EP0274579B1 - Projectile - Google Patents

Projectile Download PDF

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Publication number
EP0274579B1
EP0274579B1 EP87114806A EP87114806A EP0274579B1 EP 0274579 B1 EP0274579 B1 EP 0274579B1 EP 87114806 A EP87114806 A EP 87114806A EP 87114806 A EP87114806 A EP 87114806A EP 0274579 B1 EP0274579 B1 EP 0274579B1
Authority
EP
European Patent Office
Prior art keywords
projectile
braking element
fact
accordance
webs
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
EP87114806A
Other languages
German (de)
English (en)
Other versions
EP0274579A1 (fr
Inventor
Reinhard Synofzik
Karl-Friedrich Doherr
Dieter Münscher
Christos Saliaris
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
Original Assignee
Rheinmetall GmbH
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 filed Critical Rheinmetall GmbH
Priority to AT87114806T priority Critical patent/ATE52611T1/de
Publication of EP0274579A1 publication Critical patent/EP0274579A1/fr
Application granted granted Critical
Publication of EP0274579B1 publication Critical patent/EP0274579B1/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
    • 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
    • F42B10/48—Range-reducing, destabilising or braking arrangements, e.g. impact-braking arrangements; Fall-retarding means, e.g. balloons, rockets for braking or fall-retarding
    • F42B10/54—Spin braking means
    • 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
    • F42B10/48—Range-reducing, destabilising or braking arrangements, e.g. impact-braking arrangements; Fall-retarding means, e.g. balloons, rockets for braking or fall-retarding
    • F42B10/50—Brake flaps, e.g. inflatable

Definitions

  • the invention relates to a projectile with a braking element arranged at its rear end for speed reduction, which can be deployed when the projectile is flying, and which consists of a fabric or a plastic film.
  • Such projectiles are known for example from DE-PS 31 27 071.
  • the braking element described therein which is intended to reduce both the speed and the stability of the projectile, is a deployable sail surface which is arranged between inflatable tubes.
  • the tubular arms are inflated by a gas generator during flight and are arranged such that the arms can be pivoted against the direction of flight by the inflation. This additionally dampens the impact of the projectile on the ground, which is particularly necessary for detachable mines.
  • the known brake elements have the disadvantage, however, that they are relatively complex since their own gas generator must be present. In addition, the stiffness of the tubular arms, as would be required with spin-stabilized projectiles, is not provided.
  • the known brake element takes up a relatively large amount of space in the folded state, which is also required in particular for the tubular arms.
  • the present invention is therefore based on the object of further developing a braking element of the type mentioned in such a way that it takes up as little space as possible in the projectile, is simple and stable, and both reduces speed and swirl in the case of swirl-stabilized projectiles.
  • An essential idea of the invention is therefore to use a fabric brake disc to reduce the speed and twist, on the edge of which additional masses are arranged, for example by means of a hem band.
  • This construction ensures that the larger masses, i.e. the edge areas of the fabric brake disks are first thrown outwards, so that the brake disk unfolds very quickly solely due to the rotation.
  • the brake disc takes up little space on the floor when folded.
  • Fig. 1 denotes a projectile which was fired by means of a gun, not shown.
  • This floor 1 contains two intelligent submunitions that are ejected from floor 1 at a predetermined time. After this ejection process, the casing 100, the submunitions 200 and 300 and the floor 400 of the projectile 1 fly one behind the other.
  • the brake elements By unfolding the brake elements (only the submunition body 300 with the brake element 30 is shown in FIG. 1 for the sake of clarity), the submunition bodies reduce their speed and move on a different trajectory than the projectile shell 100 that flies further.
  • the braking element 30 brings about both a reduction in the speed of the submunitions and a swirl reduction. As soon as both variables have dropped to a predetermined value, the braking element 30 is repelled by the submunition body (not shown).
  • the submunition bodies can be braked further and the target area can be scanned by the rotating movement (cf. in this regard, in detail, Flume, "Artillery ammunition: better effect at the target”; Wehrtechnik 1985, Issue 10, p. 112) ff).
  • the submunition body 300 shows a side view of the submunition body 300 when flying with a cut in the area of the braking element 30.
  • the submunition body 300 contains the actual active body 31, which contains, for example, a hollow charge
  • the housing 32 which processes the signal
  • one that is not shown can contain swing-out antenna and a detachable support structure 33 to which the brake disc 30 is fastened, for example by means of screws 330.
  • the annular projection 331 encloses the packaging space for the brake element 30.
  • the air forces cause the brake element 30 to have a conical shape. Appropriate masses on the edge of the brake disc or the size of the disc ensure that the air forces do not compress the brake disc.
  • FIG. 3 shows a top view of the brake disc according to the invention as shown in FIG. 2 viewed from the rear.
  • a hem band is designated, which both has the task of preventing the brake disc from tearing in its edge region 35 during the high rotations of the projectile 300.
  • it is even more essential the task of the hem band 36 is to ensure that a higher mass distribution prevails in the edge region 35 than in the remaining region of the fabric brake disc.
  • a further stability of the fabric brake disk 30 is achieved by additional belt straps 37, which are preferably arranged in a cross shape. As a result, the strength of the entire brake element 30 increases considerably.
  • the additional masses can be attached to the ends of the belt straps so that the brake disk can be opened quickly.
  • Polyamide or a plastic film of sufficient strength has proven to be a particularly good material for the fabric brake disc but also for the belt straps and the hem band.
  • the belt webbing pockets 38 can either be applied (e.g. sewn on) to the belt webbings 37 or they are formed by part of the belt webbings (37) themselves, in that the belt webbings are appropriately attached (e.g. sewn) to the fabric brake disc.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Woven Fabrics (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electromagnets (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)

Claims (10)

1. Projectile (300) comportant un élément de freinage (30) constitué par un tissu ou une feuille de matière plastique pouvant se déployer lors du vol du projectile (300), disposé à l'extrémité arrière de celui-ci, caractérisé par les caractéristiques suivantes:
a) à l'état déployé, l'élément de freinage (30) est en forme de disque, et le déploiement de l'élément de freinage (30) est provoqué par la rotation du projectile (300);
b) la répartition des masses est telle que la zone de bord (35) a une masse plus élevée que le reste de l'élément de freinage (30).
2. Projectile selon la revendication 1, caractérisé en ce que le bord extérieur (35) de l'élément de freinage (30) est muni d'une bande de bordure (36).
3. Projectile selon la revendication 1 ou 2, caractérisé en ce que l'élément de freinage (30) est renforcé à l'aide de sangles (37).
4. Projectile selon la revendication 3, caractérisé en ce que la plus grande partie des masses réparties sur le bord de l'élément de freinage (30) est disposée aux extrémités des sangles (37).
5. Projectile selon la revendication 3, caractérisé en ce que les sangles (37) sont disposées sur les deux côtés de l'élément de freinage (30).
6. Projectile selon la revendication 3, caractérisé en ce qu'au moins deux sangles croisées (37) sont disposées sur l'élément de freinage (30).
7. Projectile selon la revendication 3, caractérisé en ce que l'élément de freinage (30) et/ou les sangles (37) sont en polyamide.
8. Projectile selon la revendication 3, caractérisé en ce que les sangles (37) dépassent au-delà du bord extérieur (35) de l'élément de freinage (30).
9. Projectile selon la revendication 3, caractérisé en ce que les sangles (37) comportent des logements en ferme de poches (38), qui s'ouvrent lors de la rotation du projectile (30).
10. Projectile selon l'une des revendications 1 à 9, caractérisé en ce que l'élément de freinage (30) est de forme circulaire.
EP87114806A 1986-12-18 1987-10-10 Projectile Expired - Lifetime EP0274579B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87114806T ATE52611T1 (de) 1986-12-18 1987-10-10 Geschoss.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3643294 1986-12-18
DE19863643294 DE3643294A1 (de) 1986-12-18 1986-12-18 Geschoss

Publications (2)

Publication Number Publication Date
EP0274579A1 EP0274579A1 (fr) 1988-07-20
EP0274579B1 true EP0274579B1 (fr) 1990-05-09

Family

ID=6316505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87114806A Expired - Lifetime EP0274579B1 (fr) 1986-12-18 1987-10-10 Projectile

Country Status (6)

Country Link
US (1) US4860660A (fr)
EP (1) EP0274579B1 (fr)
JP (1) JPS63172899A (fr)
AT (1) ATE52611T1 (fr)
DE (2) DE3643294A1 (fr)
IL (1) IL84794A (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2629908B1 (fr) * 1988-04-12 1993-05-14 Thomson Brandt Armements Dispositif de freinage aerodynamique d'un corps
FR2636419B1 (fr) * 1988-09-09 1993-10-01 Thomson Brandt Armements Projectile de neutralisation de zone, notamment d'aerodrome
DE3909902A1 (de) * 1989-03-25 1990-09-27 Diehl Gmbh & Co Am boden eines submunitionen enthaltenden traegerprojektils befestigtes bremstuch
FR2660908B1 (fr) * 1990-04-13 1994-09-09 Dassault Avions Dispositif de freinage aerodynamique.
DE4120027C2 (de) * 1991-06-18 1996-08-01 Rheinmetall Ind Gmbh Bremselement
DE4120339C2 (de) * 1991-06-20 1996-08-08 Rheinmetall Ind Gmbh Verpackung für ein entfaltbares Bremselement eines Flugkörpers
DE4124658C2 (de) * 1991-07-25 1996-08-14 Rheinmetall Ind Gmbh Einrichtung zum Abbau der Drehzahl von Submunition
FR2739682B1 (fr) * 1995-10-06 1997-12-05 Giat Ind Sa Perfectionnement apporte a un systeme de freinage aerodynamique d'une sous-munition ejectee d'un obus cargo en etant animee d'un mouvement de rotation
US6021716A (en) * 1997-07-18 2000-02-08 Lockheed Martin Corporation Penetrator having multiple impact segments
US5988071A (en) * 1997-08-21 1999-11-23 Lockheed Martin Corporation Penetrator having multiple impact segments, including an explosive segment
DE50312805D1 (de) * 2002-09-13 2010-07-22 Diehl Bgt Defence Gmbh & Co Kg Bremseinrichtung für ein bahnkorrigierbares drallstabilisiertes artillerieprojektil
US9174738B1 (en) * 2013-04-14 2015-11-03 Google Inc. Drag disk, small

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1890962A (en) * 1930-07-26 1932-12-13 Wiley Samuel Parachute for illuminating flares
US3047259A (en) * 1959-11-25 1962-07-31 George J Tatnall Speed brake retarding mechanism for an air-dropped store
US3114315A (en) * 1961-09-26 1963-12-17 William E Trump Dive brake
US3228634A (en) * 1963-07-18 1966-01-11 Chakoian George Air-drag apparatus for missiles
US3350040A (en) * 1965-09-10 1967-10-31 Leland W Sims High speed deceleration device
US3710715A (en) * 1970-11-24 1973-01-16 Us Army Volute spring stabilizer
US4005655A (en) * 1976-02-02 1977-02-01 The United States Of America As Represented By The Secretary Of The Navy Inflatable stabilizer/retarder
US4215836A (en) * 1978-10-30 1980-08-05 The United States Of America As Represented By The Secretary Of The Army Inflatable decelerator
DE3127071C2 (de) * 1981-07-09 1985-06-27 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Abwurfkörper
US4565341A (en) * 1981-09-24 1986-01-21 Zacharin Alexey T Inflatable decelerator
DE3228461C2 (de) * 1982-07-30 1984-06-07 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Endphasengelenkter Abwurfkörper
DE3608107C1 (de) * 1986-03-12 1987-10-01 Diehl Gmbh & Co Traegerprojektil fuer Submunition
DE3608109A1 (de) * 1986-03-12 1987-09-17 Diehl Gmbh & Co Bremseinrichtung fuer ein drallstabilisiertes projektil
US4649826A (en) * 1986-03-13 1987-03-17 Morton Thiokol Inc. Retardation system for air launched flares and submunitions
FR2595810B1 (fr) * 1986-03-14 1990-10-12 Serat Perfectionnements apportes aux munitions a sous-munitions pour attaque de zone

Also Published As

Publication number Publication date
IL84794A0 (en) 1988-05-31
JPS63172899A (ja) 1988-07-16
DE3643294A1 (de) 1988-06-23
DE3643294C2 (fr) 1988-10-06
US4860660A (en) 1989-08-29
EP0274579A1 (fr) 1988-07-20
IL84794A (en) 1992-03-29
ATE52611T1 (de) 1990-05-15
DE3762687D1 (de) 1990-06-13

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