EP2840351A1 - Zerbrechliche Munition - Google Patents

Zerbrechliche Munition Download PDF

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Publication number
EP2840351A1
EP2840351A1 EP13275190.0A EP13275190A EP2840351A1 EP 2840351 A1 EP2840351 A1 EP 2840351A1 EP 13275190 A EP13275190 A EP 13275190A EP 2840351 A1 EP2840351 A1 EP 2840351A1
Authority
EP
European Patent Office
Prior art keywords
main body
payload
frangible
munition
fuze
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.)
Ceased
Application number
EP13275190.0A
Other languages
English (en)
French (fr)
Inventor
designation of the inventor has not yet been filed The
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.)
BAE Systems PLC
Original Assignee
BAE Systems PLC
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 BAE Systems PLC filed Critical BAE Systems PLC
Priority to EP13275190.0A priority Critical patent/EP2840351A1/de
Priority to NO14753149A priority patent/NO3036500T3/no
Priority to US14/913,040 priority patent/US9784544B2/en
Priority to AU2014310467A priority patent/AU2014310467B2/en
Priority to ES14753149.5T priority patent/ES2646272T3/es
Priority to PCT/GB2014/052528 priority patent/WO2015025143A1/en
Priority to EP14753149.5A priority patent/EP3036500B1/de
Publication of EP2840351A1 publication Critical patent/EP2840351A1/de
Ceased 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
    • F42B12/625—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles the submissiles being ejected parallel to the longitudinal axis of the projectile a single submissile arranged in a carrier missile for being launched or accelerated coaxially; Coaxial tandem arrangement of missiles which are active in the target one after the other
    • 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 invention relates to a frangible munition device, more particularly to a common carrier payload delivery shell, with a frangible safety link.
  • a frangible munition comprising a tail unit, a main body which comprises a payload cavity for receiving a payload, a fuze, and an explosive train operably connected to said fuze, located between said main body and the fuze, is a frangible ogive element, wherein the frangible ogive element and main body are retained in operable engagement by at least one frangible link, such that upon an impact, said frangible link is caused to fail; such that in the event of a blind and upon impact with the ground, said frangible link fails so as to allow venting of any pressure from any energetic events.
  • the frangible link may be any connection means, connector or fixing, which operably links the frangible ogive element to the main body, such that the munition is able to function in the intended designed mode, but which is severable or shearable upon application of a substantial force.
  • the frangible link may, such as, for example be a shearable thread or at least one shear pin which retains said main body and frangible ogive element in an operable engagement.
  • the use of a shearble thread allows the frangible ogive element to be reversibly operably engaged with the main body.
  • the frangible ogive element and main body may comprise cooperatively engaging male and female threaded portions, wherein at least one of the threads is a shearable thread.
  • the use of a shearable thread allows the frangible ogive element to be readily fitted and removed without damaging the shearable linkage.
  • the main body threaded portion may be manufactured from a first material, and the ogive threaded portion may be manufactured from second material, wherein the second material has a lower hardness value than the first material, such that upon an applied force, such as, for example impact with the ground after a blind, the lower hardness material readily undergoes plastic deformation such that the frangible ogive element disengages from the main body.
  • the first material is selected from a steel alloy and the second material is selected from aluminium or alloy thereof.
  • the forces experienced during launch will place the shell under uniform compression, however impact with the ground, typically at an incident angle will place the frangible ogive element and main body under a tensile load or shearing load, forcing said frangible link to fail, hence allowing venting of any gaseous outputs.
  • the failure of the frangible link may be substantial or even cause detachment of the frangible ogive element from the main body.
  • the extent of the failure is such that if the explosive train or expulsion charge where to function, after said frangible link has failed that the output may be unconfined i.e. vented, and reduce the severity of the event.
  • the extent of any energetic material event may be reduced such that there is a reduced pressure build up and may not cause the primary payload to be ejected from the shell, or may not cause the primary payload to function.
  • the payload may be any commonly used payload such as, for example high explosives, illumination, smokes, decoys, chaff or a UAV.
  • the payload and payload cavity are selected such that they are preferably of a uniform dimension, such that any payload may be readily inserted into the uniform payload cavity of the munition.
  • the payload is a modular unit. This allows flexibility on logistics, that any payload may be inserted into any available carrier munition or shell.
  • Conventional smoke and illumination payloads have bespoke shells or munitions and there is no interchangeability between munitions.
  • frangible ogive element may be used in combination with a tail unit that is attached to the main body by a further shearable thread.
  • the payload may be inserted into the payload cavity from the aft end of the munition.
  • the payload may be slidably engaged with the payload cavity, such as for example it may have an engineering fit with payload cavity, such that the payload may be prevented from moving within a direction which is normal to the elongate axis of the munition.
  • the payload cavity may have substantially parallel walls, which extend from the intersection of main body and tail unit up to a locking ring.
  • the locking ring may be located between the main body and said frangible ogive element, to retain said payload within the payload cavity and prevent movement.
  • the locking ring and main body comprise cooperatively engaging threaded portions, to allow reversible locking engagement. This allows the locking ring to compensate for any tolerances in manufacture of the payload, to ensure that the payload is retained in position.
  • the locking ring or the main body of the shell may provide the frangible link with the frangible ogive element.
  • the further shearable thread allows the payload to be reversibly loaded from the aft of the main body.
  • Prior art shells secure the tail unit to the main body with shearable pins, which irreversibly fasten the tail unit to the main body, such that once the munition is constructed the tail unit may only be removed by action of the device or by applying substantial force, to cause shearing of the pins.
  • the use of a further shearable thread allows the tail unit to be readily fitted and removed without damaging the shearable linkage. It is therefore possible to remove the payload for routine inspection or to fill with a new payload in active theatre.
  • the payload is reversibly loadable from the aft end of the main body.
  • the provision of a threaded tail unit allows the payload to be loaded and removed from the aft end.
  • the payload is capable of being dispensed rearwardly from the main body, upon shearing the further shearable thread.
  • the frangible ogive element is a portion of the munition, typically a shell body, and may be reversibly operably engaged with the fuze and main body.
  • the frangible ogive element, main body and tail unit are secured together by shearable threads and further shearable threads, respectively.
  • the frangible ogive element may have a forward end locatable with said fuze and an aft end locatable with said main body, wherein the internal diameter of the aft end of said frangible ogive element may be such that it screws down on the same thread as that of the locking ring.
  • the locking ring secures the payload within the body of the shell.
  • the fuze may be any known fuze, such as those that respond to selected input or stimuli or a combination of inputs, such as, for example, mechanical actions of the projectile, such as the action of high g forces from gun launch or high spin rates from imparted spin, timed delay, either mechanical or pyrotechnic, caused by separation from the launch system, or proximity to a target.
  • the fuze may function due to electronic activation, such as, for example, from an input from a sensor or detector from on-board said munition or external to the munition.
  • On-board systems may be internal guidance systems.
  • External stimuli may be provided such as, for example by fly-by wire, remote control, GPS or target activated laser guidance.
  • the fuze may be operably connected to an explosive train, to provide an energetic output, such as an expulsion charge or detonative output.
  • an energetic output such as an expulsion charge or detonative output.
  • the payload may be expelled from the munition by an expulsion charge.
  • said expulsion charge is suspended in free space within the frangible ogive element, such that it does not physically contact the payload; this allows for any errors in manufacturing tolerances between the expulsion charge and the payload.
  • the fuze device may comprise safety and arming units (SAU), explosive trains to provide sufficient stimuli to the expulsion charge.
  • SAU safety and arming units
  • the further shearable threaded portion has a lower shear strength than the shearable thread, such that during the intended use of the munition the further shearable thread between the tail unit and main body fails first, so as to permit the expulsion of the charge from the aft of the main body.
  • a method of dispensing a payload from a munition as defined herein comprising the steps of causing initiation of the expulsion charge, causing shearing of the further shearable thread.
  • a shell 1 with a main body 5, which is manufactured from a steel alloy. Located around the circumference of the main body 5 is a copper driving band 4, which allows engagement with the rifling on the bore of a barrel, so as to impart spin.
  • a tail unit 2 is located at the aft of the main body 5.
  • the tail unit 2 is made from aluminium and contains a male threaded portion 3, which engages with a reciprocal female threaded portion (not shown) located in the aft of the main body 5.
  • the payload 10 (shown external to the shell 1), when located in the payload cavity (not shown), inside the main body, is retained in place by use of a locking ring 6, which screws into the forward end of main body 5.
  • the frangible ogive element 7 has a frangible link 7a, in the form of an aluminium thread.
  • the frangible ogive element 7 may be secured to the locking ring 6 or directly to the main body 5.
  • the frangible ogive element receives the expulsion charge 8 and fuze 9.
  • the expulsion charge 8 builds up pressure within the frangible ogive element and at the bursting pressure the thread 3 shears and the payload 10 is expelled from the aft of the main body 5.
  • the shell 1 During a blind event, the shell 1 would not function as detailed above, and would hit the ground, wherein the frangible link 7a would be caused to fail, such that if fuze 9 did erroneously function, that the expulsion charge 8 would be at least partially vented and would not cause the payload 10 to be expelled from the shell 1.
  • Figure 2 shows an illumination shell 20, with a main body 24 formed from a steel alloy, with a driving band 26 located thereupon.
  • a tail unit 12 is located at the aft of the main body 24.
  • the tail unit 12 is made from aluminium and contains a male threaded portion 13, which engages with a reciprocal female threaded portion 14 located at the aft of the main body 24.
  • the payload 22 is located in the payload cavity 15, and is retained in place by use of a locking ring 16, which screws into the forward end of main body 24.
  • the payload 22 is a modular illumination or smoke payload, (contents not shown) which slides into the payload cavity 15.
  • the frangible ogive element 17 has a frangible link 17a, in the form of an aluminium thread, which is fastened to the locking ring 16.
  • the frangible ogive element receives the expulsion charge 18 and fuze 19.
  • the expulsion charge 18 builds up pressure within the frangible ogive element and at the bursting pressure the thread 13 shears and the payload 22 is expelled from the aft of the main body 24.
  • the expulsion charge 18 Upon operation of the fuze 19, the expulsion charge 18 builds up pressure within the frangible ogive element 17 and at the bursting pressure the thread 13 shears and the payload 22 is expelled from the aft of the main body 24.
  • the fuze 19 would not function as detailed above, and the shell 20 would hit the ground, wherein the frangible link 17a would be caused to fail. Therefore if the fuze 19 did erroneously function, the expulsion charge 18 would be at least partially vented via the failed frangible link and would not cause the payload 22 to be expelled from the shell 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
EP13275190.0A 2013-08-20 2013-08-20 Zerbrechliche Munition Ceased EP2840351A1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP13275190.0A EP2840351A1 (de) 2013-08-20 2013-08-20 Zerbrechliche Munition
NO14753149A NO3036500T3 (de) 2013-08-20 2014-08-18
US14/913,040 US9784544B2 (en) 2013-08-20 2014-08-18 Frangible munition
AU2014310467A AU2014310467B2 (en) 2013-08-20 2014-08-18 Frangible munition
ES14753149.5T ES2646272T3 (es) 2013-08-20 2014-08-18 Munición frangible
PCT/GB2014/052528 WO2015025143A1 (en) 2013-08-20 2014-08-18 Frangible munition
EP14753149.5A EP3036500B1 (de) 2013-08-20 2014-08-18 Zerbrechliche munition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13275190.0A EP2840351A1 (de) 2013-08-20 2013-08-20 Zerbrechliche Munition

Publications (1)

Publication Number Publication Date
EP2840351A1 true EP2840351A1 (de) 2015-02-25

Family

ID=49083615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13275190.0A Ceased EP2840351A1 (de) 2013-08-20 2013-08-20 Zerbrechliche Munition

Country Status (1)

Country Link
EP (1) EP2840351A1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB143281A (en) * 1918-08-12 1920-05-27 Louis Bourguignon Improvements relating to message-carrying shells
US3842741A (en) * 1973-06-07 1974-10-22 Us Army Subprojectile launched from telescopic tubes
FR2699659A1 (fr) * 1992-12-18 1994-06-24 Giat Ind Sa Dispositif de liaison cisaillable entre un tronçon avant et un tronçon arrière d'une munition.
US5347931A (en) * 1992-11-12 1994-09-20 Thiokol Corporation Combustible flare ignition system
US20040107860A1 (en) * 2002-12-04 2004-06-10 Denel (Proprietary) Limited Opening and closing a container
US6782829B1 (en) * 2003-12-04 2004-08-31 The United States Of America As Represented By The Secretary Of The Army Non-lethal cargo projectile
US20050223930A1 (en) * 2003-12-19 2005-10-13 Bootes Thomas H Multi-mission payload system
US7360489B1 (en) * 2005-04-12 2008-04-22 The United States Of America As Represented By The Secretary Of The Army Non-lethal cargo projectile

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB143281A (en) * 1918-08-12 1920-05-27 Louis Bourguignon Improvements relating to message-carrying shells
US3842741A (en) * 1973-06-07 1974-10-22 Us Army Subprojectile launched from telescopic tubes
US5347931A (en) * 1992-11-12 1994-09-20 Thiokol Corporation Combustible flare ignition system
FR2699659A1 (fr) * 1992-12-18 1994-06-24 Giat Ind Sa Dispositif de liaison cisaillable entre un tronçon avant et un tronçon arrière d'une munition.
US20040107860A1 (en) * 2002-12-04 2004-06-10 Denel (Proprietary) Limited Opening and closing a container
US6782829B1 (en) * 2003-12-04 2004-08-31 The United States Of America As Represented By The Secretary Of The Army Non-lethal cargo projectile
US20050223930A1 (en) * 2003-12-19 2005-10-13 Bootes Thomas H Multi-mission payload system
US7360489B1 (en) * 2005-04-12 2008-04-22 The United States Of America As Represented By The Secretary Of The Army Non-lethal cargo projectile

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