EP0180515B2 - Dispositif pour réduire la trainée des munitions et munitions aptes à le recevoir - Google Patents

Dispositif pour réduire la trainée des munitions et munitions aptes à le recevoir Download PDF

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Publication number
EP0180515B2
EP0180515B2 EP85402061A EP85402061A EP0180515B2 EP 0180515 B2 EP0180515 B2 EP 0180515B2 EP 85402061 A EP85402061 A EP 85402061A EP 85402061 A EP85402061 A EP 85402061A EP 0180515 B2 EP0180515 B2 EP 0180515B2
Authority
EP
European Patent Office
Prior art keywords
projectile
casing
base
cover
ammunition
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.)
Expired - Lifetime
Application number
EP85402061A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0180515A1 (fr
EP0180515B1 (fr
Inventor
Michel Schilling
Marc Reuche
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.)
SOMIL ARMEMENT
Original Assignee
Luchaire 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9308998&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0180515(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Luchaire SA filed Critical Luchaire SA
Priority to AT85402061T priority Critical patent/ATE37603T1/de
Publication of EP0180515A1 publication Critical patent/EP0180515A1/fr
Publication of EP0180515B1 publication Critical patent/EP0180515B1/fr
Application granted granted Critical
Publication of EP0180515B2 publication Critical patent/EP0180515B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
    • F42B10/38—Range-increasing arrangements
    • F42B10/40—Range-increasing arrangements with combustion of a slow-burning charge, e.g. fumers, base-bleed projectiles

Definitions

  • the present invention relates to an ammunition system comprising an artillery projectile having an aerodynamic base drag, and a device having the aim of reducing this base drag, so as to increase, in notable proportions, the range and the precision of the ammunition which is provided with it.
  • the aforementioned device is contained, ready for use, provided with all the systems and means necessary for its operation, in a specific package independent of the ammunition that it is intended to equip. It can be mounted, or not, just before firing, depending on the distance from the target to be reached, which allows to solve in a simple way the problem of the preferential range of a munition.
  • the device according to the invention is a real "kit” capable of being adapted at any time to any ammunition fitted out in a very simple manner, to receive it.
  • the propellant charge is placed in a chamber of the projectile.
  • the propellant chamber causes, by its combustion, an additional acceleration of the projectile on its trajectory.
  • a drawback of this device lies in the fact that the acceleration at the start of the trajectory significantly reduces the accuracy of the shot. Added to this is a significant increase in the mass of the projectile so that the gain in range is not related to the additional energy consumption.
  • the length of the projectiles cannot be considerably increased, for reasons of space and ballistics, it is inevitable that the incorporation of the propellant charge takes place at the expense of the useful volume of the projectile.
  • the other device consists of a gas generator, located in a chamber at the base of the projectile.
  • This gas generator is ignited by a suitable igniter from the start of the flight of the projectile.
  • the gases generated by the combustion of this gas generator escape through a practical orifice in the combustion chamber at the base of the projectile.
  • the ejection of hot combustion gases does not cause any active acceleration of the projectile and is limited only to filling the volume in depression, of aerodynamic origin, which forms at the rear of the projectile and which creates the drag of base which decreases notably the range of the projectile.
  • This pellet trail being thus neutralized, the range of the projectile is considerably increased.
  • This device has the advantage of achieving much more economically than additional propulsion, an increase in range of the same order of magnitude (up to 30%).
  • the accuracy of the shot is significantly improved compared to the use of additional propulsion.
  • This projectile can be fired with or without this skirt.
  • This skirt does not contain any pyrotechnic composition so that it has only a very small impact on the range of the projectile. Furthermore, in the absence of pyrotechnic composition, this skirt does not pose any sealing problem, in particular when it is stored separately from the projectile.
  • the object of the invention is to remedy the drawbacks of the above-mentioned embodiment, by creating an ammunition system comprising an artillery projectile and a device for reducing the drag of the ammunition and which can be easily adapted to an existing projectile, so as to significantly increase the range thereof, this projectile can also be fired without this device to execute shots of shorter range.
  • the ammunition system comprising an artillery projectile having at its rear end a thread onto which a base ring is screwed
  • the projectile is a conventional projectile which can be fired without said base ring
  • the system further comprises a device for reducing the drag of the projectile comprising a pyrotechnic composition such as a propellant whose combustion generates gases under sufficient pressure to fill the depression created at the rear of the projectile, this device comprising a box containing the pyrotechnic composition and a igniter to allow firing of this composition, this casing comprising on its face intended to be applied against the rear of the projectile a sealed cover in that said device is contained in a separate package from the projectile, and in that the end of the device comprising the watertight cover comprises a thread such that this device can be screwed onto the thread provided at the rear end of the projectile, at any time in particular on the shooting range, after simple manual unscrewing of the base ring.
  • the housing of the device is closed in a sealed manner, allows its storage in a separate package from the projectile, so that the device can be adapted in a sealed manner to the rear of a conventional ammunition, at any time, in particular on the very ground of the shooting.
  • the device according to the invention which is adaptable to existing projectiles by means of a slight modification of the rear of these, therefore makes it possible to increase their range, while allowing the firing of these projectiles independently of the device when this increase in range is not necessary.
  • the fact of being able to fire the projectile without the device according to the invention makes it possible to achieve significant savings.
  • the invention therefore makes it possible to adjust the range of the shot, by acting not only on the number of charges and the increase, but also by adding in some cases, the device according to the invention.
  • the cover fixed tightly on the housing, protects the interior of the housing against mechanical shock and atmospheric agents.
  • this cover since it fits tightly against the rear of the projectile, this cover does not risk being deformed when fired under the effect of differential pressures generated on either side of this cover and which would inevitably lead to destruction of the device.
  • the igniter is fixed on the internal face of this cover.
  • this cover thus has a flat surface without projection, which can perfectly match the rear base of the projectile.
  • the device for reducing the drag of an ammunition such as a shell 1 of 155 mm caliber is constituted by a box 2 containing a pyrotechnic composition such as a propellant block 3 having a axial channel 4, and an igniter 6 to allow the ignition of this composition.
  • This box 2 is closed in a sealed manner and comprises fixing means cooperating with complementary fixing means provided at the rear of the ammunition to allow this housing 2 to be sealed, at any time, in particular on the ground, at the rear of the ammunition, so as to reduce its drag and increase its range.
  • the box 2 has on its face intended to be applied against the rear of the munition 1, an orifice 8 for discharging the gases generated during the combustion of the propellant block 3.
  • This evacuation orifice 8 is closed in leaktight manner by a plug 9 which can be destroyed under the effect of the pressure generated in the barrel of the munition launching weapon 1.
  • the seal between the plug 9 and the rear orifice 8 of the housing 2 is produced by means of an O-ring 9a.
  • FIGS. 2 and 4 Furthermore, it can be seen in FIGS. 2 and 4 that the faces of the propellant block 3 adjacent to the covers 5, 5a, to the side and rear walls of the housing 2 are covered by a layer of combustion inhibitor 3a.
  • the igniter 6 has on its wall adjacent to the axial channel 4 of the propellant block 3 holes 6a to allow the ignition of the pyrotechnic composition contained in the igniter 6 by the combustion gases formed by the propellant powder ammunition when fired.
  • the cover 5, 5a of the housing 2 has a surface complementary to that of the base 1a, 1b of the ammunition, so that this cover 2 follows this base when the housing 2 is fixed to the ammunition, as indicated in FIGS. 1 and 3 .
  • FIGS. 1 and 3 it can also be seen that the external surface of the casing 2, the means for fixing this casing 2 and the complementary securing means for the munition 1, are such as when the casing 2 is fixed to the munition , the exterior surface of this casing continuously follows the exterior surface of the munition.
  • the device according to the invention is suitable for a shell 1 having at its rear a hollow base, defined by a flat face bordered by a cylindrical skirt 1c.
  • the cover 5 of the housing 2 has a shape complementary to the interior surface of the hollow shell of the shell so that we can fit into this base. This cover 5 is welded tightly to the edge of the housing.
  • the housing 2 has, on its periphery, a thread 10 which can be screwed into a thread 11 formed on the internal lateral face of the skirt 1c which forms the hollow base.
  • the housing 2 has on its external face and near the thread 10, an annular shoulder 12 intended to come into abutment against the edge of the outer skirt 1c defining the hollow base of shell 1.
  • the device shown in Figure 4 is adaptable to a shell with a solid base (see Figure 3).
  • the cover 5a of the housing 2 has for this purpose an annular skirt 5b oriented towards the outside of the housing, this skirt 5b having on its internal face a thread 13 which can be screwed onto a thread 14 formed on the periphery of the shell of the shell , as shown in FIG. 3.
  • This skirt 5b itself has a thread 13a screwed onto a thread 14a of the housing 2.
  • the ammunition shown in Figures 1 and 3 therefore includes a rear part comprising fixing means which allow the fixing, at any time, without any preparation or modification, of the housing 2 of the device according to the invention.
  • the shell 1 shown in Figure 5 is identical to that of Figure 1.
  • the skirt 1c carries instead of the device according to the invention a base ring 15 having the same length as that of the housing 2.
  • This ring 15 can be placement at the rear of the shell 1, when the device according to the invention is not used.
  • the shell shown in FIG. 3 has a narrowed rear part 16 and a solid base to which the device according to the invention is fixed, this narrowed rear part 16 forms a hollow discontinuity between the shell and the housing 2. This discontinuity in hollow can be filled by a ring 17 placed on the shell before fixing the device.
  • the shell as in the embodiment according to Figure 3 has a narrowed rear portion 16 and a solid base, shaped to receive the device.
  • a ring 18 whose external profile is shaped to give the rear part of the shell its profile origin.
  • the invention makes it possible to increase considerably the range of conventional projectiles, without the device according to the invention significantly increasing the total weight of the projectile. Moreover, since the device according to the invention is stored in a separate package from the projectile, this device does not affect the conditions of transport and handling of the projectiles.
  • the ammunition retains its possibility of being fired without the device according to the invention. If, on the battlefield, it is desired to reach an objective situated beyond the normal maximum range of the projectile, it suffices to remove the base rings 15 or 18 and install the device according to the invention. This operation is very easy to carry out by personnel having no particular skills. In addition, this operation practically does not affect the time necessary to put the ammunition in order for the shooting.
  • the munition itself and the device according to the invention are stored separately, the explosive powder of the ammunition and the propellant are separated from the device, which makes it possible to separate the risks and thus facilitate inventory management. .
  • each munition it is possible to provide for each munition, a whole range of devices having casings 2 of different lengths containing different pyrotechnic charges, so as to be able to modify the range of the munition.
  • the invention does not apply only to shells but to all munitions which have a base drag and whatever their caliber.
  • the means of fixing the device according to the invention to the rear of the ammunition can be different from those described and be constituted for example by a bayonet fixing system or the like, the main thing being that these means allow a waterproof fixing and strong enough to withstand the pressure generated during shooting.
  • part of the pyrotechnic composition contained in the housing 2 can be replaced by a tracer powder so as to be able to follow the trajectory of the projectile.

Landscapes

  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Air Bags (AREA)
  • Soil Working Implements (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Particle Accelerators (AREA)
  • Body Structure For Vehicles (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Plasma Technology (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Details Of Aerials (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Road Signs Or Road Markings (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Electrically Operated Instructional Devices (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Valve Device For Special Equipments (AREA)
  • Ink Jet (AREA)
  • Executing Machine-Instructions (AREA)
  • Peptides Or Proteins (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Elimination Of Static Electricity (AREA)
  • Braking Arrangements (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Thermistors And Varistors (AREA)
  • Vending Machines For Individual Products (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
EP85402061A 1984-10-25 1985-10-23 Dispositif pour réduire la trainée des munitions et munitions aptes à le recevoir Expired - Lifetime EP0180515B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85402061T ATE37603T1 (de) 1984-10-25 1985-10-23 Einrichtung zum reduzieren des luftwiderstandes von munition und damit versehene munition.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8416348 1984-10-25
FR8416348A FR2572512B1 (fr) 1984-10-25 1984-10-25 Dispositif, adaptable sur engins ou munitions, tels que projectiles d'artillerie, destine a reduire leur trainee de culot

Publications (3)

Publication Number Publication Date
EP0180515A1 EP0180515A1 (fr) 1986-05-07
EP0180515B1 EP0180515B1 (fr) 1988-09-28
EP0180515B2 true EP0180515B2 (fr) 1992-04-29

Family

ID=9308998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85402061A Expired - Lifetime EP0180515B2 (fr) 1984-10-25 1985-10-23 Dispositif pour réduire la trainée des munitions et munitions aptes à le recevoir

Country Status (15)

Country Link
US (1) US4807535A (enrdf_load_stackoverflow)
EP (1) EP0180515B2 (enrdf_load_stackoverflow)
JP (1) JPS61147100A (enrdf_load_stackoverflow)
AT (1) ATE37603T1 (enrdf_load_stackoverflow)
BR (1) BR8505357A (enrdf_load_stackoverflow)
CA (1) CA1277538C (enrdf_load_stackoverflow)
DE (1) DE3565313D1 (enrdf_load_stackoverflow)
ES (2) ES297156Y (enrdf_load_stackoverflow)
FI (1) FI84858B (enrdf_load_stackoverflow)
FR (1) FR2572512B1 (enrdf_load_stackoverflow)
GR (1) GR852584B (enrdf_load_stackoverflow)
IL (1) IL76780A (enrdf_load_stackoverflow)
NO (1) NO157395C (enrdf_load_stackoverflow)
PT (1) PT81357B (enrdf_load_stackoverflow)
YU (1) YU45004B (enrdf_load_stackoverflow)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE461477B (sv) * 1987-02-10 1990-02-19 Bofors Ab Anordning vid ett basfloedesaggregat
DE3819640A1 (de) * 1988-06-09 1989-12-14 Rheinmetall Gmbh Geschoss mit treibladungssatz
US5056436A (en) * 1988-10-03 1991-10-15 Loral Aerospace Corp. Solid pyrotechnic compositions for projectile base-bleed systems
GB9216295D0 (en) * 1992-07-31 1998-05-06 Secr Defence Long range artillery range
FR2705144B1 (fr) * 1993-05-12 1995-12-29 Giat Ind Sa Projectile comprenant un corps ferme par un fond.
US5353711A (en) * 1993-10-04 1994-10-11 The United States Of America As Represented By The Secretary Of The Army Extended range artillery projectile
IL119392A (en) 1996-10-09 2004-01-04 Rafael Armament Dev Authority Device for reducing the drag at the base of a body
SE508403C2 (sv) * 1996-12-15 1998-10-05 Gunners Nils Erik Basflödesaggregat
FR2776372B1 (fr) 1998-03-19 2000-08-04 Giat Ind Sa Obus perforant anti structures betonnees et dispositif de conversion permettant d'obtenir un tel obus perforant a partir d'un obus explosif
US7802520B2 (en) * 2007-07-25 2010-09-28 Martin Electronics Drag minimizing projectile delivery system
KR101677945B1 (ko) 2008-03-13 2016-11-29 웰스태트 테러퓨틱스 코포레이션 화합물 및 요산을 감소시키기 위한 방법
US7891298B2 (en) * 2008-05-14 2011-02-22 Pratt & Whitney Rocketdyne, Inc. Guided projectile
US7823510B1 (en) 2008-05-14 2010-11-02 Pratt & Whitney Rocketdyne, Inc. Extended range projectile
DE102011018475A1 (de) 2011-04-21 2012-10-25 Rwm Schweiz Ag Vorrichtung und Verfahren zur luftdichten Abdeckung einer Leuchtspur oder dergleichen
JP5711720B2 (ja) 2012-11-13 2015-05-07 株式会社 資生堂 油中水型乳化日焼け止め化粧料
US8893621B1 (en) * 2013-12-07 2014-11-25 Rolando Escobar Projectile
DE102018115072A1 (de) * 2018-06-22 2019-12-24 Rheinmetall Waffe Munition Gmbh De- und aktivierbarer Base-Bleed
US11965721B2 (en) * 2022-09-13 2024-04-23 General Dynamics Ordnance and Tactical Systems—Canada, Inc. Closure disk assembly for tracer projectile
SE2400008A1 (sv) * 2024-01-16 2025-06-24 Bae Systems Bofors Ab Basflödesventil för hybridmotor

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US835714A (en) * 1904-09-03 1906-11-13 John Bonner Semple Projectile.
FR510303A (fr) * 1920-02-19 1920-12-02 Eugene Alexandre Huguenard Amélioration des propriétés balistiques des projectiles
FR560660A (fr) * 1923-01-04 1923-10-09 Procédé pour réduire la résistance opposée par l'air au déplacement des mobiles
US3485460A (en) * 1968-02-19 1969-12-23 Avco Corp Variable drag ogive
CH511416A (de) * 1969-08-05 1971-08-15 Oerlikon Buehrle Ag Leuchtgeschoss
FR2222631B1 (enrdf_load_stackoverflow) * 1973-03-19 1977-12-23 Space Res Corp
US4015534A (en) * 1974-12-16 1977-04-05 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Explosive projectile with projectile body
FR2328938A1 (fr) * 1975-10-22 1977-05-20 Gunners Nils Eric Projectile lance par canon et pourvu d'un systeme reduisant la trainance de base
SE427306B (sv) * 1976-09-22 1983-03-21 Arnold Ingemar Magnusson Projektil med anordning for basflode
US4213393A (en) * 1977-07-15 1980-07-22 Gunners Nils Erik Gun projectile arranged with a base drag reducing system

Also Published As

Publication number Publication date
EP0180515A1 (fr) 1986-05-07
EP0180515B1 (fr) 1988-09-28
ATE37603T1 (de) 1988-10-15
PT81357A (fr) 1985-11-01
DE3565313D1 (en) 1988-11-03
JPH0411799B2 (enrdf_load_stackoverflow) 1992-03-02
BR8505357A (pt) 1989-05-30
NO854096L (no) 1986-04-28
GR852584B (enrdf_load_stackoverflow) 1986-02-26
US4807535A (en) 1989-02-28
NO157395B (no) 1987-11-30
CA1277538C (fr) 1990-12-11
YU45004B (en) 1991-06-30
FI84858B (fi) 1991-10-15
FR2572512B1 (fr) 1987-09-25
FR2572512A1 (fr) 1986-05-02
FI854155A0 (fi) 1985-10-23
ES548171A0 (es) 1987-09-01
PT81357B (pt) 1987-09-18
YU168985A (en) 1988-12-31
ES297156Y (es) 1993-05-16
IL76780A (en) 1993-02-21
NO157395C (no) 1988-03-09
JPS61147100A (ja) 1986-07-04
ES8708053A1 (es) 1987-09-01
ES297156U (es) 1990-08-16
FI854155A7 (fi) 1986-04-26

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