EP2742312A1 - Structuration de la surface de l'ogive d'un projectile - Google Patents

Structuration de la surface de l'ogive d'un projectile

Info

Publication number
EP2742312A1
EP2742312A1 EP12746085.5A EP12746085A EP2742312A1 EP 2742312 A1 EP2742312 A1 EP 2742312A1 EP 12746085 A EP12746085 A EP 12746085A EP 2742312 A1 EP2742312 A1 EP 2742312A1
Authority
EP
European Patent Office
Prior art keywords
projectile
recesses
ogive
depressions
circle
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
EP12746085.5A
Other languages
German (de)
English (en)
Other versions
EP2742312B1 (fr
Inventor
Hannes DIKHOFF
Karlheinz MUSS
Vasile PAPET
Frank MÖNIUS
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.)
RWS GmbH
Original Assignee
RUAG Ammotec 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 RUAG Ammotec GmbH filed Critical RUAG Ammotec GmbH
Publication of EP2742312A1 publication Critical patent/EP2742312A1/fr
Application granted granted Critical
Publication of EP2742312B1 publication Critical patent/EP2742312B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • 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
    • F42B10/42—Streamlined projectiles

Definitions

  • the invention relates to a projectile with a projecting in the direction of the front projectile nose, which merges via an ogive in a rear cylindrical portion.
  • Caliber .22 Ir cartridges currently have, without exception, a bullet with an ogive whose surface is smooth. About the shape of the Ogive is trying to improve the flight characteristics of the projectile.
  • the invention has for its object to develop a projectile according to the preamble of claim 1, which has a lower air resistance and an optimized precision.
  • this object is achieved in that the surface of the ogive is structured. It has surprisingly been found that even slight structuring of the surface reduces both the aerodynamic drag and the precision of the projectile.
  • the surface has recesses. Wells can be easily introduced.
  • the depressions have a teardrop shape. Due to the special drop shape of the depressions on the ogive, the air resistance of the projectile is positively changed. This leads to a stretched and more uniform trajectory and thus improved precision.
  • the depressions are arranged on circles which comprise the ogive and which are arranged perpendicular to the longitudinal axis of the projectile, wherein preferably the recesses are arranged on the circles abutting one another.
  • the pits are then arranged so that the resulting swirls add and subtract, thereby achieving an optimum drag coefficient C w .
  • circumferential grooves are arranged below the recesses in the direction away from the projectile tip on the cylindrical region, which run parallel to the circles.
  • the grooves located in the cylindrical area have the task of optimally directing the air flow generated by the drop-shaped depressions around the projectile.
  • the bullet is thus also significantly less sensitive to weather conditions such as wind and rain / snow.
  • the surface of the projectile nose is smooth and below the depressions in the direction away from the projectile nose to the grooves a calming zone is arranged whose surface is smooth. Turbulences occur in these areas. Due to their smooth surfaces, a calming of the air flow takes place. Preference is given to the use of the projectile according to the invention for .22 Ir caliber cartridges, in particular for rimfire cartridges.
  • FIG. 1 shows a projectile according to the invention with a projectile nose 9, which merges via an ogive 1 into a cylindrical region 7.
  • depressions 2 are arranged as structuring.
  • These recesses 2 have a teardrop shape such that the largest diameter 5 in the lower half of the teardrop shape, i. away from the projectile nose 9 is arranged. Starting from the tip of the drop, which points in the direction of the projectile nose 9, the diameter of the drop shape steadily increases to the largest diameter 5 and then steadily decreases again.
  • These depressions 2 are arranged on circles 4a, 4b, 4c, 4d (see FIGS. 2a and 2b), which comprise the ogive 1 and which are arranged perpendicular to the longitudinal axis 3 of the projectile.
  • the recesses 2 are arranged abutting one another in the embodiment shown here.
  • the recesses 2 are arranged on a circle 4b offset to the recesses 2 on an adjacent circle 4a or 4c, so that a recess 2 on a circle 4a, 4b, 4c, 4d between two recesses 2 on an adjacent circle 4a, 4b, 4c, 4d is arranged.
  • the recesses 2 on a circle 4a, 4b, 4c, 4d to the recesses 2 on the adjacent circle 4a, 4b, 4c, 4d offset by half of the diameter 5 (see Figure 2b) of a recess 2 arranged.
  • diameter 5 of the recess 2 the width of the recess 2 on the surface is meant.
  • Figure 2a shows schematically the circles 4a, 4b, 4c, 4d on the ogive 1, on which the recesses 2 are arranged. It is good to see that the wells 2 up a circle 4a, 4b, 4c, 4d are arranged offset radially to the recesses 2 on the adjacent circle 4a, 4b, 4c, 4d.
  • the depressions 2 of Figure 2a are formed drop-shaped. Underneath the depressions 2 in the direction away from the projectile nose 9, grooves 8 are arranged on the cylindrical region 7 and run parallel to the circles 4a, 4b, 4c, 4d.
  • the recesses 2 are arranged so that the resulting turbulences add and subtract, thus achieving an optimum C w value.
  • the grooves 8 located in the cylindrical region 7 are designed so that they optimally direct the air flow generated by the drop-shaped depressions 2 around the projectile. The bullet is thus also significantly less sensitive to weather conditions such as wind and rain / snow.
  • the area in which the turbulences are located is defined so that the projectile nose 9 is smooth, ie has no depressions and also between the depressions 2 and the grooves 8 is a calming zone 10, whose surface is smooth and which contributes to calm the air flow ,

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Toys (AREA)
  • Building Environments (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

L'invention concerne un projectile pourvu d'une pointe (9) avant dans la direction de tir qui se transforme par l'intermédiaire d'une ogive (1) en une zone arrière cylindrique (7). Pour réduire la résistance à l'air et optimiser la précision, selon l'invention, la surface de l'ogive (1) est structurée.
EP12746085.5A 2011-08-08 2012-08-07 Structuration de la surface de l'ogive d'un projectile Active EP2742312B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011109666 2011-08-08
PCT/EP2012/065435 WO2013020976A1 (fr) 2011-08-08 2012-08-07 Structuration de la surface de l'ogive d'un projectile

Publications (2)

Publication Number Publication Date
EP2742312A1 true EP2742312A1 (fr) 2014-06-18
EP2742312B1 EP2742312B1 (fr) 2016-03-23

Family

ID=46650541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12746085.5A Active EP2742312B1 (fr) 2011-08-08 2012-08-07 Structuration de la surface de l'ogive d'un projectile

Country Status (5)

Country Link
US (1) US9488453B2 (fr)
EP (1) EP2742312B1 (fr)
DE (1) DE102012015476A1 (fr)
RU (1) RU2615582C2 (fr)
WO (1) WO2013020976A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10330448B2 (en) 2015-12-16 2019-06-25 Ruag Ammotec Ag Fragmentation projectile and method for its manufacturing
EP3645963A4 (fr) 2017-06-26 2021-03-24 Superior Shooting Systems, Inc. (TX Corp.) Projectile amélioré, cartouche et procédé pour créer une munition de fusil de précision
EP3470769A1 (fr) * 2017-10-16 2019-04-17 Next Generation Tactical, LLC Projectile d'armes de petite taille
US10989507B2 (en) 2019-01-29 2021-04-27 Mark Thompson Systems and methods for matching ogive twist and barrel twist

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US1099298A (en) * 1914-02-24 1914-06-09 Union Metallic Cartridge Co Mushroom-bullet.
US1181849A (en) * 1915-10-19 1916-05-02 George F Coomber Projectile.
SU117431A1 (ru) * 1958-03-17 1958-11-30 В.Л. Чернопятов Универсальное двухствольное охотничье ружье
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US4063512A (en) * 1966-10-05 1977-12-20 The United States Of America As Represented By The Secretary Of The Air Force Armor penetrating projectile
US4173930A (en) * 1977-10-25 1979-11-13 Faires C Dickson Jr Dimpled shotgun pellets
US5164538A (en) * 1986-02-18 1992-11-17 Twenty-First Century Research Institute Projectile having plural rotatable sections with aerodynamic air foil surfaces
US4996924A (en) * 1987-08-11 1991-03-05 Mcclain Harry T Aerodynamic air foil surfaces for in-flight control for projectiles
US4718348A (en) * 1986-05-16 1988-01-12 Ferrigno John E Grooved projectiles
US4702170A (en) * 1986-10-14 1987-10-27 Trudeau Ronald E Shotshell cartridge adapter
DE3731569A1 (de) * 1987-09-19 1989-04-06 Rheinmetall Gmbh Manoeverpatrone
US5264538A (en) * 1989-08-14 1993-11-23 The Dow Chemical Company Cyclic poly(aryl ether) oligomers
US5385100A (en) * 1991-04-02 1995-01-31 Olin Corporation Upset jacketed bullet
US5208424A (en) * 1991-04-02 1993-05-04 Olin Corporation Full metal jacket hollow point bullet
US5378524A (en) * 1991-05-28 1995-01-03 Blood; Charles L. Friction reducing surface and devices employing such surfaces
US5200573A (en) * 1991-05-28 1993-04-06 Blood Charles L Projectile having a matrix of cavities on its surface
US5356150A (en) * 1993-07-14 1994-10-18 Lisco, Inc. Golf ball
US5890975A (en) * 1997-06-05 1999-04-06 Lisco, Inc. Golf ball and method of forming dimples thereon
GB0002767D0 (en) * 2000-02-08 2000-03-29 Lambeth Pty Ltd Improvements in and relating to training ammunition
AT411935B (de) * 2001-09-19 2004-07-26 Oregon Ets Patentverwertung Geschosshaube
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Also Published As

Publication number Publication date
RU2615582C2 (ru) 2017-04-05
DE102012015476A1 (de) 2013-02-14
RU2014108482A (ru) 2015-09-20
US20140318405A1 (en) 2014-10-30
WO2013020976A1 (fr) 2013-02-14
US9488453B2 (en) 2016-11-08
EP2742312B1 (fr) 2016-03-23

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