US20100282054A1 - Arrangement for weapon - Google Patents
Arrangement for weapon Download PDFInfo
- Publication number
- US20100282054A1 US20100282054A1 US11/984,501 US98450107A US2010282054A1 US 20100282054 A1 US20100282054 A1 US 20100282054A1 US 98450107 A US98450107 A US 98450107A US 2010282054 A1 US2010282054 A1 US 2010282054A1
- Authority
- US
- United States
- Prior art keywords
- container
- openable
- countermass
- arrangement according
- annular element
- 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.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A1/00—Missile propulsion characterised by the use of explosive or combustible propellant charges
- F41A1/08—Recoilless guns, i.e. guns having propulsion means producing no recoil
- F41A1/10—Recoilless guns, i.e. guns having propulsion means producing no recoil a counter projectile being used to balance recoil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
- F41F3/00—Rocket or torpedo launchers
- F41F3/04—Rocket or torpedo launchers for rockets
- F41F3/045—Rocket or torpedo launchers for rockets adapted to be carried and used by a person, e.g. bazookas
- F41F3/0455—Bazookas
Definitions
- the present invention relates to an arrangement for a weapon comprising a countermass for reducing the pressure around the weapon, the countermass being enclosed in a container, which is mountable in the barrel of the weapon behind an ammunition part, such as a projectile or shell, and comprising an openable cover with break indications on the ammunition part side and an openable bottom with break indications on the other side.
- an ammunition part such as a projectile or shell
- the opening operation of the bottom depends on the temperature of the weapon or the countermass container.
- the operating temperature can vary between approximately ⁇ 40° C. and +63° C.
- One object of the present invention is to provide an arrangement for a weapon with a countermass container, which brings about an improved symmetrical opening operation with favourable recoil in a better way than before.
- the folding support is provided by means of an annular element configured to fit tightly against the outside of the countermass container and in agreement with the break indications of the openable bottom.
- the openable bottom is designed with a number of openable flaps and said annular element comprises a support member for each openable flap forming part of the bottom.
- annular element with a support member for each openable flap enables the opening area in the bottom of the counter mass container be defined by folding edges formed by each base of the opened flaps as in contact with the corresponding support members.
- each openable flap might be triangular and in the open state configured with free equilateral legs and a base region integral with the wall of the countermass container.
- FIG. 1 is a perspective view of a an arrangement for a weapon with countermass container in the form of a sleeve, in one end of which a guiding folding support is configured by means of an annular element,
- FIG. 2 is a perspective view according to FIG. 1 of a counter mass container with eight openable flaps mounted in the sleeve,
- FIG. 3 is an end view of FIG. 1 showing the circumferential extension of the support members of the annular element
- FIG. 4 is an end view of FIG. 2 showing that a support member is allocated for each openable flap forming part of the bottom of the container,
- FIG. 5 shows a variant of FIG. 4 of a counter mass container with four openable flaps mounted in the sleeve
- FIG. 6 shows a longitudinal section of a rear part of a weapon provided with a counter mass container arrangement sectioned through lines A 1 -A 1 ; A 2 -A 2 as illustrated in FIGS. 4 and 5 ,
- FIG. 7 is a detailed section view on a larger scale of a bottom part of the container arrangement in FIG. 6 , which illustrates one flap in its open state after firing the ammunition.
- FIG. 1 is a perspective view of an arrangement 2 for a weapon with countermass container comprising a sleeve 4 , in one end of which a guiding folding support 6 is configured by means of an annular element 8 .
- said sleeve 4 is configured as a lining or casing for the counter mass container, which is mountable in the sleeve 4 .
- FIG. 2 is a perspective view of the sleeve in FIG. 1 , in which a counter mass container 10 of a conventional kind is mounted.
- said container is configured with an openable bottom 12 by means of eight evenly distributed brake indications 14 .
- eight openable flaps 16 are defined in said openable bottom.
- FIGS. 3 and 4 are end views of FIGS. 1 and 2 respectively.
- FIG. 3 illustrates the circumferential extension of the annular element 8 and particularly it illustrates an assembly of eight separate support members 18 integrated in the annular element.
- One support member 18 is allocated for each openable flap 16 forming part of the bottom 12 of the container. Further, it is evident that each support member 18 is configured with a straight folding line 20 , which constitutes a chord of the annular element 8 and is located at a distance d 1 from the centre line c.
- FIG. 5 shows a variant of FIG. 4 having a counter mass container with four openable flaps mounted in the sleeve.
- said container is configured with an openable bottom by means of four evenly distributed brake indications 14 ′.
- four openable flaps 16 ′ are defined in said openable bottom.
- FIG. 5 illustrates the circumferential extension of the annular element 8 ′ and particularly it illustrates an assembly of four separate support members 18 ′ integrated in the annular element.
- One support member 18 ′ is allocated for each openable flap 16 ′ forming part of the bottom 12 ′ of the container.
- each support member 18 ′ is configured with a straight folding line 20 ′, which constitutes a chord of the annular element 8 ′ and is located at a distance d 2 from the centre line c.
- the configuration with four support members 18 ′ will result in a relatively small opening area a 2 in the bottom 12 ′ of the container.
- Similar advantages are achieved as in the embodiment with eight openable flaps as illustrated in FIG. 4 .
- the fact is that such a small number as four openable flaps 16 ′ even implies a greater risk, as each folding line 20 ′ is proportionately longer and thereby more sensitive to be broken in pieces than in the embodiment with eight flaps.
- FIG. 6 illustrates the rear part of a weapon comprising a barrel 24 accommodating an ammunition part with a projectile, shell or the like (not shown) and the countermass container arrangement 2 sectioned through lines A 1 -A 1 ; A 2 -A 2 .
- the annular element 8 is configured at one end (the rear end) of the sleeve 4 , which is arranged to interact between the counter mass container 10 and the barrel 24 .
- the counter mass container 10 is mounted in the sleeve 4 with each support member 18 of the annular element located close to the corresponding base region 22 of each flap 16 in the openable bottom 12 , which base region is integral with the wall of the countermass container 10 .
- FIG. 7 is a detailed section view on a larger scale of a representative bottom part of the container arrangement in FIG. 6 , which illustrates in dashed lines one flap 16 in its open state.
- the sleeve 4 including the appropriate support member 18 integrated in the annular element 8 has an outer diameter DS and is supported by the barrel 24 .
- the flap 16 has been bent open to its open state by influence of the counter mass. It appears that the flap 16 has been bent over the support member 18 and the material of the flap in a hinge part in abutment against the support member 18 has been deformed to such an extent that its free end 26 is located close to the barrel 24 , whereby a folding edge 28 is formed of said material in abutment against the support member.
- said folding edge 28 would be located a distance from the inside of the barrel 24 , approximately the same as the outer diameter Ds of the sleeve 4 , which determines the actual location of the folding line 20 , which in turn depends on the number of flaps chosen, compare distance d 1 in FIG. 4 with distance d 2 in FIG. 5 from the centre line c. Secondly, to d 1 ,d 2 or any optional such distance the thickness of the material in the flap should be added, which would result in a distance da from the centre line c.
- the actual distance da is the decisive design parameter for defining the opening area a 1 , a 2 of the container. Hence, by varying the number of flaps it is achievable to control the opening area of the container.
- the described embodiments are disclosed with eight or four openable flaps only as non delimiting examples. Variants having different numbers of flaps are allowed within the scope of the invention.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Cartons (AREA)
Abstract
An arrangement for a weapon including a countermass for reducing the pressure around the weapon. The countermass is enclosed in a container, which is mountable in the barrel of the weapon behind an ammunition part. The container is provided with an openable bottom with break indications. A guiding folding support, configured as an annular element, is arranged adjacent to the openable bottom on the outside of the bottom relative to the countermass container. The annular element is provided with a support member for each openable flap forming part of the bottom. Thereby, the opening area in the bottom of the counter mass container is defined by folding edges, formed in each base region of the flaps in the open state as in contact with its corresponding support member.
Description
- 1. Technical Field of the Invention
- The present invention relates to an arrangement for a weapon comprising a countermass for reducing the pressure around the weapon, the countermass being enclosed in a container, which is mountable in the barrel of the weapon behind an ammunition part, such as a projectile or shell, and comprising an openable cover with break indications on the ammunition part side and an openable bottom with break indications on the other side.
- 2. Description of Related Art
- In order to increase the backward momentum and thus make possible an increase in weight of the ammunition part without excessively high pressure being created behind the weapon, it has been known for many years to introduce what is known as a countermass. A critical stage in weapons with countermass is the opening phase of the countermass container. In this connection reference might be made to our SE patents 0301626-8 and 0301627-6, which discloses examples of countermass containers with symmetrical opening of its cover, where all break indications contribute simultaneously to the opening operation. Variations in temperature and pressure of the weapon or the countermass container might, if not compensated, influence on the opening operation.
- Likewise, it is important to obtain symmetrical opening of the bottom of the countermass container. In this regard it is vital that even all break indications of the bottom contribute simultaneously to the opening operation of the bottom. If any part of the bottom does not open at the same time as the other parts, an asymmetric flow is created when the countermass is leaving the countermass container, which can produce great shear forces on the barrel towards the outlet. For the good functioning of the weapon it is important that the countermass has a homogeneous form when it leaves the countermass container. Further, great recoil variations might occur within the temperature range. In case the bottom would fall apart into pieces, these would constitute a great risk behind the weapon.
- Even the opening operation of the bottom depends on the temperature of the weapon or the countermass container. The operating temperature can vary between approximately −40° C. and +63° C. In order for the opening operation of the bottom to have as small a variation spread as possible and to create optimum opportunities for small recoil spreads, it is important to compensate for pressure variations.
- One object of the present invention is to provide an arrangement for a weapon with a countermass container, which brings about an improved symmetrical opening operation with favourable recoil in a better way than before.
- This is possible with an arrangement of the initially defined kind comprising a guiding folding support which is arranged adjacent to said openable bottom on the outside of the bottom relative to the countermass container.
- Expedient improvements and developments of said arrangement appear from the appended claims and the following description.
- According to an advantageous development of the arrangement the folding support is provided by means of an annular element configured to fit tightly against the outside of the countermass container and in agreement with the break indications of the openable bottom. The openable bottom is designed with a number of openable flaps and said annular element comprises a support member for each openable flap forming part of the bottom.
- Introduction of the annular element with a support member for each openable flap enables the opening area in the bottom of the counter mass container be defined by folding edges formed by each base of the opened flaps as in contact with the corresponding support members.
- This in turn results in as small a variation spread as possible in the opening operation of the bottom and the best opportunity for small recoil spreads has thus been created.
- Further, it results in a reproducible, almost identical opening area, even if different weapons are utilized. Moreover, this makes it possible to restrict the generation of undesirable forces which might exert negative influence on the weapon, control the recoil progress and minimize the risk of an asymmetric pressurising of the countermass, each of which would affect the alignment of the weapon during the period when the shell is moving forward in the barrel. In addition, by varying the number of flaps and corresponding support members it is possible to control the opening are in the bottom of the container. Advantageously, each openable flap might be triangular and in the open state configured with free equilateral legs and a base region integral with the wall of the countermass container.
- The invention will be described in more detail below by means of illustrative embodiments with reference to the accompanying schematic drawings.
-
FIG. 1 is a perspective view of a an arrangement for a weapon with countermass container in the form of a sleeve, in one end of which a guiding folding support is configured by means of an annular element, -
FIG. 2 is a perspective view according toFIG. 1 of a counter mass container with eight openable flaps mounted in the sleeve, -
FIG. 3 is an end view ofFIG. 1 showing the circumferential extension of the support members of the annular element, -
FIG. 4 is an end view ofFIG. 2 showing that a support member is allocated for each openable flap forming part of the bottom of the container, -
FIG. 5 shows a variant ofFIG. 4 of a counter mass container with four openable flaps mounted in the sleeve, -
FIG. 6 shows a longitudinal section of a rear part of a weapon provided with a counter mass container arrangement sectioned through lines A1-A1; A2-A2 as illustrated inFIGS. 4 and 5 , -
FIG. 7 is a detailed section view on a larger scale of a bottom part of the container arrangement inFIG. 6 , which illustrates one flap in its open state after firing the ammunition. - The general principles of an arrangement for a weapon comprising a countermass container mentioned by way of introduction and particularly solutions to obtain symmetrical opening of the cover of the countermass container are described in our SE patents 0301626-8 and 0301627-6 and therefore not described in greater detail here. The subject matter of the present invention is related to the opening of the bottom section of the counter mass container.
-
FIG. 1 is a perspective view of anarrangement 2 for a weapon with countermass container comprising asleeve 4, in one end of which a guiding folding support 6 is configured by means of anannular element 8. In this embodiment saidsleeve 4 is configured as a lining or casing for the counter mass container, which is mountable in thesleeve 4. -
FIG. 2 is a perspective view of the sleeve inFIG. 1 , in which acounter mass container 10 of a conventional kind is mounted. In this embodiment said container is configured with anopenable bottom 12 by means of eight evenlydistributed brake indications 14. In this way eightopenable flaps 16 are defined in said openable bottom. -
FIGS. 3 and 4 are end views ofFIGS. 1 and 2 respectively.FIG. 3 illustrates the circumferential extension of theannular element 8 and particularly it illustrates an assembly of eightseparate support members 18 integrated in the annular element. Onesupport member 18 is allocated for eachopenable flap 16 forming part of thebottom 12 of the container. Further, it is evident that eachsupport member 18 is configured with astraight folding line 20, which constitutes a chord of theannular element 8 and is located at a distance d1 from the centre line c. On the contrary to an arced folding line, which conventionally would appear in the bottom of a container in lack of the guiding folding support 6, saidstraight folding line 20 will prevent the appearance of tear-off edges in abase region 22 of eachflap 16 integral with the wall of thecountermass container 10. This is essential as the absence of tear-off edges will secure that no debris from parts of flaps will adhere to the counter mass when flowing out through the outlet of the barrel. The configuration with eightsupport members 18 will result in a relatively large opening area a1 in thebottom 12 of the container. The larger the number of support members the larger is the area of the opening in the bottom. -
FIG. 5 shows a variant ofFIG. 4 having a counter mass container with four openable flaps mounted in the sleeve. In this embodiment said container is configured with an openable bottom by means of four evenlydistributed brake indications 14′. In this way fouropenable flaps 16′ are defined in said openable bottom.FIG. 5 illustrates the circumferential extension of theannular element 8′ and particularly it illustrates an assembly of fourseparate support members 18′ integrated in the annular element. - One
support member 18′ is allocated for eachopenable flap 16′ forming part of thebottom 12′ of the container. - Even in this embodiment each
support member 18′ is configured with astraight folding line 20′, which constitutes a chord of theannular element 8′ and is located at a distance d2 from the centre line c. The configuration with foursupport members 18′ will result in a relatively small opening area a2 in thebottom 12′ of the container. The smaller the number of support members the smaller is the area of the opening in the bottom. With regard to the risk for appearance of tear-off edges in lack of guiding folding support, similar advantages are achieved as in the embodiment with eight openable flaps as illustrated inFIG. 4 . The fact is that such a small number as fouropenable flaps 16′ even implies a greater risk, as eachfolding line 20′ is proportionately longer and thereby more sensitive to be broken in pieces than in the embodiment with eight flaps. -
FIG. 6 illustrates the rear part of a weapon comprising abarrel 24 accommodating an ammunition part with a projectile, shell or the like (not shown) and thecountermass container arrangement 2 sectioned through lines A1-A1; A2-A2. It is evident that theannular element 8 is configured at one end (the rear end) of thesleeve 4, which is arranged to interact between the countermass container 10 and thebarrel 24. In addition, the countermass container 10 is mounted in thesleeve 4 with eachsupport member 18 of the annular element located close to thecorresponding base region 22 of eachflap 16 in the openable bottom 12, which base region is integral with the wall of thecountermass container 10. -
FIG. 7 is a detailed section view on a larger scale of a representative bottom part of the container arrangement inFIG. 6 , which illustrates in dashed lines oneflap 16 in its open state. Thesleeve 4 including theappropriate support member 18 integrated in theannular element 8 has an outer diameter DS and is supported by thebarrel 24. When firing the ammunition saidflap 16 has been bent open to its open state by influence of the counter mass. It appears that theflap 16 has been bent over thesupport member 18 and the material of the flap in a hinge part in abutment against thesupport member 18 has been deformed to such an extent that itsfree end 26 is located close to thebarrel 24, whereby afolding edge 28 is formed of said material in abutment against the support member. - Firstly, said
folding edge 28 would be located a distance from the inside of thebarrel 24, approximately the same as the outer diameter Ds of thesleeve 4, which determines the actual location of thefolding line 20, which in turn depends on the number of flaps chosen, compare distance d1 inFIG. 4 with distance d2 inFIG. 5 from the centre line c. Secondly, to d1,d2 or any optional such distance the thickness of the material in the flap should be added, which would result in a distance da from the centre line c. The actual distance da is the decisive design parameter for defining the opening area a1, a2 of the container. Hence, by varying the number of flaps it is achievable to control the opening area of the container. The described embodiments are disclosed with eight or four openable flaps only as non delimiting examples. Variants having different numbers of flaps are allowed within the scope of the invention. - Consequently, reproducible folding edges defining the opening area in the bottom of the container are formed in interaction between each opened flap and its corresponding support member.
Claims (10)
1. An arrangement for a weapon, comprising:
a countermass for reducing the pressure around the weapon,
a container enclosing the countermass, which is mountable in a barrel of the weapon behind an ammunition part, the container comprising an openable cover with break indications on an ammunition part side and an openable bottom with break indications on an other side, and
a guiding folding support arranged adjacent to said openable bottom on the outside of the bottom relative to the countermass container.
2. An arrangement according to claim 1 , wherein the guiding folding support comprises an annular element configured to fit tightly against an outside of the countermass container and in agreement with the break indications of the openable bottom.
3. An arrangement according to claim 2 , wherein the openable bottom comprises a number of openable flaps, and wherein said annular element comprises a support member for each openable flap forming part of the bottom.
4. An arrangement according to claim 3 , wherein the openable bottom comprises at least four radially extending break indications defining at least four openable flaps for interaction with corresponding support members of the annular element.
5. An arrangement according to claim 2 , wherein the annular element is arranged at one end of a sleeve, which is arranged to interact between the countermass container and the barrel.
6. An arrangement according to claim 4 , wherein each openable flap is triangular, and wherein in the open state is configured with free equilateral legs and a base region integral with the wall of the countermass container.
7. An arrangement according to claim 6 , wherein an opening area in the bottom of the counter mass container is defined by folding edges formed in each base region of the flaps in the open state as in contact with a corresponding support member.
8. An arrangement according to claim 5 , wherein the sleeve is configured for modification of a caliber of the barrel.
9. An arrangement according to claim 5 , wherein the sleeve including the annular element comprises a material having an ultimate breaking strength larger than an ultimate breaking strength of a material of the barrel at operating pressure.
10. An arrangement according to claim 3 , wherein each support member comprises a straight folding line comprising a chord of the annular element.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06124297.0 | 2006-11-17 | ||
EP06124297A EP1923656A1 (en) | 2006-11-17 | 2006-11-17 | Arrangement for weapon |
Publications (1)
Publication Number | Publication Date |
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US20100282054A1 true US20100282054A1 (en) | 2010-11-11 |
Family
ID=37920263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/984,501 Abandoned US20100282054A1 (en) | 2006-11-17 | 2007-11-19 | Arrangement for weapon |
Country Status (2)
Country | Link |
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US (1) | US20100282054A1 (en) |
EP (1) | EP1923656A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013122514A1 (en) * | 2012-02-13 | 2013-08-22 | Saab Ab | A countermass container for use in a recoilless weapon and a recoilless weapon comprising such a countermass container |
US20140007758A1 (en) * | 2011-06-29 | 2014-01-09 | Beijing Mechanical Equipment Institute | Pollution-free liquid balancing device |
WO2018111175A1 (en) * | 2016-12-15 | 2018-06-21 | Saab Ab | Counter mass container for a weapon |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4029017A (en) * | 1975-02-06 | 1977-06-14 | Dynamit Nobel Aktiengesellschaft | Propellant charge igniter |
US20050217468A1 (en) * | 2003-06-05 | 2005-10-06 | Saab Ab | Arrangement for weapon |
US6971299B2 (en) * | 2002-01-31 | 2005-12-06 | Saab Ab | Countermass weapon |
US20060249011A1 (en) * | 2003-06-05 | 2006-11-09 | Saab Ab | Arrangement for weapon |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE444722B (en) * | 1982-10-20 | 1986-04-28 | Ffv Affersverket | BACKGROUND OF THE INVENTION AND COMPOSITION OF A WASHING BOARD AND A SOLID PART, INTENDED FOR RECYCLED WEAPONS |
SE506253C2 (en) * | 1995-04-11 | 1997-11-24 | Simbal Ab | Device at the bottom washer |
-
2006
- 2006-11-17 EP EP06124297A patent/EP1923656A1/en not_active Withdrawn
-
2007
- 2007-11-19 US US11/984,501 patent/US20100282054A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4029017A (en) * | 1975-02-06 | 1977-06-14 | Dynamit Nobel Aktiengesellschaft | Propellant charge igniter |
US6971299B2 (en) * | 2002-01-31 | 2005-12-06 | Saab Ab | Countermass weapon |
US20050217468A1 (en) * | 2003-06-05 | 2005-10-06 | Saab Ab | Arrangement for weapon |
US20060249011A1 (en) * | 2003-06-05 | 2006-11-09 | Saab Ab | Arrangement for weapon |
US7353739B2 (en) * | 2003-06-05 | 2008-04-08 | Saab Ab | Arrangement for weapon |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140007758A1 (en) * | 2011-06-29 | 2014-01-09 | Beijing Mechanical Equipment Institute | Pollution-free liquid balancing device |
US8707847B2 (en) * | 2011-06-29 | 2014-04-29 | Beijing Mechanical Equipment Institute | Pollution-free liquid balancing device |
WO2013122514A1 (en) * | 2012-02-13 | 2013-08-22 | Saab Ab | A countermass container for use in a recoilless weapon and a recoilless weapon comprising such a countermass container |
US9464855B2 (en) | 2012-02-13 | 2016-10-11 | Saab Ab | Countermass container for use in a recoilless weapon and a recoilless weapon comprising such a countermass container |
WO2018111175A1 (en) * | 2016-12-15 | 2018-06-21 | Saab Ab | Counter mass container for a weapon |
US11041700B2 (en) | 2016-12-15 | 2021-06-22 | Saab Ab | Counter mass container for a weapon |
Also Published As
Publication number | Publication date |
---|---|
EP1923656A1 (en) | 2008-05-21 |
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