US3348485A - Armor piercing shell - Google Patents

Armor piercing shell Download PDF

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Publication number
US3348485A
US3348485A US493050A US49305065A US3348485A US 3348485 A US3348485 A US 3348485A US 493050 A US493050 A US 493050A US 49305065 A US49305065 A US 49305065A US 3348485 A US3348485 A US 3348485A
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US
United States
Prior art keywords
core
shell
edge
envelope
cup
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
US493050A
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English (en)
Inventor
Dufour Georges
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.)
Brevets Aero Mecaniques SA
Original Assignee
Brevets Aero Mecaniques 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 Brevets Aero Mecaniques SA filed Critical Brevets Aero Mecaniques SA
Application granted granted Critical
Publication of US3348485A publication Critical patent/US3348485A/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
    • 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
    • F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
    • F42B12/06—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with hard or heavy core; Kinetic energy penetrators

Definitions

  • the core of the shell according to this invention which is surronded by an envelope has a cup-shaped front part, the edge of this cup-shaped part constituting the only portion of the core projecting toward the front, the angle made, in a radial plane of the shell, between the tangent at said edge to an axial section of the outer surface of said core and a parallel to the shell axis ranging from 25 to 35 and the angle made, also in said radial plane, between said tangent and the tangent to said cup at said edge being substantially equal to 90.
  • the present invention relates to armor piercing shells comprising a core of hard material and an envelope of a light material the diameter of which is greater than that of the core.
  • the hard material may be a sintered metal or alloy.
  • the light material must have a density substantially lower than that of steel and may be an aluminum alloy, or possibly a plastic material.
  • the object of the present invention is to improve the capacity of penetration of such shells into targets the surface of which is not perpendicular to the shell trajectory.
  • the shells according to the present invention are characterized by the fact that the front end of their core is in the form of a cup the edge of which constitutes the most forwardly projecting portion of said core.
  • the diameter of this edge is preferably at most equal to one half of the diameter of the main cylindrical portion of the core.
  • the core may be fixed to the envelope in the axial direction by glueing, in particular by means of an adhesive material consisting of a solution of an etboxyline or a similar resin.
  • the invention is also concerned with a method of manufacturing such cores when they are made of a sintered metal or alloy, the object being to reduce the risks of breaking of the envelope bottom.
  • the method according to the present invention is characterized by the fact of making use of a sintering mold having a slightly convex face in the portion thereof corresponding to the rear face of the core to be sintered, whereby this rear face of this core is normally slightly concave, or possibly accidentally flat, but is never convex.
  • FIG. 1 is an axial sectional view of an armor piercing shell made according to the present invention
  • FIG. 2 shows, partly and in sectional view, the mold to be used for sintering the core of said shell
  • FIG. 3 is a diagram illustrating the advantages of the shell according to the present invention.
  • This shell includes a core 1 made of a hard material, in particular of a sintered metal or alloy, such as tungsten carbide, and an envelope of a light material, in particular of an aluminum alloy.
  • this envelope comprises an ogive 2 and a hollow body 3, assembled together in any suitable manner, for instance by screwing or by stamping.
  • the core is generally in the form of a cylinder terminating, at the front end thereof, in a central point.
  • This shape would be the best if the projectile were to pierce only targets having their surfaces substantially perpendicular to the shell trajectory.
  • the target surfaces nearly aways make an angle different from with this trajectory, and as this angle becomes smaller and smaller, it is found that the shells, instead of piercing the target, ricochet thereon in a proportion greater and greater.
  • the front end of core 1 is given the shape of a cup 4, the edge 5 of this cup constituting the most forwardly projecting portion of the core. This edge is preferably slightly rounded off.
  • the diameter d of edge 5 is at most equal to one half of the diameter D of the usual cylindrical portion of core 1, so that the core may have a sufficient piercing capacity.
  • the lower limit of diameter d is in accordance with the conditions of mechanical resistance to shocks, since the front portion of the core must not, as far as possible, break or separate from the body of the core when impinging upon an obstacle.
  • the length of the core being about 43 mm.
  • the shell may further comprise, in the usual manner, a pyrotechnic composition 6 (for instance an incendiary or tracer composition) housed in a cavity provided at chamber 7 limited inside envelope 2, 3 by the front portion of core 1.
  • a pyrotechnic composition 6 for instance an incendiary or tracer composition housed in a cavity provided at chamber 7 limited inside envelope 2, 3 by the front portion of core 1.
  • envelope body 3 is fitted with a rotating band 8, for instance of copper, sintered iron, soft steel, having an external diameter greater than that of envelope body 3.
  • Core 1 may be fixed to the envelope, and in particular to the body 3 thereof, by glueing, in particular by means of an adhesive substance consisting of a solution of an ethoxyline or similar resin, for instance of the kind of that designated by the trademark Araldite.
  • the glueing area has been shown at 9 on FIG. 1.
  • glueing on the body of envelope 3 permits of avoiding the holding means generally provided on ogive 2 to prevent core 1 from moving toward the front of the projectile during handling.
  • core 1 is made of a sintered metal or alloy
  • a sintering mold 11 see FIG. 2 the bottom 12 of which is slightly concave in the portion thereof corresponding to the rear face of the core to be sintered.
  • the rear face 13 of the sintered core is normally slightly concave or may be accidentally fiat, but it is never convex.
  • the armor piercing shell according to the present invention works as indicated by FIG. 3.
  • This figure shows, in abscissas, the angle C made by the trajectory of the shell with the surface struck by said shell and, in ordinates, the thickness e of an armored wall of constant quality.
  • Curve a in dotted lines shows the capacity of penetration of a conventional shell as a function of angle C.
  • Curve b in dot-and-dash lines shows this capacity for a shell having a core according to the present invention.
  • the capacity of penetration is slightly smaller for a shell according to the present invention for values of angle C close to 90. But on the contrary the shell according to the present invention shows a great improvement for values of angle C lower than 60".
  • curves a and b do not illustrate the frequency of misfires due to ricochets of the projectile on the armor and it should be pointed out that the proportion of these misfires is substantially higher in the case of curve a (conventional shell) than in that of curve b (shell according to the invention).
  • This reduction of the ricochets may be explained by the fact that, according to the invention, the point where the target is struck by the edge 5 of cup 4, due to the fact that it is offset with respect to the longitudinal axis of the core, creates a torque tending to make the shell perpendicular to the target, which is of course favorable to the piercing of said target. If a portion of the core other than the edge 5 of its cup 4 were located more 5 at the front than said edge 5, the results would be much less favorable because this portion would eliminate the above mentioned torque.
  • An armor piercing shell which comprises, in combination, a core of a hard material and, about said core, an envelope of a light material of a diameter greater than that of said core, wherein the front part of said core is in the form of a cup the edge of which constitutes the most forwardly projecting portion of said core and wherein the angle made, in a radial plane of the shell, between the tangent at said edge to an axial section of the outer surface of said core and a parallel to the shell axis ranges from 25 to 35 and the angle made, also in said radial plane, between said tangent and the tangent to said cup at said edge is substantially equal to 90 2.
  • An armor piercing shell according to claim 1 wherein the diameter of said edge is at most equal to one half of the diameter of the main cylindrical portion of the core.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
US493050A 1964-10-08 1965-10-05 Armor piercing shell Expired - Lifetime US3348485A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU47107A LU47107A1 (sv) 1964-10-08 1964-10-08

Publications (1)

Publication Number Publication Date
US3348485A true US3348485A (en) 1967-10-24

Family

ID=19723985

Family Applications (1)

Application Number Title Priority Date Filing Date
US493050A Expired - Lifetime US3348485A (en) 1964-10-08 1965-10-05 Armor piercing shell

Country Status (9)

Country Link
US (1) US3348485A (sv)
BE (1) BE670044A (sv)
CH (1) CH426555A (sv)
DE (1) DE1453811B1 (sv)
ES (1) ES318232A1 (sv)
GB (1) GB1092678A (sv)
LU (1) LU47107A1 (sv)
NL (1) NL6512935A (sv)
SE (1) SE311304B (sv)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750585A (en) * 1969-09-23 1973-08-07 Pacific Technica Corp Tracer projectiles
US3780658A (en) * 1971-09-03 1973-12-25 Ministre D Etat Charge Defense Undersized-caliber projectile with detachable sabot
US3795196A (en) * 1972-12-27 1974-03-05 Mauser Werke Ag Projectile with a loose hard core
US3948180A (en) * 1975-03-17 1976-04-06 The United States Of America As Represented By The Secretary Of The Navy Non-explosive shaped-charge follow-through projectile
US4015528A (en) * 1975-03-19 1977-04-05 The United States Of America As Represented By The Secretary Of The Air Force High density armor piercing projectile
US4043269A (en) * 1976-05-27 1977-08-23 The United States Of America As Represented By The Secretary Of The Army Sealed sabot projectile
US4945835A (en) * 1988-07-14 1990-08-07 Rheinmetall Gmbh Shaped charge projectile
US20060027128A1 (en) * 2004-02-10 2006-02-09 Hober Holding Company Firearms projectile having jacket runner
US20080264290A1 (en) * 2005-02-16 2008-10-30 Saltech Ag Bullet
US8869703B1 (en) * 2012-10-19 2014-10-28 Textron Systems Corporation Techniques utilizing high performance armor penetrating round

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2234219C1 (de) * 1972-07-12 1985-10-31 Rheinmetall GmbH, 4000 Düsseldorf Panzerbrechendes Geschoß
DE2824703C2 (de) * 1978-06-06 1982-11-25 Diehl GmbH & Co, 8500 Nürnberg Geschoß mit einem Durchschlagkörper
GB2123123A (en) * 1982-07-01 1984-01-25 Honeywell Inc Projectiles

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US572400A (en) * 1896-12-01 Explosive projectile amd method
FR476927A (fr) * 1914-04-08 1915-09-09 Thos Firth & Sons Ltd Perfectionnements apportés aux projectiles pour les plaques de blindage
US1419361A (en) * 1921-08-09 1922-06-13 John L Cox Armor-piercing projectile
US2276100A (en) * 1939-04-24 1942-03-10 Wilbur M Tiffany Fluid flow indicator
US2342006A (en) * 1942-01-19 1944-02-15 Lindley W Moore Projectile device
US2364643A (en) * 1941-02-12 1944-12-12 Wiley T Moore Explosive projectile
US2922366A (en) * 1956-05-22 1960-01-26 Lyon George Albert Projectile nose structure
US3096715A (en) * 1959-01-19 1963-07-09 Brevets Aero Mecaniques Armor-piercing projectiles

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1521406A (en) * 1921-08-24 1924-12-30 Taylor Leslie Bown Projectile
GB227730A (en) * 1924-07-04 1925-01-22 John Cockerill Soc A projectile for use against submarines

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US572400A (en) * 1896-12-01 Explosive projectile amd method
FR476927A (fr) * 1914-04-08 1915-09-09 Thos Firth & Sons Ltd Perfectionnements apportés aux projectiles pour les plaques de blindage
US1419361A (en) * 1921-08-09 1922-06-13 John L Cox Armor-piercing projectile
US2276100A (en) * 1939-04-24 1942-03-10 Wilbur M Tiffany Fluid flow indicator
US2364643A (en) * 1941-02-12 1944-12-12 Wiley T Moore Explosive projectile
US2342006A (en) * 1942-01-19 1944-02-15 Lindley W Moore Projectile device
US2922366A (en) * 1956-05-22 1960-01-26 Lyon George Albert Projectile nose structure
US3096715A (en) * 1959-01-19 1963-07-09 Brevets Aero Mecaniques Armor-piercing projectiles

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750585A (en) * 1969-09-23 1973-08-07 Pacific Technica Corp Tracer projectiles
US3780658A (en) * 1971-09-03 1973-12-25 Ministre D Etat Charge Defense Undersized-caliber projectile with detachable sabot
US3795196A (en) * 1972-12-27 1974-03-05 Mauser Werke Ag Projectile with a loose hard core
US3948180A (en) * 1975-03-17 1976-04-06 The United States Of America As Represented By The Secretary Of The Navy Non-explosive shaped-charge follow-through projectile
US4015528A (en) * 1975-03-19 1977-04-05 The United States Of America As Represented By The Secretary Of The Air Force High density armor piercing projectile
US4043269A (en) * 1976-05-27 1977-08-23 The United States Of America As Represented By The Secretary Of The Army Sealed sabot projectile
US4945835A (en) * 1988-07-14 1990-08-07 Rheinmetall Gmbh Shaped charge projectile
US20060027128A1 (en) * 2004-02-10 2006-02-09 Hober Holding Company Firearms projectile having jacket runner
US20080264290A1 (en) * 2005-02-16 2008-10-30 Saltech Ag Bullet
US8117967B2 (en) * 2005-02-16 2012-02-21 Saltech Ag Bullet
US8869703B1 (en) * 2012-10-19 2014-10-28 Textron Systems Corporation Techniques utilizing high performance armor penetrating round
US20140331883A1 (en) * 2012-10-19 2014-11-13 Textron Systems Corporation Techniques utilizing high performance armor penetrating round

Also Published As

Publication number Publication date
CH426555A (fr) 1966-12-15
DE1453811B1 (de) 1969-12-04
ES318232A1 (es) 1966-04-16
NL6512935A (sv) 1966-04-12
LU47107A1 (sv) 1966-04-08
BE670044A (sv) 1966-01-17
SE311304B (sv) 1969-06-02
GB1092678A (en) 1967-11-29

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