EP0264379B1 - High velocity ammunition sabot - Google Patents

High velocity ammunition sabot Download PDF

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Publication number
EP0264379B1
EP0264379B1 EP86904471A EP86904471A EP0264379B1 EP 0264379 B1 EP0264379 B1 EP 0264379B1 EP 86904471 A EP86904471 A EP 86904471A EP 86904471 A EP86904471 A EP 86904471A EP 0264379 B1 EP0264379 B1 EP 0264379B1
Authority
EP
European Patent Office
Prior art keywords
sabot
projectile
core
rifle barrel
plastics material
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
EP86904471A
Other languages
German (de)
French (fr)
Other versions
EP0264379A1 (en
EP0264379A4 (en
Inventor
Henry J. Halverson
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.)
Olin Corp
Original Assignee
Olin Corp
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 Olin Corp filed Critical Olin Corp
Priority to AT86904471T priority Critical patent/ATE50052T1/en
Publication of EP0264379A1 publication Critical patent/EP0264379A1/en
Publication of EP0264379A4 publication Critical patent/EP0264379A4/en
Application granted granted Critical
Publication of EP0264379B1 publication Critical patent/EP0264379B1/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
    • 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
    • F42B14/068—Sabots characterised by the material

Definitions

  • This invention relates to small caliber rifle ammunition comprising a projectile or bullet mounted in a disintegratable plastics sabot which stabilizes the projectile or bullet as it is shot through the rifle barrel, but which disintegrates upon exiting the barrel leaving the projectile or bullet to continue its trajectory to the target.
  • Standard caliber as used herein means 0.50" (12.7 mm) caliber and below.
  • the state of the art in plastic caliber sabots has basically remained static since the development of the plastic sabot for hunting ammunition shown in US-A-3,164,092 assigned to the Remington Arms Co. Inc. and which relates to the well-known Remington "Accelerator” hunting cartridge which uses a lead bullet in a polycarbonate sabot.
  • constructed sabots are also disclosed in US-A-3,311,061.
  • a small caliber ammunition projectile or bullet comprising a sabot which is strong enough to exit a rifled barrel in one piece at peak chamber pressures in excess of 70,000 copper crusher units of pressure (C.U.P.), but which then immediately disintegrates so that it does not thereafter slow down the projectile or make the projectile inaccurate.
  • the sabot of the present invention is distinguished in that it is of a relatively brittle plastics material which actually disintegrates, rather than tears away, as the projectile is launched.
  • the present invention provides a small (12.7 mm or less) caliber projectile comprising a sub-caliber, hard, armour-penetrating metallic core axially received within a plastics sabot which detaches itself from the core substantially immediately upon exit of the projectile from the rifle barrel after firing, said sabot comprising a sleeve closed at one end and open at the other to receive the core, the closed end of the sabot providing a solid base to the sabot located to the rear of the core, the sabot being constructed of a plastics material having sufficient tensile, shear and compressive strengths to withstand explosive discharge of the projectile from a rifle barrel with the sabot intact, and before detaching itself from the projectile, wherein the sabot is constructed of a relatively brittle plastics material having insufficient impact strength to withstand the centrifugal and aerodynamic forces imposed thereon upon exiting of the projectile from the rifle barrel, such forces causing the sabot to
  • the invention provides a sabot for use with such a projectile, said sabot comprising a sleeve closed at on end and open at the other to receive the core, the closed end of the sabot providing a solid base to the sabot located to the rear of the core, the sabot being constructed of a plastics material having sufficient tensile, shear and compressive strengths to withstand explosive discharge of the projectile from a rifle barrel with the sabot intact, and before detaching itself from the projectile, wherein the sabot is constructed of a relatively brittle plastics material having insufficient impact strength to withstand the centrifugal and aerodynamic forces imposed thereon upon exiting of the projectile from the rifle barrel, such forces causing the sabot to disintegrate substantially immediately upon exiting of the projectile from the rifle barrel, and thereby freeing the core to continue its trajectory unimpeded.
  • the sabot is constructed of a plastics material having tensile and shear strengths (ASTM D 1708 and ASTM D 732, respectively) of at least 12,000 psi (82.74 MPa), a compressive strength of at Ieast.15,000 psi (103.43 MPa) and an Izod impact strength (ASTM D 256) below about 12 ft.-tbs/in.(6.4 Nm/cm).
  • said plastics material is
  • a small caliber (12.7 mm or less) ammunition projectile 10 having the major part of its rear cylindrical portion 12 mounted within the central recess 14 of a generally cylindrical plastic sabot 16 which has a solid cylindrical rear base portion 18 and a tubular front portion 20.
  • Front portion 20 comprises a plurality of arcuate segments 22 interconnected by weakened or frangible web portions 24 extending axially on portion 20.
  • Such segments and webs 24 are formed by angularly spaced axial grooves or notches 26 on the inner periphery of front portion 20, and are pointed at their inner ends to concentrate the fracturing forces at this point so that the fracture paths of the sabot are to some extent predetermined.
  • the outer periphery 28 of sabot 16 is an uninterrupted right cylindrical surface.
  • a metallic square washer or plate with rounded corners 34 (also shown in Figure 2) which extends radially inward and outward of the inner periphery of central recess 14 so as to distribute the accelerational forces during explosive discharge of sabot 16 and projectile 10 together through a rifled gun barrel (not shown) and to prevent rotational slippage between sabot 16 and washer 34 during spin-up of sabot 16 during such discharge.
  • Washer 34 could be of other non-circular symmetrical shapes such as polygonal (pentagonal, or hexagonal, etc.), oval, or gear-shaped. Washer 34 has rounded corners to reduce stress concentrations at its corners and to allow use of bigger area washers.
  • Outer periphery 28 of sabot 16 is of a substantially constant diameter from base 18 up to an axial point 36 which is located forward of the centre of gravity 38 of projectile 10 to minimize balloting of projectile 10 during its passage through a rifled gun barrel, as might occur if point 36 was located back of centre of gravity 38.
  • heavier projectile 10a is shown mounted in an identical sabot and having a centre of gravity 38a, which is also behind point 36.
  • Sabot 16 is of 7.62 mm caliber and carries a 52 grain tungsten projectile 10, or alternatively a 57 grain tungsten projectile 10a as shown in outline.
  • Other calibers of sabot 16 such as 5.56 mm or 0.50 caliber could also be utilized and other sizes, materials, and shapes of projectiles 10 could be utilized, if desired.
  • the plastic for sabot 10 is of a material that has sufficient tensile strength (at least 12,000 psi: 82.74 MPa), compressive strength (at least 15,000 psi:103.43 MPa), and sufficient shear strength (at least 12,000 psi: 82.74 M Pa) to withstand the shock of explosive discharge from a rifled gun barrel while carrying projectile 10, but having insufficient (less than about 12 ft.-Ibs/in: 6.4 Nm/cm) Izod impact strength to withstand centrifugal and aerodynamic forces following discharge so that sabot 16 disintegrates immediately (i.e. within a yard) after exiting the barrel muzzle, thus immediately freeing the projectile 10 for unimpeded flight to the target.
  • plastic material is "ULTEM 1000", an unreinforced amorphous polyetherimide thermoplastic resin marketed by General Electric Company. Some other plastics believed to be suitable are ULTEM 2200, a 20% glass reinforced polyetherimide resin, and LEXAN 3412, a 20% glass reinforced polycarbonate resin, both from General Electric Company, and TORLON 4203L engineering resin from Amoco Chemicals Corporation. Other plastics with equivalent mechanical properties could be utilized if the mechanical properties of the plastic are not chemically deteriorated by any exposure to propellants with which it is expected to be utilized.

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  • General Engineering & Computer Science (AREA)
  • Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Glass Compositions (AREA)
  • Soft Magnetic Materials (AREA)
  • Hydraulic Turbines (AREA)
  • Telescopes (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Table Devices Or Equipment (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Paints Or Removers (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Belt Conveyors (AREA)

Abstract

A high velocity ammunition sabot (16) of brittle material which has sufficient strength to withstand the forces of being launched from a rifled gun barrel but which fragments almost immediately upon exit from the barrel due to centrifugal forces. A polyetherimide material is preferred, although materials of equivalent properties could be used.

Description

  • This invention relates to small caliber rifle ammunition comprising a projectile or bullet mounted in a disintegratable plastics sabot which stabilizes the projectile or bullet as it is shot through the rifle barrel, but which disintegrates upon exiting the barrel leaving the projectile or bullet to continue its trajectory to the target.
  • "Small caliber" as used herein means 0.50" (12.7 mm) caliber and below. The state of the art in plastic caliber sabots has basically remained static since the development of the plastic sabot for hunting ammunition shown in US-A-3,164,092 assigned to the Remington Arms Co. Inc. and which relates to the well-known Remington "Accelerator" hunting cartridge which uses a lead bullet in a polycarbonate sabot. Similarly constructed sabots are also disclosed in US-A-3,311,061.
  • There is a constant desire to increase the speed, hardness, and density of lightweight sub-caliber rifle bullets so that they will penetrate harder and thicker targets. However, it has not been known how to do this in conventional rifles due to the denser bullet materials that are required, and the inability of existing sabots, such as that taught by US-A-3,164,092, to withstand the forces imposed by such launches. Generally such sabots have been designed to tear away from the projectile upon launch as an integral unit and to this end the teaching has been against the use of brittle materials in the construction of the sabot and which fracture rather than tear.
  • In accordance with the present invention, a small caliber ammunition projectile or bullet is provided comprising a sabot which is strong enough to exit a rifled barrel in one piece at peak chamber pressures in excess of 70,000 copper crusher units of pressure (C.U.P.), but which then immediately disintegrates so that it does not thereafter slow down the projectile or make the projectile inaccurate. Compared with the sabots of US-A-3,164,092 and US-A-3,311,061, the sabot of the present invention is distinguished in that it is of a relatively brittle plastics material which actually disintegrates, rather than tears away, as the projectile is launched.
  • In one aspect, the present invention provides a small (12.7 mm or less) caliber projectile comprising a sub-caliber, hard, armour-penetrating metallic core axially received within a plastics sabot which detaches itself from the core substantially immediately upon exit of the projectile from the rifle barrel after firing, said sabot comprising a sleeve closed at one end and open at the other to receive the core, the closed end of the sabot providing a solid base to the sabot located to the rear of the core, the sabot being constructed of a plastics material having sufficient tensile, shear and compressive strengths to withstand explosive discharge of the projectile from a rifle barrel with the sabot intact, and before detaching itself from the projectile, wherein the sabot is constructed of a relatively brittle plastics material having insufficient impact strength to withstand the centrifugal and aerodynamic forces imposed thereon upon exiting of the projectile from the rifle barrel, such forces causing the sabot to disintegrate substantially immediately upon exiting of the projectile from the rifle barrel, and thereby freeing the core to continue its trajectory unimpeded.
  • In a second aspect, the invention provides a sabot for use with such a projectile, said sabot comprising a sleeve closed at on end and open at the other to receive the core, the closed end of the sabot providing a solid base to the sabot located to the rear of the core, the sabot being constructed of a plastics material having sufficient tensile, shear and compressive strengths to withstand explosive discharge of the projectile from a rifle barrel with the sabot intact, and before detaching itself from the projectile, wherein the sabot is constructed of a relatively brittle plastics material having insufficient impact strength to withstand the centrifugal and aerodynamic forces imposed thereon upon exiting of the projectile from the rifle barrel, such forces causing the sabot to disintegrate substantially immediately upon exiting of the projectile from the rifle barrel, and thereby freeing the core to continue its trajectory unimpeded.
  • Preferably the sabot is constructed of a plastics material having tensile and shear strengths (ASTM D 1708 and ASTM D 732, respectively) of at least 12,000 psi (82.74 MPa), a compressive strength of at Ieast.15,000 psi (103.43 MPa) and an Izod impact strength (ASTM D 256) below about 12 ft.-tbs/in.(6.4 Nm/cm). Most preferably said plastics material is
    • (a) a thermoplastic, amorphous polyetherimide resin,
    • (b) a thermoplastic polycarbonate resin reinforced with glass fibres, or
    • (c) a thermoplastic polyetherimide resin reinforced with glass fibres.
  • The invention will be further described with reference to the accompanying drawings, in which:
    • Figure 1 is a cross-sectional view taken along the axis of an ammunition projectile according to the invention, and
    • Figure 2 is an isometric view of a washer as used in the projectile of Figure 1.
  • Referring to the drawings, a small caliber (12.7 mm or less) ammunition projectile 10 is shown having the major part of its rear cylindrical portion 12 mounted within the central recess 14 of a generally cylindrical plastic sabot 16 which has a solid cylindrical rear base portion 18 and a tubular front portion 20. Front portion 20 comprises a plurality of arcuate segments 22 interconnected by weakened or frangible web portions 24 extending axially on portion 20. Such segments and webs 24 are formed by angularly spaced axial grooves or notches 26 on the inner periphery of front portion 20, and are pointed at their inner ends to concentrate the fracturing forces at this point so that the fracture paths of the sabot are to some extent predetermined. The outer periphery 28 of sabot 16 is an uninterrupted right cylindrical surface.
  • Between the inner end 30 of recess 14 of sabot 16 and the rear end 32 of projectile 10 is a metallic square washer or plate with rounded corners 34 (also shown in Figure 2) which extends radially inward and outward of the inner periphery of central recess 14 so as to distribute the accelerational forces during explosive discharge of sabot 16 and projectile 10 together through a rifled gun barrel (not shown) and to prevent rotational slippage between sabot 16 and washer 34 during spin-up of sabot 16 during such discharge. Washer 34 could be of other non-circular symmetrical shapes such as polygonal (pentagonal, or hexagonal, etc.), oval, or gear-shaped. Washer 34 has rounded corners to reduce stress concentrations at its corners and to allow use of bigger area washers.
  • Outer periphery 28 of sabot 16 is of a substantially constant diameter from base 18 up to an axial point 36 which is located forward of the centre of gravity 38 of projectile 10 to minimize balloting of projectile 10 during its passage through a rifled gun barrel, as might occur if point 36 was located back of centre of gravity 38. In an alternative embodiment, shown in outline, heavier projectile 10a is shown mounted in an identical sabot and having a centre of gravity 38a, which is also behind point 36.
  • Sabot 16 is of 7.62 mm caliber and carries a 52 grain tungsten projectile 10, or alternatively a 57 grain tungsten projectile 10a as shown in outline. Other calibers of sabot 16 such as 5.56 mm or 0.50 caliber could also be utilized and other sizes, materials, and shapes of projectiles 10 could be utilized, if desired.
  • The plastic for sabot 10 is of a material that has sufficient tensile strength (at least 12,000 psi: 82.74 MPa), compressive strength (at least 15,000 psi:103.43 MPa), and sufficient shear strength (at least 12,000 psi: 82.74 M Pa) to withstand the shock of explosive discharge from a rifled gun barrel while carrying projectile 10, but having insufficient (less than about 12 ft.-Ibs/in: 6.4 Nm/cm) Izod impact strength to withstand centrifugal and aerodynamic forces following discharge so that sabot 16 disintegrates immediately (i.e. within a yard) after exiting the barrel muzzle, thus immediately freeing the projectile 10 for unimpeded flight to the target.
  • One suitable plastic material is "ULTEM 1000", an unreinforced amorphous polyetherimide thermoplastic resin marketed by General Electric Company. Some other plastics believed to be suitable are ULTEM 2200, a 20% glass reinforced polyetherimide resin, and LEXAN 3412, a 20% glass reinforced polycarbonate resin, both from General Electric Company, and TORLON 4203L engineering resin from Amoco Chemicals Corporation. Other plastics with equivalent mechanical properties could be utilized if the mechanical properties of the plastic are not chemically deteriorated by any exposure to propellants with which it is expected to be utilized.

Claims (11)

1. A small (12.7 mm or less) caliber projectile comprising a sub-caliber, hard, armour-penetrating metallic core (10) axially received within a plastics sabot (16) which detaches itself from the core substantially immediately upon exit of the projectile from the rifle barrel after firing, said sabot (16) comprising a sleeve (20) closed at one end (18) and open at the other to receive the core, the closed end (18) of the sabot providing a solid base to the sabot located to the rear of the core (10), the sabot being constructed of a plastics material having sufficient tensile, shear and compressive strengths to withstand explosive discharge of the projectile from a rifle barrel with the sabot intact, and before detaching itself from the projectile, characterised in that the sabot is constructed of a relatively brittle plastics material having insufficient impact strength to withstand the centrifugal and aerodynamic forces imposed thereon upon exiting of the projectile from the rifle barrel, such forces causing the sabot to disintegrate substantially immediately upon exiting of the projectile from the rifle barrel, and thereby freeing the core to continue its trajectory unimpeded.
2. A projectile according to claim 1, wherein the sabot is constructed of a plastics material having tensile and shear strengths (ASTM D 1708 and ASTM D 732, respectively) of at least 12,000 psi (82.74 MPa), a compressive strength of at least 15,000 psi (103.43 MPa) and an Izod impact strength (ASTM D 256) below about 12 ft.-Ibs/in.(6.4 Nm/cm).
3. A projectile according to claim 1 or 2, wherein said plastics material is
(a) a thermoplastic, amorphous polyetherimide resin,
(b) a thermoplastic polycarbonate resin reinforced with glass fibres, or
(c) a thermoplastic polyetherimide resin reinforced with glass fibres.
4. A projectile according to any one of claims 1 to 3, wherein the sabot comprises a cylindrical body (16) having a rear base portion (18) and an open ended front portion (20) with a central recess (14) therein which surrounds and receives the rear portion (12) of the core (10).
5. A projectile according to clain 4, wherein the front portion (20) of the sabot is provided interiorly with a plurality of axial notches (26) spaced therearound which divide the front portion (20) of the sabot into a plurality of arcuate segments (22) interconnected by frangible webs (24), said segments (22) and webs (24) providing the body (16) of the sabot with an uninterrupted cylindrical surface.
6. A projectile according to claim 5, wherein said notches (26) extend axially only part way from the open front end of the sabot towards the base (18) and are pointed at their inward ends, thereby to concentrate the stresses applied to the sabot upon exiting from the rifle barrel at a plurality of points spaced around the sabot, thereby to direct the disintegration of the sabot along relatively predictable paths.
7. A projectile according to claim 6, wherein the forward end fo the sabot is of a reduced external diameter, said reduced diameter extending rearwardly to a point forward of the centre of gravity of the projectile, thereby weakening the front of the sabot to promote separation of the segments (22) during disintegration of the sabot, but whilst still providing a sufficient bourrelet surface to minimise balloting of the projectile during its passage through the rifle barrel upon firing.
8. A projectile according to any one of claims 1 to 7, comprising a symmetrical, non-circular, centrally perforated flat metallic plate (34) located in the sabot (16) between the base (18) of the sabot and the rear face (32) of the core (10).
9. A projectile according to claim 8, wherein said plate (34) is square with rounded corners.
10. A sabot for a small (12.7 mm or less) calibre projectile as claimed in claim 1, said sabot (16) comprising a sleeve (20) closed at one end (18) and open at the other to receive the core, the closed end (18) of the sabot providing a solid base to the sabot located to the rear of the core (10), the sabot being constructed of a plastics material having sufficient tensile, shear and compressive strengths to withstand explosive discharge of the projectile from a rifle barrel with the sabot intact, and before detaching itself from the projectile, characterised in that the sabot is constructed of a relatively brittle plastics material having insufficient impact strength to withstand the centrifugal and aerodynamic forces imposed thereon upon exiting of the projectile from the rifle barrel, such forces causing the sabot to disintegrate substantially immediately upon exiting of the projectile from the rifle barrel, and thereby freeing the core to continue its trajectory unimpeded.
11. A sabot according to claim 10 having the features required by any of claims 2 to 7.
EP86904471A 1986-03-10 1986-03-10 High velocity ammunition sabot Expired - Lifetime EP0264379B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86904471T ATE50052T1 (en) 1986-03-10 1986-03-10 HIGH SPEED AMMUNITION GUIDE RING.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1986/000491 WO1987005386A1 (en) 1986-03-10 1986-03-10 High velocity ammunition sabot

Publications (3)

Publication Number Publication Date
EP0264379A1 EP0264379A1 (en) 1988-04-27
EP0264379A4 EP0264379A4 (en) 1988-05-31
EP0264379B1 true EP0264379B1 (en) 1990-01-31

Family

ID=22195408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86904471A Expired - Lifetime EP0264379B1 (en) 1986-03-10 1986-03-10 High velocity ammunition sabot

Country Status (9)

Country Link
EP (1) EP0264379B1 (en)
JP (1) JP2587820B2 (en)
AT (1) ATE50052T1 (en)
BR (1) BR8607108A (en)
DE (1) DE3668690D1 (en)
DK (1) DK165523C (en)
FI (1) FI91324C (en)
NO (1) NO165266C (en)
WO (1) WO1987005386A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257777B (en) * 1990-02-08 1993-09-22 Secr Defence Hypervelocity sabot
GB9002829D0 (en) * 1990-02-08 1990-04-04 Secr Defence Hypervelocity sabot
US7594472B1 (en) 1990-06-13 2009-09-29 Qinetiq Limited Sabot
DE4330417C2 (en) * 1993-09-08 1998-02-26 Rheinmetall Ind Ag Sabot for a sub-caliber projectile
JP2002295998A (en) * 2001-03-29 2002-10-09 Sumitomo Bakelite Co Ltd Spacer

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3164092A (en) * 1962-11-13 1965-01-05 Remington Arms Co Inc Ammunition sabot
US3311061A (en) * 1964-06-25 1967-03-28 Ehoy C Roehrdanz Sabot
DE1262830B (en) * 1964-09-02 1968-03-07 Bundesrep Deutschland Sabot for sub-caliber bullets
US3435768A (en) * 1967-07-24 1969-04-01 Oerlikon Buehrle Holding Ag Sabot projectile
NL137889C (en) * 1967-07-28
US4187271A (en) * 1977-04-18 1980-02-05 Owens-Corning Fiberglas Corporation Method of making same
US4148259A (en) * 1977-10-03 1979-04-10 The United States Of America As Represented By The Secretary Of The Army Sabot assembly for a subcaliber spin stabilized projectile
US4239006A (en) * 1978-07-27 1980-12-16 Kelson Richard D Self lubricating sabot
US4488491A (en) * 1983-03-30 1984-12-18 The United States Of America As Represented By The Secretary Of The Army Area multiplier

Also Published As

Publication number Publication date
DK165523C (en) 1993-04-26
EP0264379A1 (en) 1988-04-27
NO874659L (en) 1988-01-08
JP2587820B2 (en) 1997-03-05
WO1987005386A1 (en) 1987-09-11
DK165523B (en) 1992-12-07
DK585687A (en) 1987-11-09
FI91324B (en) 1994-02-28
FI91324C (en) 1994-06-10
NO165266B (en) 1990-10-08
DE3668690D1 (en) 1990-03-08
NO874659D0 (en) 1987-11-09
BR8607108A (en) 1988-02-09
JPS63502922A (en) 1988-10-27
FI874940A (en) 1987-11-09
FI874940A0 (en) 1987-11-09
ATE50052T1 (en) 1990-02-15
DK585687D0 (en) 1987-11-09
NO165266C (en) 1991-01-16
EP0264379A4 (en) 1988-05-31

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