US20040011236A1 - Penetrator arrow projectile - Google Patents
Penetrator arrow projectile Download PDFInfo
- Publication number
- US20040011236A1 US20040011236A1 US10/381,760 US38176003A US2004011236A1 US 20040011236 A1 US20040011236 A1 US 20040011236A1 US 38176003 A US38176003 A US 38176003A US 2004011236 A1 US2004011236 A1 US 2004011236A1
- Authority
- US
- United States
- Prior art keywords
- projectile
- arrow
- charge
- bleed
- launcher
- 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.)
- Abandoned
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Classifications
-
- 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
- F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
- F42B10/38—Range-increasing arrangements
- F42B10/40—Range-increasing arrangements with combustion of a slow-burning charge, e.g. fumers, base-bleed projectiles
Definitions
- the present invention relates to a so-called penetrator arrow projectile, i.e. a slim projectile, which constitutes a penetrator, for launching by use of a launcher projectile which comprises a propellant charge and which may be separated from the arrow projectile in the trajectory.
- a so-called penetrator arrow projectile i.e. a slim projectile, which constitutes a penetrator, for launching by use of a launcher projectile which comprises a propellant charge and which may be separated from the arrow projectile in the trajectory.
- DE 4018385 shows a subcalibre practice projectile having a liner in the form of a forward disc and a rearward cone, whereby the disc and the cone guide the projectile in the weapon tube.
- the disc also constitutes a seal for the propellant gases in the weapon tube, and it is divivible and releases in the trajectory of the projectile, while the cone shall accompany the projectile and decrease the braking effect caused by the air, and a so-called “base-bleed” charge is situated rearwardmost on the cone, in order to emit a gas which reduces the drag on the projectile caused by the underpressure and the formation of a vortex behind the cone.
- the “base-bleed” charge which is ignited during the launching and burns while the projectile is in the trajectory, develops a gas which mainly shall only “fill” the region behind the cone in order to reduce the underpressure and the vortex formation, and has little or no effect as propellant charge.
- the projectile according to the invention is characterized in that a “base-bleed” charge is situated rearwardmost on the arrow projectile, in order to be ignited by means of an igniter device in connection with the separation from the launcher projectile.
- the arrow projectile is slim compared with the launcher projectile, and has a small air resistance, and the velocity in the trajectory is also maintained by the “base-bleed” charge which burns and emits a gas. Thereby is achieved a large impact velocity and increased range.
- the “base-bleed” charge is not ignited during the launching, because this would have a small effect as long as the launcher projectile propels the arrow projectile.
- the launcher projectile ceases to act as propellant projectile, the launcher projectile is released, and the slimmer arrow projectile continues in the trajectory while the “base-bleed” charge burns.
- a rocket motor can be used as launcher projectile.
- the separation between the two projectiles may actuate an igniter device for the “base-bleed” charge, but ignition may also be achieved in another manner, for instance by timing relatively to the moment of launching.
- the igniter device may be situated in the launcher projectile.
- FIG. 1 shows an embodiment of the rear end of the arrow projectile according to the invention.
- FIG. 2 shows another embodiment of the rear end of the arrow projectile.
- FIG. 3 shows an arrow projectile
- FIG. 4 shows the forward end of a rocket motor, carrying an arrow projectile.
- a “base-bleed” charge 2 which can develop a gas by combustion.
- a cavity Along the center of the charge 2 is a cavity, and the charge is adapted to burn radially outwardly from the cavity.
- a charge may be used which burn from the rear end or a charge with both types of combustion.
- an igniter 3 In order to ignite the charge at a specific point of time after the launching an igniter 3 is mounted, shown coupled to a wire which transmits an ignition signal from for instance an electronic unit in the forward part of the projectile.
- a mechanical igniter device may also be used.
- the igniter device may be mounted in a rocket motor used as launcher projectile for the arrow projectile.
- FIG. 1 In a rear plate 7 is in FIG. 1 shown a gasket 4 and a nozzle 5 mounted centrally, while FIG. 2 shows two gaskets 4 and two nozzles 5 diametrically opposite. Of course, a plurality of such gaskets and nozzled may be distributed along a circle or with another distribution.
- the gaskets protect the “base-bleed” charge against influence from for instance humidity in the air during storing.
- FIG. 2 shows a sensor 12 on the outside of the rear plate 7 , for possible communication and guidance. This sensor has no connection with the “base-bleed” function.
- the “base-bleed” charge is shown in a cavity in the arrow projectile.
- the “base-bleed” charge may also be mounted in a separate unit which can be mounted on the rear end of the arrow projectile.
- FIG. 3 shows an arrow projectile according to the invention, with tail fins 11 . These may for instance be in a number of four, distributed with a spacing of 90°.
- FIG. 4 shows the forward end of a rocket motor 8 , which acts according to known principles and which is not explained more detailed.
- the rocket motor is ignited in a weapon and accelerates itself and the arrow projectile being coupled to the forward end of the motor 8 , until the motor burns out and is released from the arrow projectile 1 .
- a retainer 9 for the arrow projectile 1 At the front of the motor 8 is a retainer 9 for the arrow projectile 1 .
- the arrow projectile has rear fins 11 , which may be distributed with 90° and are inserted in grooves in a nose portion 10 of the motor 8 .
- the projectile shown is a subcalibre relatively to the rocket motor or another launcher projectile used.
Abstract
A penetrator arrow projectile for launching by use of a launcher projectile which comprises a propellant charge and which may be separated from the arrow projectile in the trajectory. A “base-bleed” charge (2) is situated rearwardmost on the arrow projectile (1), in order to be ignited by means of an igniter device (3) in connection with the separation from the launcher projectile, which may comprise a forward igniter device for igniting the “base-bleed” charge (2). The launcher projectile may also comprise a mechanism for retaining the arrow projectile (1) on the forward end and for releasing the arrow projectile in the trajectory.
Description
- The present invention relates to a so-called penetrator arrow projectile, i.e. a slim projectile, which constitutes a penetrator, for launching by use of a launcher projectile which comprises a propellant charge and which may be separated from the arrow projectile in the trajectory.
- It is known to launch such arrow projectiles from a gun, the projectile being a subcalibre relatively to the weapon tube being used, in that a divisible liner is mounted on the projectile and constitutes a thrust surface during the launching. The liner separates from the projectile in the trajectory, and the projectile continues towards the target alone. The projectile is used to penetrate a target, i.e. to enter into and damage the target, which for instance may be an armoured vehicle or a helicopter.
- DE 4018385 shows a subcalibre practice projectile having a liner in the form of a forward disc and a rearward cone, whereby the disc and the cone guide the projectile in the weapon tube. The disc also constitutes a seal for the propellant gases in the weapon tube, and it is divivible and releases in the trajectory of the projectile, while the cone shall accompany the projectile and decrease the braking effect caused by the air, and a so-called “base-bleed” charge is situated rearwardmost on the cone, in order to emit a gas which reduces the drag on the projectile caused by the underpressure and the formation of a vortex behind the cone. The “base-bleed” charge, which is ignited during the launching and burns while the projectile is in the trajectory, develops a gas which mainly shall only “fill” the region behind the cone in order to reduce the underpressure and the vortex formation, and has little or no effect as propellant charge.
- The projectile according to the invention is characterized in that a “base-bleed” charge is situated rearwardmost on the arrow projectile, in order to be ignited by means of an igniter device in connection with the separation from the launcher projectile.
- The arrow projectile is slim compared with the launcher projectile, and has a small air resistance, and the velocity in the trajectory is also maintained by the “base-bleed” charge which burns and emits a gas. Thereby is achieved a large impact velocity and increased range.
- Thus, the “base-bleed” charge is not ignited during the launching, because this would have a small effect as long as the launcher projectile propels the arrow projectile. When the launcher projectile ceases to act as propellant projectile, the launcher projectile is released, and the slimmer arrow projectile continues in the trajectory while the “base-bleed” charge burns.
- A rocket motor can be used as launcher projectile.
- The separation between the two projectiles may actuate an igniter device for the “base-bleed” charge, but ignition may also be achieved in another manner, for instance by timing relatively to the moment of launching. The igniter device may be situated in the launcher projectile.
- The invention will in the following be explained more detailed by means of examples, shown on the accompanying drawing.
- FIG. 1 shows an embodiment of the rear end of the arrow projectile according to the invention.
- FIG. 2 shows another embodiment of the rear end of the arrow projectile.
- FIG. 3 shows an arrow projectile.
- FIG. 4 shows the forward end of a rocket motor, carrying an arrow projectile.
- In the rear end of an
arrow projectile 1 shown in the FIGS. 1 and 2 is mounted a “base-bleed”charge 2, which can develop a gas by combustion. Along the center of thecharge 2 is a cavity, and the charge is adapted to burn radially outwardly from the cavity. Alternatively a charge may be used which burn from the rear end or a charge with both types of combustion. - In order to ignite the charge at a specific point of time after the launching an
igniter 3 is mounted, shown coupled to a wire which transmits an ignition signal from for instance an electronic unit in the forward part of the projectile. A mechanical igniter device may also be used. Optionally the igniter device may be mounted in a rocket motor used as launcher projectile for the arrow projectile. - In a
rear plate 7 is in FIG. 1 shown agasket 4 and anozzle 5 mounted centrally, while FIG. 2 shows twogaskets 4 and twonozzles 5 diametrically opposite. Of course, a plurality of such gaskets and nozzled may be distributed along a circle or with another distribution. The gaskets protect the “base-bleed” charge against influence from for instance humidity in the air during storing. Moreover, FIG. 2 shows a sensor 12 on the outside of therear plate 7, for possible communication and guidance. This sensor has no connection with the “base-bleed” function. - During the combustion of the charge is developed a hot gas, which flows out through the
rear plate 7. The gas builds up and maintains a pressure behind the projectile, whereby the braking effect (“drag”) of the air is reduced, and the projectile will maintain its velocity to a larger degree than a projectile without such “base-bleed”. - In the FIGS. 1 and 2 the “base-bleed” charge is shown in a cavity in the arrow projectile. The “base-bleed” charge may also be mounted in a separate unit which can be mounted on the rear end of the arrow projectile.
- FIG. 3 shows an arrow projectile according to the invention, with
tail fins 11. These may for instance be in a number of four, distributed with a spacing of 90°. - FIG. 4 shows the forward end of a
rocket motor 8, which acts according to known principles and which is not explained more detailed. The rocket motor is ignited in a weapon and accelerates itself and the arrow projectile being coupled to the forward end of themotor 8, until the motor burns out and is released from thearrow projectile 1. At the front of themotor 8 is a retainer 9 for thearrow projectile 1. In the embodiment shown the arrow projectile hasrear fins 11, which may be distributed with 90° and are inserted in grooves in anose portion 10 of themotor 8. The projectile shown is a subcalibre relatively to the rocket motor or another launcher projectile used.
Claims (3)
1. A penetrator arrow projectile for launching by use of a launcher projectile which comprises a propellant charge and which may be separated from the arrow projectile in the trajectory, and a “base-bleed” charge (2) situated rearwardmost on the arrow projectile (1), in order to be ignited by means of an igniter device (3) in connection with the separation from the launcher projectile (8).
2. A penetrator arrow projectile as claimed in claim 1 , comprising an electronic unit coupled to the igniter device, for controlling the ignition.
3. A penetrator arrow projectile as claimed in claim 1 , on which the “base-bleed” charge is situated in a separate unit coupled to the remainder of the projectile.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20004927 | 2000-09-29 | ||
NO20004927A NO313344B1 (en) | 2000-09-29 | 2000-09-29 | Penetrator-pilprosjektil |
PCT/NO2001/000398 WO2002035176A1 (en) | 2000-09-29 | 2001-09-28 | Penetrator arrow projectile |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040011236A1 true US20040011236A1 (en) | 2004-01-22 |
Family
ID=19911636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/381,760 Abandoned US20040011236A1 (en) | 2000-09-29 | 2001-09-28 | Penetrator arrow projectile |
Country Status (8)
Country | Link |
---|---|
US (1) | US20040011236A1 (en) |
EP (1) | EP1320717A1 (en) |
AU (1) | AU2001292460A1 (en) |
CA (1) | CA2424382C (en) |
IL (1) | IL155064A0 (en) |
NO (1) | NO313344B1 (en) |
WO (1) | WO2002035176A1 (en) |
ZA (1) | ZA200302166B (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2804823A (en) * | 1955-05-13 | 1957-09-03 | Jablansky Louis | Multiple unit projectile |
US2945442A (en) * | 1958-01-02 | 1960-07-19 | Barnet R Adelman | Explosive separation device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4018385C2 (en) * | 1990-06-08 | 1996-03-28 | Rheinmetall Ind Gmbh | Sub-caliber balancing projectile for practice purposes |
SE508072C2 (en) * | 1995-09-13 | 1998-08-24 | Bofors Ab | Armour piercing missile |
FR2768809B1 (en) * | 1997-09-24 | 1999-10-15 | Giat Ind Sa | LARGE CALIBER LONG RANGE FIELD ARTILLERY PROJECTILE |
NO995142A (en) * | 1999-06-04 | 2000-10-16 | Nammo Raufoss As | Propulsion device for a projectile in a missile |
-
2000
- 2000-09-29 NO NO20004927A patent/NO313344B1/en not_active IP Right Cessation
-
2001
- 2001-09-28 CA CA002424382A patent/CA2424382C/en not_active Expired - Fee Related
- 2001-09-28 IL IL15506401A patent/IL155064A0/en unknown
- 2001-09-28 WO PCT/NO2001/000398 patent/WO2002035176A1/en not_active Application Discontinuation
- 2001-09-28 AU AU2001292460A patent/AU2001292460A1/en not_active Abandoned
- 2001-09-28 US US10/381,760 patent/US20040011236A1/en not_active Abandoned
- 2001-09-28 EP EP01972820A patent/EP1320717A1/en not_active Withdrawn
-
2003
- 2003-03-18 ZA ZA200302166A patent/ZA200302166B/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2804823A (en) * | 1955-05-13 | 1957-09-03 | Jablansky Louis | Multiple unit projectile |
US2945442A (en) * | 1958-01-02 | 1960-07-19 | Barnet R Adelman | Explosive separation device |
Also Published As
Publication number | Publication date |
---|---|
NO20004927L (en) | 2002-04-02 |
EP1320717A1 (en) | 2003-06-25 |
ZA200302166B (en) | 2004-02-16 |
AU2001292460A1 (en) | 2002-05-06 |
IL155064A0 (en) | 2003-10-31 |
NO313344B1 (en) | 2002-09-16 |
WO2002035176A1 (en) | 2002-05-02 |
CA2424382A1 (en) | 2002-05-02 |
CA2424382C (en) | 2006-02-07 |
NO20004927D0 (en) | 2000-09-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |