US3771458A - Sabot projectile - Google Patents

Sabot projectile Download PDF

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Publication number
US3771458A
US3771458A US00213284A US3771458DA US3771458A US 3771458 A US3771458 A US 3771458A US 00213284 A US00213284 A US 00213284A US 3771458D A US3771458D A US 3771458DA US 3771458 A US3771458 A US 3771458A
Authority
US
United States
Prior art keywords
core
projectile
sabot
groove
spring assembly
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
US00213284A
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English (en)
Inventor
O Schweimler
A Kiehn
B Sauter
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.)
IND WERKE KARLSRUKE AUGSBURG A
INDUSTRIE WERKE KARLSRUKE AUGSBURG AG DT
Original Assignee
IND WERKE KARLSRUKE AUGSBURG A
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
Priority claimed from DE19712131084 external-priority patent/DE2131084C3/de
Application filed by IND WERKE KARLSRUKE AUGSBURG A filed Critical IND WERKE KARLSRUKE AUGSBURG A
Application granted granted Critical
Publication of US3771458A publication Critical patent/US3771458A/en
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

  • annular groove on the rear end of the core of the projectile engages tensionally an annular groove in the inner wall of the when the last named annular groove having a cross section which is much larger than the cross section of the annular helical spring and an inner diameter which is greater than the outer diameter of the annular helical spring.
  • the invention relates to an undercalibrated projectile comprising a core provided with a cap from which the rear end of the core may extend outwardly and into a sabot which is connected in axial direction with the core in such a manner that the coupling between the core and the sabot is automatically released upon firing in response to the rotative speed and the centrifugal effect of the core.
  • the core of such a known projectile is arranged in a lightweight projectile part, namely, in the so-called sabot.
  • a lightweight projectile part namely, in the so-called sabot.
  • the sabot may be provided with guide rings.
  • Such guide rings engage the rifling and effect a sealing of the gas in the gun barrel.
  • the outer diameter of the guide rings corresponds to the diameter or the caliber of the gun barrel.
  • Projectiles provided with sabots and guide rings are well known, and particular attention is called to the guns K-5 (28 centimeter caliber) and Kl 2 Q ceptimeter caliber) which use this type of projectiles. These projectiles have been very successful, particularly in their range which is about 150 km.
  • the rear end of the projectile is provided with a ring-shaped projection which is used for receiving a spring ring having a substantially rectangular cross section.
  • This spring ring is secured within the sabot in axial direction by means of a threaded sleeve, and the threaded sleeve itself is secured in radial direction by a threaded pin.
  • a grenade with an undercalibrated core has faults and disadvantages similar to the ones mentioned in the foregoing.
  • the faults are that the core of the grenade is provided with a cap whose point, compared with its cylindrical portion, has a disproportionately thick wall so that it is very likely and possible that the cap at the point of the grenade does not tear open when the core is accelerated so that in an undesirable manner the cap is propelled with the core to the target.
  • the previously employed connection of the cap with the core at its rear end has several constructural faults.
  • the rear end of the core has, com pared to the outer diameter of the core, an extremely small annular recess for the reception of a spring ring having a flattened out rectangular cross section.
  • the spring ring has a very insufficient amount of mass so that, again, a secure opening and a uniform engagement of the spring ring in the interior of the cap does not produce an excess of centrifugal force which would give the projectile the required twist for passing through the rifling of the gun barrel.
  • the coupling between the projectile and the sabot comprises substantially a ring-shaped spring element having a large mass, so that, on the one hand, an end portion of the core of the projectile engages closely the spring element, while on the other hand, the ring-shaped spring element engages tensionally an annular groove in the interior of the sabot, whereby the diameter of this annular groove is larger than the outer diameter of the spring element; and the sabot extends into the interior of the cap.
  • the ring-spring element comprises a helical tension spring which increases the mass of the coupling means and that in the interior of this helical tension spring is arranged a core comprising a spring ring which biases the helical tension spring to the core of the projectile and assures an axial, symmetrical form of the same.
  • the inner diameter of the ring-shaped spring element is brought into locking engagement with an annular groove provided at the rear end of the projectile.
  • the invention is further distinguished by the fact that the annular groove in the sabot, which receives the ring-shaped element, has a diameter which is at least about the diameter of the cross-section of said spring element greater than the outer diameter of the ringshaped spring element.
  • the sabot projectile of the invention has an extremely simple construction.
  • the employed individual parts are very few in number and are suitable for mass production which requires very little skill, particularly as far as fittings, tolerances, or the like are concerned.
  • the coupling In its rest position the coupling possesses a very high resistance to shear in axial direction while, on the other hand, the coupling under the influence of centrifugal forces which occur during firing, possesses in radial direction a very high elasticity and yieldability.
  • the mass of the combined spring elements is relatively great, so that also a very reliable opening of the same and at the same time an engagement with the annular groove in the sabot is obtained in view of a sufficient excess of centrifugal force.
  • the combination of the mentioned spring elements of the invention permits the use of relatively large dimensions, so that, on the one hand a transfer of the mass forces of the core to the sabot and on the other hand, the assembly of the parts in a mass production procedure is very favorable.
  • Another advantage of the invention resides in the employment of the coupling element not only in the sabot but also in the core of the projectile, so that tensions are created in the notches on the core and that the shape of the annular grooves tends to be zero and are, therefore, harmless.
  • FIG. 1 illustrates in an axially sectional view a sabot projectile in accordance with the invention.
  • FIG. 2 illustrates a portion of the coupling member comprising in combination an annular helical tension spring having arranged therein as a core a spring ring.
  • FIG. 3 illustrates on an enlarged scale the coupling core on the projectile with the sabot.
  • the projectile core 2 has mounted thereon a cap 1 provided with a number of circunferentially distributed axially extending groovelike notches la.
  • This cap 1 is made of a plastic such as nylon, and is used as is customary in projectiles of this type. for resisting the mechanical stresses such as they occur prior to the firing of the projectile, during manipulation of the projectiles when they are transported or dropped with their points to the ground, and for resisting other stresses occasioned when bringing the gun into condition for firing, such as during the insertion of the projectile into the cartridge chamber.
  • the cap 1 also is subjected to mechanical stresses when the gun is fired.
  • the cap 1 After the sabot projectile has left the barrel of the gun the cap 1 is destroyed under the action of centrifugal force in that the cap is torn open from the center portion thereof. After this has happened, the undercalibrated projectile core 2, from which the cap has been removed, after having left the gun barrel, performs its outer ballistic flight path alone toward the target.
  • the sabot 3 is attached in axial direction to the projectile core 2 in the cap 1.
  • the sabot 3 has in its rear face an axial recess 30, serving on the one hand for the purpose of reducing the weight, and on the other hand serving to facilitate the passage of the ignition ray to a fluorescent substance, powder train or the like.
  • the outer circumference of the sabot has mounted thereon a guide ring 4, which is intended to come into engagement with the rifling of the not illustrated gun barrel. This guide ring 4 also seals against the expanding propelling charge.
  • the rear end 2a of the projectile core is provided with an annular groove 2b which serves for the reception of a spring element having a great mass, and is designated in its entirety by 5.
  • the spring element 5 is coupled tensionally with an annular groove 3b provided in the interior of the sabot 3.
  • the annular groove 3b has a diameter which is at least about the di ameter of the cross section of the spring element greater than the outer diameter of the ring-shaped element 5.
  • the coupling or spring element 5 comprises a helical tension spring 50 having an outer diameter (D) and an inner diameter (d) as illustrated in FIG. 2.
  • a spring ring 5b serving as a core of the tension spring 5a.
  • annular spring assembly comprises a tension coil spring of great mass, and a spring clamping ring within said coil spring adapted to supply the required pre-stress of said annular spring assembly.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Springs (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US00213284A 1971-06-23 1971-12-29 Sabot projectile Expired - Lifetime US3771458A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712131084 DE2131084C3 (de) 1971-06-23 TreibsplegelgeschoB

Publications (1)

Publication Number Publication Date
US3771458A true US3771458A (en) 1973-11-13

Family

ID=5811535

Family Applications (1)

Application Number Title Priority Date Filing Date
US00213284A Expired - Lifetime US3771458A (en) 1971-06-23 1971-12-29 Sabot projectile

Country Status (8)

Country Link
US (1) US3771458A (xx)
BE (1) BE775656A (xx)
CH (1) CH529328A (xx)
FR (1) FR2142897B1 (xx)
GB (1) GB1340238A (xx)
NL (1) NL148700B (xx)
NO (1) NO130916C (xx)
SE (1) SE396816B (xx)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948184A (en) * 1972-10-10 1976-04-06 Etat Francais Sub-calibre projectile shells
US4142467A (en) * 1976-07-09 1979-03-06 Dynamit Nobel Aktiengesellschaft Projectile with sabot
JPS54156400A (en) * 1978-05-30 1979-12-10 Oerlikon Buehrle Ag Gunnloading cylinder projectile that is used for conquering multiphase resistance and its revolution is stable
US4467724A (en) * 1982-08-30 1984-08-28 Olin Corporation Sabot projectile core restraint
US4505204A (en) * 1982-05-28 1985-03-19 Aktiebolaget Bofors Drive element for a sub-calibre projectile
US4653404A (en) * 1984-03-01 1987-03-31 Olin Corporation High velocity notched ammunition sabot
US4735147A (en) * 1984-03-01 1988-04-05 Olin Corporation Ammunition sabot and projectile
US4759293A (en) * 1986-06-30 1988-07-26 Davis Jr Thomas O Article using shape-memory alloy to improve and/or control the speed of recovery
US4839479A (en) * 1986-06-30 1989-06-13 Davis Jr Thomas O Article using shape-memory alloy to improve and/or control the speed of recovery
US4939997A (en) * 1988-09-29 1990-07-10 Mauser-Werke Oberndorf Gmbh Article of ammunition
US4982669A (en) * 1988-02-04 1991-01-08 Rheinmetall Gmbh Subcaliber discarding sabot projectile
US5014624A (en) * 1986-12-24 1991-05-14 Royal Ordnance Plc Discarding sabots
US5175389A (en) * 1992-01-07 1992-12-29 Federal-Hoffman, Inc. D/B/A Federal Cartridge Co. Frontally guided sabot bullet
US5182419A (en) * 1978-05-26 1993-01-26 Asi Systems International Saboted projectile
US5323708A (en) * 1993-03-29 1994-06-28 Aerojet-General Corporation Clip-lock sabot cap
US20050081734A1 (en) * 2003-10-17 2005-04-21 Sharplin William J. Grenade
US20120175457A1 (en) * 2009-09-25 2012-07-12 John William Hunter Vehicle for launching from a gas gun
US9567107B2 (en) 2009-09-25 2017-02-14 Quicklaunch, Inc. Gas gun launcher
US9719952B1 (en) * 2014-10-23 2017-08-01 William G Gensler Method for measuring the amount of extracellular fluid surrounding a surface disposed within a plant and the ionic population and identity of the dominant ion in that fluid
US10427804B1 (en) 2016-04-29 2019-10-01 Quicklaunch, Inc. Orbital mechanics of impulsive launch
US11267588B2 (en) 2016-04-29 2022-03-08 Quicklaunch, Inc. Orbital mechanics of impulsive launch
US20220252382A1 (en) * 2019-04-26 2022-08-11 University Of Kansas Maneuvering aeromechanically stable sabot system
US20230116071A1 (en) * 2020-06-15 2023-04-13 Rheinmetall Waffe Munition Gmbh Sabot

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH660783A5 (de) * 1982-07-02 1987-06-15 Honeywell Inc Geschoss und verfahren zu seiner herstellung.
DE3243430A1 (de) * 1982-11-24 1984-05-24 Mauser-Werke Oberndorf Gmbh, 7238 Oberndorf Geschoss mit einem rohrfoermigen koerper
DE4116191A1 (de) * 1991-05-17 1992-11-19 Rheinmetall Gmbh Submunition fuer ein drallstabilisiertes traegergeschoss

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2715873A (en) * 1950-01-25 1955-08-23 Parke H Thompson Fuze
US3498222A (en) * 1967-11-03 1970-03-03 Brevets Aero Mecaniques Ammunition having a subcalibre shell comprising a front cap and means for destroying this cap in flight
US3507221A (en) * 1966-07-21 1970-04-21 Brevets Aero Mecaniques Armor piercing,sabot shells

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2715873A (en) * 1950-01-25 1955-08-23 Parke H Thompson Fuze
US3507221A (en) * 1966-07-21 1970-04-21 Brevets Aero Mecaniques Armor piercing,sabot shells
US3498222A (en) * 1967-11-03 1970-03-03 Brevets Aero Mecaniques Ammunition having a subcalibre shell comprising a front cap and means for destroying this cap in flight

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948184A (en) * 1972-10-10 1976-04-06 Etat Francais Sub-calibre projectile shells
US4142467A (en) * 1976-07-09 1979-03-06 Dynamit Nobel Aktiengesellschaft Projectile with sabot
US5182419A (en) * 1978-05-26 1993-01-26 Asi Systems International Saboted projectile
JPS54156400A (en) * 1978-05-30 1979-12-10 Oerlikon Buehrle Ag Gunnloading cylinder projectile that is used for conquering multiphase resistance and its revolution is stable
JPS6158760B2 (xx) * 1978-05-30 1986-12-12 Uerukutsuoiku Mas Fab Eerikon Byuure Ag
US4505204A (en) * 1982-05-28 1985-03-19 Aktiebolaget Bofors Drive element for a sub-calibre projectile
US4467724A (en) * 1982-08-30 1984-08-28 Olin Corporation Sabot projectile core restraint
US4735147A (en) * 1984-03-01 1988-04-05 Olin Corporation Ammunition sabot and projectile
US4653404A (en) * 1984-03-01 1987-03-31 Olin Corporation High velocity notched ammunition sabot
US4759293A (en) * 1986-06-30 1988-07-26 Davis Jr Thomas O Article using shape-memory alloy to improve and/or control the speed of recovery
US4839479A (en) * 1986-06-30 1989-06-13 Davis Jr Thomas O Article using shape-memory alloy to improve and/or control the speed of recovery
US5014624A (en) * 1986-12-24 1991-05-14 Royal Ordnance Plc Discarding sabots
US4982669A (en) * 1988-02-04 1991-01-08 Rheinmetall Gmbh Subcaliber discarding sabot projectile
US4939997A (en) * 1988-09-29 1990-07-10 Mauser-Werke Oberndorf Gmbh Article of ammunition
US5175389A (en) * 1992-01-07 1992-12-29 Federal-Hoffman, Inc. D/B/A Federal Cartridge Co. Frontally guided sabot bullet
US5323708A (en) * 1993-03-29 1994-06-28 Aerojet-General Corporation Clip-lock sabot cap
US20050081734A1 (en) * 2003-10-17 2005-04-21 Sharplin William J. Grenade
US8536502B2 (en) * 2009-09-25 2013-09-17 Quicklaunch, Inc. Vehicle for launching from a gas gun
US20120175457A1 (en) * 2009-09-25 2012-07-12 John William Hunter Vehicle for launching from a gas gun
US8664576B2 (en) * 2009-09-25 2014-03-04 Quicklaunch, Inc. Vehicle for launching from a gas gun
US8979033B2 (en) 2009-09-25 2015-03-17 Quicklaunch, Inc. Gas gun launcher
US9567108B2 (en) 2009-09-25 2017-02-14 Quicklaunch, Inc. Gas gun launcher
US9567107B2 (en) 2009-09-25 2017-02-14 Quicklaunch, Inc. Gas gun launcher
US9719952B1 (en) * 2014-10-23 2017-08-01 William G Gensler Method for measuring the amount of extracellular fluid surrounding a surface disposed within a plant and the ionic population and identity of the dominant ion in that fluid
US10427804B1 (en) 2016-04-29 2019-10-01 Quicklaunch, Inc. Orbital mechanics of impulsive launch
US11267588B2 (en) 2016-04-29 2022-03-08 Quicklaunch, Inc. Orbital mechanics of impulsive launch
US20220252382A1 (en) * 2019-04-26 2022-08-11 University Of Kansas Maneuvering aeromechanically stable sabot system
US11852447B2 (en) * 2019-04-26 2023-12-26 The University Of Kansas Maneuvering aeromechanically stable sabot system
US20230116071A1 (en) * 2020-06-15 2023-04-13 Rheinmetall Waffe Munition Gmbh Sabot

Also Published As

Publication number Publication date
NO130916C (xx) 1975-03-05
SE396816B (sv) 1977-10-03
NO130916B (xx) 1974-11-25
NL148700B (nl) 1976-02-16
BE775656A (fr) 1972-03-16
DE2131084B2 (de) 1976-08-19
CH529328A (de) 1972-10-15
DE2131084A1 (de) 1972-12-28
FR2142897B1 (xx) 1973-07-13
FR2142897A1 (xx) 1973-02-02
NL7207730A (xx) 1972-12-28
GB1340238A (en) 1973-12-12

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