FR2662790A2 - Improvements made to the production of projectiles having tandem charges with explosive effects - Google Patents

Improvements made to the production of projectiles having tandem charges with explosive effects Download PDF

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Publication number
FR2662790A2
FR2662790A2 FR9006925A FR9006925A FR2662790A2 FR 2662790 A2 FR2662790 A2 FR 2662790A2 FR 9006925 A FR9006925 A FR 9006925A FR 9006925 A FR9006925 A FR 9006925A FR 2662790 A2 FR2662790 A2 FR 2662790A2
Authority
FR
France
Prior art keywords
projectile
connecting wire
wire
tandem
flexible
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
FR9006925A
Other languages
French (fr)
Other versions
FR2662790B2 (en
Inventor
Arene Francois
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.)
SERAT
Original Assignee
SERAT
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
Priority claimed from FR8700319A external-priority patent/FR2609542B1/en
Application filed by SERAT filed Critical SERAT
Priority to FR9006925A priority Critical patent/FR2662790B2/en
Priority to DE19914112915 priority patent/DE4112915A1/en
Priority to GB9112103A priority patent/GB2244797B/en
Publication of FR2662790A2 publication Critical patent/FR2662790A2/en
Application granted granted Critical
Publication of FR2662790B2 publication Critical patent/FR2662790B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
    • F42B12/10—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge
    • F42B12/16—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge in combination with an additional projectile or charge, acting successively on the target
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
    • F42B12/58—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles
    • F42B12/66—Chain-shot, i.e. the submissiles being interconnected by chains or the like

Abstract

1. Tandem charge intended for attacking tanks, especially those whose protection comprises long-life active prearmourings, the said tandem charge consisting, on its trajectory, of two separate projectiles connected by means of a connecting wire and each containing a charge with explosive effects, in such a way that the rear projectile follows the front projectile, according to any one of the claims of the main patent, characterised in that the upstream end (12') of the connecting wire (12) is fastened to a flexible attachment piece (14) positioned in the front projectile (10), so as to transfer the meeting point (B) of the direction of the wire and of the axis of the projectile forwards of the centre of gravity (G) of the latter, this meeting point (B) thus forming an imaginary attachment point for the end of the connecting wire (12).

Description

La présente addition concerne des perfectionnements apportés aux charges tandem du type décrit et revendiqué dans le brevet principal, c'est-à-dire à des charges constituées sur trajectoire par deux projectiles distincts qui sont réunis par un fil de liaison et qui renferment chacun une charge à effets d'explosif, de manière que le projectile arrière suive le projectile avant. The present addition relates to improvements made to tandem charges of the type described and claimed in the main patent, that is to say to charges formed on the trajectory by two separate projectiles which are joined by a connecting wire and which each contain a explosive charge, so that the rear projectile follows the front projectile.

Les calculs effectués par le présent titulaire ont montré que pour assurer une bonne stabilité du vol des deux projectiles qui constituent une telle charge tandem, il est nécessaire que le point d'accrochage du fil de liaison soit positionné au voisinage du centre de gravité du projectile avant. Il n est bien entendu pas possible de fixer matériellement le point d'accrochage du fil de liaison en un tel emplacement étant donné que ce fil de liaison ne peut pas traverser le projectile. La présente addition se propose d'apporter une solution à un tel problème. The calculations made by the present holder have shown that to ensure good flight stability of the two projectiles which constitute such a tandem charge, it is necessary that the attachment point of the connecting wire is positioned in the vicinity of the center of gravity of the projectile before. It is of course not possible to physically fix the attachment point of the connecting wire in such a location since this connecting wire cannot pass through the projectile. This addition proposes to provide a solution to such a problem.

Selon cette addition, l'extrémité amont du fil de liaison est attachée sur une pièce de fixation, réalisée sous la forme dtun embout souple qui est positionné dans le projectile avant de manière à reporter le point de rencontre de la direction du fil avec l'axe de ce projectile en avant du centre de gravité de ce dernier, ce point de liaison constituant ainsi un point d'accrochage fictif pour le fil de liaison. According to this addition, the upstream end of the connecting wire is attached to a fixing piece, produced in the form of a flexible end piece which is positioned in the front projectile so as to postpone the meeting point of the direction of the wire with the axis of this projectile in front of the latter's center of gravity, this connection point thus constituting a fictitious attachment point for the connection wire.

Selon un exemple de réalisation préféré de la présente addition, ledit embout souple est lui-même relié à une partie fixe du projectile avant à l'aide d'un fil qui limite la déformation de l'embout sous l'effet de l'effort de forcement du fil de liaison lors de son déroulement. According to a preferred embodiment of the present addition, said flexible end piece is itself connected to a fixed part of the front projectile using a wire which limits the deformation of the end piece under the effect of the force. forcing the connecting wire during its unwinding.

D'autres caractéristiques et avantages de la présente addition ressortiront de la description faite ci-après en référence au dessin annexé qui en illustre un exemple de réalisation dépourvu de tout caractère limitatif. Il est bien précisé qu'il s'agit là uniquement d'un exemple et que l'addition peut également s'appliquer sans sortir de son cadre, à tous autres modes de réalisation, formes, proportions, dispositions de construction etc...Sur le dessin annexé:
- la figure 1 est une vue schématique partielle représentant le projectile avant d'une charge tandem selon le brevet principal et perfectionnée selon la présente addition, avec arrachement partiel de manière à illustrer le mode d'accrochage du fil de liaison du projectile avant au projectile arrière non représentés sur le dessin et
- la figure 2 est une vue de détail de ce projectile avant montrant en arrachement un mode de réalisation préféré de l'objet de la présente addition.Other characteristics and advantages of the present addition will emerge from the description given below with reference to the appended drawing which illustrates an embodiment thereof devoid of any limiting character. It is clearly stated that this is only an example and that the addition can also be applied without departing from its scope, to all other embodiments, shapes, proportions, construction arrangements, etc. In the attached drawing:
- Figure 1 is a partial schematic view showing the front projectile of a tandem charge according to the main patent and improved according to the present addition, with partial cutaway so as to illustrate the method of attachment of the connecting wire of the front projectile to the projectile rear not shown in the drawing and
- Figure 2 is a detail view of this front projectile showing in cutaway a preferred embodiment of the object of the present addition.

Sur le dessin, on voit en 10 le projectile avant de la charge tandem décrite et revendiquée dans le brevet principal et qui est relié au projectile arrière, non visible sur le dessin, par un fil de liaison 12. In the drawing, we see at 10 the front projectile of the tandem charge described and claimed in the main patent and which is connected to the rear projectile, not visible in the drawing, by a connecting wire 12.

Etant donné que ce fil de liaison 12 ne peut pas traverser le projectile 10 en raison de la présence dans ce dernier de la charge explosive, de son revetement et de son système d'amorçage, on attache selon la présente addition l'extrémité 12' de ce fil de liaison sur une pièce d'accrochage réalisée sous la forme d'un embout souple 14. Since this connecting wire 12 cannot pass through the projectile 10 due to the presence in the latter of the explosive charge, its coating and its initiation system, the end 12 ′ is attached according to this addition of this connecting wire on a hooking part produced in the form of a flexible end piece 14.

Ainsi, ce dernier fléchit sous l'effet de la composante latérale du fil de liaison 12 lorsque le projectile 10 est incliné sur la direction générale du fil et l'on reporte de cette manière le point de rencontre de la direction X-X du fil avec l'axe Y-Y du projectile en avant du centre de gravité G de ce dernier. Sur les figures, on a désigné par la référence B le point de rencontre entre les deux axes
X-X et Y-Y qui définissent ainsi un point d'accrochage fictif pour le fil 12 qui est situé en avant du centre de gravité G du projectile avant 10.Thus, the latter flexes under the effect of the lateral component of the connecting wire 12 when the projectile 10 is inclined towards the general direction of the wire and in this way the point of meeting of the direction XX of the wire is transferred. axis YY of the projectile in front of the center of gravity G of the latter. In the figures, the reference point B has designated the meeting point between the two axes
XX and YY which thus define a fictitious attachment point for the wire 12 which is located in front of the center of gravity G of the front projectile 10.

Comme on le voit en détail sur la figure 2, l'embout souple 14 est monté à l'intérieur d'une pièce 16 qui, dans cet exemple de réalisation qui ne présente aucun caractère limitatif, est constituée par le verrou qui maintient le volet d interruption de la chaîne pyrotechnique du projectile 10. As can be seen in detail in FIG. 2, the flexible end piece 14 is mounted inside a part 16 which, in this exemplary embodiment which has no limiting character, is constituted by the lock which holds the flap interruption of the pyrotechnic chain of projectile 10.

Le calcul montre que la condition de report du point de rencontre B entre la direction X-X du fil 12 et l'axe Y-Y du projectile 10 peut être assurée avec une précision de l'ordre de plus ou moins 10 mm par exemple. Cependant, cette condition, quoique approximative, ne peut être assurée que si l'effort de traction du fil de liaison 12 demeure dans un certain domaine d'ordre de grandeur. Ainsi cette condition n'est plus assurée en phase de déroulement du fil, lorsque l'effort de déroulement est de tordre de 40 N, au lieu de 5 N en phase de vol. The calculation shows that the condition for transferring the meeting point B between the direction X-X of the wire 12 and the axis Y-Y of the projectile 10 can be ensured with an accuracy of the order of plus or minus 10 mm for example. However, this condition, although approximate, can only be ensured if the tensile force of the connecting wire 12 remains within a certain range of magnitude. Thus this condition is no longer ensured in the unwinding phase of the wire, when the unwinding effort is to twist 40 N, instead of 5 N in the flight phase.

Afin de résoudre cette difficulté, l'addition prévoit de relier l'embout souple 14 à un élément fixe du projectile 10 situé en avant du point d'accrochage de l'extrémité 12' du fil 12 sur l'embout 14. Dans l'exemple de réalisation illustré sur le dessin, l'embout souple 14 est relié au fond du verrou 16 à l'aide d'un fil 18, qui pourrait constituer un prolongement du fil de liaison 12. In order to resolve this difficulty, the addition plans to connect the flexible end piece 14 to a fixed element of the projectile 10 situated in front of the point of attachment of the end 12 ′ of the wire 12 on the end piece 14. In the exemplary embodiment illustrated in the drawing, the flexible end piece 14 is connected to the bottom of the lock 16 using a wire 18, which could constitute an extension of the connecting wire 12.

Grâce à cette disposition on limite la déformation de l'embout souple 14 sous l'effort de forcement du fil 12 lors de la phase de déroulement de ce dernier.Thanks to this arrangement, the deformation of the flexible end piece 14 is limited under the force of forcing the wire 12 during the unwinding phase of the latter.

Ainsi qu'on l'a mentionné ci-dessus, le mode d'accrochage du fil de liaison 12 selon la présente addition ne compromet pas la qualité du vol des deux projectiles constituant la charge tandem, pendant la phase de déroulement du fil de liaison, tout en assurant une bonne stabilité du vol sur trajectoire après déroulement du fil 12. As mentioned above, the method of attachment of the connecting wire 12 according to the present addition does not compromise the quality of the flight of the two projectiles constituting the tandem charge, during the unwinding phase of the connecting wire. , while ensuring good flight stability on trajectory after unwinding of the wire 12.

I1 demeure bien entendu que la présente addition n'est pas limitée aux exemples de réalisation décrits et/ou représentés ici mais qu'elle en englobe toutes les variantes.  It remains to be understood that the present addition is not limited to the exemplary embodiments described and / or shown here, but that it encompasses all variants thereof.

Claims (4)

REVENDICATIONS 1. Charge tandem destinée à l'attaque des blindés, notamment ceux dont la protection comporte des préblindages actifs à longue durée de vie, constituée sur trajectoire par deux projectiles distincts réunis par un fil de liaison et renfermant chacun une charge à effets d'explosif de manière que le projectile arrière suive le projectile avant, selon l'une quelconque des revendications du brevet principal, caractérisée en ce que l'extrémité amont (12') du fil de liaison (12) est fixée sur une pièce d'accrochage souple (14) positionnée dans le projectile avant (10) de manière à reporter le point de rencontre (B) de la direction du fil avec l'axe du projectile en avant du centre de gravité (G) de ce dernier, ce point de rencontre (B) constituant ainsi un point d'accrochage fictif de l'extrémité du fil de liaison (12). 1. Tandem charge intended for attacking armored vehicles, in particular those whose protection includes active pre-armor with long life, constituted on the trajectory by two separate projectiles joined by a connecting wire and each containing an explosive charge so that the rear projectile follows the front projectile according to any one of the claims of the main patent, characterized in that the upstream end (12 ') of the connecting wire (12) is fixed on a flexible hooking piece (14) positioned in the front projectile (10) so as to transfer the meeting point (B) of the direction of the wire with the axis of the projectile in front of the center of gravity (G) of the latter, this meeting point (B) thus constituting a fictitious attachment point of the end of the connecting wire (12). 2. Charge tandem selon la revendication 1, caractérisée en ce que ladite pièce d'accrochage est réalisée sous la forme d'un embout souple (14) fixé dans un élément du projectile (10), tel que le verrou (16) du système d'interruption de chalande pyrotechnique de ce projectile. 2. Tandem load according to claim 1, characterized in that said attachment piece is produced in the form of a flexible end piece (14) fixed in an element of the projectile (10), such as the bolt (16) of the system interruption of the pyrotechnic barge of this projectile. 3. Charge tandem selon l'une des revendications précédentes, caractérisée en ce que ladite pièce d'accrochage souple (14) est elle-même reliée à une partie fixe du projectile afin de limiter la déformation de ladite pièce d'accrochage souple sous l'effet de l'effort de forcement du fil de liaison (12), lors de la phase de déroulement de ce dernier. 3. Tandem load according to one of the preceding claims, characterized in that said flexible attachment part (14) is itself connected to a fixed part of the projectile in order to limit the deformation of said flexible attachment part under the effect of the forcing effort of the connecting wire (12), during the unwinding phase of the latter. 4. Charge tandem selon la revendication 3, caractérisée en ce que ladite pièce d'accrochage souple (18) est reliée à ladite partie fixe du projectile avant par un fil (14) qui peut éventuellement constituer un prolongement du fil de liaison (12).  4. Tandem load according to claim 3, characterized in that said flexible attachment piece (18) is connected to said fixed part of the front projectile by a wire (14) which may possibly constitute an extension of the connecting wire (12) .
FR9006925A 1987-01-14 1990-06-05 IMPROVEMENTS IN THE PRODUCTION OF TANDEM-LOADED PROJECTILES WITH EXPLOSIVE EFFECTS. Expired - Lifetime FR2662790B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR9006925A FR2662790B2 (en) 1987-01-14 1990-06-05 IMPROVEMENTS IN THE PRODUCTION OF TANDEM-LOADED PROJECTILES WITH EXPLOSIVE EFFECTS.
DE19914112915 DE4112915A1 (en) 1990-06-05 1991-04-19 War head with tandem explosive charges
GB9112103A GB2244797B (en) 1990-06-05 1991-06-05 Tandem charge for attacking armoured vehicles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8700319A FR2609542B1 (en) 1987-01-14 1987-01-14 IMPROVEMENTS TO TANDEM HOLLOW LOAD PROJECTILES
FR9006925A FR2662790B2 (en) 1987-01-14 1990-06-05 IMPROVEMENTS IN THE PRODUCTION OF TANDEM-LOADED PROJECTILES WITH EXPLOSIVE EFFECTS.

Publications (2)

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FR2662790A2 true FR2662790A2 (en) 1991-12-06
FR2662790B2 FR2662790B2 (en) 1994-09-16

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FR9006925A Expired - Lifetime FR2662790B2 (en) 1987-01-14 1990-06-05 IMPROVEMENTS IN THE PRODUCTION OF TANDEM-LOADED PROJECTILES WITH EXPLOSIVE EFFECTS.

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FR (1) FR2662790B2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2310547A1 (en) * 1975-05-06 1976-12-03 Realisa Et Applic Tech Et Missile with secondary charge ahead of main charge - has small charge on nose cone positioned not to disturb main explosion
DE2757250A1 (en) * 1977-12-22 1979-06-28 Messerschmitt Boelkow Blohm Missile initial stabilising system - comprises grooved rotary body from which anchor strip unwinds
WO1986000979A1 (en) * 1984-07-30 1986-02-13 General Electric Company Shaped charge projectile system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2310547A1 (en) * 1975-05-06 1976-12-03 Realisa Et Applic Tech Et Missile with secondary charge ahead of main charge - has small charge on nose cone positioned not to disturb main explosion
DE2757250A1 (en) * 1977-12-22 1979-06-28 Messerschmitt Boelkow Blohm Missile initial stabilising system - comprises grooved rotary body from which anchor strip unwinds
WO1986000979A1 (en) * 1984-07-30 1986-02-13 General Electric Company Shaped charge projectile system

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FR2662790B2 (en) 1994-09-16

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