EP0262288A1 - Spin-stabilized bomblet-carrying missile - Google Patents

Spin-stabilized bomblet-carrying missile Download PDF

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Publication number
EP0262288A1
EP0262288A1 EP87105840A EP87105840A EP0262288A1 EP 0262288 A1 EP0262288 A1 EP 0262288A1 EP 87105840 A EP87105840 A EP 87105840A EP 87105840 A EP87105840 A EP 87105840A EP 0262288 A1 EP0262288 A1 EP 0262288A1
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EP
European Patent Office
Prior art keywords
bomblet
carrier
bomblets
projectile
spin
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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
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EP87105840A
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German (de)
French (fr)
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EP0262288B1 (en
Inventor
Heinz-Josef Dr.-Ing. Kruse
Karin Fey
Klaus Dietmar Karius
Hartmut Dr. Schilling
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Rheinmetall Industrie AG
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Rheinmetall GmbH
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Publication of EP0262288A1 publication Critical patent/EP0262288A1/en
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Publication of EP0262288B1 publication Critical patent/EP0262288B1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/56Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
    • F42B12/58Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles
    • F42B12/62Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles the submissiles being ejected parallel to the longitudinal axis of the projectile

Definitions

  • the invention relates to a spin-stabilized bomblet carrier projectile with bomblets and filling pieces arranged between the bomblets and the shell of the carrier projectile.
  • the filling pieces are usually made of plastic or aluminum and are used both for fixing the bomblets in the carrier projectile and for swirling the carrier projectile onto the bomblets.
  • the longitudinal and transverse moments of inertia of the bomblet carrier projectile, which determine the flight stability, are essentially determined in these known projectiles by the masses of the bomblets, the floor of the projectile, the carrier projectile envelope and the projectile tip and the ejection charge located in the projectile tip.
  • a rotating projectile is regarded as stable if an angle of attack generated by a fault also disappears.
  • the invention is therefore based on the object of achieving the mass distribution (or moments of inertia) required for flight stability in a particularly simple manner in bomblet carrier projectiles with a thin casing.
  • this object is achieved in that the material of the filling pieces is selected accordingly and the filling pieces are placed accordingly in the bomblet carrier floor.
  • Filling pieces made of steel or tungsten heavy metal (WSM) are used.
  • Fig. 1 denotes a bomblet carrier floor, 2 the carrier floor tip in which the ejection charge 20 is located, 3 the shell of the carrier floor and 4 the bottom of the carrier floor.
  • FIG. 2 shows a cross section through the above-mentioned bomblet carrier floor.
  • the bomblets were again designated with 30, the shell of the carrier storey with 3 and the filler pieces which are present in this cross-sectional position with 34.
  • the bomblet carrier projectile 1 which can be, for example, a 155 mm projectile, ignites the ejection charge 20 after a predetermined period of time.
  • the bomblets 30 are pushed out to the rear by the gas pressure which arises in the tip-side part of the projectile. In the present example, six bomblet layers and seven bomblets per layer are dropped on the target area.
  • the thinnest possible shell 3 should be used, i.e. H.
  • the ratio of the wall thickness of the carrier shell 3 to the tube caliber should be ⁇ 0.05.
  • the mass distribution of the bomblet carrier floor must, if it is to fly stably, be chosen so that an angle of attack generated by a fault also disappears.
  • an angle of attack generated by a fault also disappears.
  • the fillers 31, 32 and 35, 36, 37 were chosen from steel.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Pens And Brushes (AREA)
  • Toys (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

Es wird ein drallstabilisiertes Bombletgeschoß (1) mit Bomblets (30) und zwischen dem Bomblets (30) und der Hülle (3) des Trägergeschosses (1) angeordneten Füllstücken beschrieben. Um bei Bombletträgergeschossen (1) mit dünner Hülle (3) die für die Flugstabilität erforderliche Massenverteilung auf besonders einfache Weise zu erreichen, wird vorgeschlagen, daß Füllstücke (31 - 37) aus Stahl oder Wolfram-Schwermetall verwendet werden, und daß diese Füllstücke (31 - 37) derart in dem Bombletträgergechoß (1) angeordnet sind, daß letzteres bis zum Ausstoßen der Bomblets (30) stabil fliegt.A spin-stabilized bomblet projectile (1) with bomblets (30) and filling pieces arranged between the bomblets (30) and the casing (3) of the carrier projectile (1) are described. In order to achieve the mass distribution required for flight stability in a particularly simple manner in bomblet carrier projectiles (1) with a thin casing (3), it is proposed that filler pieces (31 - 37) made of steel or tungsten heavy metal are used, and that these filler pieces (31 - 37) are arranged in the bomblet carrier level (1) in such a way that the latter flies stably until the bomblets (30) are ejected.

Description

Die Erfindung betrifft ein drallstabilisiertes Bombletträgergeschoß mit Bomblets und zwischen den Bomblets und der Hülle des Trägergeschosses angeordneten Füllstücken.The invention relates to a spin-stabilized bomblet carrier projectile with bomblets and filling pieces arranged between the bomblets and the shell of the carrier projectile.

Derartige Trägergeschosse sind beispielsweise in der Zeitschrift "Wehrtechnik" 10/85 auf Seite 113 beschrieben. Auch in der US-PS 3,981,244 ist ein entsprechendes Bombletträgergeschoß in Fig. 3 abgebildet.Support beams of this type are described, for example, in the magazine "Defense Technology" 10/85 on page 113. A corresponding bomblet carrier floor is also shown in FIG. 3 in US Pat. No. 3,981,244.

Bei den bekannten Bombletträgergeschossen sind die Füllstücke üblicherweise aus Kunststoff oder Aluminium hergestellt und dienen sowohl zur Fixierung der Bomblets in dem Trägergeschoß als auch zur Drallübertragung des Trägergeschosses auf die Bomblets. Die die Flugstabilität bestimmenden Längs- und Querträgheitsmomente des Bombletträgergeschosses werden bei diesen bekannten Geschossen im wesentlichen durch die Massen der Bomblets, des Geschoßbodens, der Trägergeschoßhülle sowie der Geschoßspitze und der in der Geschoßspitze befindlichen Ausstoßladung bestimmt. Dabei wird ein rotierendes Geschoß als stabil angesehen, wenn ein durch eine Störung erzeugter Anstellwinkel auch wieder verschwindet.In the known bomblet carrier projectiles, the filling pieces are usually made of plastic or aluminum and are used both for fixing the bomblets in the carrier projectile and for swirling the carrier projectile onto the bomblets. The longitudinal and transverse moments of inertia of the bomblet carrier projectile, which determine the flight stability, are essentially determined in these known projectiles by the masses of the bomblets, the floor of the projectile, the carrier projectile envelope and the projectile tip and the ejection charge located in the projectile tip. A rotating projectile is regarded as stable if an angle of attack generated by a fault also disappears.

Verändert man die Massenverteilung des vorstehend erwähnten Bombletträgergeschoß, indem man statt der herkömmlichen Trägergeschoßhülle eine wesentlich dünnere Hülle verwendet (um beispielsweise in dem Trägergeschoß größere Bomblets (unterzubringen), so kann sich dieses auf die Flugstabilität des Bombletträgergeschosses negativ auswirken. Denn durch die Änderung der Massenverteilung erfolgt auch eine Änderung der Längs- und Querträgheitsmomente, was zu einer Änderung der Flugstabilität führen kann.If you change the mass distribution of the above-mentioned bomblet carrier floor by using a much thinner shell instead of the conventional carrier floor shell (for example, larger ones in the carrier floor) Bomblets (to accommodate), this can have a negative impact on the flight stability of the bomblet carrier floor. Because the change in the mass distribution also changes the longitudinal and transverse moments of inertia, which can lead to a change in flight stability.

Der Erfindung liegt daher die Aufgabe zugrunde, bei Bombletträgergeschossen mit dünner Hülle die für die Flugstabilität erforderliche Massenverteilung (bzw. Trägheitsmomente) auf besonders einfache Weise zu erreichen.The invention is therefore based on the object of achieving the mass distribution (or moments of inertia) required for flight stability in a particularly simple manner in bomblet carrier projectiles with a thin casing.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß das Material der Füllstücke entsprechend gewählt und die Füllstücke in dem Bombletträgergeschoß entsprechend plaziert werden. Dabei werden Füllstücke aus Stahl oder Wolfram-Schwermetall (WSM) verwendet.According to the invention, this object is achieved in that the material of the filling pieces is selected accordingly and the filling pieces are placed accordingly in the bomblet carrier floor. Filling pieces made of steel or tungsten heavy metal (WSM) are used.

Weitere Vorteile und Einzelheiten der Erfindung werden im folgenden anhand eines Ausführungsbeispieles und mit Hilfe von Figuren näher erläutert.Further advantages and details of the invention are explained in more detail below using an exemplary embodiment and with the aid of figures.

Es zeigt:

  • Fig. 1 einen Längsschnitt durch ein Bombletträgergeschoß mit Bomblets und Füllstücken; und
  • Fig. 2 den Querschnitt durch ein Bombletträgergeschoß gemäß Fig. 1 entlang der Schnittlinie II - II.
It shows:
  • 1 shows a longitudinal section through a bomblet carrier floor with bomblets and fillers. and
  • Fig. 2 shows the cross section through a bomblet carrier projectile according to FIG. 1 along the section line II - II.

In Fig. 1 sind mit 1 ein Bombletträgergeschoß, mit 2 die Trägergeschoßspitze, in der sich die Ausstoßladung 20 befindet, mit 3 die Hülle des Trägergeschosses und mit 4 der Boden des Trägergeschosses bezeichnet.In Fig. 1, 1 denotes a bomblet carrier floor, 2 the carrier floor tip in which the ejection charge 20 is located, 3 the shell of the carrier floor and 4 the bottom of the carrier floor.

Im Inneren des Bombletträgergeschosses 1 befinden sich die mit 30 bezeichneten Bomblets sowie die mit 31 - 37 gekennzeichneten Füllstücke. Der Schwerpunkt des Bombletträgergeschosses 1 wurde mit der Bezugsziffer 5 versehen. Zwischen dem Geschoßboden 4 und der hinteren, dem Geschoßboden zugewandten Bombletlage befinden sich mit 40 bezeichnete Adapterringe, welche die Zünder der hinteren Bombletlage aufnehmen.Inside the bomblet carrier level 1 are the bomblets labeled 30 and the filler pieces labeled 31-37. The center of gravity of the bomblet level 1 was provided with the reference number 5. Between the floor 4 and the rear bomblet layer facing the floor there are adapter rings, designated 40, which accommodate the detonators of the rear bomblet layer.

In Fig. 2 ist ein Querschnitt durch das vorstehend erwähnte Bombletträgergeschoß wiedergegeben. Dabei wurden die Bomblets wiederum mit 30, die Hülle des Trägergeschosses mit 3 u nd die Füllstücke, die in dieser Querschnittslage vorhanden sind, mit 34 bezeichnet.2 shows a cross section through the above-mentioned bomblet carrier floor. The bomblets were again designated with 30, the shell of the carrier storey with 3 and the filler pieces which are present in this cross-sectional position with 34.

Das Bombletträgergeschoß 1, bei dem es sich beispielsweise um ein 155 mm-Geschoß handeln kann, zündet nach einer vorgegebenen Zeitspanne die Ausstoßladung 20. Durch den im spitzenseitigen Teil des Geschosses entstehenden Gasdruck werden die Bomblets 30 nach hinten herausgedrückt. In dem vorliegenden Beispiel werden also sechs Bombletlagen und pro Lage sieben Bomblets auf das Zielgebiet abgeworfen.The bomblet carrier projectile 1, which can be, for example, a 155 mm projectile, ignites the ejection charge 20 after a predetermined period of time. The bomblets 30 are pushed out to the rear by the gas pressure which arises in the tip-side part of the projectile. In the present example, six bomblet layers and seven bomblets per layer are dropped on the target area.

Um den inneren Raum des Bombletträgergeschosses 1 möglichst optimal zu nutzen, soll eine möglichst dünne Geschoßhülle 3 verwendet werden, d. h. das Verhältnis der Wandstärke der Trägergeschoßhülle 3 zum Rohrkaliber soll < 0,05 sein.In order to make the best possible use of the inner space of the bomblet carrier level 1, the thinnest possible shell 3 should be used, i.e. H. the ratio of the wall thickness of the carrier shell 3 to the tube caliber should be <0.05.

Die Massenverteilung des Bombletträgergeschosses muß, wenn es stabil fliegen soll, so gewählt werden, daß ein durch eine Störung erzeugter Anstellwinkel auch wieder verschwindet. Zu den Stabilitätsbedingungen von drallstabilisierten Geschossen vgl. auch Rheinmetall "Waffentechnisches Taschenbuch" 7. Auflage 1985, S. 162 - 164).The mass distribution of the bomblet carrier floor must, if it is to fly stably, be chosen so that an angle of attack generated by a fault also disappears. For the stability conditions of spin-stabilized projectiles see. also Rheinmetall "Weapons technical paperback" 7th edition 1985, pp. 162-164).

Hierzu wird erfindungsgemäß vorgeschlagen, die Massenverteilung bzw. die Trägheitsmomente um die Geschoßlängsachse und um eine Querachse durch den Schwerpunkt des Bombletträgergeschosses 1 durch entsprechende Materialwahl der Füllstücke 31 - 37 sowie durch eine entsprechende Plazierung dieser Füllstücke zu erreichen.For this purpose, it is proposed according to the invention to achieve the mass distribution or the moments of inertia about the longitudinal axis of the floor and about a transverse axis through the center of gravity of the bomblet carrier level 1 by appropriate choice of material for the filler pieces 31-37 and by appropriate placement of these filler pieces.

Bei dem dargestellten Bombletträgergeschoß wurden die Füllstücke 31, 32 und 35, 36, 37 aus Stahl gewählt. Die Füllstücke 33 und 34, die sich in der Nähe des Schwerpunktes 5 befinden, bestehen aus Wolfram-Schwermetall.In the bomblet carrier floor shown, the fillers 31, 32 and 35, 36, 37 were chosen from steel. The filler pieces 33 and 34, which are in the vicinity of the center of gravity 5, consist of tungsten heavy metal.

Durch diese Anordnung der Füllstücke erhält man bei einem Bombletgewicht von 0,432 kg folgende mechanischen Daten:
Masse:      47,8kg
Längsträgheitsmoment:      163.000 kg x mm²
Querträgheitsmoment:      1.796.000 kg x mm²
Drehzahl:      U = 15.600 U/min.
This arrangement of the filling pieces gives the following mechanical data for a bomblet weight of 0.432 kg:
Weight: 47.8kg
Longitudinal moment of inertia: 163,000 kg x mm²
Transverse moment of inertia: 1,796,000 kg x mm²
Speed: U = 15,600 U / min.

Aus diesen Angaben ermittelt man einen Stabilitätsfaktor S von 1,42. Da Flugstabilität garantiert ist wenn gilt S ≧ 1, handelt es sich bei dem vorstehend beschriebenen Ausführungsbeispiel um ein stabil fliegendes Geschoß. Hätte man statt der Füllstücke aus Stahl und WSM lediglich die überlicherweise benutzten Kunststofffüllstücke benutzt, so ergäbe sich ein Stabilitätsfaktor von S = 0,79; bzw. bei Verwendung von Aluminiumfüllstücken erhielte man S = 0,86 (zur Bestimmung der Stabilitätsfaktoren vgl. auch die erwähnte Literaturstelle des Waffentechnischen Taschenbuchs von Rheinmetall). A stability factor S of 1.42 is determined from this information. Since flight stability is guaranteed when S ≧ 1 applies, the embodiment described above is a stable flying projectile. If instead of the steel and WSM filler pieces only the commonly used plastic filler pieces had been used, a stability factor of S = 0.79 would result; or if aluminum filler pieces were used one would get S = 0.86 (for the determination of the stability factors see also the mentioned literature reference of the Rheinmetall Weapons Technical Handbook).

Claims (1)

Drallstabilisiertes Bombletträgergeschoß (1) mit Bomblets (30) und zwischen den Bomblets (30) und der Hülle (3) des Trägergeschosses (1) angeordneten Füllstücken (31 - 37), dadurch gekennzeichnet, daß Füllstücke (31 - 37) aus Stahl oder Wolfram-Schwermetall verwendet werden, und daß diese Füllstücke (31 -37) derart in dem Bombletträgergeschoß (1) angeordnet sind, daß letzteres bis zum Ausstoßen der Bomblets (30) stabil fliegt.Spin-stabilized Bombletträgergeschoß (1) with bomblets (30) and between the bomblets (30) and the envelope (3) of the carrier projectile (1) is arranged filling pieces (31-37), characterized in that filler pieces (31-37) of steel or tungsten Heavy metal are used, and that these filler pieces (31-37) are arranged in the bomblet carrier floor (1) in such a way that the latter flies stably until the bomblets (30) are ejected.
EP87105840A 1986-08-30 1987-04-21 Spin-stabilized bomblet-carrying missile Expired - Lifetime EP0262288B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3629668 1986-08-30
DE3629668A DE3629668C1 (en) 1986-08-30 1986-08-30 Swirl stabilized bomblet bullet

Publications (2)

Publication Number Publication Date
EP0262288A1 true EP0262288A1 (en) 1988-04-06
EP0262288B1 EP0262288B1 (en) 1990-07-25

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EP87105840A Expired - Lifetime EP0262288B1 (en) 1986-08-30 1987-04-21 Spin-stabilized bomblet-carrying missile

Country Status (7)

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US (1) US4793260A (en)
EP (1) EP0262288B1 (en)
DE (2) DE3629668C1 (en)
DK (1) DK357387A (en)
NO (1) NO872028L (en)
PT (1) PT84915B (en)
TR (1) TR23078A (en)

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DE3841649C2 (en) * 1988-12-10 1999-05-06 Rheinmetall Ind Ag Large-caliber carrier floor for deploying exercise bomblets
DE3924397A1 (en) * 1989-07-24 1991-02-07 Rheinmetall Gmbh CARRIER FLOOR
DE3925390A1 (en) * 1989-08-01 1991-02-14 Rheinmetall Gmbh Carrier missile for small bombs - has segmented disc with recesses for fuses and forming distance piece
DE3934362A1 (en) * 1989-10-14 1991-04-18 Rheinmetall Gmbh BOMBLET CARRIER FLOOR WITH LIGHTLY EXERCISED BOMBLETS
DE4000167C2 (en) * 1990-01-05 1994-04-14 Rheinmetall Gmbh Swirl-stabilized carrier floor with a metallic guide band
FR2702557B1 (en) * 1993-03-08 1995-04-28 Giat Ind Sa Timing device for submunition.
US6374741B1 (en) * 2000-03-03 2002-04-23 New Mexico Tech Research Foundation Non-lethal projectile to be launched from a launcher
US6874425B1 (en) 2001-05-18 2005-04-05 Day & Zimmermann, Inc. Projectile carrying sub-munitions
US6640723B2 (en) * 2002-03-25 2003-11-04 The United States Of America As Represented By The Secretary Of The Navy Mission responsive ordnance
DE102007025258A1 (en) * 2007-05-30 2008-12-04 Rheinmetall Waffe Munition Gmbh warhead
DE102007057184A1 (en) * 2007-11-26 2009-05-28 Rheinmetall Waffe Munition Gmbh Ammunition or missile for battlefield lighting
FR2952424B1 (en) * 2009-11-09 2012-11-02 Nexter Munitions LARGE NON-LETHAL OBUS CALIBER STABILIZED IN ROTATION
DE102011010183A1 (en) * 2011-02-02 2012-08-02 Rheinmetall Waffe Munition Gmbh explosive projectile
EP3036498B1 (en) 2013-08-20 2017-06-07 BAE Systems PLC Smoke payload apparatus
AU2014310465B2 (en) * 2013-08-20 2017-12-14 Bae Systems Plc Common carrier munition
WO2015025145A1 (en) 2013-08-20 2015-02-26 Bae Systems Plc Illumination munition
US9784544B2 (en) * 2013-08-20 2017-10-10 Bae Systems Plc Frangible munition
SE545173C2 (en) * 2017-11-28 2023-05-02 Bae Systems Bofors Ab Spin stabilized projectile and method for providing a horizontal dispersion pattern
FR3116894B1 (en) * 2020-12-02 2022-10-28 Nexter Munitions Gyro-stabilized projectile

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NO872028D0 (en) 1987-05-15
DE3763943D1 (en) 1990-08-30
DE3629668C1 (en) 1988-03-10
DK357387D0 (en) 1987-07-09
DK357387A (en) 1988-03-01
NO872028L (en) 1988-03-01
TR23078A (en) 1989-02-22
US4793260A (en) 1988-12-27
PT84915A (en) 1988-08-17
PT84915B (en) 1993-07-30
EP0262288B1 (en) 1990-07-25

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