US3447466A - Sabot projectile with core guiding means - Google Patents

Sabot projectile with core guiding means Download PDF

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Publication number
US3447466A
US3447466A US665324A US3447466DA US3447466A US 3447466 A US3447466 A US 3447466A US 665324 A US665324 A US 665324A US 3447466D A US3447466D A US 3447466DA US 3447466 A US3447466 A US 3447466A
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US
United States
Prior art keywords
core
sabot
subcalibre
projectile
drilling
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
US665324A
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English (en)
Inventor
Walter Engel
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.)
OC Oerlikon Corp AG Pfaeffikon
Original Assignee
Oerlikon Buehrle Holding AG
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Filing date
Publication date
Application filed by Oerlikon Buehrle Holding AG filed Critical Oerlikon Buehrle Holding AG
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Publication of US3447466A publication Critical patent/US3447466A/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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/065—Sulfides; Selenides; Tellurides
    • C10M2201/066—Molybdenum sulfide
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/286—Esters of polymerised unsaturated acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/101—Condensation polymers of aldehydes or ketones and phenols, e.g. Also polyoxyalkylene ether derivatives thereof

Definitions

  • This subcalibre core has a tail portion which is seperated from the centre section of the core by an annular groove, the tail portion being located within a spherical zone the radius of which is equal to the radius of the sabot drilling.
  • the tail portion has at least approximately the same diameter as the centre section of the subcalibre core, as a result of which canting and jamming of the subcalibre core on emerging from the sabot are obviated.
  • the present invention relates to a sabot projectile and in particular to a sabot projectile embodying a sabot with a drilling in which a subcalibre core is guided during emergence from the sabot.
  • the object of the invention is to produce a sabot projectile in which canting and jamming of the subcalibre core on exit from the sabot are obviated.
  • the invention has as a further object the production of a sabot projectile in which the emergence of the subcalibre core from the sabot is facilitated.
  • An additional object of the invention is the production of a sabot projectile in which the tail portion of the subcalibre core is so formed that complete exit of the subcalibre core from the sabot is assured.
  • FIG. 1 shows a longitudinal section through a first example of execution of the sabot projectile
  • FIG. 2 shows a view of the rearward portion of the subcalibre core in accordance with a second version of the execution of the sabot projectile
  • FIG. 3 shows a view of the rearward portion of the subcalibre core as it emerges from the sabot.
  • a sabot 1 encloses a subcalibre core 2.
  • the sabot 1 manufactured in the form of a sleeve of an aluminium alloy or some other light metal, has its rearward portion located in the conventional manner in the mouth of a cartridge case not illustrated.
  • a rotating band (driving band) 3 which transfers the torsional momentum from the grooves in the bore of the weapon, not illustrated, to the sabot 1 and which is made of steel.
  • a further similar rotating band (driving band) 4 is located at the forepart of the sabot 1. In order to save weight that portion of the sabot 1 situated between the two rotating bands (driving bands) 3 and 4 has been given a smaller external diameter than the tail portion.
  • a cylindrical drilling 5 at the front of the sabot 1 serves to centre and guide the subcalibre core 2.
  • This drilling 5 which is anodised by the Ematal process and then barrel burnished, opens into a coaxial drilling 7 of larger diameter machined into the tail of the sabot 1 and threaded as to its rearward portion.
  • the transition from drilling 5 to drilling 7 takes the form of a shoulder 6.
  • a solid piece 8 with a depression 9 in its forward face is located by screwing.
  • This depression '9 is surrounded by an annular surface 3,447,466 Patented June 3, 1969 10 against which the tail surface of the subcalibre core 2 is braced.
  • In the annular cavity 11 delimited by the shoulder 6 and the forward face of the screwed piece 8 are the orifices of two drillings 12 which penetrate the wall of the sabot 1.
  • the subcalibre core 2 is made partly or wholly of tungsten carbide and to be provided with a cylindrical centre section which culminates in an ogive 13 in front and has a tail portion 14.
  • an annular safety element 16 is located between the shoulder 6 of the sabot 1 and the grooved wall arranged perpendicular to the axis of the projectile as the rear supporting surface of the subcalibre core 2.
  • a forward zone 19 of the tail portion 14 of the subcalibre core limited by the rear grooved wall 26 is formed by a truncated cone expanding towards the rear.
  • a further cylindrical piece 21 adjoining the aforementioned truncated cone 19 at the rear and hereinafter referred to as the guide zone has an equal diameter to the centre section but in relation to the drilling 5 in the sabot 1 has a small amount of play which may for example amount to 0.03 mm.
  • the height of this guide zone 21 is determined by the requirement that the tail portion 14 of the subcalibre core 2 be able to rotate in the drilling 5 about the forward edge 24 of the zone 21, i.e.
  • the tail portion must be located within a spherical zone the radius R of which is equal to the radius of the drilling 5 of the sabot 1 and with approximately the same diameter as the centre section of the subcalibre core.
  • the third zone forming the rear end of the tail portion 14 is a truncated cone 22 which tapers towards the rear from the diameter of the guide zone 21.
  • the generatrices of the said truncated cone form an angle with the base surface 27 which is greater than for example in order to obviate material crumbling away along the periphery of the base surface 27 under the heavy pressure loadings of firing.
  • the generatrices of the truncated cone 19 coincide with straight lines which connect the leading edge 24 'of the cylindrical guide zone 21 with the interior edge of the grooved wall 25 laid out transverse to the axis of the projectile and limiting the annular groove at the front. These sraight lines form with the axis of the projectile an angle which is at least as large as the maximum angle of pitch the subcalibre core 2 can take up on emerging from the sabot 1.
  • the second execution version of a subcalibre core 2 as illustrated in FIG. 2 is distinguished from the example illustrated in FIG. 1 by the fact that the guide zone 20 reaches as far as the annular groove 15 and is formed by a zone of a sphere.
  • the largest cross-section of the spherical zone 20 aligned perpendicular to the axis of the projectile and parallel to a terminal surface displays a diameter which corresponds to the diameter of the sphere and therefore to the diameter of the centre section of the subcalibre core 2.
  • This layer which adheres to the outer surface to a thickness of 1.5 to 2, 0.10- mm., is then lightly polished after which the subcalibre core is heated and held at a temperature of 80 to 100 degrees centigrade for at least 2 minutes. During this period the solvent and thinner agent evaporates so that finally a dry lubrication film consisting of M05 is left adhering to the subcalibre core. The composition of this film will not alter even during years of shelf life.
  • the sabot projectile accelerates rapidly in the bore and the subcalibre core 2 is pressed against the bearing surface and compresses, i.e. plastically deforms it. In relation to the sabot 1 the subcalibre core 2 thus moves to the rear and this releases the grip of the safety element 16.
  • the safety element 16 On axial acceleration by the subcalibre core 2 the safety element 16 is pressed against the rear grooved wall and is itself set in rotation by the frictional force that is thus generated, so that even before the sabot projectile leaves the bore of the weapon the safety element expands under the influence of the centrifugal force acting upon it, moves completely free of the annular groove and positions itself in the buffer chamber 11 with its outer surface 17 against the inner surface of the drilling 7.
  • the sabot 1 After emergence of the sabot projectile from the bore of the weapon, the sabot 1 is by reason of its large leading surface more heavily decelerated than the subcalibre core 2 so that the latter moves forward in relation to the sabot 1, i.e. overruns it, and by reason of the low level of friction to be overcome by the subcalibre core 2 with its coating of lubricating film when moving within the drilling 5 of the sabot 1 this overrunning effect is almost Without impediment.
  • the truncated cone forming the leading zone 19 of the tail portion of the subcalibre core 2 is able to position itself against the wall of the sabot drilling 5 and slip along it in a forward direction without any diametrically adjacent portion of the tail portion 14 touching the wall of the drilling 5.
  • the spherical guide zone 20 acts as an articulation preventing jamming.
  • the size of the distance between the rearward end of the centre section of the subcalibre core 2 and the guide zones 21 and 20, or between the edges 23 and 24 (FIG. 1), or between the edge 23 and the greatest diameter of the spherical zone 20, designated 29 (FIG. 2), conditions the size of the bearing forces transmitted to the subcalibre core 2 by the wall of the drilling 5, forces which are generated when forces acting transversely to the subcalibre core 2 affect it.
  • the facility is obtained to influence favourably the frictional resistance forces generated by these bearing forces.
  • Sabot projectile in accordance with claim 1 with a film of dry lubricating agent covering the subcalibre core and with an anodized and burnished bore in the aluminium alloy sabot.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Earth Drilling (AREA)
US665324A 1967-09-05 1967-09-05 Sabot projectile with core guiding means Expired - Lifetime US3447466A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US66532467A 1967-09-05 1967-09-05

Publications (1)

Publication Number Publication Date
US3447466A true US3447466A (en) 1969-06-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
US665324A Expired - Lifetime US3447466A (en) 1967-09-05 1967-09-05 Sabot projectile with core guiding means

Country Status (7)

Country Link
US (1) US3447466A (de)
AT (1) AT281639B (de)
BE (1) BE719364A (de)
CH (1) CH495546A (de)
FR (1) FR1581217A (de)
GB (1) GB1222737A (de)
NL (1) NL6812687A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890902A (en) * 1973-12-04 1975-06-24 Us Army Projectile
US3913489A (en) * 1973-12-19 1975-10-21 Us Army Projectile
US3927618A (en) * 1971-03-29 1975-12-23 Oerlikon Buehrle Ag Sabot projectile
US4850280A (en) * 1986-10-21 1989-07-25 Rheinmetall Gmbh Propelling cage projectile arrangement
US5182419A (en) * 1978-05-26 1993-01-26 Asi Systems International Saboted projectile
DE19613862A1 (de) * 1996-04-06 1997-10-09 Diehl Gmbh & Co Geschoß mit einem Treibspiegel
US20110000391A1 (en) * 2008-03-20 2011-01-06 Rheinmetall Waffe Muniton Gmbh Method for producing a shell and a shell with a sabot projectile produced by this method
US11402188B1 (en) * 2020-08-28 2022-08-02 The United States Of America As Represented By The Secretary Of The Army Pyrotechnic delayed extended range shotgun munition
US20220252382A1 (en) * 2019-04-26 2022-08-11 University Of Kansas Maneuvering aeromechanically stable sabot system
US11674782B1 (en) * 2020-08-28 2023-06-13 The United States Of America As Represented By The Secretary Of The Army Piston actuated extended range projectile with segmented slip band

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6279214B1 (en) * 1999-07-14 2001-08-28 Alliant Techsystems Inc. Moisture seal for composite sabot with depleted uranium penetrator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US405690A (en) * 1889-06-25 Combined projectile and gas-check
GB131034A (en) * 1918-03-28 1919-08-21 Leonard Godfrey Pinney Thring Improvements in or relating to Subcalibre Projectiles.
US3359905A (en) * 1965-04-01 1967-12-26 Oerlikon Buehrle Holding Ag Sabot projectile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US405690A (en) * 1889-06-25 Combined projectile and gas-check
GB131034A (en) * 1918-03-28 1919-08-21 Leonard Godfrey Pinney Thring Improvements in or relating to Subcalibre Projectiles.
US3359905A (en) * 1965-04-01 1967-12-26 Oerlikon Buehrle Holding Ag Sabot projectile

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927618A (en) * 1971-03-29 1975-12-23 Oerlikon Buehrle Ag Sabot projectile
US3890902A (en) * 1973-12-04 1975-06-24 Us Army Projectile
US3913489A (en) * 1973-12-19 1975-10-21 Us Army Projectile
US5182419A (en) * 1978-05-26 1993-01-26 Asi Systems International Saboted projectile
US4850280A (en) * 1986-10-21 1989-07-25 Rheinmetall Gmbh Propelling cage projectile arrangement
DE19613862A1 (de) * 1996-04-06 1997-10-09 Diehl Gmbh & Co Geschoß mit einem Treibspiegel
US20110000391A1 (en) * 2008-03-20 2011-01-06 Rheinmetall Waffe Muniton Gmbh Method for producing a shell and a shell with a sabot projectile produced by this method
US8522683B2 (en) * 2008-03-20 2013-09-03 Rheinmetall Waffe Munition Gmbh Method for producing a shell and a shell with a sabot projectile produced by this method
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
US20240175666A1 (en) * 2019-04-26 2024-05-30 University Of Kansas Maneuvering aeromechanicaly stable sabot system
US12566054B2 (en) * 2019-04-26 2026-03-03 The University Of Kansas Maneuvering aeromechanically stable sabot system
US11402188B1 (en) * 2020-08-28 2022-08-02 The United States Of America As Represented By The Secretary Of The Army Pyrotechnic delayed extended range shotgun munition
US11674782B1 (en) * 2020-08-28 2023-06-13 The United States Of America As Represented By The Secretary Of The Army Piston actuated extended range projectile with segmented slip band

Also Published As

Publication number Publication date
CH495546A (de) 1970-08-31
GB1222737A (en) 1971-02-17
BE719364A (de) 1969-01-16
AT281639B (de) 1970-05-25
FR1581217A (de) 1969-09-12
NL6812687A (de) 1969-03-07

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