10 réalisées sur le sabot, et sont au calibre du tube, leur mise en place est effectuée par injection directement sur le sabot disposé dans un moule approprié.Front hoop and belt are arranged in annular grooves 9 and 10 made on the shoe, and are of the tube caliber, their installation is carried out by injection directly on the shoe arranged in a suitable mold.

Un joint d'étanchéité arrière 6 réalise l'étanchéité entre les plans de joints des segments du sabot, et entre le sabot et le pénétrateur.A rear seal 6 provides sealing between the joint planes of the shoe segments, and between the shoe and the indenter.

Ce joint est par exemple obtenu par injection d'un élastomère (tel un polymère vulcanisable à haute température) sur le sabot assemblé et disposé dans un moule approprié.This seal is for example obtained by injection of an elastomer (such as a polymer vulcanizable at high temperature) on the assembled shoe and placed in a suitable mold.

Le joint comporte une lèvre externe 7 légèrement surcalibrée (de l'ordre de 121 mm pour un calibre de 120 mm), et il vient en contact avec la ceinture 5 au niveau d'une zone annulaire arrière 8 de celle-ci.The seal includes an outer lip 7 slightly over-calibrated (of the order of 121 mm for a caliber of 120 mm), and it comes into contact with the belt 5 at a rear annular zone 8 thereof.

Le joint 6 pourrait éventuellement ne pas présenter de lèvre mais dans ce cas le diamètre externe du joint sera néanmoins proche du diamètre externe de la ceinture et donc de ce fait supérieur au calibre du tube de l'arme. La partie externe du joint se trouvera donc en contact avec la surface interne du tube de l'arme.The seal 6 could possibly not have a lip but in this case the external diameter of the seal will nevertheless be close to the external diameter of the belt and therefore therefore greater than the caliber of the barrel of the weapon. The external part of the seal will therefore be in contact with the internal surface of the barrel of the weapon.

Le contact du joint au niveau de la zone annulaire 8 permet d'éviter toute fuite des gaz propulsifs entre le joint et la ceinture et empêche également des fuites de se propager entre le tube de l'arme et la ceinture dans le cas où se produirait une fissuration de cette dernière.The contact of the seal at the level of the annular zone 8 makes it possible to avoid any leakage of propellant gases between the seal and the belt and also prevents leaks from propagating between the barrel of the weapon and the belt in the event that would occur cracking of the latter.

En se reportant aux figures 3A, 3B et 3C qui représentent la ceinture 5 seule, plus en détails, on voit que la zone annulaire 8 est portée par une colerette annulaire 11 et comporte des évidements 12 régulièrement répartis sur sa périphérie.Referring to Figures 3A, 3B and 3C which show the belt 5 alone, in more detail, we see that the annular area 8 is carried by an annular flange 11 and has recesses 12 regularly distributed over its periphery.

Ces évidements sont des trous cylindriques 12, réalisés suivant une direction sensiblement radiale de la ceinture, et traversant la colerette 11. La ceinture comporte ici neuf trous 12 régulièrement répartis.These recesses are cylindrical holes 12, produced in a substantially radial direction of the belt, and passing through the flange 11. The belt here has nine holes 12 regularly distributed.

On choisira un nombre de trous qui soit de préférence un multiple du nombre de segments du sabot, et on entendra par répartition régulière une répartition assurant une position du centre de gravité de la ceinture sensiblement sur son axe 15 (axe du projectile).We will choose a number of holes which is preferably a multiple of the number of shoe segments, and we mean by regular distribution a distribution ensuring a position of the center of gravity of the belt substantially on its axis 15 (axis of the projectile).

On pourra donc adopter un espacement sensiblement égal entre chaque trou et ses deux voisins immédiats (ce qui est le cas dans les exemples représentés).We can therefore adopt a substantially equal spacing between each hole and its two immediate neighbors (which is the case in the examples shown).

Mais il sera possible également d'adopter une répartition des trous telle que la ceinture présente une symétrie de rotation d'ordre 3 (pour un sabot à trois segments) autour de son axe.But it will also be possible to adopt a distribution of the holes such that the belt has a rotation symmetry of order 3 (for a shoe with three segments) around its axis.

L'axe de ces trous est disposé à une distance d (figure 3B) qui est inférieure au rayon des trous, ainsi les trous débouchent au niveau de la zone annulaire arrière 8.The axis of these holes is arranged at a distance d (FIG. 3B) which is less than the radius of the holes, thus the holes open out at the level of the rear annular zone 8.

Une telle disposition permet d'obtenir des évidements qui présentent à partir de la zone arrière 8 au moins une zone rétrécie (ici l'ouverture des trous sur la zone arrière 8) suivie d'une zone élargie (le diamètre des trous).Such an arrangement makes it possible to obtain recesses which have, from the rear zone 8 at least one narrowed zone (here the opening of the holes on the rear zone 8) followed by an enlarged zone (the diameter of the holes).

Ainsi le matériau constitutif du joint va, lors de son injection, pénétrer dans les évidements, et le rétrécissement de ces derniers permettra de retenir mécaniquement le joint.Thus, the material constituting the seal will, during its injection, penetrate into the recesses, and the narrowing of the latter will make it possible to mechanically retain the seal.

Les évidements constituent alors un moyen assurant la solidarisation mécanique par concordance de forme de la ceinture avec le matériau constitutif du joint.The recesses then constitute a means ensuring the mechanical joining by matching the shape of the belt with the material of which the seal is made.

On empêche de cette manière le joint de se séparer de la ceinture consécutivement à son frottement ou bien à celui de sa lèvre périphérique 7 sur le tube de l'arme.This prevents the seal from separating from the belt following its friction or that of its peripheral lip 7 on the barrel of the weapon.

La figure 4 représente, en vue externe non coupée, une variante de réalisation dans laquelle les évidements 12 qui sont réalisés sur la colerette suivant une direction radiale présentent une section trapézoïdale.FIG. 4 shows, in uncut external view, an alternative embodiment in which the recesses 12 which are produced on the collar in a radial direction have a trapezoidal section.

Les figures 5A et 5B montrent un deuxième mode de réalisation de l'invention dans lequel la ceinture 5 porte au niveau de la zone annulaire 8 des perçages sensiblement cylindriques 13, et régulièrement répartis (ici neuf perçages).FIGS. 5A and 5B show a second embodiment of the invention in which the belt 5 carries, at the level of the annular zone 8, substantially cylindrical bores 13, and regularly distributed (here nine bores).

Les axes 14 de ces perçages sont inclinés relativement à l'axe 15 de la ceinture 5 (et donc à l'axe du projectile).The axes 14 of these holes are inclined relative to the axis 15 of the belt 5 (and therefore to the axis of the projectile).

Dans la variante représentée les axes 14 sont inclinés de telle sorte qu'ils coupent l'axe de la ceinture en avant de la zone annulaire 8.In the variant shown, the axes 14 are inclined so that they intersect the axis of the belt in front of the annular zone 8.

Une telle disposition permet d'éloigner le fond des perçages de la surface externe de la ceinture ce qui améliore la tenue mécanique de cette dernière lors de son contact avec le tube de l'arme.Such an arrangement makes it possible to move the bottom of the holes away from the external surface of the belt, which improves the mechanical resistance of the latter when it comes into contact with the barrel of the weapon.

Lors de la fabrication, le matériau du joint va pénétrer dans ces perçages qui constitueront un moyen de solidarisation du joint et de la ceinture, la résistance de ce moyen est assurée par l'inclinaison des axes des perçages.During manufacture, the material of the seal will penetrate these holes which will constitute a means of securing the seal and the belt, the resistance of this means is ensured by the inclination of the axes of the holes.

La figure 6 montre un troisième mode de réalisation, dans lequel la ceinture comporte au niveau de la zone arrière 8 un prolongement cylindrique 16 qui lui est coaxial et dont le diamètre est inférieur au calibre.FIG. 6 shows a third embodiment, in which the belt comprises at the rear zone 8 a cylindrical extension 16 which is coaxial with it and whose diameter is less than the gauge.

Ce prolongement porte des perçages 17, régulièrement répartis, réalisés sur une circonférence du prolongement suivant une direction sensiblement radiale et au voisinage de la zone annulaire arrière 8.This extension carries bores 17, regularly distributed, produced on a circumference of the extension in a substantially radial direction and in the vicinity of the rear annular zone 8.

Dans le mode particulier de réalisation décrit ici, les perçages sont cylindriques et tangents à la zone annulaire 8, mais toute autre forme serait envisageable.In the particular embodiment described here, the holes are cylindrical and tangent to the annular zone 8, but any other shape would be possible.

Lors de la réalisation du joint 6, le matériau de ce dernier va pénétrer dans les perçages et venir réaliser une couronne 18 entourant le prolongement 16.When the joint 6 is produced, the material of the latter will penetrate the holes and come to form a ring 18 surrounding the extension 16.

Les perçages constituent ainsi le moyen de solidarisation de la ceinture et du joint.The holes thus constitute the means for securing the belt and the seal.

Le prolongement 16 pourra avantageusement être utilisé pour fixer au projectile une bague de liaison 19 qui permettra de solidariser le projectile assemblé avec une douille contenant la charge propulsive (non représentée ici). Une telle bague est décrite dans la demande de brevet FR2620214.The extension 16 can advantageously be used to attach a connecting ring 19 to the projectile which will allow the assembled projectile to be secured with a socket containing the propellant charge (not shown here). Such a ring is described in patent application FR2620214.

Elle est rendue solidaire du projectile par un premier moyen de fixation non figuré ici qui sera par exemple des rivets disposés dans des trous 20 régulièrement répartis sur une circonférence du prolongement et venant en regard d'autres trous portés par la bague 19.It is made integral with the projectile by a first fixing means not shown here which will be, for example, rivets arranged in holes 20 regularly distributed over a circumference of the extension and coming opposite other holes carried by the ring 19.

La bague est fixée sur la douille par un deuxième moyen de fixation du type de ceux décrits dans la demande de brevet FR2620214 (par exemple des rivets et une pièce intermédiaire).The ring is fixed to the sleeve by a second fixing means of the type described in patent application FR2620214 (for example rivets and an intermediate piece).

Les moyens de fixation seront dimensionnés de telle sorte que la rupture du deuxième moyen intervienne sous l'effet de la pression des gaz propulsifs, le premier moyen ne se rompant pas.The fixing means will be dimensioned so that the rupture of the second means occurs under the effect of the pressure of the propellant gases, the first means not breaking.

On dimensionnera également les perçages 17 de telle façon que la rupture du prolongement 16 intervienne le cas échéant de préférence au niveau des brous 20 et du premier moyen de fixation de la bague 19.The holes 17 will also be dimensioned in such a way that the rupture of the extension 16 occurs, where appropriate, preferably at the level of the studs 20 and the first means of fixing the ring 19.

Il sera possible par exemple de prévoir plus de trous 20 que de perçages 17 pour un même diamètre, la section à cisailler se trouvera ainsi plus fragile au niveau des trous 20.It will be possible for example to provide more holes 20 than holes 17 for the same diameter, the section to be sheared will thus be more fragile at the level of the holes 20.

Il sera possible également de fragiliser les rivets de fixation disposés dans les trous 20, ou bien encore de diminuer l'épaisseur du prolongement 16 au niveau des trous 20.It will also be possible to weaken the fixing rivets arranged in the holes 20, or even to reduce the thickness of the extension 16 at the level of the holes 20.

Avec ce dernier mode de réalisation de l'invention il sera particulièrement intéressant de positionner la bague 19 de telle sorte qu'elle vienne en contact avec la couronne 18 formée par le joint 6.With this latter embodiment of the invention, it will be particularly advantageous to position the ring 19 so that it comes into contact with the crown 18 formed by the seal 6.

Ainsi le joint d'étanchéité remplit tout l'espace situé entre la bague 19 et la zone annulaire 8 de la ceinture et il se trouve pincé entre ces deux éléments, il joue alors le rôle d'amortisseur des vibrations que la douille transmet au projectile par l'intermédiaire de la bague, diminuant ainsi les contraintes mécaniques au niveau de la liaison bague projectile et augmentant la résistance et la durée de vie de cette liaison.Thus the seal fills the entire space between the ring 19 and the annular zone 8 of the belt and it is pinched between these two elements, it then acts as a shock absorber of the vibrations that the socket transmits to the projectile through the ring, thereby reducing the mechanical stresses at the projectile ring connection and increasing the resistance and the service life of this connection.

La figure 8 montre une variante de réalisation dans laquelle les perçages 17 sont répartis sur une circonférence située dans un plan radial 21.FIG. 8 shows an alternative embodiment in which the holes 17 are distributed over a circumference situated in a radial plane 21.

Des trous 24 sont répartis sur une circonférence située dans un autre plan radial 22.Holes 24 are distributed over a circumference situated in another radial plane 22.

Le prolongement 16 présente également une zone amincie 23 au niveau des perçages 17 et des trous 24.The extension 16 also has a thinned zone 23 at the holes 17 and the holes 24.

Le matériau constitutif du joint 6 ne pénètre que dans les perçages 17 situés dans le plan 21, les trous 24 situés dans le plan 22 sont libres.The material constituting the seal 6 only penetrates into the holes 17 located in the plane 21, the holes 24 located in the plane 22 are free.

La zone amincie 23 constitue une amorce de rupture permettant la séparation de la ceinture 5 d'avec la bague 19.The thinned zone 23 constitutes a primer for rupture allowing the separation of the belt 5 from the ring 19.

La rupture interviendra au niveau du plan 22 dans lequel se trouvent les trous 24 qui ne sont pas remplis par le matériau du joint, c'est à dire en arrière des perçages 17 qui continueront à remplir leur fonction de solidarisation du joint et de la ceinture.The rupture will occur at the level of the plane 22 in which are the holes 24 which are not filled with the material of the joint, that is to say behind the holes 17 which will continue to fulfill their function of securing the joint and the belt .

On conserve ainsi une longueur réduite pour le prolongement 16 tout en assurant la solidarisation du joint 6 et de la ceinture.This keeps a reduced length for the extension 16 while ensuring the attachment of the seal 6 and the belt.

D'autres modes de réalisation de l'amorce de rupture du prolongement en arrière des perçages 17 pourront être adoptés, on pourra par exemple prévoir un sillon annulaire réalisant un amincissement du prolongement.Other embodiments of the initiation of rupture of the extension behind the bores 17 can be adopted, for example, it is possible to provide an annular groove making a thinning of the extension.

Claims (10)

1-Ceinture d'étanchéité (5) pour un sabot (2) d'un projectile flèche caractérisée en ce qu'elle comporte une zone arrière (8) sensiblement annulaire sur laquelle vient en contact, lorsque la ceinture est mise en place dans une gorge annulaire du sabot, un joint d'étanchéité (6) solidaire du sabot, et en ce qu'elle comporte des moyens (12, 13, 17) assurant sa solidarisation mécanique par concordance de forme avec le matériau constitutif du joint (6). 1- Sealing belt (5) for a shoe (2) of an arrow projectile characterized in that it comprises a rear zone (8) substantially annular on which comes into contact, when the belt is placed in a annular groove of the shoe, a seal (6) integral with the shoe, and in that it comprises means (12, 13, 17) ensuring its mechanical connection by form matching the material of the seal (6) . 2-Ceinture d'étanchéité selon la revendication 1, caractérisée en ce que les moyens de solidarisation comprennent des évidements (12) régulièrement répartis sur la périphérie de la ceinture (5), réalisés suivant une direction sensiblement radiale de cette dernière et débouchant au niveau de la zone arrière (8), la forme de ces évidements étant telle qu'elle présente à partir de la zone arrière 18) au moins une zone rétrécie suivie d'une zone élargie. 2- sealing belt according to claim 1, characterized in that the securing means comprise recesses (12) regularly distributed over the periphery of the belt (5), produced in a substantially radial direction of the latter and opening at the level of the rear zone (8), the shape of these recesses being such that it presents from the rear zone 18) at least one narrowed zone followed by an enlarged zone. 3-Ceinture d'étanchéité selon la revendication 2, caractérisée en ce que les évidements (12) sont des trous sensiblement cylindriques dont l'axe est disposé à une distance de la zone arrière (8) qui est inférieure à leur rayon. 3- sealing belt according to claim 2, characterized in that the recesses (12) are substantially cylindrical holes whose axis is disposed at a distance from the rear area (8) which is less than their radius. 4-Ceinture d'étanchéité selon la revendication 1, caractérisée en ce que les moyens de solidarisation comprennent des perçages (13) sensiblements cylindriques, régulièrement répartis et débouchant au niveau de la zone arrière (8), l'axe (14) de ces perçages étant incliné relativement à celui (15) de la ceinture (5). 4- sealing belt according to claim 1, characterized in that the securing means comprise holes (13) substantially cylindrical, regularly distributed and opening at the rear area (8), the axis (14) of these bores being inclined relative to that (15) of the belt (5). 5-Ceinture d'étanchéité selon la revendication 4, caractérisée en ce que l'axe (14) des perçages coupe l'axe (15) de la ceinture en avant de la zone arrière (8) relativement au projectile. 5- sealing belt according to claim 4, characterized in that the axis (14) of the holes intersects the axis (15) of the belt in front of the rear zone (8) relative to the projectile. 6-Ceinture d'étanchéité selon la revendication 1, caractérisée en ce qu'elle comporte au niveau de la zone arrière (8) un prolongement (16) sensiblement cylindrique coaxial à la ceinture (5) et en ce que les moyens de solidarisation comprennent des perçages (17) réalisés sur le prolongement (16) suivant une direction sensiblement radiale et régulièrment répartis sur au moins une circonférence du prolongement. 6- sealing belt according to claim 1, characterized in that it comprises at the rear zone (8) a substantially cylindrical extension (16) coaxial with the belt (5) and in that the securing means comprise holes (17) produced on the extension (16) in a substantially radial direction and regularly distributed over at least one circumference of the extension. 7-Ceinture d'étanchéité selon la revendication 6, caractérisée en ce que le prolongement cylindrique (16) comporte une amorce de rupture (23, 24) disposée en arrière des perçages (17). 7- Sealing belt according to claim 6, characterized in that the cylindrical extension (16) comprises a rupture initiator (23, 24) disposed behind the holes (17). 8-Ceinture d'étanchéité selon la revendication 7, caractérisée en ce que l'amorce de rupture est constituée par une zone amincie (23) du prolongement sur laquelle sont réalisés des trous (24) suivant une direction sensiblement radiale et régulièrement répartis sur une circonférence. 8- Sealing belt according to claim 7, characterized in that the breaking point consists of a thinned zone (23) of the extension on which holes (24) are made in a substantially radial direction and regularly distributed over a circumference. 9-Sabot de projectile flèche, caractérisé en ce qu'il est équipé d'une ceinture selon une des revendications 1 à 8. 9- Arrow projectile shoe, characterized in that it is equipped with a belt according to one of claims 1 to 8. 10-Sabot de projectile flèche équipé d'une ceinture d'étanchéité selon une des revendications 6 à 8, et dont le prolongement cylindrique (16) porte une bague (19) destinée à réaliser la solidarisation du projectile avec une douille, caractérisée en ce que les perçages (17) débouchent entre la zone annulaire (8) de la ceinture (5) et la bague (19), et en ce que le joint d'étanchéité (6) vient remplir l'espace situé entre la bague (19) et la zone annulaire (8). 10- Arrow projectile shoe equipped with a sealing belt according to one of claims 6 to 8, and whose cylindrical extension (16) carries a ring (19) intended to secure the projectile with a socket, characterized in that that the holes (17) open out between the annular zone (8) of the belt (5) and the ring (19), and in that the seal (6) fills the space between the ring (19 ) and the annular zone (8).
EP91402230A 1990-08-13 1991-08-12 Sealing strip for arrow-type projectile Expired - Lifetime EP0471617B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR909010285A FR2665761B1 (en) 1990-08-13 1990-08-13 SEALING BELT FOR ARROW PROJECTILE.
FR9010285 1990-08-13

Publications (2)

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EP0471617A1 true EP0471617A1 (en) 1992-02-19
EP0471617B1 EP0471617B1 (en) 1995-06-07

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Application Number Title Priority Date Filing Date
EP91402230A Expired - Lifetime EP0471617B1 (en) 1990-08-13 1991-08-12 Sealing strip for arrow-type projectile

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US (1) US5189254A (en)
EP (1) EP0471617B1 (en)
JP (1) JPH0658699A (en)
AT (1) ATE123565T1 (en)
DE (1) DE69110212T2 (en)
FR (1) FR2665761B1 (en)
IL (1) IL99112A (en)
NO (1) NO174268C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH684803A5 (en) * 1993-03-05 1994-12-30 Contraves Ag Discarding sabot for a sub-calibre, fin-stabilised kinetic-energy projectile which is fired with spin

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6279214B1 (en) * 1999-07-14 2001-08-28 Alliant Techsystems Inc. Moisture seal for composite sabot with depleted uranium penetrator
FR2842896B1 (en) * 2002-07-26 2004-10-22 Giat Ind Sa SEALING BELT FOR A PROJECTILE, PROJECTILE UNDER CALIBER AND AMMUNITION PROVIDED WITH SUCH A BELT
DE10320194A1 (en) * 2003-05-07 2004-12-02 Rheinmetall W & M Gmbh Disposable sabot
DE102008015421A1 (en) * 2008-03-20 2009-09-24 Rheinmetall Waffe Munition Gmbh Method of making a cartridge and cartridge having a sabot projectile made by this method
JP5305378B2 (en) * 2008-08-21 2013-10-02 株式会社Ｉｈｉエアロスペース Obturators and bullets
US10502515B2 (en) * 2017-01-17 2019-12-10 Raytheon Company Launch piston brake
US10996037B2 (en) * 2018-09-04 2021-05-04 The United States Of America As Represented By The Secretary Of The Army Obturator for robust and uniform discard

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU57539A1 (en) * 1968-12-12 1970-06-15
DE2537116A1 (en) * 1974-08-21 1976-03-11 Bofors Ab BULLET OR GUIDE RING FOR A SUB-CALIBER BULLET
DE3332675A1 (en) * 1983-09-10 1985-03-28 Rheinmetall GmbH, 4000 Düsseldorf Cartridge ammunition

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191217267A (en) * 1912-07-24 1912-12-05 Albert Ammerman Ackerman Improvements in or relating to Projectiles.
BE572090A (en) * 1957-11-28
US3131938A (en) * 1960-07-08 1964-05-05 William R Barry Packing cartridge assembly
DE2844870C2 (en) * 1978-10-14 1984-10-18 Rheinmetall GmbH, 4000 Düsseldorf Sub-caliber training projectile
DE3009342A1 (en) * 1980-03-12 1986-06-26 Rheinmetall GmbH, 4000 Düsseldorf CARTRIDGED AMMUNITION WITH AT LEAST PARTLY COMBUSTIBLE DRIVE CHARGE
US4444113A (en) * 1981-04-06 1984-04-24 The United States Of America As Represented By The Secretary Of The Army High-pressure self-sealing obturator in sabot discard projectile
US4552071A (en) * 1982-06-15 1985-11-12 United Technologies Corporation Two-piece despin obturator
DE3314749A1 (en) * 1983-04-23 1984-10-25 L'Etat Français représenté par le Délégué Général pour l'Armement, Paris SEGMENTED DRIVING CAGE
DE3334022A1 (en) * 1983-09-21 1985-04-04 Mauser-Werke Oberndorf Gmbh, 7238 Oberndorf BULLET BODY WITH PLASTIC GUIDE BAND
AT388452B (en) * 1984-10-24 1989-06-26 Voest Alpine Ag LOW-BALANCE BALANCE SHEET
FR2606869B1 (en) * 1986-11-19 1990-10-05 France Etat Armement SLIDING BELT FOR ALL CALIBER PROJECTILE
NO163425C (en) * 1987-04-30 1990-05-23 Oerlikon Buehrle Ag DESIGN OF A DESCRIPTION BREAKDOWN AT THE BODY OF A DRIVE MIRROR FOR A DRIVE MIRROR PROJECT.
USH405H (en) * 1987-08-24 1988-01-05 The United States Of America As Represented By The Secretary Of The Army Rocket/launcher interface
FR2620214B1 (en) * 1987-09-09 1990-04-13 France Etat Armement CONNECTING RING BETWEEN A PROJECTILE AND A SOCKET

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU57539A1 (en) * 1968-12-12 1970-06-15
DE2537116A1 (en) * 1974-08-21 1976-03-11 Bofors Ab BULLET OR GUIDE RING FOR A SUB-CALIBER BULLET
DE3332675A1 (en) * 1983-09-10 1985-03-28 Rheinmetall GmbH, 4000 Düsseldorf Cartridge ammunition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH684803A5 (en) * 1993-03-05 1994-12-30 Contraves Ag Discarding sabot for a sub-calibre, fin-stabilised kinetic-energy projectile which is fired with spin

Also Published As

Publication number Publication date
NO913133D0 (en) 1991-08-12
NO174268C (en) 1994-04-06
EP0471617B1 (en) 1995-06-07
DE69110212T2 (en) 1995-11-09
IL99112A0 (en) 1992-07-15
FR2665761B1 (en) 1994-09-16
ATE123565T1 (en) 1995-06-15
DE69110212D1 (en) 1995-07-13
IL99112A (en) 1994-02-27
FR2665761A1 (en) 1992-02-14
NO913133L (en) 1992-02-14
NO174268B (en) 1993-12-27
JPH0658699A (en) 1994-03-04
US5189254A (en) 1993-02-23

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