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EP4008992A1 - Kreiselstabilisiertes geschoss - Google Patents

Kreiselstabilisiertes geschoss Download PDF

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Publication number
EP4008992A1
EP4008992A1 EP21210418.6A EP21210418A EP4008992A1 EP 4008992 A1 EP4008992 A1 EP 4008992A1 EP 21210418 A EP21210418 A EP 21210418A EP 4008992 A1 EP4008992 A1 EP 4008992A1
Authority
EP
European Patent Office
Prior art keywords
projectile
bucket
piston
sectors
longitudinal axis
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
EP21210418.6A
Other languages
English (en)
French (fr)
Other versions
EP4008992B1 (de
Inventor
Anthony Forge
Sylvain Jayet
Nicolas Caillaut
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.)
Nexter Munitions SA
Original Assignee
Nexter Munitions 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 Nexter Munitions SA filed Critical Nexter Munitions SA
Publication of EP4008992A1 publication Critical patent/EP4008992A1/de
Application granted granted Critical
Publication of EP4008992B1 publication Critical patent/EP4008992B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F42B12/36—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
    • F42B12/62—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles the submissiles being ejected parallel to the longitudinal axis of the projectile
    • 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
    • F42B12/62—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles the submissiles being ejected parallel to the longitudinal axis of the projectile
    • F42B12/64—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles the submissiles being ejected parallel to the longitudinal axis of the projectile the submissiles being of shot- or flechette-type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/02—Stabilising arrangements
    • F42B10/26—Stabilising arrangements using spin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container

Definitions

  • the technical field of the invention is that of gyrostabilized projectiles comprising a body containing a payload formed of a set of sub-projectiles dispersible on trajectory by a pyrotechnic charge and in particular medium caliber projectiles (caliber between 20mm and 70mm ) used in anti-aircraft defense.
  • a gyrostabilized projectile comprising a body containing a cup filled with a set of sub-projectiles.
  • the bucket is expelled on a trajectory with the sub-projectiles by the action of a piston pushed by a pyrotechnic charge attached to a base in the rear part of the body.
  • the body carries in its front part a ballistic warhead which closes the bucket.
  • the warhead is linked to the body of the projectile at the level of its periphery by a fragile connection, calibrated at breakage, and capable of breaking when the piston pushes the cup against the warhead at the time of the expulsion of the sub-projectiles.
  • the invention therefore proposes to solve a problem of the solidity of the connection between a warhead and a projectile body ejecting a payload by pyrotechnic action.
  • the invention thus relates to a gyro-stabilized projectile comprising a hollow body carrying a payload formed of a set of sub-projectiles, inert and dispersible on trajectory, which are contained in a cup which carries a piston which closes one of its ends.
  • the body comprising at its rear part a base housing a pyrotechnic charge separated from the sub-projectiles by the piston which can translate relative to the projectile body to push the cup and the sub-projectiles axially out of the body, the single cup being substantially cylindrical and of diameter corresponding to that of a cylindrical bore internal to the body, the bucket being formed by the assembly of at least two sectors, independent of each other and contiguous along their edges parallel to the longitudinal axis of the projectile , projectile characterized in that the piston is integral with the sectors when they are contained in the body and in that the bucket is made integral with the body p ar a weakened connection means which is sized to break under the force of the piston pushed by the gases from the pyrotechnic charge, a warhead being secured to the bucket by means of securing means coaxial with the longitudinal axis of the projectile and which is blocked by the sectors of the bucket.
  • the weakened connecting means may comprise screws connecting the projectile body and the piston, screws comprising a section calibrated to rupture.
  • the screws may be oriented radially to the longitudinal axis of the projectile.
  • each screw can also pass through a sector to link it to the piston.
  • the screws may be oriented parallel to the longitudinal axis of the projectile.
  • the weakened connection means may comprise a sleeve screwed into a bore of the rear face of the piston, sleeve comprising a shoulder arranged in such a way that a part of the body is pinched between the shoulder and the face back of the piston, thus securing the bucket to the body, the sleeve comprising a zone weakened and calibrated to fracture in tension.
  • the means for securing the ogive to the bucket may comprise a polygonal head screw, the front ends of the sectors of the bucket being joined around the polygonal head so as to form an embedding with the latter. when the cup is in the body of the projectile, the separation of the sectors releasing the head.
  • the warhead can be screwed onto the screw and have its periphery resting on the body of the projectile.
  • the projectile may comprise at least one key engaged in a housing of corresponding shape located between each sector of the bucket and the body of the projectile to link said sector of the bucket and the body in rotation around the longitudinal axis of the projectile without impeding the ejection of the bucket from the body.
  • a medium caliber projectile 1 (caliber between 20 mm and 70 mm) comprises a hollow body 2 comprising at its rear part a base 3.
  • the front part of the body 2 is closed by a ballistic warhead 4.
  • the hollow body 2 comprises a cavity 2a substantially cylindrical opening onto the front of the body 2, cavity which contains a cup 5 of corresponding shape.
  • Bucket 5 is filled with inert sub-projectiles 11 forming a payload that can be dispersed on trajectory as we will see later.
  • the bucket 5 comprises sectors 5a independent of each other and contiguous along their edges parallel to the longitudinal axis X of the projectile 1. There are three sectors here.
  • the rear end of bucket 5 carries a piston 5b which closes off its rear part.
  • the sectors 5a are joined around a polygonal head 6a of a screw 6, coaxial with the projectile 1, so as to form a recess of the screw 6 relative to the cup 5.
  • the screw 6 forms a means 6 for securing the bucket 5 with the warhead 4.
  • the threaded part of the screw 6 makes it possible to screw the warhead 4 until its rim 4a bears against the front edge of the body 2 .
  • each sector 5a of bucket 5 and body 2 of projectile 1 at least one key 7 is engaged in a housing 14 of corresponding shape (housing shared between the body 2 and the sector 5a considered).
  • the keys 7 make it possible to link the cup 5 and the body 2 in rotation around the longitudinal axis X of the projectile 1.
  • each key 7 is oriented parallel to the longitudinal axis X of the projectile 1 so as not to hinder the ejection by sliding of the bucket 5 out of the body 2.
  • the bucket 5 is secured to the body 2 by means of screws 8 arranged radially to the longitudinal axis X of the projectile.
  • the screws 8 form a securing means and penetrate into the body 2 as well as into the piston 5b while crossing the sectors 5a, thus linking each sector 5a to the piston 5b.
  • the warhead 4 is fixed in a robust manner to the body 2 by means of the bucket 5 which transfers any shock stresses undergone by the warhead 4 towards the inside of the projectile, in areas where the connection with the body is less vulnerable.
  • the screws 8 constitute weakened connection means because they comprise a shear weakening zone 8a located at the junction between the bucket 5 and the body 2 giving a shearable nature to the connection means 8 which is not disturbed by shocks radial on the ogive 4 for example.
  • the embrittlement zone comprises for example a calibrated section 8a in order to break consecutively upon reaching a stress threshold obtained by the thrust of the piston 5b undergoing the pressure of the gases resulting from the initiation of a pyrotechnic charge 10, charge located behind the piston 5b, in a chamber 3a at the base 3 of the projectile 1.
  • the piston 5b comprises a shoulder 5c on which the rear ends of the sectors 5a rest, this which allows it, once the screws 8 have been broken, to push the sectors 5a, the sub-projectiles 11 and the warhead 4 forward of the body 2 in the direction of the trajectory of the projectile 1 as shown in figure 5 .
  • the sub-projectiles 11 are also released and are distributed in the surrounding space under the effect of centrifugal forces in order to bring their kinetic effects to a target not shown, kinetic effects due to the speed of the projectile 1 added to the projection speed provided by the thrust of the piston 5b.
  • the sub-projectiles 11 are represented before their dispersion.
  • the weakened connection means 8 are still screws 8 but they are oriented parallel to the longitudinal axis X of the projectile 1 and secure a rear part of the body 2 to a rear face of the piston 5b.
  • the weakened connection means will therefore be sized to break consecutively to a tensile stress generated by the pressure of the gases from the load 10.
  • the sectors 5a of the bucket 5 are fixed to the piston by pins 12.
  • the pins 12 are cylindrical and do not have no protuberance at their end, which allows easy detachment of the sectors 5a relative to the piston 5 once the cup 5 has been ejected from the body 2 as at the figure 5 .
  • the sliding fit of the bucket 5 relative to the body 2 prevents any detachment of the sectors relative to the piston 5b. A monolithic assembly is thus obtained connecting the warhead 4 to the body of the projectile in a robust manner.
  • the weakened connecting means 8 comprises a sleeve 8 screwed into a bore in the rear face of the piston 5b and which comprises a shoulder arranged in such a way that a part of the body 2 is clamped between the shoulder 8b and the rear face of the piston 5b, thus securing cup 5 with body 2.
  • the sleeve 8 has a zone weakened and calibrated to rupture in tension so that the bucket 5 can be ejected once the threshold pressure has been reached in the chamber 3a.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Gyroscopes (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP21210418.6A 2020-12-02 2021-11-25 Drallstabilisiertes geschoss Active EP4008992B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2012455A FR3116894B1 (fr) 2020-12-02 2020-12-02 Projectile gyrostabilisé

Publications (2)

Publication Number Publication Date
EP4008992A1 true EP4008992A1 (de) 2022-06-08
EP4008992B1 EP4008992B1 (de) 2023-05-03

Family

ID=75108435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21210418.6A Active EP4008992B1 (de) 2020-12-02 2021-11-25 Drallstabilisiertes geschoss

Country Status (8)

Country Link
US (1) US11650035B2 (de)
EP (1) EP4008992B1 (de)
ES (1) ES2951149T3 (de)
FI (1) FI4008992T3 (de)
FR (1) FR3116894B1 (de)
IL (1) IL288546B1 (de)
PL (1) PL4008992T3 (de)
PT (1) PT4008992T (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102589075B1 (ko) * 2023-03-13 2023-10-12 최종태 스마트 포탄

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954060A (en) * 1967-08-24 1976-05-04 The United States Of America As Represented By The Secretary Of The Army Projectile
EP0152725A2 (de) * 1984-01-20 1985-08-28 Simmel Difesa S.R.L. Einrichtung zur Verhinderung der Verformung von Artilleriegeschossen
FR2952424A1 (fr) * 2009-11-09 2011-05-13 Nexter Munitions Obus non letal de gros calibre stabilise en rotation
EP2578987A1 (de) 2011-10-03 2013-04-10 Nexter Munitions Drallstabilisiertes Geschoss

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767656A (en) * 1951-08-22 1956-10-23 Richard J Zeamer Canister loading using stacked cylinders
US3956990A (en) * 1964-07-31 1976-05-18 The United States Of America As Represented By The Secretary Of The Army Beehive projectile
US4430941A (en) * 1968-05-27 1984-02-14 Fmc Corporation Projectile with supported missiles
US3981244A (en) * 1972-02-28 1976-09-21 The United States Of America As Represented By The Secretary Of The Army Pyramid projectile payload ejection device
DE2824203A1 (de) * 1978-06-02 1979-12-06 Diehl Gmbh & Co Geschoss mit einem bergbaren zuender
US4221167A (en) * 1978-10-16 1980-09-09 The United States Of America As Represented By The Secretary Of The Army Delay burster for a projectile
DE3629668C1 (de) * 1986-08-30 1988-03-10 Rheinmetall Gmbh Drallstabilisiertes Bomblettraegergeschoss
US6874425B1 (en) * 2001-05-18 2005-04-05 Day & Zimmermann, Inc. Projectile carrying sub-munitions
FR2954485B1 (fr) * 2009-12-21 2012-05-11 Nexter Munitions Dispositif de lancement pour projectile d'artillerie sous calibre.
US8931416B2 (en) * 2013-03-07 2015-01-13 The United States Of America As Represented By The Secretary Of The Navy Inert and pressure-actuated submunitions dispensing projectile
US10466023B2 (en) * 2018-03-28 2019-11-05 Ascendance International, LLC Long range large caliber frangible round for defending against UAV'S
US11561075B2 (en) * 2018-12-13 2023-01-24 The United States Of America, As Represented By The Secretary Of The Navy Projectile with pyrotechnically timed release of a secondary payload
US10703451B1 (en) * 2018-12-22 2020-07-07 Richard D Adams Countermeasures apparatus and method
US11118865B2 (en) * 2019-03-12 2021-09-14 P2K Technologies LLC Ammunition for engaging unmanned aerial systems
US20200300591A1 (en) * 2019-03-21 2020-09-24 Corvid Technologies LLC Warheads and weapons and methods including same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954060A (en) * 1967-08-24 1976-05-04 The United States Of America As Represented By The Secretary Of The Army Projectile
EP0152725A2 (de) * 1984-01-20 1985-08-28 Simmel Difesa S.R.L. Einrichtung zur Verhinderung der Verformung von Artilleriegeschossen
FR2952424A1 (fr) * 2009-11-09 2011-05-13 Nexter Munitions Obus non letal de gros calibre stabilise en rotation
EP2578987A1 (de) 2011-10-03 2013-04-10 Nexter Munitions Drallstabilisiertes Geschoss

Also Published As

Publication number Publication date
US20220170724A1 (en) 2022-06-02
PL4008992T3 (pl) 2023-05-29
FI4008992T3 (fi) 2023-06-07
FR3116894B1 (fr) 2022-10-28
FR3116894A1 (fr) 2022-06-03
IL288546A (en) 2022-07-01
IL288546B1 (en) 2024-10-01
ES2951149T3 (es) 2023-10-18
PT4008992T (pt) 2023-05-31
US11650035B2 (en) 2023-05-16
EP4008992B1 (de) 2023-05-03

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