EP0123266B1 - Projectile à sabot - Google Patents

Projectile à sabot Download PDF

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Publication number
EP0123266B1
EP0123266B1 EP84104378A EP84104378A EP0123266B1 EP 0123266 B1 EP0123266 B1 EP 0123266B1 EP 84104378 A EP84104378 A EP 84104378A EP 84104378 A EP84104378 A EP 84104378A EP 0123266 B1 EP0123266 B1 EP 0123266B1
Authority
EP
European Patent Office
Prior art keywords
projectile
zone
air compartment
sabot
accordance
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
Application number
EP84104378A
Other languages
German (de)
English (en)
Other versions
EP0123266A1 (fr
Inventor
Hansjörg Becker
Gerhard Dr. Glotz
Jürgen Dr. Böcker
Jürgen Leeker
Walter Simon
Jean-Clause Sauvestre
Patrick Montier
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.)
Rheinmetall Industrie AG
Direction General pour lArmement DGA
Original Assignee
Rheinmetall GmbH
Direction General pour lArmement DGA
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 Rheinmetall GmbH, Direction General pour lArmement DGA filed Critical Rheinmetall GmbH
Priority to AT84104378T priority Critical patent/ATE30081T1/de
Publication of EP0123266A1 publication Critical patent/EP0123266A1/fr
Application granted granted Critical
Publication of EP0123266B1 publication Critical patent/EP0123266B1/fr
Expired 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/20—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
    • F42B12/22—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction
    • F42B12/24—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction with grooves, recesses or other wall weakenings
    • 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 sabot projectile with a large length / diameter ratio with a sabot consisting of segments, which has an air pocket on the front.
  • a projectile of the aforementioned type is known from DE-C-1 703 507.
  • the sabot has the air pocket in the front support and a rear edge in the vicinity of the second support, around which the segments are detached from the balancing projectile.
  • the swinging of the projectile can severely impair both its accuracy and its penetration.
  • the latter relates primarily to the effect against new types of targets, which require both particularly long projectiles with a ratio of length to diameter that is significantly higher than 10, as well as the greatest possible freedom of oscillation.
  • Studies on the behavior of projectile-sabot arrangements have shown that unstable flow conditions can occur in the area around the front part of the projectile, which impair the uniform segment-wise detachment of the sabot.
  • the invention is therefore based on the object to achieve a trouble-free detachment of the sabot in its front region in that the shock wave of the supersonic flow is kept away from the air pocket of the sabot and that the same pressure conditions are created within the air pocket.
  • Contour discontinuities in the area of bullet tips are known from FR-A-454822, FR-A-493 570, FR-A-1 206 606, GB-A-21 05 455 and US-A-2 373 883. These are used either to improve the penetration of the bullet tip through the target, to improve ballistic properties or to allow nitroglycerin to flow through to the bullet tip.
  • the interaction of a contour discontinuity in the area of the projectile tip with an air pocket of a sabot is not apparent from the prior art.
  • the floor 10 is only shown in parts in all figures. 1 to 3 preferably show a tip region of the projectile 10, while in FIGS. 4 and. 5 the front area of the sabot, also shown there only in parts, is shown.
  • a sabot projectile of the type described acts only because of its kinetic energy and contains no explosive charge.
  • the peripheral region 16 in the vicinity of the tip 18 has an annular projection 34.
  • the tip body 15 has a cone tip 22 with a rear step 24 which establishes a jump in diameter.
  • the tip body 15 is provided on the front with a hemisphere 26, the rear base surface of which has a step 28 for achieving a jump in diameter.
  • the tip body 15 consists of z. B. nine circular cylinder bodies 36, 40, 44, 48, 52, 56, 60, 64 and 68.
  • the circular cylinder body 36 forms the tip 18 with a comparatively small diameter and is delimited on the rear by a step 38 which delimits the subsequent circular cylinder body 40 on the front side of a comparatively larger diameter.
  • Further steps 42, 46, 50, 54, 58, 62, 66 and 70 form jumps in diameter between the adjacent circular cylinder bodies, each with a larger diameter, step 70 being delimited on the circumferential side by the base edge 14 between the circular cylinder rod 11 and the front region 12.
  • the structures shown all lead to at least one contour discontinuity in the front area 12.
  • the pressure fluctuations which have a detrimental effect on the detachment behavior of the sabot segments from the projectile are avoided.
  • an angle that a head wave of the front region 12 generates becomes larger or smaller. At a larger angle, a flatter head wave profile is formed. In this way, a profile can be formed in which the head shaft no longer hits the front edge of the sabot. This also prevents interference with the detachment process.
  • Lichen tube caliber area 76 of the sabot 72 surrounds the air pocket 74.
  • the area 76 extends from a front edge 78 to a rear edge 80.
  • the edge 80 delimits a rear surface 82 which leads into a tapered central area 84.
  • a front surface 86, 88 forming the air pocket 74 is delimited on the front by a circular edge 90.
  • a track 92, which connects the circular edge 90 to the edge 78, is curved such that its center of curvature (s) lies on the side of the circular edge 90 facing away from the front region 12, not shown.
  • the retraction of the circular edge 90 ensures that it is not hit by the above-mentioned head wave, interfering with the detachment process.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Testing Of Engines (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Saccharide Compounds (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Steroid Compounds (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Memory System Of A Hierarchy Structure (AREA)
  • Tires In General (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Toys (AREA)

Claims (7)

1. Projectile à cage de propulsion (10) présentant un rapport longueur-diamètre important, comportant une cage de propulsion (72) comprenant des segments, qui comporte antérieurement une poche d'air (74), caractérisé en ce que le projectile 10 présente dans la zone antérieure (12) une structuration déterminée, d'après la position (distance à la cage de propulsion) et la forme, selon la configuration de la poche d'air (74) de telle façon que la limite entre le domaine d'écoulement supersonique dans lequel l'air longe la zone antérieure (12) jusqu'à la séparation de l'écoulement supersonique, est fixée de telle façon que, d'une part, l'onde d'ogive de l'écoulement supersonique n'atteint pas l'intérieur de la poche d'air (74) et que d'autre part, il s'établit dans la zone comprise entre la poche d'air (74) et la structuration, un écoulement de recirculation et, par suite, une pression constante dans la poche d'air (74) permettant d'obtenir la séparation uniforme des segments.
2. Projectile selon la revendication 1, caractérisé par une structuration sous la forme d'au moins une discontinuité de profil dans la zone périphérique (16) de la zone antérieure 12 en forme de discontinuité de diamètre (24) (figure 2a).
3. Projectile selon la revendication 1 ou 2, caractérisé par des gradins circulaires (24, 28, 32, 34, 38, 42, 46, 50, 54), comme discontinuité de profil (figure 3).
4. Projectile selon l'une des revendications 1 à 3, caractérisé par une rainure annulaire circulaire (20) dans la zone périphérique (16) du corps d'ogive (15), comme discontinuité de profil (figure 1).
5. Projectile selon l'une des revendications 1 à 4, caractérisé en ce que la zone extérieure (76) de la cage de propulsion (72) entourant la poche d'air (74) comporte, à partir d'un bord antérieur (78), un raccordement (92) incurvé vers le projectile jusqu'au bord circulaire (90) qui se trouve plus près du projectile (10) que la zone extérieure (76) entourant la poche d'air, dans une mesure prédéterminée selon la position de l'onde d'ogive (figure 4).
6. Projectile selon la revendication 5, caractérisé en ce que la paroi intérieure (88) de la poche d'air (74) présente une courbure inclinée vers le projectile et en ce qu'il est formé, entre elle et le sillon de raccordement (92), une zone à paroi mince (100) s'achevant par une pointe aiguë (90) (figure 5).
EP84104378A 1983-04-23 1984-04-18 Projectile à sabot Expired EP0123266B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84104378T ATE30081T1 (de) 1983-04-23 1984-04-18 Treibkaefiggeschoss.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833314750 DE3314750A1 (de) 1983-04-23 1983-04-23 Mittel zum verbessern des abloeseverhaltens von treibkaefigsegmenten von einem wuchtgeschoss fuer die rohrwaffe
DE3314750 1983-04-23

Publications (2)

Publication Number Publication Date
EP0123266A1 EP0123266A1 (fr) 1984-10-31
EP0123266B1 true EP0123266B1 (fr) 1987-09-30

Family

ID=6197165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84104378A Expired EP0123266B1 (fr) 1983-04-23 1984-04-18 Projectile à sabot

Country Status (14)

Country Link
EP (1) EP0123266B1 (fr)
JP (1) JPS61500076A (fr)
KR (1) KR850000664A (fr)
AT (1) ATE30081T1 (fr)
AU (1) AU557827B2 (fr)
BR (1) BR8406813A (fr)
DE (2) DE3314750A1 (fr)
DK (1) DK155857C (fr)
ES (1) ES287013Y (fr)
GR (1) GR81472B (fr)
IN (1) IN161067B (fr)
PT (1) PT78472B (fr)
TR (1) TR22229A (fr)
WO (1) WO1984004380A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2241309B (en) * 1986-02-20 1992-02-05 Royal Ordnance Plc Projectiles and components therefor
DE4007103A1 (de) * 1990-03-07 1991-09-12 Rheinmetall Gmbh Treibkaefig
DE4022462A1 (de) * 1990-07-14 1992-01-16 Diehl Gmbh & Co Luftverbringbares unterwasser-projektil
DE69606950T2 (de) * 1995-06-07 2000-11-16 Raytheon Co Aerodynamisch stabilisiertes projektilsystem zur anwendung gegen unterwasserobjekte
KR970705001A (ko) * 1995-06-07 1997-09-06 완다케이. 델슨-로우 수중 물체에 사용하기 위한 자이로스코프식으로 안정화된 발사체 시스템
AU686954B2 (en) * 1995-06-07 1998-02-12 Raytheon Company Full caliber projectile for use against underwater objects

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR454822A (fr) * 1912-09-26 1913-07-16 Robert Abbott Hadfield Perfectionnements aux chapeaux de projectiles perce-cuirasse
FR493570A (fr) * 1916-10-16 1919-08-13 Bento Caeiro Procédé et dispositif pour augmenter la portée des projectiles
US2373883A (en) * 1942-10-30 1945-04-17 Clyde B Ferrel Shell structure
FR1206606A (fr) * 1951-11-07 1960-02-10 Tech De Rech S Ind & Mecanique Projectile empenné
US3672304A (en) * 1970-03-30 1972-06-27 Lockheed Aircraft Corp Special purpose firearms projectile
DE2323244C3 (de) * 1973-05-09 1979-04-19 Rheinmetall Gmbh, 4000 Duesseldorf Flügelstabilisiertes Unterkalibergeschoß
US4405100A (en) * 1981-02-20 1983-09-20 The United States Of America As Represented By The Secretary Of The Navy Turbulence generator for maximizing configuration tolerances of free flight ordnance
SE444983B (sv) * 1981-09-09 1986-05-20 Bofors Ab For ovningsendamal utskjutbar fenstabiliserad ammunitionsenhet

Also Published As

Publication number Publication date
JPS61500076A (ja) 1986-01-16
DK544884D0 (da) 1984-11-15
AU2822484A (en) 1984-11-19
IN161067B (fr) 1987-09-26
ES287013U (es) 1985-11-16
ES287013Y (es) 1986-06-16
PT78472A (en) 1984-05-01
GR81472B (fr) 1984-12-11
DK155857C (da) 1989-10-02
DE3314750A1 (de) 1984-10-25
TR22229A (tr) 1986-10-09
BR8406813A (pt) 1985-03-19
DK155857B (da) 1989-05-22
AU557827B2 (en) 1987-01-08
ATE30081T1 (de) 1987-10-15
DK544884A (da) 1984-11-15
EP0123266A1 (fr) 1984-10-31
WO1984004380A1 (fr) 1984-11-08
KR850000664A (ko) 1985-02-28
PT78472B (en) 1986-03-20
DE3466593D1 (en) 1987-11-05

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