EP0626558A1 - Sabot pour projectile sous-calibré - Google Patents

Sabot pour projectile sous-calibré Download PDF

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Publication number
EP0626558A1
EP0626558A1 EP94105950A EP94105950A EP0626558A1 EP 0626558 A1 EP0626558 A1 EP 0626558A1 EP 94105950 A EP94105950 A EP 94105950A EP 94105950 A EP94105950 A EP 94105950A EP 0626558 A1 EP0626558 A1 EP 0626558A1
Authority
EP
European Patent Office
Prior art keywords
sabot
slots
segments
predetermined breaking
projectile
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.)
Granted
Application number
EP94105950A
Other languages
German (de)
English (en)
Other versions
EP0626558B1 (fr
Inventor
Walter Engel
Rudolf Rossmann
Anton Ernst
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.)
RWM Schweiz AG
Original Assignee
Oerlikon Contraves Pyrotec AG
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 Oerlikon Contraves Pyrotec AG filed Critical Oerlikon Contraves Pyrotec AG
Publication of EP0626558A1 publication Critical patent/EP0626558A1/fr
Application granted granted Critical
Publication of EP0626558B1 publication Critical patent/EP0626558B1/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
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/061—Sabots for long rod fin stabilised kinetic energy projectiles, i.e. multisegment sabots attached midway on the projectile

Definitions

  • the invention relates to a dropable sabot for a sub-caliber floor according to the preamble of the claim.
  • the segments cannot detach themselves freely from the arrow, they transmit impulses caused by small asymmetries to the projectile body when detached. These undesirable impulses cause strong initial fluctuations, which results in greater scatter of hits and time-of-flight scatter.
  • DE-30 50 474 C1 describes a sabot - for a sub-caliber wing-stabilized projectile - with a one-piece body that is slit by machining to pre-segment.
  • the slots are made in the shape of the one-piece sabot cage body in such a way that additional material bridges form predetermined breaking points between the individual pre-segments, the slots being filled with appropriately designed sheet metal elements for sealing.
  • the further material bridge provided in the axially central region of the sabot body is formed by slots arranged opposite one another, each of which lies in a plane parallel to a diameter.
  • the object which is to be achieved with the present invention is to create a sabot which detaches itself more reliably and without interference from the projectile body, if possible without putting the projectile body in initial oscillations.
  • This special arrangement of separating surfaces between the individual segments of the sabot body means that when these segments are detached from the projectile body, the segments are prevented from bumping against the projectile body.
  • a sabot projectile 10 has an arrow projectile body 11 which has stabilizing wings 12 at its rear end.
  • the tip of the arrow projectile body 11 is located in a hood 13 which is attached to a sabot 14.
  • the arrow projectile body 11 has a thread 15 onto which the sabot 14 is screwed.
  • the sabot 14 is composed of a sabot jacket 17 and a sabot body 16.
  • the sabot jacket 17 is preferably made of plastic.
  • Aluminum is preferably suitable for the sabot body 16.
  • the hood 13 is also preferably made of plastic.
  • the sabot body 16 and sabot jacket 17 are connected to one another in the usual way via a number of circumferential grooves 18 (see in particular FIGS. 7 and 8).
  • the sabot body 16 is also provided by separating surfaces 29 or slots or grooves 19 assigned predetermined breaking points 22, see FIGS. 7 and 8, divided into segments 20. According to FIG. 2a, the segment separation is carried out with separating surfaces 29 known per se. According to FIG.
  • three slots or grooves 19 are preferably provided evenly distributed over the circumference, as a result of which three segments 20 are formed.
  • the slots or grooves 19 are widened at the outer end via shoulders 21 (see also FIGS. 5 and 6).
  • a predetermined breaking point 22 is provided, which is described in detail below.
  • a centrifugal force A acts on a single segment 20 of the sabot body 16, which attempts to detach the segment 20 from its two adjacent segments 20.
  • a force B1 and B2 which can be of different sizes but are the same here, acts on the two predetermined breaking points 22, which connect the segment 20 to the two adjacent segments 20, depending on the distance of the center of gravity S from these predetermined breaking points 22 If the distance a of one predetermined breaking point 22 from the center of gravity S is somewhat smaller than the distance b from the other predetermined breaking point 22 from this center of gravity S, then the force B1 is somewhat greater than the force B2.
  • the two forces B1 and B2 can be broken down into a tensile force D and a shear force E.
  • the slots or grooves 19 are not arranged in a radial plane, but at a distance d parallel to such a radial plane.
  • This arrangement of the slots or grooves 19 and also of the separating surfaces 29 according to FIG. 2a at a distance d from a radial plane in a region that is still to be defined is considered essential to the invention, since it significantly improves the detachment of the segments 20 from the projectile body 11, as in the following to be explained in particular with reference to the preferred slots 19.
  • a centrifugal force A acts on an individual segment 20 of the sabot body, which attempts to separate the segment 20 from its two adjacent segments 20.
  • a force B1 and B2 which are very different here, thus acts on the two predetermined breaking points 22, which connect the segment 20 to the two adjacent segments 20. Since the distance a between the predetermined breaking point 22 and the center of gravity S is much smaller than the distance b between the other predetermined breaking point 22, the force B1 is considerably greater than the force B2.
  • the two forces B1 and B2 can be broken down into a tensile force D and a shear force E.
  • the predetermined breaking point 22 extends in the axial direction over the entire length of the sabot body 16. According to FIG. 8, a predetermined breaking point 22 is only present at the front and rear end of the sabot body 16. However, one of these predetermined breaking points 22, ie at the rear end or at the front end of the sabot body 16, can also be dispensed with.
  • the arrangement of the slots or grooves 19 between the segments 20 of the sabot body 16 parallel to a radial plane and at the required distance has the particular advantage that the sealing of these slots or grooves 19 can be significantly improved, as a comparison of FIGS. 5 and 6 shows.
  • This gas pressure is indicated by radial arrows G. 5
  • the plastic mass of the jacket 17 located in the slot 19, which is only shown in FIG. 1, is pressed against the shoulders 21.
  • the seal is essentially guaranteed by these shoulders.
  • the individual segments 20 are pressed more strongly against one another by the gas pressure G, which ensures a better seal.
  • the effective gas pressure area is larger.
  • the sabot jacket 17 is also divided into three jacket segments 26 by three radial slots or grooves 23, which are connected to one another by three predetermined breaking points 24.
  • Each segment 26 has two cutouts 25 in order to avoid unnecessary masses.
  • these slots or grooves 23 are not arranged in a radial plane, but at a distance d1 (which may be the same or different from the distance d in FIGS. 3 and 4) parallel to such a radial plane.
  • the slots or grooves 23 of the sabot jacket 17 can coincide with the slots or grooves 19 of the sabot body 16 or be offset from one another.
  • either a sabot jacket 17 which has radially arranged slots 23 or slots 23 which are arranged at a distance parallel to a radial plane can be used.
  • the predetermined breaking point 22 shown in FIG. 7 is of equal strength over the entire length, i.e. dimensioned the same, but it can be made weaker to the front or to the rear (seen in the firing direction) in order to avoid an inclined position of the segments 20 after detachment from the projectile body 11.
  • the predetermined distance d between the slot 19 and the corresponding radial plane is smaller than the radius R of the bore provided for the projectile body 11.
  • the predetermined distance d between the slot 19 and the corresponding radial plane is somewhat larger than the radius R of the bore, e.g. around the dimension of a predetermined breaking point 22. Experiments have shown that this larger distance d is more advantageous. It is thus determined according to the invention that the distance d corresponds to at least half the amount of the radius R of the projectile body 11.
  • the separating surfaces 29 or slots or grooves 19 according to FIGS. 3 and 4 can preferably be arranged instead of parallel skew to the corresponding radial planes.
  • each segment 20 fly after their detachment from the projectile body 11 in the direction of arrow V, ie tangentially to the projectile body 11 thereof.
  • each segment 20 begins to rotate about its center of gravity S, as indicated by the arrow W.
  • the segment 20 By moving in the direction of the arrow V, the segment 20 first abuts the projectile body 11 with an edge 27 of a predetermined breaking point 22 and by rotating the segment 20 around the center of gravity S in the direction of the arrow W, the segment 20 then abuts with an edge 28 the other predetermined breaking point 22 against the Projectile body 11. This causes the projectile body 11 to be deflected from the desired path.
  • each segment 20 of the sabot body 16 fly after they have been detached from the projectile body 11 in the direction of arrow V, i.e. tangential to the projectile body 11 thereof.
  • each segment 20 begins to rotate about its center of gravity S, as indicated by the arrow W. Thanks to the different arrangement of the slots 19, neither the edge 27 of one predetermined breaking point 22 nor the edge 28 of the other predetermined breaking point 22 can abut against the projectile body 11.
  • the slots 19 are arranged at a distance d parallel to the corresponding radial plane, and this distance d is chosen such that the abovementioned impacts are avoided.
  • the air resistance acting on a segment 20 is indicated in FIGS. 11, 12 and 13 by the distances c and e. 11, the distance c is greater than the distance e, so the air resistance acts in the direction of arrow W and supports the rotation of the segment around the center of gravity S. According to FIGS. 12 and 13, the distance c is smaller than the distance e, thus the air resistance counteracts the rotation in the direction of the arrow W and reduces or prevents the risk that the edge 28 of the segment 20 hits the projectile body 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
  • Testing Of Engines (AREA)
  • Centrifugal Separators (AREA)
  • Powder Metallurgy (AREA)
EP94105950A 1993-05-27 1994-04-18 Sabot pour projectile sous-calibré Expired - Lifetime EP0626558B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1594/93 1993-05-27
CH159493 1993-05-27

Publications (2)

Publication Number Publication Date
EP0626558A1 true EP0626558A1 (fr) 1994-11-30
EP0626558B1 EP0626558B1 (fr) 1998-06-10

Family

ID=4214072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94105950A Expired - Lifetime EP0626558B1 (fr) 1993-05-27 1994-04-18 Sabot pour projectile sous-calibré

Country Status (7)

Country Link
US (1) US5481980A (fr)
EP (1) EP0626558B1 (fr)
JP (1) JP3338177B2 (fr)
CA (1) CA2121101C (fr)
DE (1) DE59406172D1 (fr)
ES (1) ES2117981T3 (fr)
NO (1) NO302672B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008034975A2 (fr) 2006-09-22 2008-03-27 Nexter Munitions Projectile sous-calibre comportant un sabot asymetrique
WO2021254778A1 (fr) * 2020-06-15 2021-12-23 Rheinmetall Waffe Munition Gmbh Sabot

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8297268B2 (en) * 2007-01-23 2012-10-30 Bill Whistler Kenworthy Apparatus for launching subcaliber projectiles at propellant operating pressures including the range of operating pressures that may be supplied by human breath
US20130213376A1 (en) * 2007-01-24 2013-08-22 Bill Whistler Kenworthy Apparatus for launching subcaliber projectiles at propellant operating pressures including the range of pressures that may be supplied by human breath
WO2011038369A1 (fr) * 2009-09-25 2011-03-31 John William Hunter Véhicule pour le lancement à partir d'un canon à gaz
US9567107B2 (en) 2009-09-25 2017-02-14 Quicklaunch, Inc. Gas gun launcher
RU2460964C2 (ru) * 2010-09-13 2012-09-10 Государственное Образовательное Учреждение Высшего Профессионального Образования "Московский Государственный Технический Университет Имени Н.Э. Баумана" Поддон для метаемого элемента и способ отделения поддона от метаемого элемента
US10427804B1 (en) 2016-04-29 2019-10-01 Quicklaunch, Inc. Orbital mechanics of impulsive launch
US11267588B2 (en) 2016-04-29 2022-03-08 Quicklaunch, Inc. Orbital mechanics of impulsive launch
RU2685011C1 (ru) * 2017-12-28 2019-04-16 федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технический университет имени Н.Э. Баумана (национальный исследовательский университет)" (МГТУ им. Н.Э. Баумана) Поддон для метаемого измерительного зонда

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3050474C1 (de) * 1980-09-03 1986-06-26 L'Etat Français représenté par le Délégué Général pour l'Armement, Paris Aus einem einstueckigen Rohling gefertigter Treibkaefig
EP0300373A2 (fr) * 1987-07-20 1989-01-25 Oerlikon-Contraves AG Projectile sous-calibré stabilisé par ailettes
US4881466A (en) * 1988-12-23 1989-11-21 General Electric Company High velocity sabot for spin stabilized penetrator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927618A (en) * 1971-03-29 1975-12-23 Oerlikon Buehrle Ag Sabot projectile
CH632086A5 (de) * 1978-08-08 1982-09-15 Oerlikon Buehrle Ag Verfahren zur herstellung eines treibspiegelgeschosses und nach dem verfahren hergestelltes treibspiegelgeschoss.
DE3033041C2 (de) * 1980-09-03 1986-04-10 L'Etat Français représenté par le Délégué Général pour l'Armement, Paris Treibkäfig aus Metall und Kunststoff
US4815682A (en) * 1987-07-20 1989-03-28 Pacific Armatechnica Corporation Fin-stabilized subcaliber projectile and method of spin tuning
US4901646A (en) * 1987-07-20 1990-02-20 Pacific Armatechnica Corporation Fin-stabilized subcaliber projectile
FR2653873B1 (fr) * 1989-10-26 1992-01-03 France Etat Armement Projectile sous-calibre comportant un noyau, un sabot et une chemise.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3050474C1 (de) * 1980-09-03 1986-06-26 L'Etat Français représenté par le Délégué Général pour l'Armement, Paris Aus einem einstueckigen Rohling gefertigter Treibkaefig
EP0300373A2 (fr) * 1987-07-20 1989-01-25 Oerlikon-Contraves AG Projectile sous-calibré stabilisé par ailettes
US4881466A (en) * 1988-12-23 1989-11-21 General Electric Company High velocity sabot for spin stabilized penetrator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008034975A2 (fr) 2006-09-22 2008-03-27 Nexter Munitions Projectile sous-calibre comportant un sabot asymetrique
FR2906360A1 (fr) * 2006-09-22 2008-03-28 Giat Ind Sa Projectile sous calibre comportant un sabot asymetrique.
WO2008034975A3 (fr) * 2006-09-22 2008-05-22 Nexter Munitions Projectile sous-calibre comportant un sabot asymetrique
WO2021254778A1 (fr) * 2020-06-15 2021-12-23 Rheinmetall Waffe Munition Gmbh Sabot

Also Published As

Publication number Publication date
JPH0771900A (ja) 1995-03-17
DE59406172D1 (de) 1998-07-16
EP0626558B1 (fr) 1998-06-10
US5481980A (en) 1996-01-09
NO941608L (no) 1994-11-28
NO941608D0 (no) 1994-05-02
ES2117981T3 (es) 1998-09-01
JP3338177B2 (ja) 2002-10-28
CA2121101A1 (fr) 1994-11-28
CA2121101C (fr) 1998-02-24
NO302672B1 (no) 1998-04-06

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