US3913489A - Projectile - Google Patents
Projectile Download PDFInfo
- Publication number
- US3913489A US3913489A US426270A US42627073A US3913489A US 3913489 A US3913489 A US 3913489A US 426270 A US426270 A US 426270A US 42627073 A US42627073 A US 42627073A US 3913489 A US3913489 A US 3913489A
- Authority
- US
- United States
- Prior art keywords
- main body
- projectile
- rotating band
- forwardly
- bore rider
- 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
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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
- This invention relates to projectiles, and more particularly to an ammunition projectile having a main body and an aerodynamic windshield or nose.
- One of the objects of the invention is to provide an ammunition projectile which can be fired from conventionally rifled barrels as well as from smooth bore barrels.
- Another object of the invention is to provide such a projectile which will not adversely sacrifice the operational perfonnance of the ammunition round.
- a further object of the invention is to provide such a projectile that can be fired in conventional rifled orsmoothbore weapons which do not require costly modifications.
- the ammunition projectile shown generally at has a main body 11 of conventional materials well known in the art and having a forwardly opening cavity 12 that force-fittingly receives the rearwardly extending cylindrical portion 14 of a windshield or nose penetrator member 13.
- the rearward end of the main body has a crimping groove 15 for attachment of a cartridge case, and slightly forward thereof, a rotating band 16 of a copper base material for conventional engraving by and sealing of the rifling grooves of a spin imparting gun barrel.
- Spaced longitudinally from and forward of the rotating band is a bore rider annulus 17, of similar material as and less diameter than rotating band 16, that is only partially engraved by the rifling grooves while functioning as a forward guide.
- the bore rider annulus 17 is preferably located rearwardly adjacent the conically tapered forward surface portion 18 of the main body, said conical surface being a continuation of the nose conical surface.
- annular recess 20 is provided in the peripheral surface of main body 11 between the bore rider annulus and rotating band.
- the depth of the recess is such that the ratio of diameters of the recessed peripheral surface and the main body is .765, although the permissible ratio range from .725 to .805 will provide an operationally appropriate center of pressure or pressure positioning rearwardly of the projectile center of gravity.
- the leading and trailing edges 21, 22 of the annular recess 20 preferably should be at least 30, as shown to assure proper positioning of the operational center of pressure into the recess 20 for aerodynamic stability of the smoothbore fired projectile, although these conical fillet edges 21, 22 may be of a suitable arcuate contour.
- the ratio of the total width (including edges 21, 22) of the recess 20 compared to the depth of the recess should be approximately 6.3:1 for a 22 conical nose, although a satisfactory ratio range of 5.9:1 to 6.7:1 will provide an appropriate center of pressure.
- a projectile for selective use in smoothbore and spin imparting gun barrels comprising a main body having a forwardly opening cavity at one end thereof and means at the rearward end of said body for securing a cartridge case,
- a nose penetrator member having a cylindrical portion secured in said cavity and a forwardmost conical surface portion
- said positioning means including an annular recess in the peripheral surface of said main body intermediate-said bore rider and rotating band.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Toys (AREA)
Abstract
An ammunition projectile which can be selectively fired in weapons having either a smooth bore or spin imparting gun barrel. The projectile has on the main body an annular bore rider which is longitudinally spaced forwardly of the rotating band. The peripheral surface of the main body, intermediate the bore rider and rotating band, has an annular pressure centering or positioning recess.
Description
United States Patent [1 1 Travor et al.
[ 1 Oct. 21, 1975 PROJECTILE Inventors: Bruce W. Travor, Holland, Pa;
Samuel L. Brown, Willingboro, N.J.; Brian D. Wenocur, Audubon, Pa.
The United States of America as represented by the Secretary of the Army, Washington, DC.
Filed: Dec. 19, 1973 Appl. No.: 426,270
Assignee:
US. Cl. 102/93; 102/52 Int. Cl. F42B 13/16; F42B 13/04 Field of Search 102/93, 52
References Cited UNITED STATES PATENTS 12/1937 Foulke ..l02/92.1 3/1938 Gerlich ..102/92.1
2,324,346 7/1943 Albree 244/3.1 2,998,778 9/1961 Hablutzel 102/93 3,446,147 5/1969 Engel et al 102/93 3,447,466 6/1969 Engel 102/93 Primary Examiner-Harvey E. Behrend Assistant Examiner-C. T. Jordan Attorney, Agent, or FirmNathan Edelberg; Robert P. Gibson [57] ABSTRACT An ammunition projectile which can be selectively fired in weapons having either a smooth bore or spin 3 Claims, 1 Drawing Figure US. Patent 0a. 21, 1975 Ill Llll ll lllll lr li .lllluln III. I III PROJECTILE The invention described herein may be manufactured, used, an licensed by or for the Government for governmental purposes without the payment to us of any royalty thereon.
This invention relates to projectiles, and more particularly to an ammunition projectile having a main body and an aerodynamic windshield or nose.
Since the advent of flechette type ammunition, the interchangeability of conventional type ammunition with smooth bore ammunition has been desirous.
One of the objects of the invention is to provide an ammunition projectile which can be fired from conventionally rifled barrels as well as from smooth bore barrels.
Another object of the invention is to provide such a projectile which will not adversely sacrifice the operational perfonnance of the ammunition round.
A further object of the invention is to provide such a projectile that can be fired in conventional rifled orsmoothbore weapons which do not require costly modifications.
These and other objects, features and advantages will become more apparent from the following description and accompanying drawing which is an elevational view, partially broken away in section, of a preferred ammunition projectile embodying the principles of the invention.
The ammunition projectile, shown generally at has a main body 11 of conventional materials well known in the art and having a forwardly opening cavity 12 that force-fittingly receives the rearwardly extending cylindrical portion 14 of a windshield or nose penetrator member 13. The rearward end of the main body has a crimping groove 15 for attachment of a cartridge case, and slightly forward thereof, a rotating band 16 of a copper base material for conventional engraving by and sealing of the rifling grooves of a spin imparting gun barrel. Spaced longitudinally from and forward of the rotating band is a bore rider annulus 17, of similar material as and less diameter than rotating band 16, that is only partially engraved by the rifling grooves while functioning as a forward guide. The bore rider annulus 17 is preferably located rearwardly adjacent the conically tapered forward surface portion 18 of the main body, said conical surface being a continuation of the nose conical surface.
For the purpose of selectively employing the projectile in similar sized smoothbore gun barrels wherein both the band 16 and bore rider 17 function as longitudinally spaced guides, an annular recess 20 is provided in the peripheral surface of main body 11 between the bore rider annulus and rotating band. Preferably, the depth of the recess is such that the ratio of diameters of the recessed peripheral surface and the main body is .765, although the permissible ratio range from .725 to .805 will provide an operationally appropriate center of pressure or pressure positioning rearwardly of the projectile center of gravity. The leading and trailing edges 21, 22 of the annular recess 20 preferably should be at least 30, as shown to assure proper positioning of the operational center of pressure into the recess 20 for aerodynamic stability of the smoothbore fired projectile, although these conical fillet edges 21, 22 may be of a suitable arcuate contour. Also, the ratio of the total width (including edges 21, 22) of the recess 20 compared to the depth of the recess should be approximately 6.3:1 for a 22 conical nose, although a satisfactory ratio range of 5.9:1 to 6.7:1 will provide an appropriate center of pressure.
Various modifications, alterations or changes may be resorted to without departing from the scope of the invention as defined in the appended claims.
We claim:
1. A projectile for selective use in smoothbore and spin imparting gun barrels, comprising a main body having a forwardly opening cavity at one end thereof and means at the rearward end of said body for securing a cartridge case,
a nose penetrator member having a cylindrical portion secured in said cavity and a forwardmost conical surface portion,
a rotating band secured on said main body forwardly of said cartridge securing means,
an annular bore rider on said main body and longitudinally spaced forwardly of said rotating band, said main body having a conically tapered surface portion forwardly adjacent said bore rider and defining a continuation of said nose conical surface, and
means on said main body of said projectile for positioning an operational aerodynamic center of pressure rearwardly of a center of gravity for said projectile, said positioning means including an annular recess in the peripheral surface of said main body intermediate-said bore rider and rotating band.
2. The structure according to claim 1 wherein the ratio of diameters of said recessed peripheral surface and said main body is in the range of .725 to .805.
3. The structure of claim 2 wherein said ratio is .765.
Claims (3)
1. A projectile for selective use in smoothbore and spin imparting gun barrels, comprising a main body having a forwardly opening cavity at one end thereof and means at the rearward end of said body for securing a cartridge case, a nose penetrator member having a cylindrical portion secured in said cavity and a forwardmost conical surface portion, a rotating band secured on said main body forwardly of said cartridge securing means, an annular bore rider on said main body and longitudinally spaced forwardly of said rotating band, said main body having a conically tapered surface portion forwardly adjacent said bore rider and defining a continuation of said nose conical surface, and means on said main body of said projectile for positioning an operational aerodynamic center of pressure rearwardly of a center of gravity for said projectile, said positioning means including an annular recess in the peripheral surface of said main body intermediate said bore rider and rotating band.
2. The structure according to claim 1 wherein the ratio of diameters of said recessed peripheral surface and said main body is in the range of .725 to .805.
3. The structure of claim 2 wherein said ratio is .765.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US426270A US3913489A (en) | 1973-12-19 | 1973-12-19 | Projectile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US426270A US3913489A (en) | 1973-12-19 | 1973-12-19 | Projectile |
Publications (1)
Publication Number | Publication Date |
---|---|
US3913489A true US3913489A (en) | 1975-10-21 |
Family
ID=23690084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US426270A Expired - Lifetime US3913489A (en) | 1973-12-19 | 1973-12-19 | Projectile |
Country Status (1)
Country | Link |
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US (1) | US3913489A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090308275A1 (en) * | 2008-06-11 | 2009-12-17 | Ake Nilsson | Projectile for fire arms |
US20100218696A1 (en) * | 2005-10-21 | 2010-09-02 | Marx Pj | Firearms Projectile |
US20100224095A1 (en) * | 2005-10-21 | 2010-09-09 | Liberty Ammunition, Llc | Reduced Friction Projectile |
US8857343B2 (en) | 2012-05-29 | 2014-10-14 | Liberty Ammunition, Llc | High volume multiple component projectile assembly |
US20150226531A1 (en) * | 2013-05-28 | 2015-08-13 | Ra Brands, L.L.C. | Projectile and Mold to Cast Projectile |
US10094644B2 (en) * | 2013-07-31 | 2018-10-09 | Alpha Velorum Ag | Method for increasing the range of spin-stabilized projectiles, and projectile of said type |
US11408717B2 (en) | 2020-04-29 | 2022-08-09 | Barnes Bullets, Llc | Low drag, high density core projectile |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2103155A (en) * | 1935-03-14 | 1937-12-21 | Hercules Powder Co Ltd | Projectile |
US2110264A (en) * | 1929-12-24 | 1938-03-08 | Franka Gerlich | Bullet |
US2324346A (en) * | 1941-09-05 | 1943-07-13 | Albree George Norman | Projectile for firearms |
US2998778A (en) * | 1945-08-02 | 1961-09-05 | Charles E Hablutzel | Sabot retainer |
US3446147A (en) * | 1966-03-04 | 1969-05-27 | Oerlikon Buehrle Holding Ag | Casing for the sabot of a projectile |
US3447466A (en) * | 1967-09-05 | 1969-06-03 | Oerlikon Buhrie Holding Ltd | Sabot projectile with core guiding means |
-
1973
- 1973-12-19 US US426270A patent/US3913489A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2110264A (en) * | 1929-12-24 | 1938-03-08 | Franka Gerlich | Bullet |
US2103155A (en) * | 1935-03-14 | 1937-12-21 | Hercules Powder Co Ltd | Projectile |
US2324346A (en) * | 1941-09-05 | 1943-07-13 | Albree George Norman | Projectile for firearms |
US2998778A (en) * | 1945-08-02 | 1961-09-05 | Charles E Hablutzel | Sabot retainer |
US3446147A (en) * | 1966-03-04 | 1969-05-27 | Oerlikon Buehrle Holding Ag | Casing for the sabot of a projectile |
US3447466A (en) * | 1967-09-05 | 1969-06-03 | Oerlikon Buhrie Holding Ltd | Sabot projectile with core guiding means |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100218696A1 (en) * | 2005-10-21 | 2010-09-02 | Marx Pj | Firearms Projectile |
US20100224095A1 (en) * | 2005-10-21 | 2010-09-09 | Liberty Ammunition, Llc | Reduced Friction Projectile |
US7874253B2 (en) | 2005-10-21 | 2011-01-25 | Liberty Ammunition, Llc | Firearms projectile |
US7900561B2 (en) | 2005-10-21 | 2011-03-08 | Liberty Ammunition, Llc | Reduced friction projectile |
US20090308275A1 (en) * | 2008-06-11 | 2009-12-17 | Ake Nilsson | Projectile for fire arms |
US8511233B2 (en) * | 2008-06-11 | 2013-08-20 | Norma Precision Ab | Projectile for fire arms |
US8857343B2 (en) | 2012-05-29 | 2014-10-14 | Liberty Ammunition, Llc | High volume multiple component projectile assembly |
US9470494B2 (en) | 2012-05-29 | 2016-10-18 | Liberty Ammuntion, Inc. | High volume multiple component projectile assembly |
US20150226531A1 (en) * | 2013-05-28 | 2015-08-13 | Ra Brands, L.L.C. | Projectile and Mold to Cast Projectile |
US9534876B2 (en) * | 2013-05-28 | 2017-01-03 | Ra Brands, L.L.C. | Projectile and mold to cast projectile |
US10094644B2 (en) * | 2013-07-31 | 2018-10-09 | Alpha Velorum Ag | Method for increasing the range of spin-stabilized projectiles, and projectile of said type |
US11408717B2 (en) | 2020-04-29 | 2022-08-09 | Barnes Bullets, Llc | Low drag, high density core projectile |
US11940254B2 (en) | 2020-04-29 | 2024-03-26 | Barnes Bullets, Llc | Low drag, high density core projectile |
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