EP0752571A1 - Kurzbahngeschoss - Google Patents

Kurzbahngeschoss Download PDF

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Publication number
EP0752571A1
EP0752571A1 EP96401341A EP96401341A EP0752571A1 EP 0752571 A1 EP0752571 A1 EP 0752571A1 EP 96401341 A EP96401341 A EP 96401341A EP 96401341 A EP96401341 A EP 96401341A EP 0752571 A1 EP0752571 A1 EP 0752571A1
Authority
EP
European Patent Office
Prior art keywords
projectile
rear part
plastic material
front part
projectile according
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
EP96401341A
Other languages
English (en)
French (fr)
Other versions
EP0752571B1 (de
Inventor
Pierre Lalanne
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.)
Giat Industries SA
Original Assignee
Giat Industries SA
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 Giat Industries SA filed Critical Giat Industries SA
Publication of EP0752571A1 publication Critical patent/EP0752571A1/de
Application granted granted Critical
Publication of EP0752571B1 publication Critical patent/EP0752571B1/de
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
    • F42B8/00—Practice or training ammunition
    • F42B8/12—Projectiles or missiles
    • F42B8/14—Projectiles or missiles disintegrating in flight or upon impact

Definitions

  • the technical field of the invention is that of projectiles having a shortened trajectory and in particular that of exercise projectiles.
  • This document describes a projectile which comprises a front part intended to have a ballistic trajectory, which makes it possible to carry out a shooting on target.
  • the mass of the front part is however much less than that of a normal projectile. This results in a shortened ballistic trajectory which allows a safe shooting on areas of ground with reduced dimensions.
  • This projectile also has a rear part which disintegrates, when fired, at the exit of the barrel of the weapon.
  • the rear part has a jacket filled with compressed metal powder.
  • the mechanical characteristics of the metal powder loading are liable to change during storage.
  • the powder can agglomerate and resist further bursting, thus modifying the conditions of separation of the front and rear parts and the performance of the projectile from the point of view of the shooting accuracy.
  • the projectile according to the invention is simple in design and inexpensive to manufacture. It has front and rear parts which separate in a reliable and reproducible way at the exit of the barrel of the weapon without causing wear to the barrel of the projectile, nor spreading metal powder dangerous for the shooter.
  • the projectile proposed by the invention is easily adaptable to any caliber of weapon and it ensures in all cases a precise and reproducible ballistic trajectory, thus allowing an exercise in shooting in conditions close to shooting with war projectiles.
  • the subject of the invention is a projectile with a shortened trajectory comprising a front part intended to have a ballistic trajectory and a rear part which disintegrates during shooting, projectile characterized in that the rear part at least is made of a plastic material and the front and rear parts each have an external profile to the caliber of the weapon, profile which is intended to take the scratches from the weapon.
  • the rotational drive provides reproducible external ballistics for the front part (thanks to gyrostabilization) and it facilitates the separation between the front and rear parts, which reduces the disturbances caused by the rear part on the front part.
  • the front part and the rear part are made of the same plastic material and form a single-piece body, the front part being separated from the rear part by an annular rupture initiator.
  • the projectile body is made of a fragile plastic material capable of bursting under the action of centrifugal forces developed during firing, the front part being surrounded by a jacket of sufficient thickness to prevent its bursting.
  • the shirt can be made of a plastic material such as Polyamide, it could also be made of brass.
  • the front part and the rear part of the projectile are made of different plastic materials, the plastic material constituting the rear part being a fragile material capable of bursting under the action of centrifugal forces developed during firing. .
  • the rear part may be extended by a stud which enters a housing in the front part and ensures the connection of these two parts.
  • a fragile plastic containing a metallic powder will be used as the fragile plastic material.
  • the rear part of the projectile carries at least one initiator of longitudinal rupture.
  • a projectile 1 is shown fixed by a crimp 3 to a front part of a socket 2.
  • the projectile has a front part 4 and a rear part 5 which are separated from one other by a groove 6.
  • the maximum diameter ( ⁇ 1) of the front part 4 is substantially equal to that ( ⁇ 2) of the rear part 5, these two parts being of the caliber of the weapon.
  • the front 4 and rear 5 parts have an external profile such that they both take up the scratches on the barrel of the weapon when fired.
  • the groove 6 constitutes a rupture initiation which separates the front part 4 from the rear part 5. It also receives the annular crimping 3 of the sleeve and makes it possible to secure the connection of the projectile with the sleeve.
  • the rear part 5 of the projectile 1 also includes incipient fractures 7 which extend longitudinally from the groove 6 to the rear of the projectile. These incipient ruptures are produced in the form of grooves regularly distributed angularly (see also FIG. 1b).
  • the body of the projectile 1 is preferably made of a plastic material loaded with metal particles, for example plastic loaded with bronze or tungsten. Materials which can be used to make the projectile are described for example by patents FR2528564 and FR9205796.
  • the projectile will be given a volume such that its mass is substantially that of a war bullet.
  • the recoil obtained during the shooting is of the same order as for a real shooting and the mechanisms of the weapon can use this recoil to ensure the various desired armaments.
  • the metallic particles can be chosen from the following materials: bronze, copper, lead, tungsten.
  • the diameter of the metal particles will be between 0.04 and 0.1 mm.
  • Additives may be added to this material, for example a solid lubricant such as molybdenum disulphide, which makes it possible to reduce the friction between the projectile and the barrel of the weapon during the firing which reduces the wear of the tube.
  • a solid lubricant such as molybdenum disulphide
  • an anti-shock additive such as an acrylic resin such as styrene butadiene methacrylate
  • an acrylic resin such as styrene butadiene methacrylate
  • the breaking point 6 is placed so that the mass of the front part is different from that of the rear part (and preferably less than that of the rear part). This results in an acceleration differential between the two parts which causes a torsional shear at the level of the breaking point 6.
  • the axial acceleration of the projectile increases the stresses undergone by its reduced section at the level of the initiation of rupture 6 and also promotes the separation of the two parts of the projectile.
  • the front and rear parts separate from each other at the exit of the gun barrel (or even inside the barrel).
  • the front part pursues a ballistic trajectory which is shortened compared to that of a complete projectile due to its reduced mass.
  • the rear part 5 bursts at the outlet of the barrel of the weapon thanks to the presence of the longitudinal breaking primers 7 which weaken it.
  • the advantage of this first embodiment is that it allows the projectile to be produced by a single molding or injection operation (one-piece projectile).
  • the rear part primers for ruptures 7 which are more or less deep and / or more or less numerous. The aim being to ensure the bursting of the rear part 5 at the outlet of the barrel while the front part remains intact.
  • FIG. 2 shows a second embodiment of the projectile 1 according to the invention.
  • the front part 4 comprises a core 8 of fragile plastic material (plastic material loaded with metallic powder) which is covered with a jacket 9 of resistant material.
  • the core 8 forms a single piece with the rear part 5 of the projectile and thus constitutes a projectile body the front part of which is covered by the jacket.
  • the external diameters ⁇ 1 and ⁇ 2 of the front and rear parts are again chosen so as to take both the scratches of the weapon.
  • the front and rear parts are separated by a groove 6 which constitutes a starting point for rupture and also allows the projectile to be fixed on the sleeve 2 by crimping the latter.
  • the front and rear parts separate at the exit from the barrel of the weapon because of the rupture which occurs at the level of the groove 6.
  • This particular embodiment makes it possible to use a very fragile plastic material to produce the projectile, for example comprising a large metallic load (greater than 85%), while ensuring the mechanical strength of the front part (thanks to the jacket) .
  • the loaded material which constitutes the rear part 5 and the core 8 is very fragile, it is no longer necessary to arrange primers for longitudinal ruptures on the rear part 5, and it is even possible not to provide a groove 6.
  • the complete projectile can be produced by a single injection operation using an appropriate bi-injection mold of known type.
  • FIG. 3 shows a projectile 1 according to a third embodiment in which the front part 4 and the rear part 5 are each made of a different plastic material.
  • the rear part 5 is made of a fragile plastic material (plastic loaded with metal) and it is defined so as to be able to burst at the outlet of the barrel of the weapon by the effect of centrifugal forces.
  • the front part 4 is made of a more resistant plastic material, for example an uncharged polyamide, or less charged than the rear part.
  • the rear part 5 carries a frustoconical stud 10 which is placed in a corresponding housing 11 of the front part 4. This thus ensures the coaxiality of the front and rear parts.
  • the projectile can be produced in a single bi-injection mold. We can also realize the front and rear parts independently and then fix them by gluing.
  • the scratching in the weapon both by the front part and the rear part again ensures the reproducibility of the conditions of separation of the two parts and the precision of the ballistic trajectory of the front part.
  • the attachment to a socket can be carried out by gluing.
  • FIG. 4 represents another embodiment, derived from that of FIG. 3, and in which the front part 4 of the projectile 1 comprises a core 12 covered with a jacket 9.
  • the rear part is made of fragile plastic and it is linked to the front part by the cooperation of the stud 10 with the frustoconical housing 11.
  • This embodiment makes it possible to produce a front part of greater mass by combining a core 12 of very loaded (but very fragile) plastic material with a jacket ensuring the mechanical strength of the front part.
  • the shirt will preferably be made from an uncharged plastic, but the brass shirt could also be made.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Road Signs Or Road Markings (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Electroluminescent Light Sources (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Radar Systems Or Details Thereof (AREA)
EP96401341A 1995-07-07 1996-06-20 Kurzbahngeschoss Expired - Lifetime EP0752571B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9508247 1995-07-07
FR9508247A FR2736426B1 (fr) 1995-07-07 1995-07-07 Projectile a trajectoire raccourcie

Publications (2)

Publication Number Publication Date
EP0752571A1 true EP0752571A1 (de) 1997-01-08
EP0752571B1 EP0752571B1 (de) 2000-07-12

Family

ID=9480798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96401341A Expired - Lifetime EP0752571B1 (de) 1995-07-07 1996-06-20 Kurzbahngeschoss

Country Status (4)

Country Link
EP (1) EP0752571B1 (de)
AT (1) ATE194704T1 (de)
DE (1) DE69609251T2 (de)
FR (1) FR2736426B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989381A3 (de) * 1999-02-25 2000-04-12 Oerlikon Contraves Pyrotec AG Unterkalibergeschoss
WO2006086902A1 (de) * 2005-02-16 2006-08-24 Saltech Ag Geschoss
US9157713B1 (en) 2013-03-15 2015-10-13 Vista Outdoor Operations Llc Limited range rifle projectile

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170405A (en) * 1962-03-17 1965-02-23 Karlsruhe Augsburg Iweka Disintegrating training ammunition for firearms
FR2528564A1 (fr) * 1982-06-11 1983-12-16 Munitions Ste Fse Balle d'exercice a base de matiere plastique
EP0169171A1 (de) * 1984-07-17 1986-01-22 Schweizerische Eidgenossenschaft vertreten durch die Eidg. Munitionsfabrik Thun der Gruppe für Rüstungsdienste Geschoss für eine Übungsmunition mit einer Schussfeldbegrenzung sowie Verwendung des Geschosses
US5035183A (en) * 1990-03-12 1991-07-30 David Luxton Frangible nonlethal projectile
WO1993016349A1 (en) * 1992-02-07 1993-08-19 Snc Industrial Technologies Inc. Frangible practice ammunition
FR2691156A1 (fr) * 1992-05-13 1993-11-19 Sfm Defense Matière plastique de haute densité, notamment pour la réalisation de balles pour le tir d'exercice.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170405A (en) * 1962-03-17 1965-02-23 Karlsruhe Augsburg Iweka Disintegrating training ammunition for firearms
FR2528564A1 (fr) * 1982-06-11 1983-12-16 Munitions Ste Fse Balle d'exercice a base de matiere plastique
EP0096617A1 (de) * 1982-06-11 1983-12-21 Societe Francaise De Munitions (S.F.M.) Geschoss aus Kunststoff
EP0169171A1 (de) * 1984-07-17 1986-01-22 Schweizerische Eidgenossenschaft vertreten durch die Eidg. Munitionsfabrik Thun der Gruppe für Rüstungsdienste Geschoss für eine Übungsmunition mit einer Schussfeldbegrenzung sowie Verwendung des Geschosses
US5035183A (en) * 1990-03-12 1991-07-30 David Luxton Frangible nonlethal projectile
WO1993016349A1 (en) * 1992-02-07 1993-08-19 Snc Industrial Technologies Inc. Frangible practice ammunition
FR2691156A1 (fr) * 1992-05-13 1993-11-19 Sfm Defense Matière plastique de haute densité, notamment pour la réalisation de balles pour le tir d'exercice.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989381A3 (de) * 1999-02-25 2000-04-12 Oerlikon Contraves Pyrotec AG Unterkalibergeschoss
WO2006086902A1 (de) * 2005-02-16 2006-08-24 Saltech Ag Geschoss
US8117967B2 (en) 2005-02-16 2012-02-21 Saltech Ag Bullet
US9157713B1 (en) 2013-03-15 2015-10-13 Vista Outdoor Operations Llc Limited range rifle projectile

Also Published As

Publication number Publication date
EP0752571B1 (de) 2000-07-12
FR2736426B1 (fr) 1997-08-08
FR2736426A1 (fr) 1997-01-10
DE69609251T2 (de) 2001-01-04
DE69609251D1 (de) 2000-08-17
ATE194704T1 (de) 2000-07-15

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