EP0594689B1 - Projectile sous-calibre avec coiffe detachable - Google Patents

Projectile sous-calibre avec coiffe detachable Download PDF

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Publication number
EP0594689B1
EP0594689B1 EP92914875A EP92914875A EP0594689B1 EP 0594689 B1 EP0594689 B1 EP 0594689B1 EP 92914875 A EP92914875 A EP 92914875A EP 92914875 A EP92914875 A EP 92914875A EP 0594689 B1 EP0594689 B1 EP 0594689B1
Authority
EP
European Patent Office
Prior art keywords
projectile
segments
sub
calibre
calibre 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.)
Expired - Lifetime
Application number
EP92914875A
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German (de)
English (en)
Other versions
EP0594689A1 (fr
Inventor
Elmar Bilgeri
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.)
Steyr Daimler Puch AG
Original Assignee
Steyr Daimler Puch 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 Steyr Daimler Puch AG filed Critical Steyr Daimler Puch AG
Publication of EP0594689A1 publication Critical patent/EP0594689A1/fr
Application granted granted Critical
Publication of EP0594689B1 publication Critical patent/EP0594689B1/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
    • F42B14/064—Sabots enclosing the rear end of a kinetic energy projectile, i.e. having a closed disk shaped obturator base and petals extending forward from said base

Definitions

  • the invention relates to a sub-caliber projectile with a projectile core and a detachable cage, which consists of segments which pass over webs forming predetermined breaking points into foot parts which are fastened to a propelling part.
  • a detachable cage which consists of segments which pass over webs forming predetermined breaking points into foot parts which are fastened to a propelling part.
  • a sub-caliber projectile with a detachable cage which consists of segments which are torn off by air forces after leaving the barrel.
  • a conical inflow trough is provided on the cage tip at the same height as the projectile tip, the effect of which is that radially outward forces are formed by the dynamic pressure in this trough, which lead to the segments being torn apart.
  • a hypersonic flow is characterized, among other things, by the fact that the shock wave emanating from a leading edge contacts the body around which the flow is flowing, so that no back pressure can develop. In extreme cases, the segments then no longer open at all.
  • the aim of the invention to avoid the effects of the detaching cage and propelling parts on the projectile with certainty at bullets of the highest initial speed to achieve high accuracy.
  • the effect of the flow against the projectile should lead to a synchronous detachment of the segments, while the angles between the segments remain the same.
  • each of the segments has two roof-shaped inclined surfaces, which form a ridge in the weft direction, which lies in the plane of symmetry of the segment.
  • the roof-shaped design of the symmetrical guiding surfaces ensures that the resultant force of the air forces points outwards precisely in the plane of symmetry of the segment, even with hypersonic flow.
  • the ridge formed by the roof-shaped surfaces runs radially inwards to the rear (claim 2).
  • the roof-like surfaces on the outer circumference of the cage are surrounded by an essentially cylindrical wall (claim 3). This protects the roof surfaces from damage during handling and loading. Damage (especially if the segments are made of plastic) could nullify the effect of the invention.
  • the segments project forward beyond the tip of the projectile core (claim 4). This not only protects the tip of the projectile core from dirt and damage, but also provides more space for the roof-shaped surfaces.
  • the driving part engages at the rear end of the projectile (claim 5).
  • the danger of the projectile core being adversely affected by the sloping segments is further reduced, and in the case of a wing-stabilized projectile the damage to the wings.
  • the foot parts of the segments are clamped in the driving part between a pressure plate and a pressure piece (claim 6).
  • the clamping of the foot parts between the pressure piece and the pressure plate ensures that the segments are separated at the same time and precisely at the predetermined breaking points.
  • This also has the advantage that the pressure plate and the pressure piece are separate parts and you are free in the choice of materials and also the foot parts can be easily assembled.
  • the pressure plate has a centering mandrel at the rear which is pressed into the pressure piece (claim 7).
  • This attachment enables particularly high forces to be optimally transmitted to the projectile and the foot parts are particularly reliably and firmly clamped in, so that no effect can occur on the projectile even when the segment parts are torn off.
  • the core of an arrow projectile is denoted by 1 and has a tip 2, a recess 3 for positioning, a cylindrical part 4 for receiving stabilizing wings 5 and a conical rear part 6. But it could also be a spin-stabilized projectile or a projectile without a stabilizing wing.
  • the projectile 1 is surrounded by a cage 10, which can consist of a suitable plastic and which consists of segments 11, which may or may not be connected to one another and may have openings 12 or other shaped elements which are not essential to the invention.
  • the segments 11 pass over webs 13 forming predetermined breaking points into foot parts 14 which are fastened between a pressure plate 15 made of high-strength steel or titanium and a pressure piece 18 in a manner to be described.
  • the pressure plate 15 has a conical receptacle 19 at the front for a conical rear part 6 of the projectile and at the rear a centering mandrel 16 with circumferential grooves 17 of barb-like profile.
  • the pressure plate 15 is on the outer periphery of the Surround walls of the segments 11, which are very thin at this point in the present exemplary embodiments in order to create space for the stabilizing wings 5.
  • versions without such are also conceivable.
  • the front parts of the segments 11 protrude beyond the projectile tip 2 and close it together.
  • the individual segments 11 have guide surfaces 40, 41 there, the design of which significantly improves the opening of the segments 11 after leaving the barrel.
  • the pressure piece 18 is made of a suitable plastic and consists of a peripheral wall 21 which forms a driving cup 22 in its lower part. In its upper part runs a cylindrical groove 23, which are used to fasten the foot parts 14 of the segments 11. In the present case, these are individual segments 11, but all of them could also be a part connected to predetermined breaking points.
  • the segments 11 pass over the web 13 into a radially directed flange part 25, to which a collar part 24 adjoins, which is inserted into the cylindrical groove 23.
  • the peripheral wall 21 is shortened at the top to create space for the flange parts and for a mounting ring 26.
  • the centering mandrel 16 of the pressure plate 15 is pressed into a central part 27, as a result of which the foot parts 14 are held firmly between the pressure piece 18 and the pressure plate 15.
  • the centering mandrel 16 has circumferential grooves 17 with a barb-like profile, which facilitate the pressing of the mandrel into a bore in the central part 27, but prevent it from being pulled out.
  • the plastic which consists of the pressure piece 18, is selected so that there is a gas pressure acting on the driving cup easy expansion and thus sealing against the barrel results and that this plastic also has good sliding behavior.
  • the mounting ring 26 facilitates the assembly of the projectile if it consists of individual segments: the individual segments 11 are placed around the projectile 1 with the pressure plate 15 attached, and the assembly ring is then pushed over it. As a result, the individual segments 11 are connected to one another until the pressure piece 18 is pressed onto the centering mandrel 16 and the foot parts 14 are then held in this way.
  • the pressure piece 18 consists of individual disks 31 of a suitable plastic, which are firmly connected to one another by ultrasound or friction welding, and thus form a compact block which again provides the desired sealing, sliding and and has strength properties.
  • the mandrel 16 of the pressure plate 15 is also pressed into this.
  • the foot parts 14 of the sigments 11 are only flange-flange parts 32, to which a ring 33 with claws 34 is then connected again. This ring is sufficient in this embodiment to hold the flange parts 32 and also acts as a mounting ring in the manner described above.
  • FIG. 3 shows the disintegrating cage for both embodiments according to the invention after leaving the barrel. Under the action of the air flow 35, the segments are pressed apart. It can be seen that all (in this case) four segments are folded away from the projectile axis by the same angle, at which the predetermined breaking points 13 therefore break at the same time. Due to the braking effect, the speed the segments with the propelling parts are delayed so much before the predetermined breaking points take effect that the propelling parts remain with the segments without touching the projectile in any way.
  • the front part of a segment 11 is shown in detail in FIG.
  • the two surfaces 40, 41 are inclined at the same angle and form a ridge 42. In the example shown, they are flat surfaces, but they could also be spiral surfaces depending on the production method.
  • the cylindrical wall 44 only has an effect at lower speeds, but in any case protects the sensitive ridge 42 from damage.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

Dans un projectile sous-calibré, une coiffe détachable (10) est constituée de segments (11) dont les bases (14) sont fixées entre une plaque de pression (15) et un élément de pression (18). Pour assurer un détachement fiable et précis de tous les segments (11), le bout avant de chaque segment (11) présente deux surfaces (40, 41) inclinées l'une par rapport à l'autre, en forme de toit, (40, 41) et constituant une tête (42).

Claims (8)

  1. Projectile sous-calibré avec un noyau (1) et une gaine (10) largable ouverte par des forces aerodynamiques, la gaine étant composée de segments (11) qui passent par des nervures formant membres de rupture dans des pièces de base (14) rattachées à des moyens de propulsion (15,16,18,31), caractérisé en ce que la partie amont de chacun des segments (11) comporte deux surfaces (40,41) inclinées en regard à la manière d'un toit, qui forment en amont un faîtage (42) situé dans un plan de symétrie (43) du segment, ce plan de symétrie (43) contenant aussi l'axe longitudinale (36) du projectile.
  2. Projectile sous-calibré selon la revendication 1, caractérisé en ce que le tracé du faîtage (42) radialement vers l'intérieur est incliné vers l'aval.
  3. Projectile sous-calibré selon la revendication 1, caractérisé en ce que les surfaces (40,41) inclinées à la manière d'un toit sont entourées à leur périmètre d'une paroi cylindrique (44).
  4. Projectile sous-calibré selon la revendication 1, caractérisé en ce que les segments (11) enrobent le noyau (1) de projectile et le dépassent en longeur au delà de sa pointe (2).
  5. Projectile sous-calibré selon la revendication 1, caractérisé en ce que les moyens de propulsion (15,16,18) attaquent l'extèmité aval (6) du projectile (1).
  6. Projectile sous-calibré selon la revendication 5, caractérisé en ce que les pièces de base (14) des segments (11) sont serrées dans les moyens de propulsion entre une plaque de propulsion (15) et une pièce de pression (18).
  7. Projectile sous-calibré selon la revendication 6, caractérisé en ce que l'extrémité aval de la plaque de propulsion (15) est pourvue d'un mandrin de centrage (17) enfoncé dans la pièce de pression (18).
  8. Projectile sous-calibré selon la revendication 1, caractérisé en ce que les segments (11) individuels ne sont pas reliés entre eux.
EP92914875A 1991-07-17 1992-07-15 Projectile sous-calibre avec coiffe detachable Expired - Lifetime EP0594689B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT1436/91 1991-07-17
AT0143691A AT399583B (de) 1991-07-17 1991-07-17 Unterkalibriges geschoss mit abwerfbarem käfig
PCT/AT1992/000098 WO1993002334A1 (fr) 1991-07-17 1992-07-15 Projectile sous-calibre avec coiffe detachable

Publications (2)

Publication Number Publication Date
EP0594689A1 EP0594689A1 (fr) 1994-05-04
EP0594689B1 true EP0594689B1 (fr) 1995-04-05

Family

ID=3513864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92914875A Expired - Lifetime EP0594689B1 (fr) 1991-07-17 1992-07-15 Projectile sous-calibre avec coiffe detachable

Country Status (5)

Country Link
US (1) US5493974A (fr)
EP (1) EP0594689B1 (fr)
AT (1) AT399583B (fr)
DE (1) DE59201850D1 (fr)
WO (1) WO1993002334A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5668347A (en) * 1996-09-13 1997-09-16 The United States Of America As Represented By The Secretary Of The Army Kinetic energy projectile with fin leading edge protection mechanisms
FR2835602B1 (fr) * 2002-02-04 2006-11-10 Giat Ind Sa Sabot pour munition fleche
US6829997B1 (en) * 2002-05-06 2004-12-14 Terry B. Hilleman Skeletonized sabot
US20040055496A1 (en) * 2002-09-24 2004-03-25 Byer Troy Lee Ammunition
US20070234925A1 (en) * 2004-09-07 2007-10-11 Dunn Robert H Sabot allowing .17-caliber projectile use in a .22-caliber weapon
US7743709B2 (en) 2006-10-28 2010-06-29 Integrity Ballistics, Llc Sabot for elastomeric projectile
FR2954485B1 (fr) * 2009-12-21 2012-05-11 Nexter Munitions Dispositif de lancement pour projectile d'artillerie sous calibre.
US9587922B2 (en) * 2013-04-12 2017-03-07 Raytheon Company Attack capability enhancing ballistic sabot
US9188417B2 (en) * 2013-08-01 2015-11-17 Raytheon Company Separable sabot for launching payload
US10480916B1 (en) * 2017-09-07 2019-11-19 Gregory Saltz Low-observable projectile

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE524168A (fr) * 1953-04-27
DE1262830B (de) * 1964-09-02 1968-03-07 Bundesrep Deutschland Treibspiegel fuer Unterkalibergeschosse
NL133127C (fr) * 1965-04-01
LU57539A1 (fr) * 1968-12-12 1970-06-15
BE754747A (fr) * 1969-08-29 1971-01-18 Pacific Technica Corp Projectile stabilise par rotation, a sabot perdu
FR2597590B1 (fr) * 1976-04-29 1988-08-26 Saint Louis Inst Sabot de lancement pour projectiles sous-calibres
FR2445509A1 (fr) * 1978-12-28 1980-07-25 Thomson Brandt Mecanisme de lancement d'un projectile sous-calibre
US4709638A (en) * 1981-09-24 1987-12-01 Honeywell Inc. Discarding sabot projectile
SE444984B (sv) * 1982-05-28 1986-05-20 Bofors Ab Drivorgan for underkalibrig rotationsstabiliserad projektil
FR2602042B1 (fr) * 1986-07-23 1990-08-03 Sauvestre Jean Claude Projectile pour munition de chasse comportant un sabot lanceur et une balle sous-calibree a stabilisateur coulissant.
DE3635738A1 (de) * 1986-10-21 1988-05-19 Rheinmetall Gmbh Treibkaefig-fluggeschoss-anordnung
DE3811597A1 (de) * 1988-04-07 1989-10-19 Dynamit Nobel Ag Treibkaefig fuer ein unterkalibergeschoss

Also Published As

Publication number Publication date
WO1993002334A1 (fr) 1993-02-04
DE59201850D1 (de) 1995-05-11
AT399583B (de) 1995-06-26
US5493974A (en) 1996-02-27
EP0594689A1 (fr) 1994-05-04
ATA143691A (de) 1994-10-15

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