US3545383A - Flechette - Google Patents
Flechette Download PDFInfo
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- US3545383A US3545383A US505392A US3545383DA US3545383A US 3545383 A US3545383 A US 3545383A US 505392 A US505392 A US 505392A US 3545383D A US3545383D A US 3545383DA US 3545383 A US3545383 A US 3545383A
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- tail
- flechette
- tip
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- flechettes
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- 239000000463 material Substances 0.000 description 14
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 6
- 229910052721 tungsten Inorganic materials 0.000 description 6
- 239000010937 tungsten Substances 0.000 description 6
- 229910052770 Uranium Inorganic materials 0.000 description 5
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 5
- 238000005304 joining Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920004142 LEXAN™ Polymers 0.000 description 2
- 239000004418 Lexan Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
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Images
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/02—Stabilising arrangements
- F42B10/04—Stabilising arrangements using fixed fins
- F42B10/06—Tail fins
- F42B10/08—Flechette-type projectiles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S102/00—Ammunition and explosives
- Y10S102/703—Flechette
Definitions
- a projectile which is formed of a relatively heavy tip section and a relatively light tail section.
- the tail section is of cruciform cross section at one end thereof and substantially conformably shaped to the cross section of the tip section at the other end thereof.
- the tip section is joined to the tail section by structure which is rupturable upon impact with a body, which rupturable structure may take the form of a short extension on one of the sections which is pressed fit within the other section or a relatively short pin extending between the sections.
- Mating flat surfaces on the tip and tail section absorb substantially greater axial force than the lateral force which can be absorbed by the rupturable structure joining the flat surfaces.
- This invention relates to a projectile to be launched by a firearm; and more particularly, this invention provides an improved flechette type projectile having a relatively heavy tip and a relatively light tail such that the flechette may be propelled as a dart or an arrow in flight.
- flechettes have been used with firearms and have proved advantageous over conventional rifle bullets or spherical shot. Since the flechette is aerodynamically stable, it will have a relatively straight flight path and will strike a target with great kinetic energy.
- a copending Pat. application Ser. No. 380,177 filed on July 3, 1964, by Donald E. Davenport entitled Finless Dart For Firearm Ammunition Projectile describes and claims a flechettehaving a cylindrical or hexagonal body which is adapted to be bundled and packaged together with other similar flechettes in a sabot as a round of ammunition.
- a flechette may be fired singly as a rifle projectile, or in other applications a plurality of flechettes may be bundled together in a sabot to be fired by a shotgun or similar weapon. Because of the sabot arrangement the launching of individual flechettes provides axial acceleration only; and without rifling grooves in the barrel of the launching weapon, the flechettes do not attain spin characteristic such as a rifle bullet would attain at launch. It is desirable that the flechette be shaped to have most stable flight characteristics preventing a fish tail or wobble movement in flight which would result in less range and less accuracy.
- the sabot holds the entire bundle intact throughout the launch within the gun barrel, but after the sabot emerges from the barrel, the wind resistance tears the sabot apart and releases the individual flechettes for separate flight. It is desirable that the flechettes remain concentrated and strike a target area in a well defined pattern. If the flechettes are not of proper design, air rushing into the sabot after launch will tend to explode a bundle of flechettes, thereby causing the various individual flechettes to diverge into a widely scattered pattern. Obviously, it is desirable to have a flechette design which is so stable as to remain in a substantially straight trajectory while the sabot is being torn away; such that the various individual flechettes will remain in a reasonably tight pattern during flight.
- a flechette is made of two membersa heavy tip and a light tail.
- the tip and the tail may be joined together by a pin extending into both members, by mating an extension formed on one of the members into a hole in the other member with a pressed fit, or by crimping one member over a portion of the other member having a slightly smaller diameter.
- the forces exerted upon the flechette are axial causing acceleration thereof.
- the forces upon the flechette are slight.
- the tail member break apart from the tip member such that the parts tend to tumble and expand kinetic energy within the target. Thus, a maximum'damage to the soft target will be effected.
- the flechette were to remain intact after impact with the target, the complete penetration of the target may result, and the flechette could go completely through the target without causing great damage thereto.
- the joint may have great strength for an armor-piercing projectile.
- FIG. 1 is a side view showing a typical configuration of one embodiment of this invention
- FIG. 3 is a side view partially in section showing an alternative embodiment
- FIG. 4 is a side view partially in section of a further embodiment of this invention.
- FIG. 5 is an enlarged detail section showing another embodiment
- a preferred embodiment of this invention includes a flechette having a relatively heavy tip member 11 and a relatively light tail member 12.
- the tip structure may be generally cylindrical except for a pointed end.
- the tail structure attached thereto includes a forward portion similarly cylindrical and of the same diameter as the tip 11, and further includes a rearward portion having a cruciform cross section.
- the cruciform cross section may be formed in the tail member by molding, or by machining from a cylindrical stock piece.
- the cruciform tail may be formed with a radius of curvature 13 or with a square shoulder 14 as shown in FIG. 3.
- the tip member 11 may be attached to the tail as shown in FIG. 3 by pressing or forcing the mating parts together.
- a copper jacket 15 may enclose a heavy substance such as powdered tungsten 16 and being crimped or otherwise pressed upon the tail structure 13 as shown at 17.
- the center of mass be located ahead of the center of pressure to stabilize the flight.
- the tip member 11 is composed of a relatively dense material as compared to the material of the tail member 12.
- the center of mass is thereby moved forwardly by the concentration of heavy material at the tip of the flechette.
- the center of pressure would be approximately at the midpoint between the ends of the flechette, and therefore, the center of pressure is definitely rearwardly of the center of mass.
- the flechette of this invention is provided with a tail structure having a cruciform cross section as shown in FIG. 2.
- This cruciform cross section may be obtained by molding the tail directly into the shape of the crucifonn; or alternatively, a cylindrical tail body may be machined to remove material from the four quadrants about the longitudinal axis of the flechette.
- the cruciform shape effectively provides aerodynamic surfaces extending outwardly which function similarly to flanges or the tail structure of an arrow.
- the maximum dimensions across the cruciform section are not greater than the diameter of the cylindrical portions of the tip 11 and the tail 12. Therefore, the flechettes in accordance with this invention may be packed tightly within a sabot. It has been found experimentally that the cruciform shaped tail tends to extend the center of pressure further rearwardly thereby separating the center of gravity further from the center of pressure and increasing the stability of the projectile.
- the tip member of the flechette is of a relatively dense or heavy material as compared to the material of the tail member.
- Fleche'ttes have been made and successfully launched wherein the material for the tips has been of 1) steel, (2) lead, (3) tungsten and (4) uranium. Obviously, steel and lead are plentiful materials, easily workable and may be useful as flechette tips. Tungsten is a good material for armor piercing applications. It is anticipated that the tungsten may be used for flechettes in powdered form which would otherwise be scrap material.
- the powdered tungsten 16 is encased in a copper jacket 15 which is crimped to the tail structure 12 of the flechette.
- the forward portion of the tail structure 12 may be machined or otherwise formed to a reduced diameter at point of crimping 17.
- the powdered tungsten 16 may be mixed with an epoxy binder to provide a more easily workable mass.
- Uranium is a material having ,a very great density, and therefore, uranium would be most useful in the manufacture of flechette tip members. Indeed, spent uranium from which the U-235 product has been removed, is a very inexpensive material since it is a useless byproduct of the atomic energy facilities. Uranium is easily workable and formed, and therefore, has good promise in the manufacture of flechette tips.
- the tail members 12-12 may be made from comparative light materials of low densities such as (1) magnesium, (2) aluminum, (3) lexan plastic and (4) nylon. Each of these materials is of comparative low density, and is easily formed into desired shaped by molding, machining, or otherwise.
- the cross section tail may be a metal such as magnesium or aluminum while the structure of FIG. 4 shows in cross section a plastic tail which may be lexan or nylon.
- the cruciform tail assembly can be made by a machining process.
- the machine tool may have a radius corresponding to the curvature 13 wherein the cruciform rearward portion of the tail changes to a cylindrical forward portion thereof. In order instances the cruciform rearward section is joined to the forward cylindrical portion of the tail by an abrupt shoulder or step 14.
- Both types of flechettes have been made and tested with a considerable degree of success, and at this time it is not possible to state which of the embodiments, FIG. 1 or FIG. 3 is superior.
- Flechettes of both types have been launched both at supersonic speeds and at subsonic speeds and both have proved to be successful.
- FIG. 3 shows a tail structure and tip structure having mating parts which are forced together in a pressed fit.
- the assembly of FIG. 4 shows the use of a copper jacket over the tip structure which is crimped to the tail structure thereby joining the tip to the tail.
- FIG. illustrates a third method for joining the tip to the tail by drilling a small hole in each member and inserting a roll pin 18 therein. As shown in FIG. 6, the roll pin 18 acts as a spring wedging itself into the cavity, and therefore, the diameter of the drilled hole need not be of high precision.
- a flechette is assembled which will not break or separate due to the launching forces.
- a flechette comprising:
- a tip portion having a pointed forward end and a flat rear surface
- tail portion having a flat forward surface and a cruciform cross section extending from the trailing end for wardly for a substantial portion of the length of said tail portion;
- c. means releasably joining said tip and tail portions with said flat surfaces in facing engagement, whereby axial forces are transmitted through said facing fiat surfaces, said last-named means being adapted to allow separation of said tip and tail portions upon striking a target.
- said lastnamed means comprises a roll pin frictionally engaging the internal surface of openings extending into each of said tip and tail portions through said flat surfaces thereof.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Vibration Dampers (AREA)
Description
United States Patent [72] Inventor Carl F. Lucy Mountain View, California 211 AppLNo. 505,392 [22] Filed Oct. 27, 1965 [45] Patented Dec. 8, 1970 [73] Assignee Singer General Precision, Inc.
a corporation of Delaware [54] FLECHE'I'IE 3 Claims, 6 Drawing Figs.
[52] U.S.CI l02/92.6 [51] Int.CI F42bl1/00 [50] FieldofSearch 102/38, 92.5, 52, 92.1-92.7, 93, 64. (FL); 89/14 [56] References Cited UNITED STATES PATENTS 34,285 1/1862 Mefford 102/92.5 354,376 12/1886 Bennett..... 102/92.2 355,653 1/1887 Loyd l02/92.5 3,311,061 3/1967 Roehrdanz 102/93 3,344,711 10/1967 Mawhinneyetal 89/14 FOREIGN PATENTS 978,435 12/1964 GreatBritain 102/64 462,031 11/1913 France l02/92.5
Machinery s Handbook, 17th ed., 1964, page 1890 Primary Examiner-Robert F. Stahl Attorneys-Edward A. Robinson, Francis L. Masselle and William Grobman ABSTRACT: A projectile is disclosed which is formed of a relatively heavy tip section and a relatively light tail section. The tail section is of cruciform cross section at one end thereof and substantially conformably shaped to the cross section of the tip section at the other end thereof. The tip section is joined to the tail section by structure which is rupturable upon impact with a body, which rupturable structure may take the form of a short extension on one of the sections which is pressed fit within the other section or a relatively short pin extending between the sections. Mating flat surfaces on the tip and tail section absorb substantially greater axial force than the lateral force which can be absorbed by the rupturable structure joining the flat surfaces.
PATENTED DEC 8 I970 4 FIG. I
' FIG. 2
l4) "P FIG.3 W
FIG. 6
INVENTOR.
CARL F. LUCY Affomey FLECHETTE This invention relates to a projectile to be launched by a firearm; and more particularly, this invention provides an improved flechette type projectile having a relatively heavy tip and a relatively light tail such that the flechette may be propelled as a dart or an arrow in flight.
Heretofore, flechettes have been used with firearms and have proved advantageous over conventional rifle bullets or spherical shot. Since the flechette is aerodynamically stable, it will have a relatively straight flight path and will strike a target with great kinetic energy. A copending Pat. application Ser. No. 380,177 filed on July 3, 1964, by Donald E. Davenport entitled Finless Dart For Firearm Ammunition Projectile describes and claims a flechettehaving a cylindrical or hexagonal body which is adapted to be bundled and packaged together with other similar flechettes in a sabot as a round of ammunition.
A flechette may be fired singly as a rifle projectile, or in other applications a plurality of flechettes may be bundled together in a sabot to be fired by a shotgun or similar weapon. Because of the sabot arrangement the launching of individual flechettes provides axial acceleration only; and without rifling grooves in the barrel of the launching weapon, the flechettes do not attain spin characteristic such as a rifle bullet would attain at launch. It is desirable that the flechette be shaped to have most stable flight characteristics preventing a fish tail or wobble movement in flight which would result in less range and less accuracy.
If the flechettes are fired in bundles within a sabot, the sabot holds the entire bundle intact throughout the launch within the gun barrel, but after the sabot emerges from the barrel, the wind resistance tears the sabot apart and releases the individual flechettes for separate flight. It is desirable that the flechettes remain concentrated and strike a target area in a well defined pattern. If the flechettes are not of proper design, air rushing into the sabot after launch will tend to explode a bundle of flechettes, thereby causing the various individual flechettes to diverge into a widely scattered pattern. Obviously, it is desirable to have a flechette design which is so stable as to remain in a substantially straight trajectory while the sabot is being torn away; such that the various individual flechettes will remain in a reasonably tight pattern during flight.
As indicated heretofore, a flechette is made of two membersa heavy tip and a light tail. The tip and the tail may be joined together by a pin extending into both members, by mating an extension formed on one of the members into a hole in the other member with a pressed fit, or by crimping one member over a portion of the other member having a slightly smaller diameter. During the launch, the forces exerted upon the flechette are axial causing acceleration thereof. After launch and during flight, the forces upon the flechette are slight. Upon impact with a soft target, it is considered desirable that the tail member break apart from the tip member such that the parts tend to tumble and expand kinetic energy within the target. Thus, a maximum'damage to the soft target will be effected. Obviously, if the flechette were to remain intact after impact with the target, the complete penetration of the target may result, and the flechette could go completely through the target without causing great damage thereto. n the other hand, the joint may have great strength for an armor-piercing projectile.
It is an object of this invention to provide an improved flechette which is aerodynamically more stable than any prior design.
It is a further object of this invention to provide an improved flechette having a relatively heavy tip and a relatively light tail being formed to provide aerodynamic stability for the flechette and which may be attached to the tip for stability during flight, but will be relatively weak upon impact with a target to effect a maximum damage thereto.
Numerous other objects and advantages will be apparent throughout the progress of the specification which follows. The accompanying drawings illustrate a certain exemplary embodiment of the invention and the views therein are as follows:
FIG. 1 is a side view showing a typical configuration of one embodiment of this invention;
FIG. 2 is a sectional view along the plane 2-2 of HG. I showing the cruciform tail section of this flechette;
FIG. 3 is a side view partially in section showing an alternative embodiment; and
FIG. 4 is a side view partially in section of a further embodiment of this invention;
FIG. 5 is an enlarged detail section showing another embodiment; and
FIG. 6 is a section along the plane 6-6 of FIG. 5.
Briefly stated, a preferred embodiment of this invention includes a flechette having a relatively heavy tip member 11 and a relatively light tail member 12. The tip structure may be generally cylindrical except for a pointed end. The tail structure attached thereto includes a forward portion similarly cylindrical and of the same diameter as the tip 11, and further includes a rearward portion having a cruciform cross section. The cruciform cross section may be formed in the tail member by molding, or by machining from a cylindrical stock piece. The cruciform tail may be formed with a radius of curvature 13 or with a square shoulder 14 as shown in FIG. 3. The tip member 11 may be attached to the tail as shown in FIG. 3 by pressing or forcing the mating parts together. In the embodiment of FIG. 4, a copper jacket 15 may enclose a heavy substance such as powdered tungsten 16 and being crimped or otherwise pressed upon the tail structure 13 as shown at 17.
As indicated in the copending US. Pat. application Ser. No. 380,177, supra it is necessary that the center of mass be located ahead of the center of pressure to stabilize the flight. In the structure shown in FIGS. 1, 3 and 4 the tip member 11 is composed of a relatively dense material as compared to the material of the tail member 12. The center of mass is thereby moved forwardly by the concentration of heavy material at the tip of the flechette. Ordinarily, the center of pressure would be approximately at the midpoint between the ends of the flechette, and therefore, the center of pressure is definitely rearwardly of the center of mass. The flechette of this invention is provided with a tail structure having a cruciform cross section as shown in FIG. 2. This cruciform cross section may be obtained by molding the tail directly into the shape of the crucifonn; or alternatively, a cylindrical tail body may be machined to remove material from the four quadrants about the longitudinal axis of the flechette. The cruciform shape effectively provides aerodynamic surfaces extending outwardly which function similarly to flanges or the tail structure of an arrow. However, the maximum dimensions across the cruciform section are not greater than the diameter of the cylindrical portions of the tip 11 and the tail 12. Therefore, the flechettes in accordance with this invention may be packed tightly within a sabot. It has been found experimentally that the cruciform shaped tail tends to extend the center of pressure further rearwardly thereby separating the center of gravity further from the center of pressure and increasing the stability of the projectile.
As indicated heretofore, the tip member of the flechette is of a relatively dense or heavy material as compared to the material of the tail member. Fleche'ttes have been made and successfully launched wherein the material for the tips has been of 1) steel, (2) lead, (3) tungsten and (4) uranium. Obviously, steel and lead are plentiful materials, easily workable and may be useful as flechette tips. Tungsten is a good material for armor piercing applications. It is anticipated that the tungsten may be used for flechettes in powdered form which would otherwise be scrap material. As shown in FIG. 4, the powdered tungsten 16 is encased in a copper jacket 15 which is crimped to the tail structure 12 of the flechette. As shown in FIG. 4, the forward portion of the tail structure 12 may be machined or otherwise formed to a reduced diameter at point of crimping 17. The powdered tungsten 16 may be mixed with an epoxy binder to provide a more easily workable mass.
Uranium is a material having ,a very great density, and therefore, uranium would be most useful in the manufacture of flechette tip members. Indeed, spent uranium from which the U-235 product has been removed, is a very inexpensive material since it is a useless byproduct of the atomic energy facilities. Uranium is easily workable and formed, and therefore, has good promise in the manufacture of flechette tips.
The tail members 12-12 may be made from comparative light materials of low densities such as (1) magnesium, (2) aluminum, (3) lexan plastic and (4) nylon. Each of these materials is of comparative low density, and is easily formed into desired shaped by molding, machining, or otherwise. As shown in FIG. 3, the cross section tail may be a metal such as magnesium or aluminum while the structure of FIG. 4 shows in cross section a plastic tail which may be lexan or nylon.
The cruciform tail assembly can be made by a machining process. The machine tool may have a radius corresponding to the curvature 13 wherein the cruciform rearward portion of the tail changes to a cylindrical forward portion thereof. In order instances the cruciform rearward section is joined to the forward cylindrical portion of the tail by an abrupt shoulder or step 14. Both types of flechettes have been made and tested with a considerable degree of success, and at this time it is not possible to state which of the embodiments, FIG. 1 or FIG. 3 is superior. Flechettes of both types have been launched both at supersonic speeds and at subsonic speeds and both have proved to be successful.
The assembly of FIG. 3 shows a tail structure and tip structure having mating parts which are forced together in a pressed fit. The assembly of FIG. 4 shows the use of a copper jacket over the tip structure which is crimped to the tail structure thereby joining the tip to the tail. FIG. illustrates a third method for joining the tip to the tail by drilling a small hole in each member and inserting a roll pin 18 therein. As shown in FIG. 6, the roll pin 18 acts as a spring wedging itself into the cavity, and therefore, the diameter of the drilled hole need not be of high precision. In each of the methods shown for securing the tip structure to the tail structure, a flechette is assembled which will not break or separate due to the launching forces. The launching forces are exerted longitudinally against the flechette which may be tightly packed sabot with other flechettes. The longitudinal force exerted in launching does not particularly stress the joint between the tip 11 and the tail 12. During flight, there are no particular forces exerted tending to separate the flechette which will then have good aerodynamic stability. Upon impact, any of the various joints shown in FIGS. 3, 4 or 6 may or may not break apart such that the flechette tip and tail will tumble and expend its kinetic energy in soft targets, or such that the flechette will remain intact for piercing hard targets.
1 claim:
1. A flechette comprising:
a. a tip portion having a pointed forward end and a flat rear surface;
b. a tail portion having a flat forward surface and a cruciform cross section extending from the trailing end for wardly for a substantial portion of the length of said tail portion; and
c. means releasably joining said tip and tail portions with said flat surfaces in facing engagement, whereby axial forces are transmitted through said facing fiat surfaces, said last-named means being adapted to allow separation of said tip and tail portions upon striking a target.
2. The invention according to claim 1 wherein said lastnamed means comprises a roll pin frictionally engaging the internal surface of openings extending into each of said tip and tail portions through said flat surfaces thereof.
3. The invention according to claim 1 wherein said tail por tion is at least as long as said tip portion and said cruciform cross section extends forwardly at least half the length of said tail portion.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US50539265A | 1965-10-27 | 1965-10-27 |
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Publication Number | Publication Date |
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US3545383A true US3545383A (en) | 1970-12-08 |
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ID=24010116
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Application Number | Title | Priority Date | Filing Date |
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US505392A Expired - Lifetime US3545383A (en) | 1965-10-27 | 1965-10-27 | Flechette |
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US (1) | US3545383A (en) |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2256393A1 (en) * | 1973-12-28 | 1975-07-25 | Pulsepower Systems | |
US4382411A (en) * | 1981-02-02 | 1983-05-10 | The United States Of America As Represented By The Secretary Of The Army | Self aligning expansible sabot projectile for worn gun tubes |
US4597333A (en) * | 1983-07-08 | 1986-07-01 | Rheinmetall G.M.B.H. | Two-part armor-piercing projectile |
US4708064A (en) * | 1977-09-29 | 1987-11-24 | Rheinmetall Gmbh | Impact projectile |
US4716834A (en) * | 1980-03-27 | 1988-01-05 | Rheinmetall Gmbh | Inertial penetrator projectile |
US4788915A (en) * | 1986-06-05 | 1988-12-06 | Sauvestre Jean Claude | Hunting ammunition comprising a bullet of increased effectiveness |
US4805535A (en) * | 1987-05-13 | 1989-02-21 | Marcon Robert V | Projectile |
EP0270781A3 (en) * | 1986-12-11 | 1989-12-06 | Pyrotechnische Fabrik F. Feistel Gmbh + Co Kg | Training ammunition |
FR2664039A1 (en) * | 1990-07-02 | 1992-01-03 | Sauvestre Jean Claude | ORGANIC-METAL MIXED ALLOYS FOR PRODUCING PROJECTILES. |
US5719352A (en) * | 1993-04-22 | 1998-02-17 | The Kent Cartridge Manufacturing Co. Limited | Low toxicity shot pellets |
US5877437A (en) * | 1992-04-29 | 1999-03-02 | Oltrogge; Victor C. | High density projectile |
US5939662A (en) * | 1997-12-03 | 1999-08-17 | Raytheon Company | Missile warhead design |
US20040055502A1 (en) * | 2002-09-20 | 2004-03-25 | Lockheed Martin Corporation | Penetrator and method for using same |
US20040055501A1 (en) * | 2002-09-20 | 2004-03-25 | Hunn David L. | Penetrator and method for using same |
WO2004027341A1 (en) * | 2002-09-20 | 2004-04-01 | Lockheed Martin Corporation | A penetrator and method for using same |
US20060048666A1 (en) * | 2002-11-20 | 2006-03-09 | Radchenko Mihail Y | Method for producing a bullet, bullet produced according to said method and ammunition provided with said bullet |
US20070157843A1 (en) * | 2005-09-30 | 2007-07-12 | Roemerman Steven D | Small smart weapon and weapon system employing the same |
US20090078146A1 (en) * | 2003-05-08 | 2009-03-26 | Joseph Edward Tepera | Weapon and weapon system employing the same |
US7895946B2 (en) | 2005-09-30 | 2011-03-01 | Lone Star Ip Holdings, Lp | Small smart weapon and weapon system employing the same |
US20110214582A1 (en) * | 2010-03-04 | 2011-09-08 | Glasser Alan Z | High velocity ammunition round |
US20110252997A1 (en) * | 2010-04-14 | 2011-10-20 | Jeff Hoffman | Armor-penetrating two-part bullet |
US8117955B2 (en) | 2006-10-26 | 2012-02-21 | Lone Star Ip Holdings, Lp | Weapon interface system and delivery platform employing the same |
RU2462685C1 (en) * | 2011-02-15 | 2012-09-27 | Николай Евгеньевич Староверов | Multielement cartridge of staroverov (versions) |
US8291828B2 (en) | 2010-03-04 | 2012-10-23 | Glasser Alan Z | High velocity ammunition round |
US20130036933A1 (en) * | 2010-03-18 | 2013-02-14 | BAE Sytems Bofors AB | Method for packing fin-stabilized penetrators in a carrier shell |
US8375860B2 (en) | 2010-05-05 | 2013-02-19 | The United States Of America As Represented By The Secretary Of The Army | Stackable, easily packaged and aerodynamically stable flechette |
US8499694B2 (en) | 2011-05-04 | 2013-08-06 | The United States Of America As Represented By The Secretary Of The Army | Two-fin stackable flechette having two-piece construction |
US8541724B2 (en) | 2006-09-29 | 2013-09-24 | Lone Star Ip Holdings, Lp | Small smart weapon and weapon system employing the same |
US8661980B1 (en) | 2003-05-08 | 2014-03-04 | Lone Star Ip Holdings, Lp | Weapon and weapon system employing the same |
US8985026B2 (en) | 2011-11-22 | 2015-03-24 | Alliant Techsystems Inc. | Penetrator round assembly |
US9068803B2 (en) | 2011-04-19 | 2015-06-30 | Lone Star Ip Holdings, Lp | Weapon and weapon system employing the same |
US11274908B2 (en) * | 2018-12-04 | 2022-03-15 | The United States of America as represented by the Federal Bureau of Investigation, Department of Justice | Penetrator projectile for explosive device neutralization |
US20230332875A1 (en) * | 2020-06-24 | 2023-10-19 | Rheinmetall Waffe Munition Gmbh | Penetrator, use of a penetrator, and projectile |
-
1965
- 1965-10-27 US US505392A patent/US3545383A/en not_active Expired - Lifetime
Cited By (56)
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FR2256393A1 (en) * | 1973-12-28 | 1975-07-25 | Pulsepower Systems | |
US4708064A (en) * | 1977-09-29 | 1987-11-24 | Rheinmetall Gmbh | Impact projectile |
US4716834A (en) * | 1980-03-27 | 1988-01-05 | Rheinmetall Gmbh | Inertial penetrator projectile |
US4382411A (en) * | 1981-02-02 | 1983-05-10 | The United States Of America As Represented By The Secretary Of The Army | Self aligning expansible sabot projectile for worn gun tubes |
US4597333A (en) * | 1983-07-08 | 1986-07-01 | Rheinmetall G.M.B.H. | Two-part armor-piercing projectile |
US4788915A (en) * | 1986-06-05 | 1988-12-06 | Sauvestre Jean Claude | Hunting ammunition comprising a bullet of increased effectiveness |
EP0270781A3 (en) * | 1986-12-11 | 1989-12-06 | Pyrotechnische Fabrik F. Feistel Gmbh + Co Kg | Training ammunition |
US4805535A (en) * | 1987-05-13 | 1989-02-21 | Marcon Robert V | Projectile |
FR2664039A1 (en) * | 1990-07-02 | 1992-01-03 | Sauvestre Jean Claude | ORGANIC-METAL MIXED ALLOYS FOR PRODUCING PROJECTILES. |
WO1992000499A1 (en) * | 1990-07-02 | 1992-01-09 | Sauvestre Jean Claude | Mixed organic/metallic alloys for making projectiles |
US5877437A (en) * | 1992-04-29 | 1999-03-02 | Oltrogge; Victor C. | High density projectile |
US5719352A (en) * | 1993-04-22 | 1998-02-17 | The Kent Cartridge Manufacturing Co. Limited | Low toxicity shot pellets |
US5939662A (en) * | 1997-12-03 | 1999-08-17 | Raytheon Company | Missile warhead design |
US20040055502A1 (en) * | 2002-09-20 | 2004-03-25 | Lockheed Martin Corporation | Penetrator and method for using same |
US20040055501A1 (en) * | 2002-09-20 | 2004-03-25 | Hunn David L. | Penetrator and method for using same |
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US20080127850A1 (en) * | 2002-11-20 | 2008-06-05 | Radchenko Mikhail Y | Bullet with aerodynamic fins and ammunition using same |
US20060048666A1 (en) * | 2002-11-20 | 2006-03-09 | Radchenko Mihail Y | Method for producing a bullet, bullet produced according to said method and ammunition provided with said bullet |
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US20070157843A1 (en) * | 2005-09-30 | 2007-07-12 | Roemerman Steven D | Small smart weapon and weapon system employing the same |
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US9550568B2 (en) | 2006-10-26 | 2017-01-24 | Lone Star Ip Holdings, Lp | Weapon interface system and delivery platform employing the same |
US10029791B2 (en) | 2006-10-26 | 2018-07-24 | Lone Star Ip Holdings, Lp | Weapon interface system and delivery platform employing the same |
US8516938B2 (en) | 2006-10-26 | 2013-08-27 | Lone Star Ip Holdings, Lp | Weapon interface system and delivery platform employing the same |
US8117955B2 (en) | 2006-10-26 | 2012-02-21 | Lone Star Ip Holdings, Lp | Weapon interface system and delivery platform employing the same |
US8096243B2 (en) * | 2010-03-04 | 2012-01-17 | Glasser Alan Z | High velocity ammunition round |
US8291828B2 (en) | 2010-03-04 | 2012-10-23 | Glasser Alan Z | High velocity ammunition round |
US20110214582A1 (en) * | 2010-03-04 | 2011-09-08 | Glasser Alan Z | High velocity ammunition round |
US8915189B2 (en) * | 2010-03-18 | 2014-12-23 | Bae Systems Bofors Ab | Method for packing fin-stabilized penetrators in a carrier shell |
US20150068424A1 (en) * | 2010-03-18 | 2015-03-12 | Bae Systems Bofors Ab | Method for packing fin-stabilized penetrators in a carrier shell |
US9140529B2 (en) * | 2010-03-18 | 2015-09-22 | Bae Systems Bofors Ab | Fin-stabilized penetrators arranged in a carrier shell |
US20130036933A1 (en) * | 2010-03-18 | 2013-02-14 | BAE Sytems Bofors AB | Method for packing fin-stabilized penetrators in a carrier shell |
US20110252997A1 (en) * | 2010-04-14 | 2011-10-20 | Jeff Hoffman | Armor-penetrating two-part bullet |
US8375860B2 (en) | 2010-05-05 | 2013-02-19 | The United States Of America As Represented By The Secretary Of The Army | Stackable, easily packaged and aerodynamically stable flechette |
RU2462685C1 (en) * | 2011-02-15 | 2012-09-27 | Николай Евгеньевич Староверов | Multielement cartridge of staroverov (versions) |
US9068803B2 (en) | 2011-04-19 | 2015-06-30 | Lone Star Ip Holdings, Lp | Weapon and weapon system employing the same |
US8499694B2 (en) | 2011-05-04 | 2013-08-06 | The United States Of America As Represented By The Secretary Of The Army | Two-fin stackable flechette having two-piece construction |
US8985026B2 (en) | 2011-11-22 | 2015-03-24 | Alliant Techsystems Inc. | Penetrator round assembly |
US11274908B2 (en) * | 2018-12-04 | 2022-03-15 | The United States of America as represented by the Federal Bureau of Investigation, Department of Justice | Penetrator projectile for explosive device neutralization |
US20230332875A1 (en) * | 2020-06-24 | 2023-10-19 | Rheinmetall Waffe Munition Gmbh | Penetrator, use of a penetrator, and projectile |
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