USH1011H - Anti-aircraft mine - Google Patents
Anti-aircraft mine Download PDFInfo
- Publication number
- USH1011H USH1011H US07/607,413 US60741390A USH1011H US H1011 H USH1011 H US H1011H US 60741390 A US60741390 A US 60741390A US H1011 H USH1011 H US H1011H
- Authority
- US
- United States
- Prior art keywords
- mine
- fin
- warhead
- frontplate
- computer
- 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
Links
- 239000012634 fragment Substances 0.000 claims abstract description 13
- 230000006641 stabilisation Effects 0.000 claims abstract description 8
- 238000011105 stabilization Methods 0.000 claims abstract description 8
- 239000002360 explosive Substances 0.000 claims abstract description 7
- 231100000518 lethal Toxicity 0.000 claims abstract description 7
- 230000001665 lethal effect Effects 0.000 claims abstract description 7
- 238000004880 explosion Methods 0.000 claims abstract 3
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 230000008685 targeting Effects 0.000 description 6
- 238000005474 detonation Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000009933 burial Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
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
- F42B12/10—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 shaped or hollow charge
-
- 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
- F42B10/48—Range-reducing, destabilising or braking arrangements, e.g. impact-braking arrangements; Fall-retarding means, e.g. balloons, rockets for braking or fall-retarding
- F42B10/50—Brake flaps, e.g. inflatable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B23/00—Land mines ; Land torpedoes
- F42B23/04—Land mines ; Land torpedoes anti-vehicle, e.g. anti-aircraft or anti tank
Definitions
- the invention generally relates to an anti-aircraft mine, and in particular the invention relates to an anti-aircraft mine having a targeting device.
- a first prior art mine which is named SADARM (Search and Destroy Armor), is shown in U.S. Pat. No. 4,050,381.
- a related patent is U.S. Pat. No. 4,583,703.
- the first prior art SADARM mine includes a plurality of walls forming a chamber containing an explosive, and includes a detonator, an infra red sensor, and a parachute which supports the mine, for expelling fragments in a downward direction at an object, such as a ground vehicle.
- SADARM mine does not provide an anti-aircraft capability against targets, such as low flying fixed and rotary wing aircraft, drones and missiles.
- targets such as low flying fixed and rotary wing aircraft, drones and missiles.
- Another problem is that it is difficult to orient and place the mine in a selected ground area.
- a second prior art mine which is named RAAM (Remote Anti-Armor Mine), includes a plurality of walls forming a chamber containing an explosive, and includes a detonator and a magnetometer sensor, for expelling fragments in an upward direction at a ground vehicle.
- RAAM Remote Anti-Armor Mine
- RAAM mine does not have an anti-aircraft capability against targets, such as low flying fixed and rotary wing aircraft, drones and missiles.
- an anti-aircraft mine includes a warhead subassembly, and a stabilization subassembly, and a target sensing subassembly.
- the mine is provided with an improved capability of targeting low flying aircraft, and drones, and missiles.
- mine can be better oriented and placed in a selected ground area.
- FIG. 1 is a plan view of an anti-aircraft mine according to the present invention.
- FIG. 2 is a section view as taken along line 2--2 of FIG. 1.
- an anti-aircraft mine 10 is provided.
- Mine or mine assembly 10 includes a warhead subassembly 12, and orientation and stabilization subassembly 14, and a target sensing subassembly or sensor 16.
- Mine 10 is packaged in and is dispensed from a missile, ground vehicle dispenser, aircraft dispenser, or projectile (not shown). Usually there are less than 100 mines in a missile or aircraft dispenser and about six mines in a projectile. Mine 10 can also be hand emplaced. Targets include low flying fixed and rotary wing aircraft, and drones, and missiles.
- Mine 10 is a submunition for an 8 inch artillery projectile. Mine 10 may also be a submunition for a 155 millimeter artillery projectile in another embodiment.
- Warhead subassembly 12 which has an axis of symmetry 18, includes a case or plate or peripheral wall 20, and a warhead plate or frontplate 22, a partition plate 23, and a backplate 24.
- Frontplate 22 and partition plate 23 and peripheral wall 20 form a chamber 26, which contains an explosive 28.
- Backplate 24 and partition plate 23 and peripheral wall 20 form a space 29, which contains the components of the sensor 16.
- Frontplate 22 is a Miznay Shardin type of plate, which has a diameter of about 6.4 inches for an 8 inch projectile. In another embodiment, a 5.7 inch diameter plate is used for a 155 millimeter projectile. Frontplate 22 is shaped to break up into fragments. There are 24 fragments from the larger 6.4 inch diameter plate. There are 12 fragments from the other smaller 5.7 inch diameter plate.
- Pattern spray diameter for the fragments increases about 0.2 feet per foot of ascent altitude. This pattern spray diameter results in a lethal area of about 40 feet diameter at an altitude of about 200 feet.
- the antenna, sensor, signal processor and targeting computer which can track the aircraft, etc., biases the aim or directs more of the mass and energy to a predicted spatial intercept. It can do this by selecting the appropriate peripheral initiation points in the warhead.
- Fragment weight and lethal area can be optimized depending on the type of target encountered and its vulnerability. This can be done by the on board signal processor and targeting computer. Warhead confinement is provided by peripheral wall 20, which also supports the contents thereof during projectile launch. Backplate 24 prevents damage to the components and parts of mine 10 upon ground impact.
- Stabilization subassembly 14 which orients and stabilizes mine 10 during descent thereof, has a fin 30 and a connector 31.
- Fin 30 is a cloth type of fin. Fin 30 also has a tip weight 33.
- fin 30 is a metal fin and has an aerodynamic cross-section and a twist angle for aerodynamic performance.
- fin 30 connects the cloth fin 30 to peripheral wall 20 at the end face of wall 20.
- Connector 31 is a pin and loop type of connector.
- downward tilting of the metal fin may be partly limited by contact of the fin with the wall end face. Upward tilting of the fin may be partly limited by contact of the fin at its inboard corners with the wall end face.
- Fin 30 disperses mine 10 through the conversion of some of the mine's angular momentum to translational momentum. Additional dispersion results from friction induced spin axis transfer. Fin 30 causes mine 10 to decelerate and to slow its spin, which results in a desired vertical trajectory. Sufficient angular momentum remains to prevent an upside down orientation or sideward orientation following ground impact. The drag generated by fin 3C prevents burial of mine 10.
- Sensor 16 includes an antenna 32, and a signal processor 34, and a targeting computer 36. Sensor 16 also includes a detonation device 38.
- Antenna 32 is an active-passive millimeter wave type of antenna. Other types of sensors may be included, such as Infra Red (IR), acoustic, laser, and like sensors.
- Antenna 32 is supported by frontplate 22 and wall 20. Antenna 32 is slightly concave in its outer surface.
- Processor 34 and computer 36 are disposed in space 29 and are supported by plate 23, which is supported by wall 20.
- Detonation device 38 is disposed in chamber 26 and is supported by plate 23. Detonation device 38 activates explosive 28 when the object enters the lethal area.
- Computer 36 has timing means for activating detonator 38 after a calculated time interval.
- the computer 36 and processor 34 select the firing time.
- the detonator 38 then activates the explosive 28 at the firing time.
- Target sensing subassembly 16 provides an improved capability of targeting a low flying object and an improved capability of detonating the mine 10 when the object is in the lethal area of the mine.
- Orientation and stabilization subassembly 14 provides an improved capability of orienting and placing mine 10 in a selected ground area.
- a clamshell type of fin can be used instead of fin 30.
- a sequential fin deployment can be provided, using multiple fins instead of fin 30.
- a flat type of antenna can be used instead of the convex antenna 32.
- Mine 10 can be used against armored vehicles, instead of low flying objects, by using a modified sensor, or the like.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
An anti-aircraft mine which ejects fragment(s) upwardly from an upright ption in a selected ground area. The mine includes a warhead subassembly having walls forming a chamber for an explosive and having a frontplate which forms and ejects fragments upon an explosion, and includes a stabilization subassembly using a fin for controlling the trajectory of descent and its position of landing, after its ejection from an artillery projectile, and includes a target sensing subassembly having an antenna and signal processor and computer for tracking a low flying object, such as a plane, helicopter, drone, or missile, and for upwardly ejecting its fragments when the object enters a lethal zone of the mine.
Description
The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment to me of any royalty thereon.
The invention generally relates to an anti-aircraft mine, and in particular the invention relates to an anti-aircraft mine having a targeting device.
A first prior art mine, which is named SADARM (Search and Destroy Armor), is shown in U.S. Pat. No. 4,050,381. A related patent is U.S. Pat. No. 4,583,703.
The first prior art SADARM mine includes a plurality of walls forming a chamber containing an explosive, and includes a detonator, an infra red sensor, and a parachute which supports the mine, for expelling fragments in a downward direction at an object, such as a ground vehicle.
One problem with the first prior art SADARM mine is that it does not provide an anti-aircraft capability against targets, such as low flying fixed and rotary wing aircraft, drones and missiles. Another problem is that it is difficult to orient and place the mine in a selected ground area.
A second prior art mine, which is named RAAM (Remote Anti-Armor Mine), includes a plurality of walls forming a chamber containing an explosive, and includes a detonator and a magnetometer sensor, for expelling fragments in an upward direction at a ground vehicle.
One problem with the second prior art RAAM mine is that it does not have an anti-aircraft capability against targets, such as low flying fixed and rotary wing aircraft, drones and missiles.
According to the present invention, an anti-aircraft mine is provided. This mine includes a warhead subassembly, and a stabilization subassembly, and a target sensing subassembly.
By using the target sensing subassembly, the mine is provided with an improved capability of targeting low flying aircraft, and drones, and missiles. In addition, by using the orientation and stabilization subassembly, mine can be better oriented and placed in a selected ground area.
The foregoing and other objects, features and advantages will be apparent from the following description of the preferred embodiment of the invention as illustrated in the accompanying drawings.
FIG. 1 is a plan view of an anti-aircraft mine according to the present invention; and
FIG. 2 is a section view as taken along line 2--2 of FIG. 1.
As shown in FIGS. 1 and 2, an anti-aircraft mine 10 is provided. Mine or mine assembly 10 includes a warhead subassembly 12, and orientation and stabilization subassembly 14, and a target sensing subassembly or sensor 16. Mine 10 is packaged in and is dispensed from a missile, ground vehicle dispenser, aircraft dispenser, or projectile (not shown). Usually there are less than 100 mines in a missile or aircraft dispenser and about six mines in a projectile. Mine 10 can also be hand emplaced. Targets include low flying fixed and rotary wing aircraft, and drones, and missiles. Mine 10 is a submunition for an 8 inch artillery projectile. Mine 10 may also be a submunition for a 155 millimeter artillery projectile in another embodiment.
Pattern spray diameter for the fragments increases about 0.2 feet per foot of ascent altitude. This pattern spray diameter results in a lethal area of about 40 feet diameter at an altitude of about 200 feet.
The following table gives the approximate velocity of a typical fragment as a function of altitude.
______________________________________ Altitude, Ft. Velocity, Ft./Sec. ______________________________________ 0 10,000 50 9,075 90 8,300 130 7,650 200 6,620 300 5,510 400 4,400 500 3,620 ______________________________________
In another embodiment, the antenna, sensor, signal processor and targeting computer which can track the aircraft, etc., biases the aim or directs more of the mass and energy to a predicted spatial intercept. It can do this by selecting the appropriate peripheral initiation points in the warhead.
Fragment weight and lethal area can be optimized depending on the type of target encountered and its vulnerability. This can be done by the on board signal processor and targeting computer. Warhead confinement is provided by peripheral wall 20, which also supports the contents thereof during projectile launch. Backplate 24 prevents damage to the components and parts of mine 10 upon ground impact.
Fin 30 disperses mine 10 through the conversion of some of the mine's angular momentum to translational momentum. Additional dispersion results from friction induced spin axis transfer. Fin 30 causes mine 10 to decelerate and to slow its spin, which results in a desired vertical trajectory. Sufficient angular momentum remains to prevent an upside down orientation or sideward orientation following ground impact. The drag generated by fin 3C prevents burial of mine 10.
When sensor 16 detects a low flying object, the angular position and range of the object are recorded. The size and shape of the object are determined. Where the computer determines that the object will enter the lethal area of the mine 10, the computer 36 and processor 34 select the firing time. The detonator 38 then activates the explosive 28 at the firing time.
The advantages of mine 10 are indicated hereafter.
A) Target sensing subassembly 16 provides an improved capability of targeting a low flying object and an improved capability of detonating the mine 10 when the object is in the lethal area of the mine.
B) Orientation and stabilization subassembly 14 provides an improved capability of orienting and placing mine 10 in a selected ground area.
While the invention has been described in its preferred embodiment, it is to be understood that the words which have been used are words of description rather than limitation and that changes may be made within the purview of the appended claims without departing from the true scope and spirit of the invention in its broader aspects.
For example, a clamshell type of fin can be used instead of fin 30. A sequential fin deployment can be provided, using multiple fins instead of fin 30. A flat type of antenna can be used instead of the convex antenna 32. Mine 10 can be used against armored vehicles, instead of low flying objects, by using a modified sensor, or the like.
Claims (4)
1. An anti-aircraft mine comprising:
warhead means for ejection from an artillery projectile;
orientation and stabilization means for guiding the warhead means in a desired descending trajectory;
target sensing means for sensing a low flying object and determining a path of the object and for initiating an explosion if the object enters a lethal area of the mine;
said warhead means having a chamber for an explosive and having a frontplate arranged to form fragments which are ejected therefrom upon the occurrence of an explosion;
said orientation and stabilization means having at least one fin extending therefrom for controlling the descent of the mine and its landing in an upright position; and
said target sensing means having an antenna and computer and signal processor and detonator.
2. The mine of claim 1, wherein
said fin is a cloth fin having a pin and loop connector at an inboard end thereof and having a tip weight at the other end thereof.
3. The mine of claim 1, wherein
said computer has timing means for activating the detonator after a calculated time interval.
4. The mine of claim 1, wherein the warhead means includes:
a peripheral wall for containing the mine components;
a frontplate which is a Miznay Shardin type of plate and which forms fragments that are ejected upwardly from its upright position;
a partition plate for forming the chamber together with the frontplate and peripheral wall; and
a backplate for forming a space for the computer and processor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/607,413 USH1011H (en) | 1990-10-29 | 1990-10-29 | Anti-aircraft mine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/607,413 USH1011H (en) | 1990-10-29 | 1990-10-29 | Anti-aircraft mine |
Publications (1)
Publication Number | Publication Date |
---|---|
USH1011H true USH1011H (en) | 1992-01-07 |
Family
ID=24432161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/607,413 Abandoned USH1011H (en) | 1990-10-29 | 1990-10-29 | Anti-aircraft mine |
Country Status (1)
Country | Link |
---|---|
US (1) | USH1011H (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5505136A (en) * | 1991-06-21 | 1996-04-09 | Thomson-Brandt Armements | Core-generating charge with means for correcting entrainment rotation effects |
US5555036A (en) * | 1992-12-17 | 1996-09-10 | Trw Inc. | Passive millimeter wave traffic sensor |
WO1999051932A2 (en) * | 1998-04-08 | 1999-10-14 | Moshier Gary S | Launched munition neutralization of buried mines |
WO2010056419A1 (en) * | 2008-11-17 | 2010-05-20 | Raytheon Company | Dual-mass forward and side firing fragmentation warhead |
US7930978B1 (en) | 2008-05-19 | 2011-04-26 | Raytheon Company | Forward firing fragmentation warhead |
US20110146523A1 (en) * | 2008-05-19 | 2011-06-23 | Raytheon Company | High-lethality low collateral damage fragmentation warhead |
-
1990
- 1990-10-29 US US07/607,413 patent/USH1011H/en not_active Abandoned
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5505136A (en) * | 1991-06-21 | 1996-04-09 | Thomson-Brandt Armements | Core-generating charge with means for correcting entrainment rotation effects |
US5555036A (en) * | 1992-12-17 | 1996-09-10 | Trw Inc. | Passive millimeter wave traffic sensor |
WO1999051932A2 (en) * | 1998-04-08 | 1999-10-14 | Moshier Gary S | Launched munition neutralization of buried mines |
WO1999051932A3 (en) * | 1998-04-08 | 1999-12-09 | Gary S Moshier | Launched munition neutralization of buried mines |
US7930978B1 (en) | 2008-05-19 | 2011-04-26 | Raytheon Company | Forward firing fragmentation warhead |
US20110094408A1 (en) * | 2008-05-19 | 2011-04-28 | Raythenn Company | Forward firing fragmentation warhead |
US20110146523A1 (en) * | 2008-05-19 | 2011-06-23 | Raytheon Company | High-lethality low collateral damage fragmentation warhead |
US7971535B1 (en) | 2008-05-19 | 2011-07-05 | Raytheon Company | High-lethality low collateral damage fragmentation warhead |
WO2010056419A1 (en) * | 2008-11-17 | 2010-05-20 | Raytheon Company | Dual-mass forward and side firing fragmentation warhead |
US20110179966A1 (en) * | 2008-11-17 | 2011-07-28 | Raytheon Company | Dual-mass forward and side firing fragmentation warhead |
US8006623B2 (en) | 2008-11-17 | 2011-08-30 | Raytheon Company | Dual-mass forward and side firing fragmentation warhead |
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Legal Events
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STCF | Information on status: patent grant |
Free format text: PATENTED CASE |