EP1586852A1 - Munition sans douille et procede de montage d'une telle munition - Google Patents
Munition sans douille et procede de montage d'une telle munition Download PDFInfo
- Publication number
- EP1586852A1 EP1586852A1 EP05290557A EP05290557A EP1586852A1 EP 1586852 A1 EP1586852 A1 EP 1586852A1 EP 05290557 A EP05290557 A EP 05290557A EP 05290557 A EP05290557 A EP 05290557A EP 1586852 A1 EP1586852 A1 EP 1586852A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- block
- bowl
- ammunition
- projectile
- blocks
- 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- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
- F42B5/18—Caseless ammunition; Cartridges having combustible cases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
- F42B5/16—Cartridges, i.e. cases with charge and missile characterised by composition or physical dimensions or form of propellant charge, with or without projectile, or powder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
- F42B5/18—Caseless ammunition; Cartridges having combustible cases
- F42B5/181—Caseless ammunition; Cartridges having combustible cases consisting of a combustible casing wall and a metal base; Connectors therefor
Definitions
- the technical field of the invention is that of ammunition and more particularly ammunition wholesale caliber (greater than or equal to 50mm).
- These ammunition are intended to be fired from a armored combat vehicle.
- Fireproofness is ensured by means of a base metallic called shutter pellet.
- This pellet carries a tube igniter and it is the only part of the ammunition that is ejected from the room after firing to be stored in a base bag arranged in the turret.
- Patent FR 2622687 describes by way of example such known ammunition.
- the known fuel cases are manufactured according to paper techniques. They are expensive to obtain and have a Thickness greater than a millimeter that reduces the volume available for the propellant charge.
- the ammunition according to the invention makes it possible to increase, with a reduced cost, the volume of the propellant load without reduce the mechanical strength of the munition.
- the subject of the invention is therefore an ammunition comprising a projectile, a propelling charge and a device ignition of the latter which is integral with a base
- the ammunition according to the invention makes it possible to increase, with a reduced cost, the volume of the propellant load without reduce the mechanical strength of the munition.
- the subject of the invention is therefore an ammunition comprising a projectile, a propelling charge and a device ignition of the latter which is integral with a base sealing, ammunition characterized in that the loading propellant comprises at least one agglomerated charge block which is covered with a protective sheath, the ammunition comprising a connecting piece secured to the projectile and surrounding at least a portion of an agglomerated charge block, fastening means being provided for binding the piece of binding and / or the pellet with at least one propellant block.
- the connecting piece may comprise a first means latching cooperating with a complementary profile of a front part of a block to ensure the solidarity of the projectile and loading, the first means of attachment the connecting piece then being constituted by nozzles regularly distributed angularly, the complementary profile of the front part of the block being formed by a throat.
- the ammunition can have a bowl on the back of a block of agglomerated filler, bowl made integral with the block by a second hooking means cooperating with a profile complementary to the rear part of the block, bowl bound by elsewhere on the base by a fixing means.
- the second attachment means of the bowl may be constituted by tongues springs regularly distributed angularly, tongues cooperating with a groove of the back part of the block.
- the means for fixing the base to the bowl may include at least one spring washer surrounding a axial extension of the base.
- the munition may include at least one axial wedge compressible interposed between an agglomerated charge block and the bowl and / or the projectile.
- the protective sheath will advantageously cover the bottom grooves for fastening the connecting piece and / or bowl.
- the protective sheath will preferably be a sheath made of a composite material combining at least one reinforcement and a binder.
- At least one agglomerated block of charge may comprise on one of its faces a hollow cooperating with a surface bulging of a neighboring block to limit movement crosswise from one block to the other.
- Each block may also include a surface flat annular, surrounding a hollow or a surface curved, complementary to a hollow of a neighboring block, the flat annular surfaces of two adjacent blocks being separated by a game.
- each block may comprise on its outer surface of the longitudinal notches.
- the propelling charge may include a rear block having an internal dwelling inside which will be arranged a propellant charge.
- a preform will first be made of the protective sheath on tooling having the shape external propulsive loading then we will make this preform solidary of stacking blocks.
- a munition 1 according to a particular embodiment of the invention comprises a projectile 2 (of which only the rear part is visible), a propellant charge 3 and an ignition device 4 of this propulsive loading.
- the projectile could of course be a projectile under calibrated (having a bar integral with a shoe) or well an explosive projectile with caliber.
- the structure of projectile itself is not the subject of this invention and therefore it is not necessary to describe it more in detail.
- the ignition device 4 is secured to a base 5 which in a known manner has a body solid metal bearing a sealing lip in rubber 6. Such a cap is described by the patent US4159678.
- the propellant charge 3 of the ammunition comprises at least one agglomerated charge block 7, here three blocks 7a, 7b and 7c stacked.
- the blocks 7a, 7b and 7c of agglomerated charge are conventionally constituted by a propellant powder formed of grains agglomerated by a binder. Such blocks are described for example by the patents US3092525, US5516378 and FR2776656.
- Each block 7 has an internal bore 12a, 12b, 12c for facilitating the lighting of the blocks from the ignition device 4.
- the front block 7a also has an external profile before conical 8 which is housed inside a room of plastic link 9 fixed in a groove device 10 of the projectile 2 (such a connecting piece is described in the patent FR2801667).
- the front block 7a also has a cylindrical surface 11 on which is positioned a cylindrical surface 9a of the connecting piece 9.
- a wedge 29 of compressible material (by example in expanded polystyrene) is interposed between the face upper block 7a and the projectile 2.
- the rear block 7c has a curved rear profile which is lodged in the base 5.
- the rear block 7c also has a cavity 13 allowing the development of the flame generated by the ignition device 4.
- This cavity 13 may contain a charge of granular propellant powder (not shown) which will facilitate the ignition of the rear block 7c.
- blocks 7b and 7c each have a hollow 14 cooperating with a surface complementary bulge carried by the neighboring block (see also Figure 4).
- each block 7 comprises at least a planar annular surface 15a or 15b which is arranged around the hollow 14 or the complementary convex surface of the hollow.
- the annular surfaces 15a and 15b of two blocks consecutive games are separated by a game 16 of the order of millimeter.
- the blocks 7 are in contact only at the level of the hollow 14.
- blocks 7a, 7b and 7c have their outer cylindrical surface surrounded by a sheath of protection 17.
- This protective sheath 17 covers also partially the convex rear part of the block 7c and it is thus interposed between the base 5 and the rear block 7c.
- the sheath 17 will be made of a composite material combining a reinforcement (such as glass fibers, carbon, cotton or linen) and a binder such as a resin epoxy or phenolic.
- a reinforcement such as glass fibers, carbon, cotton or linen
- a binder such as a resin epoxy or phenolic.
- this sheath is preformed on an appropriate tool before being applied around the blocks.
- the sheath 17 serves to ensure the protection of Agglomerated charge blocks 7 against moisture and shocks.
- This sheath does not fulfill the same function as that a fuel bushing according to the prior art. She does not itself ensure the mechanical maintenance of the propellant loading compared to the projectile but only the cohesion of the stack of blocks.
- the thickness of the sheath is of the order of 0.3 mm which is less than the thickness of a conventional fuel holster (about 3 mm). This results in an increase in the mass of propulsive loading of almost 10% compared to a agglomerated loading incorporated into a combustible case classic (11 kg instead of 10 kg for a 120mm caliber) and 30% compared to a grain propellant charge (8.3 kg).
- This connecting piece thus comprises a first means fastening constituted by spouts 18 regularly distributed angularly. These beaks are secured to a crown thin cylindrical 9b of the connecting piece 9. They cooperate with a complementary profile carried out at the level of the party before block 7a, complementary profile which is constituted here 19.
- the spouts 18 have a front portion 18a conical which cooperates during assembly with the conical profile before 8 of the block 7a so as to widen by deformation resilient crown 9b, thus allowing the mounting of the connecting piece 9 carrying the projectile 2 on the front block 7a.
- the spouts enter the groove 19 and they thus ensure the joining of the connecting piece 9 and the front block 7a.
- the rear face 18b of the nozzles being then facing a flat stop surface of the groove.
- the sheath 17 covers the bottom of the throat 19 and is therefore compressed by the nozzles 18 during assembly. We provide thus the sealing of the blocks with respect to external moisture.
- Figure 3 shows how the link is achieved mechanical between the base 5 and the rear propulsion unit 7c.
- the ammunition comprises a bowl 20 made of a plastic material, bowl capping a rear portion 21 of the agglomerated charge block back 7c.
- This bowl 20 is secured to the block 7c by a second means of attachment which consists of spring tabs 22 regularly distributed angularly. Here only one tab is visible. These tabs are made of sheet steel with spring and are attached to the bowl 20 by rivets 23.
- the tongues 22 cooperate with a groove 24 arranged in the rear part of the propulsion unit 7c.
- the tabs are oriented so that it is possible to slide the bowl 20 on the back of the block propulsion 7c, the tabs fold back by sliding on the back part 21. They resume their unfolded position the inside of the throat 24. They are then in contact with a stop plane 24a of the throat which prohibits the extraction of the bowl 20.
- the sheath 17 covers the bottom of the throat 24.
- the bowl 20 is also linked to the base 5 by a fastening means which comprises a holding washer 25 surrounding an axial extension 26 of the base 5.
- the washer will be for example an elastic washer split (more commonly known as Circlips).
- a washer 27 is interposed between the bowl 20 and block 7c.
- This washer 27 provides an axial wedging compressible which also ensures the contact of ends of the tongues 22 with the abutment plane 24a. She will be made for example of expanded polystyrene or elastomer and it will be glued to the bowl 20.
- connection between the base 5 and the load block 7c has some angular flexibility which is ensured by the tabs 22.
- a preform is produced by pre-stratification of the sheath 17 on a tool having the shape of the load definitive propulsion system and in particular to train the subsequent profile of the sheath at the grooves 19 and 24.
- This preform will be opened longitudinally to facilitate its subsequent installation on the loading blocks.
- the preform is then placed around the blocks previously impregnated on the surface with an epoxy resin or Phenolic.
- the internal pressure will be of the order of 0.5 atmosphere.
- This depression allows to marry the profile external propulsion blocks by the profile of the sheath 17 during the polymerization of the resin providing the bond mechanical.
- This process increases the mechanical strength propulsive loading and especially rigidity at the level notch grooves 19 and 24.
- the connecting piece 9 is fixed at the level of the groove 10 of the projectile 2 and a bowl 20 is fixed to a shutter base 5.
- the loading is made integral with the shutter 5 and its bowl 20 by engaging the bowl on the rear part 21 of the block 7c to the input of the spring tabs 22 in the back throat 24.
- the invention makes it possible to produce an ammunition having an increased propulsive loading mass without the mechanical strength is diminished. Moreover the cost of the connecting sheath 17 is very small and much less than that of a combustible case.
- the sheath is destroyed during firing and ejected with the gases propulsion.
- FIG. 5 shows in section an ammunition according to a variant embodiment of the invention.
- This ammunition differs from the previous one in that each block 7 has on its external cylindrical surface of the longitudinal notches 28. These notches have a reduced depth (of the order of millimeter). They are regularly distributed angularly and extend longitudinally the entire length of a block.
- the sheath 17 surrounds the block and she applies on this one also inside the notches 28.
- the blocks 7 are oriented during assembly so that that the notches 28 are arranged in the extension the each other.
- the notches can of course be in number and / or different distribution, as well as having shapes and / or different dimensions.
- Cords may be formed by cords ITLX pyrotechnics of the type described in the applications US4917017 or US5179250.
- cords can also be simply constituted by inert diffuser tubes made of flexible plastic to drive the flame produced by the ignition charge.
- diffuser tubes are described by the patent application FR01 / 09053.
- the ignition transmission lines will be introduced, before fixing the base, in holes made in the different propellant blocks 7. These holes will be well sure oriented angularly to each other when mounting the load to ensure alignment of holes.
- the ignition device may also include a plasma igniter of the type described by the patents FR2807610 or FR2807611.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
Description
- on entoure un bloc de charge propulsive agglomérée ou un empilement de blocs avec une gaine de protection,
- on rend solidaire la gaine de protection avec le ou les blocs,
- on fixe une pièce de liaison au niveau d'une partie arrière d'un projectile,
- on fixe une cuvette à un culot obturateur,
- on rend solidaire le projectile et sa pièce de liaison d'avec le chargement en engageant la pièce de liaison sur une partie avant du ou des blocs,
- on rend solidaire le culot obturateur et sa cuvette d'avec le chargement en engageant la cuvette sur une partie arrière du ou des blocs.
- la figure 1 est une vue en coupe longitudinale d'une munition selon un mode de réalisation de l'invention,
- les figures 2 et 3 sont des vues agrandies des moyens de liaison d'un bloc propulsif avec la pièce de liaison avant et la cuvette arrière respectivement,
- la figure 4 est une vue de détail de la jonction entre deux blocs propulsifs,
- la figure 5 est une vue en coupe transversale d'une variante de réalisation de l'invention.
Claims (14)
- Munition (1) comprenant un projectile (2), un chargement propulsif (3) et un dispositif d'allumage (4) de ce dernier qui est solidaire d'un culot d'étanchéité (5), munition caractérisée en ce que le chargement propulsif (3) comprend au moins un bloc (7a,7b,7c) de charge agglomérée qui est recouvert d'une gaine de protection (17), la munition comprenant une pièce de liaison (9) solidaire du projectile (2) et entourant au moins une partie d'un bloc (7a) de charge agglomérée, des moyens d'accrochage (18,22) étant prévus pour lier la pièce de liaison (9) et/ou le culot (5) avec au moins un bloc propulsif (7a,7c).
- Munition selon la revendication 1, caractérisée en ce que la pièce de liaison comprend un premier moyen d'accrochage (18) coopérant avec un profil complémentaire (19) d'une partie avant d'un bloc (7a) pour assurer la solidarisation du projectile (2) et du chargement (3), le premier moyen d'accrochage de la pièce de liaison étant constitué par des becs (18) régulièrement répartis angulairement, le profil complémentaire de la partie avant du bloc étant formé par une gorge (19).
- Munition selon une des revendications 1 ou 2, caractérisée en ce qu'elle comporte une cuvette (20) coiffant une partie arrière (21) d'un bloc (7c) de charge agglomérée, cuvette rendue solidaire du bloc par un deuxième moyen d'accrochage (22) coopérant avec un profil complémentaire (24) de la partie arrière du bloc (7c), cuvette liée par ailleurs au culot (5) par un moyen de fixation (25).
- Munition selon la revendication 3, caractérisée en ce que le deuxième moyen d'accrochage de la cuvette est constitué par des languettes ressorts (22) régulièrement réparties angulairement, languettes coopérant avec une gorge (24) de la partie arrière du bloc (7c).
- Munition selon une des revendications 3 ou 4, caractérisée en ce que le moyen de fixation du culot à la cuvette comprend au moins une rondelle ressort (25) entourant un prolongement axial (26) du culot (5).
- Munition selon une des revendications 3 à 5, caractérisée en ce qu'elle comporte au moins un calage axial (27,29) compressible interposé entre un bloc de charge agglomérée et la cuvette (20) et/ou le projectile (2).
- Munition selon une des revendications 1 à 6, caractérisée en ce que la gaine de protection (17) recouvre le fond des gorges (19,24) permettant l'accrochage de la pièce de liaison (9) et/ou de la cuvette (20).
- Munition selon une des revendications 1 à 7, caractérisée en ce que la gaine de protection (17) est une gaine réalisée en un matériau composite associant au moins un renfort et un liant.
- Munition selon une des revendications 1 à 8, caractérisée en ce qu'au moins un bloc (7) de charge agglomérée comporte sur une de ses faces un creux (14) coopérant avec une surface bombée d'un bloc voisin pour limiter les déplacements transversaux d'un bloc par rapport à l'autre.
- Munition selon la revendication 9, caractérisée en ce que chaque bloc comporte une surface annulaire plane (15a,15b), entourant un creux (14) ou bien une surface bombée complémentaire d'un creux d'un bloc voisin, les surfaces annulaires planes de deux blocs adjacents étant séparées par un jeu (16).
- Munition selon une des revendications 1 à 10, caractérisée en ce que chaque bloc (7) comporte sur sa surface externe des encoches longitudinales (28).
- Munition selon une des revendications 1 à 11, caractérisée en ce que le chargement propulsif comporte un bloc arrière (7c) présentant un logement interne (13) à l'intérieur duquel est disposée une charge propulsive.
- Procédé de montage d'une munition selon une des revendications 1 à 12, caractérisé par la succession des étapes suivantes :on entoure un bloc (7) de charge propulsive agglomérée ou un empilement de blocs (7a,7b,7c) avec une gaine de protection (17),on rend solidaire la gaine de protection (17) avec le ou les blocs (7),on fixe une pièce de liaison (9) au niveau d'une partie arrière d'un projectile (2),on fixe une cuvette (20) à un culot obturateur (5),on rend solidaire le projectile (2) et sa pièce de liaison (9) d'avec le chargement en engageant la pièce de liaison (9) sur une partie avant du ou des blocs,on rend solidaire le culot obturateur (5) et sa cuvette (20) d'avec le chargement en engageant la cuvette sur une partie arrière du ou des blocs.
- Procédé de montage d'une munition selon la revendication 13, caractérisé en ce qu'on réalise tout d'abord une préforme de la gaine de protection (17) sur un outillage ayant la forme externe du chargement propulsif puis on rend cette préforme solidaire de l'empilement des blocs.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0404058 | 2004-04-15 | ||
FR0404058A FR2869101B1 (fr) | 2004-04-15 | 2004-04-15 | Munition sans douille et procede de montage d'une telle munition |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1586852A1 true EP1586852A1 (fr) | 2005-10-19 |
Family
ID=34942002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05290557A Withdrawn EP1586852A1 (fr) | 2004-04-15 | 2005-03-14 | Munition sans douille et procede de montage d'une telle munition |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1586852A1 (fr) |
FR (1) | FR2869101B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009115199A1 (fr) * | 2008-03-20 | 2009-09-24 | Rheinmetall Waffe Munition Gmbh | Procédé de fabrication d'une cartouche avec un projectile à cage motrice construit selon ce procédé |
EP2108916A1 (fr) * | 2008-04-09 | 2009-10-14 | Nexter Munitions | Munition de gros calibre chargée par l'arrière |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4928598A (en) * | 1986-06-13 | 1990-05-29 | Rheinmetall Gmbh | Propelling charge case |
US5129324A (en) * | 1989-10-19 | 1992-07-14 | Campoli Ralph F | Cartridge assembly |
FR2807611A1 (fr) | 2000-04-11 | 2001-10-12 | Giat Ind Sa | Torche plasma comportant des electrodes separees par un entrefer et allumeur incorporant une telle torche |
FR2807610A1 (fr) | 2000-04-11 | 2001-10-12 | Giat Ind Sa | Torche a plasma incorporant un fusible d'amorcage reactif et tube allumeur integrant une telle torche |
DE10055068A1 (de) * | 2000-11-07 | 2002-05-29 | Rheinmetall W & M Gmbh | Patrone |
US6450099B1 (en) * | 1999-10-13 | 2002-09-17 | Giat Industries | Device to fasten a sealing base onto an ammunition case and base adapted to this fastening device |
US6505560B1 (en) * | 2001-08-07 | 2003-01-14 | Alliant Techsystems Inc. | Spring disc for securing a combustible cartridge case to a case base |
WO2004015358A1 (fr) * | 2002-08-08 | 2004-02-19 | Bofors Defence Ab | Cartouche sans douille complete et son procede de production |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2622687B1 (fr) | 1987-10-29 | 1993-05-28 | France Etat Armement | Chargement propulsif pour munition comportant un projectile empenne ainsi que son procede de realisation |
-
2004
- 2004-04-15 FR FR0404058A patent/FR2869101B1/fr not_active Expired - Fee Related
-
2005
- 2005-03-14 EP EP05290557A patent/EP1586852A1/fr not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4928598A (en) * | 1986-06-13 | 1990-05-29 | Rheinmetall Gmbh | Propelling charge case |
US5129324A (en) * | 1989-10-19 | 1992-07-14 | Campoli Ralph F | Cartridge assembly |
US6450099B1 (en) * | 1999-10-13 | 2002-09-17 | Giat Industries | Device to fasten a sealing base onto an ammunition case and base adapted to this fastening device |
FR2807611A1 (fr) | 2000-04-11 | 2001-10-12 | Giat Ind Sa | Torche plasma comportant des electrodes separees par un entrefer et allumeur incorporant une telle torche |
FR2807610A1 (fr) | 2000-04-11 | 2001-10-12 | Giat Ind Sa | Torche a plasma incorporant un fusible d'amorcage reactif et tube allumeur integrant une telle torche |
DE10055068A1 (de) * | 2000-11-07 | 2002-05-29 | Rheinmetall W & M Gmbh | Patrone |
US6505560B1 (en) * | 2001-08-07 | 2003-01-14 | Alliant Techsystems Inc. | Spring disc for securing a combustible cartridge case to a case base |
WO2004015358A1 (fr) * | 2002-08-08 | 2004-02-19 | Bofors Defence Ab | Cartouche sans douille complete et son procede de production |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009115199A1 (fr) * | 2008-03-20 | 2009-09-24 | Rheinmetall Waffe Munition Gmbh | Procédé de fabrication d'une cartouche avec un projectile à cage motrice construit selon ce procédé |
US8522683B2 (en) * | 2008-03-20 | 2013-09-03 | Rheinmetall Waffe Munition Gmbh | Method for producing a shell and a shell with a sabot projectile produced by this method |
EP2108916A1 (fr) * | 2008-04-09 | 2009-10-14 | Nexter Munitions | Munition de gros calibre chargée par l'arrière |
FR2930026A1 (fr) * | 2008-04-09 | 2009-10-16 | Nexter Munitions Sa | Munition de gros calibre chargee par l'arriere |
US8015923B2 (en) | 2008-04-09 | 2011-09-13 | Nexter Munitions | Large calibre ammunition loaded via rear |
Also Published As
Publication number | Publication date |
---|---|
FR2869101A1 (fr) | 2005-10-21 |
FR2869101B1 (fr) | 2006-06-02 |
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