EP2923171B1 - Projectile gyrostabilise projetant une charge utile - Google Patents

Projectile gyrostabilise projetant une charge utile Download PDF

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Publication number
EP2923171B1
EP2923171B1 EP13820785.7A EP13820785A EP2923171B1 EP 2923171 B1 EP2923171 B1 EP 2923171B1 EP 13820785 A EP13820785 A EP 13820785A EP 2923171 B1 EP2923171 B1 EP 2923171B1
Authority
EP
European Patent Office
Prior art keywords
piston
payload
projectile
projectiles
sub
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.)
Active
Application number
EP13820785.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2923171A1 (fr
Inventor
Nicolas Caillaut
Cédric MARTINON
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
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Publication date
Application filed by Nexter Munitions SA filed Critical Nexter Munitions SA
Publication of EP2923171A1 publication Critical patent/EP2923171A1/fr
Application granted granted Critical
Publication of EP2923171B1 publication Critical patent/EP2923171B1/fr
Active 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
    • 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
    • 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

Definitions

  • the technical field of the invention is that of the gyrostabilized projectiles comprising a body containing a payload formed of a set of sub-projectiles dispersible trajectory by a pyrotechnic charge.
  • projectiles are usually medium caliber projectiles (caliber between 20mm and 70mm) and are used as part of the anti-aircraft defense.
  • Sub-projectiles are usually metal spheres or cylinders, such as steel or tungsten.
  • the dispersion of the sub-projectiles in front of a target makes it possible to destroy the latter.
  • the bullet of the projectile Prior to the expulsion, the bullet of the projectile is cracked and opens in petals following the action of another pyrotechnic device.
  • the sub-projectiles are housed in several one-piece buckets stacked on top of each other from the rear of the shell body into the warhead.
  • a rear piston is attached to the shell body and pushes the godets out of the body once the warhead and its contents ejected.
  • the body casing is sheared radially at the bulkhead and the body opens at the rear along longitudinal breakouts.
  • the object of the invention is to provide a projectile architecture of simple design and yet reliably ensuring axial and forward ejection of the sub-projectiles. Thanks to the invention this ejection is carried out with a speed which is increased relative to the residual velocity of the projectile. About 40m / s are also provided on a speed of the order of 500 to 800 m / s, an increase of 5% to 8% in the speed of the sub-projectiles.
  • the subject of the invention is a gyro-stabilized projectile according to claim 1.
  • the piston will have an external profile corresponding to that of the inner housing of the body.
  • the external profile of the piston may for example be hexagonal.
  • the piston may have a thickness of between 7.5 mm and 10 mm.
  • the front thrust plate may include an internal cavity having a hexagonal profile and receiving the payload.
  • the projectile may include a bearing ring which will be integral with the body and on which the piston will be supported.
  • a projectile 1 according to one embodiment of the invention comprises a body 2 which is closed at its front by a ballistic ogive 3 and at its rear by a base 4 screwed to the body 2.
  • the body 2 has an inner housing 12 which encloses a payload 5 which is formed of a set of trajectory-dispersible sub-projectiles 6.
  • the sub-projectiles 6 are steel or tungsten cylinders which are stacked in columns.
  • the inner housing 12 of the latter has a hexagonal profile conforming to the contour of the cylindrical sub-projectiles.
  • This hexagonal profile is the most suitable for driving cylindrical columns.
  • Other shapes would of course be possible, for example cylindrical grooves regularly distributed angularly and each corresponding to a sub-projectile column.
  • the hexagonal profile of the housing 12 has rounded grooves 12a at the vertices of the hexagon. These grooves 12a extend over the entire length of the body 2 and have a radius of curvature equal to that of the cylindrical sub-projectiles 6.
  • the housing 12 has a groove 12b at each middle of the sides of the hexagon. These grooves 12b extend over the entire length of the body 2 and each open onto a cylindrical profile 12c receiving a sub-projectile column 6.
  • each side of the hexagonal profile of the housing 12 comprises three sub-projectiles 6.
  • the column of the sub-projectiles 6 located in the middle of each side is thus maintained by a groove 12b.
  • the base 4 encloses a rocket 7 which comprises in a conventional manner a safety and arming device and a detonator 8, the initiation of which is controlled by a programmable electronic module 9.
  • This relay 10 is a detonating pyrotechnic charge which is initiated by the shock wave coming from the detonator 8 and which reacts in detonation.
  • detonation is meant a self-sustaining exothermic chemical reaction in which a shock wave precedes the reaction front and travels at a speed greater than the sonic velocity of the composition.
  • a detonation velocity is of the order of several thousand meters per second.
  • Detonation relays are typically used to detonate an explosive charge, such as a shell.
  • a relay 10 formed of compressed hexogen can be used.
  • a gas generating composition is initiated in combustion, that is to say with a reaction rate of a few meters per second. It is the same for a propellant powder whose reaction rate is of the order of a few tens of meters per second.
  • the detonation relay 10 is separated from the payload 5 by a piston 11 which is slidably mounted in the body 5.
  • the piston will have a hexagonal outer profile to follow the hexagonal profile of the housing 12 of the body 2 and be rotated with the projectile which avoids the problems of gyroscopic instability.
  • the housing 12 has another shape of profile, for example cylindrical grooves evenly spaced angularly, the piston 11 will have a profile corresponding to that of the housing 12 to be able to slide in the latter and be integral in rotation with the body 2.
  • the payload 5 is disposed between the piston 11 and a front thrust plate 14 which is itself bearing against a shoulder 13 of the ogive 3.
  • the thrust plate 14 has a bucket shape and therefore has a cavity internal wall delimited by a thin wall 20.
  • the wall 20 is interposed between the ogive 3 and the payload 5.
  • This wall 20 is cylindrical and in contact with the ogive and the inner surface of this wall 20 has a hexagonal profile similar to that of the housing 12 of the body. It is through this profile that the thrust plate 14 is rotated by the payload 5. Such an arrangement ensures the stability of the projectile in flight by avoiding a rotation of the thrust plate 14 relative to the payload 5.
  • the warhead 3 is fixed to the body 2 by a thread 15. It comprises a rupture groove 17 which will shear during the operation of the detonation relay 10 and allow the front ejection of the payload 5.
  • the piston 11 has a clearance 16 which caps and surrounds the detonation relay 10. The latter is therefore not directly in contact with the piston 11. Such an arrangement makes it possible not to damage the piston 11 during the operation of the relay. detonation 10.
  • This clearance is essential for the proper operation of the frontal ejection by detonation. It has a depth of between 2 and 4mm.
  • a support ring 18 is placed between the piston 11 and the rocket 7, its function is to recover the inertial forces of the payload 5 which apply to the piston 11 during firing. This makes it possible not to damage the rocket 7.
  • This support ring 18 may be optional in the case where the recovery of the inertial forces of the payload 5 is ensured by a support of the piston 11 directly on a body of the body 2 of the projectile (scope not shown which would be arranged in place and place of the ring 18).
  • the piston 11 is then introduced into the body 2 by the front of the latter until it bears on the support ring 18, then the payload 5 is introduced into the body 2. It will be possible for this purpose, to make the sub-projectiles 6 fast with each other temporarily, for example with a plastic film surrounding the sub-projectile stacks 6.
  • the front thrust plate 14 is then positioned on the payload 5 with the interposition of one or more axial pitching sheets 19, then the warhead 3 is screwed and glued onto the body 2 of the projectile.
  • the base 4 enclosing the rocket and carrying the detonation relay 10 is finally screwed to the rear part of the body 2.
  • the detonator 8 is initiated by the electronic module 9. It causes the detonation of the relay 10.
  • the shock wave from the relay 10 will cause the projection of the piston 11 towards the front of the projectile. This shock wave propagates through the piston 11, the payload 5 and the plug 14. It is sufficient to shear the rupture groove 17 of the nose 3 and also ensures the projection of the entire payload 5 through the front opening of the warhead 3 thus sheared.
  • the piston In order to avoid any deformation or destruction of the piston 11 by impact, the piston will be given a thickness of between 7.5 mm and 10 mm.
  • the shear of the ogive 3 is obtained reliably and quickly by the sole effect of the shock wave.
  • the tests have shown that the shock also makes it possible to eject the payload axially without it being necessary to cut the body longitudinally and without the relative sealing between the piston 11 and the body 2 being necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Radar Systems Or Details Thereof (AREA)
EP13820785.7A 2012-11-23 2013-11-22 Projectile gyrostabilise projetant une charge utile Active EP2923171B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1203211A FR2998659B1 (fr) 2012-11-23 2012-11-23 Projectile gyrostabilise projetant une charge utile
PCT/FR2013/052823 WO2014080136A1 (fr) 2012-11-23 2013-11-22 Projectile gyrostabilise projetant une charge utile

Publications (2)

Publication Number Publication Date
EP2923171A1 EP2923171A1 (fr) 2015-09-30
EP2923171B1 true EP2923171B1 (fr) 2018-01-03

Family

ID=48468361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13820785.7A Active EP2923171B1 (fr) 2012-11-23 2013-11-22 Projectile gyrostabilise projetant une charge utile

Country Status (7)

Country Link
US (1) US9423226B2 (pt)
EP (1) EP2923171B1 (pt)
ES (1) ES2658992T3 (pt)
FR (1) FR2998659B1 (pt)
NO (1) NO2923171T3 (pt)
PT (1) PT2923171T (pt)
WO (1) WO2014080136A1 (pt)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9354027B2 (en) 2013-10-24 2016-05-31 G2 Research Inc. Fragmenting projectile
EP3105538B1 (en) * 2014-02-11 2017-09-27 Raytheon Company Munition comprising a penetrator and an external harness
US10663271B2 (en) 2016-10-13 2020-05-26 G2 Research Inc. Predictably fragmenting projectiles having internally-arranged geometric features
SE545173C2 (en) * 2017-11-28 2023-05-02 Bae Systems Bofors Ab Spin stabilized projectile and method for providing a horizontal dispersion pattern
DE102018104333A1 (de) * 2018-02-26 2019-08-29 Rwm Schweiz Ag Geschoss mit pyrotechnischer Wirkladung
DE102018129786B4 (de) * 2018-11-26 2022-03-03 Rheinmetall Waffe Munition Gmbh Erprobungs- und/oder Übungsmunition
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
FR3100610B1 (fr) * 2019-09-06 2023-11-03 Cta Int Obus anti-aérien pour munition télescopée à double déverrouillage
US11761739B2 (en) * 2020-09-20 2023-09-19 Nl Enterprises, Llc Projectile construction, launcher, and launcher accessory
CA3240112A1 (en) * 2021-12-08 2024-02-08 Christopher Pedicini Projectile construction, launcher, and launcher accessory

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH85741A (de) * 1919-10-06 1920-07-01 Maschinenbauansta Hanseatische Geschoss.
GB460516A (en) * 1935-06-27 1937-01-27 Giuseppe Pietro Ottino Improvements in shrapnel shells
US3802345A (en) * 1962-05-02 1974-04-09 Aai Corp Multiple projectile sabot assembly for use in rifled barrel
US3954060A (en) 1967-08-24 1976-05-04 The United States Of America As Represented By The Secretary Of The Army Projectile
DE2359758C1 (de) * 1973-11-30 1988-07-28 Buck Chemisch-Technische Werke GmbH & Co, 7347 Bad Überkingen Infrarot-Störstrahler
US4444117A (en) * 1981-03-30 1984-04-24 The Boeing Company Stacked tube submunition dispenser
CH688727A5 (de) 1994-08-26 1998-01-30 Contraves Pyrotec Ag Drallstabilisiertes Geschoss mit einer Nutzlast.
ES2264958T3 (es) * 2001-11-28 2007-02-01 Rheinmetall Waffe Munition Gmbh Proyectiles con elevado efecto de penetracion y lateral con dispositivo de disgregacion integrado.
US7210410B1 (en) * 2006-03-29 2007-05-01 Widener Charles D Multi-projectile less lethal and breaching ammunition
FR2980843B1 (fr) * 2011-10-03 2014-06-13 Nexter Munitions Projectile gyrostabilise

Also Published As

Publication number Publication date
FR2998659B1 (fr) 2017-06-23
PT2923171T (pt) 2018-01-17
US20150308803A1 (en) 2015-10-29
FR2998659A1 (fr) 2014-05-30
EP2923171A1 (fr) 2015-09-30
NO2923171T3 (pt) 2018-06-02
WO2014080136A1 (fr) 2014-05-30
US9423226B2 (en) 2016-08-23
ES2658992T3 (es) 2018-03-13

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