EP0465585A1 - Unites de munitions ameliorees - Google Patents

Unites de munitions ameliorees

Info

Publication number
EP0465585A1
EP0465585A1 EP90906401A EP90906401A EP0465585A1 EP 0465585 A1 EP0465585 A1 EP 0465585A1 EP 90906401 A EP90906401 A EP 90906401A EP 90906401 A EP90906401 A EP 90906401A EP 0465585 A1 EP0465585 A1 EP 0465585A1
Authority
EP
European Patent Office
Prior art keywords
shell
ammunition unit
lag
ignition system
time
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.)
Withdrawn
Application number
EP90906401A
Other languages
German (de)
English (en)
Inventor
Leif Brattström
Sven-Erik Lind N
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.)
Saab Bofors AB
Original Assignee
Swedish Ordnance FFV Bofors AB
Bofors AB
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 Swedish Ordnance FFV Bofors AB, Bofors AB filed Critical Swedish Ordnance FFV Bofors AB
Publication of EP0465585A1 publication Critical patent/EP0465585A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the present invention relates to an ammunition unit in the form of a projectile, shell, missile or the like, for example an anti-tank shell of the type which includes a shaped hollow charge portion, and in which the forward portion of the ammunition unit is provided with a reinforced tip for mechanical penetration of reactive armour, and an ignition system disposed so that initiation of the shaped hollow charge is not obtained until after the reinforced tip has forced aside the reactive armour without this being detonated.
  • an ammunition unit in the form of a projectile, shell, missile or the like, for example an anti-tank shell of the type which includes a shaped hollow charge portion, and in which the forward portion of the ammunition unit is provided with a reinforced tip for mechanical penetration of reactive armour, and an ignition system disposed so that initiation of the shaped hollow charge is not obtained until after the reinforced tip has forced aside the reactive armour without this being detonated.
  • An anti-tank shell of the aforesaid type is previously known from Swedish patent No. 446483.
  • the nose cone of the shell has a solid and sharper tip than in conventional anti-tank shells, and the ignition system includes an impact contact device which is not advanced right to the tip of the shell.
  • the time lag is accomplished which is normally required in order for the shell to have time to penetrate through the reactive armour before the shaped hollow charge is initiated.
  • An anti-tank shell of the aforesaid type has a high kill rate against specific targets and at typical impact angles.
  • the integrated "mechanical" time lag provides, in certain target types, an excessively indeterminate time lag.
  • One object of the present invention is therefore to realize an ammunition unit possessing a better-defined time lag within a large range of impact angles against varying target types and at different ranges.
  • a further object of the present invention is to provide good effect even against targets which are not fitted with reactive armour.
  • the ignition system must be so arranged that immediate initiation is obtained.
  • the ignition system of the ammunition unit therefore comprises a pyrotechnical or electronic ignition delay device as a complement or alternative to a mechanical time-lag device disposed in the forward portion of the ammunition unit.
  • Fig. 1 shows an anti-tank shell whose nose cone is fitted with a solid tip and impact contact device
  • Fig. 2 shows an alternative embodiment with a spike-shaped tip
  • Figs. 3-6 show in block-diagram form how the ignition system may be constructed.
  • the anti-tank shell 1 illustrated in Fig. 1 is intended to give effect against an armoured target provided with reactive armour of the skirt type placed ahead of the main armour of the target.
  • the elongate forward portion (nose cone) 2 of the shell is shown, this being capable of penetrating into the reactive armour before the warhead of the shell in the form of a shaped hollow charge located in the intermediate portion (not shown) of the shell, is initiated.
  • the metal jet of the shaped hollow charge can provide its normal effect, since the reactive armour has not been detonated by the shell tip.
  • the tip 3 is optimated so as to be capable of forcing aside the reactive armour without this being detonated.
  • the tip 3 is thus solid and has a comparatively small tip radius, in addition to which its material thickness in the longitudinal direction amounts to at least 4 to 5 times the wall thickness of the rest of the nose cone.
  • the nose cone also includes an impact contact device in the form of a full-calibre double shell which consists of an outer shell included in the outer casing of the projectile proper, and an inner shell 4.
  • the outer and inner shells are, in a per se known manner, disposed at a distance from and insulated from one another in order when the projectile strikes a target to enter into mutual co-operation and establish electric contact with each other.
  • the shells form a passive making contact in the ignition system of the projectile for initiating the shaped hollow charge.
  • the contact device in this case may be drawn right up to the tip of the nose cone so that contact is obtained immediately upon impact of the projectile against a target, either against the reactive armour or against the main armour of the target.
  • the requisite time lag for detonating the shaped hollow charge is instead realized by a pyrotechnic or electronic time lag device included in the ignition system.
  • a pyrotechnic or electronic time lag device included in the ignition system.
  • there will then be obtained a better-defined time lag ideally with freedom of choice between immediate function and time lag and with the possibility of adjusting the requisite time lag in response to target type.
  • Figs. 3-6 illustrate more closely how the time-lag device may be arranged.
  • the impact contact device may also in this case be disposed so that its inner shell is not advanced right up to the tip of the nose cone, i.e. so that a certain mechanical time lag is built-in to the system.
  • an additional time-lag device as disclosed below is also included in this case.
  • Fig. 2 illustrates a variant in which the forward portion of the projectile consists of a cylindrical, under-calibre body, a so- called spike 5, whose tip is reinforced.
  • the tip consist of a separate body 6, preferably of heavy alloy, and with increased material thickness in the longitudinal direction so as to be able to force aside the reactive armour without this being detonated.
  • the body 6 is preferably fixedly screwed to the spike.
  • the spike 5 connects rearwardly with the full-calibre shell body by means of a conical transitional portion 7.
  • the contact device includes a tubular inner shell 8 which extends throughout the entire spike 5 out into the separate body 6.
  • the spike length may suitably be selected to be between 2 and 4 times the calibre.
  • a thin-walled ballistic cap 9 is disposed so as to surround the spike and connect rearwardly to the full-calibre projectile body.
  • Figs. 3-6 illustrate in block-diagram form a number of different examples of how the ignition system of the shell with time-lag device may be designed.
  • the ignition system comprises a source 10 which generates electrical energy, a storage apparatus 11 for the electrical energy, an AND function 12, an igniter 14 with built-in time lag 13, for example a pyrotechnical igniter which initiates ignition of the shaped hollow charge portion.
  • a signal is impressed on the AND function from the impact contact device 15 disposed in the tip of the shell, and from an arming circuit 16.
  • the components included in the ignition system are per se previously known and will therefore not be described in detail here.
  • Various pyrotechnical ignition delay charges may be selected.
  • a suitable time lag may lie within the range between 80 and 200 ⁇ s , but, in certain target types, time lags of up to the order of magnitude of 1,000 ⁇ s may occur.
  • the ignition system illustrated in Fig. 4 differs from that described in the foregoing in that the ignition time lag 13' is purely electronic and is disposed in the contact path between the impact sensor 15 and the AND function 12.
  • Electronic ignition time lags are per se previously known in this art and adjustment may, for example, be effected with the aid of a timing ring.
  • a suitable mode may be set on the shell according to the type of target.
  • Fig. 6 illustrates yet a further example of how the ignition system may be designed. The same reference numerals have been employed for components analogous with those previously disclosed.
  • a primary impact sensor 18 is included, being located forwardmost in the tip of the shell, and a further, secondary impact sensor 19.
  • the primary impact sensor 18 is connected to the time-lag portion of the ignition time-lag selector 17' and thereby provides for a selectable time lag on tip impact.
  • the secondary impact sensor 19 is connected to the immediate function of the time-lag selector and, on contact function, emits an immediate ignition signal.
  • This ignition system constitutes the most flexible. An ignition signal is, for example, emitted from the secondary impact sensor on "hard” impact, even if a time lag has been programmed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

Unité de munitions en forme de projectile, obus, missile ou semblable du genre qui comporte une charge creuse, une pointe solide renforcée (3, 6) qui sert à la pénétration mécanique de blindages réactifs et un système d'allumage disposé de manière que l'amorçage de la partie de la charge creuse ne soit pas déclenché avant que la tête renforcée ait écarté le blindage réactif. Ledit système d'allumage comprend alors un dispositif d'allumage électronique ou pyrotechnique à action retardée qui complète ou remplace un dispositif mécanique à action retardée disposé dans la partie avant de ladite unité de munitions.
EP90906401A 1989-04-06 1990-04-04 Unites de munitions ameliorees Withdrawn EP0465585A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8901203 1989-04-06
SE8901203A SE8901203D0 (sv) 1989-04-06 1989-04-06 Ammunition

Publications (1)

Publication Number Publication Date
EP0465585A1 true EP0465585A1 (fr) 1992-01-15

Family

ID=20375566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90906401A Withdrawn EP0465585A1 (fr) 1989-04-06 1990-04-04 Unites de munitions ameliorees

Country Status (5)

Country Link
EP (1) EP0465585A1 (fr)
CA (1) CA2051383A1 (fr)
FI (1) FI914697A0 (fr)
SE (1) SE8901203D0 (fr)
WO (1) WO1990012271A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9015198D0 (en) 1990-07-10 1990-08-29 Brien Caroline J O Binding substance
FR2718842B1 (fr) * 1994-04-15 1996-06-28 Luchaire Defense Sa Projectile destiné à agresser des cibles dures.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE416843B (sv) * 1977-04-19 1981-02-09 Bofors Ab Eltenddon med elektrisk fordrojningskrets
US4459914A (en) * 1982-05-17 1984-07-17 Caruso Anthony M Impact-detonated time delay fuse
SE446483B (sv) * 1985-01-31 1986-09-15 Bofors Ab Pansarsprenggranat, innefattande en rsv-laddning, med forsterkt spets for mekanisk penetration av aktivt pansar

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9012271A1 *

Also Published As

Publication number Publication date
WO1990012271A1 (fr) 1990-10-18
FI914697A7 (fi) 1991-10-04
SE8901203D0 (sv) 1989-04-06
FI914697A0 (fi) 1991-10-04
CA2051383A1 (fr) 1990-10-07

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Legal Events

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Owner name: SWEDISH ORDNANCE - FFV/BOFORS AB

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Effective date: 19930824