CA1095777A - Charge delivering projectile - Google Patents
Charge delivering projectileInfo
- Publication number
- CA1095777A CA1095777A CA177,162A CA177162A CA1095777A CA 1095777 A CA1095777 A CA 1095777A CA 177162 A CA177162 A CA 177162A CA 1095777 A CA1095777 A CA 1095777A
- Authority
- CA
- Canada
- Prior art keywords
- projectile
- sabot
- fins
- charge
- rear portion
- 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
Links
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
-
- 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
-
- 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
- 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
- F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
- F42B12/46—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing gases, vapours, powders or chemically-reactive substances
- F42B12/50—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing gases, vapours, powders or chemically-reactive substances by dispersion
Abstract
ABSTRACT OF THE DISCLOSURE
A charge-delivering projectile includes a hollow flexible body for containing a charge. The body has a rearwardly tapering rear portion carrying radially-projecting fins. The rear portion has weakened areas between the fins which rupture when the projectile hits the target to cause the charge to be released. In order to reinforce the weakened body during firing there is also provided a sabot including a hollow body into which the projectile can be inserted. The sabot body has a rearwardly tapering rear portion for supporting the weakened areas of the projectile during firing, and the sabot body also has longitudinally-extending slots through which the projectile fins can project.
A charge-delivering projectile includes a hollow flexible body for containing a charge. The body has a rearwardly tapering rear portion carrying radially-projecting fins. The rear portion has weakened areas between the fins which rupture when the projectile hits the target to cause the charge to be released. In order to reinforce the weakened body during firing there is also provided a sabot including a hollow body into which the projectile can be inserted. The sabot body has a rearwardly tapering rear portion for supporting the weakened areas of the projectile during firing, and the sabot body also has longitudinally-extending slots through which the projectile fins can project.
Description
This inventibn relates to charge-delivering projectiles which rup-ture on hitting a target to release the charge carried by the projectile. Such projectiles are used for example to control a crowd of people or a selected individual, The charge carried by the projectile may be a nauseous sub-stance or dye which when hitting the crowd causes the crowd to disperse, Since such projectiles are usually directed at living targets, it is essential that they do not cause any permanent or substantial damage to the target. At the same time, they must be capable of easy rupture upon hitting the target, and must be capable of being satisfactorily fired from a gun.
It is therefore an object of the invention to provide an improved charge-delivering projectile which meets these required conditions, According to the invention, the projectile has a hollow flexible body for containing a charge, and the body has a rearwardly-tapering rear portion with radially-projecting fins. The rear portion has weakened areas between the fins which rupture when the projectile hits a target to cause the charge to be released, The weakened areas are preferably formed by longitudinally-extending grooves between the fins, A sabot for the projectile includes a hollow body into which the projectile can be inserted, The sabot body has a rearwardly-tapering rear - 20 portion for supporting the weakened areas of the projectile during firing, The rear sabot portion also has longitudinally-extending slots through which the projectile fins project, Since the weakened areas of the projectile are supported by the sabot during firing, they can be made weaker than if they were not so supported, and hence more easily rupturable upon hitting the target, Also, the location of the weakened areas on a rear portion of the projectile pro-vide better release of the projectile charge upon hitting the target, com-pared to the known manner of providing weakened areas at the front of the projectile in which case release of the charge may be obstructed by the 3 0 tar get its elf .
One errbodiment of the invention will now be described, by ~,vay of example, with reference to the accompanying drawings, of which:-~og5~7~7 Figure 1 is a side view o~ a proj~ctile.
Figure 2 is a sectional side view of the projectile along the line2-2 of Figure 3, Figure 3 is a front view of the projectile, Figure 4 is a rear view of the projectile, Figure 5 is a side view of a sabot for the projectile, Figure 6 is a rear view of the sabot, Figure 7 is a front view of the sabot, Figure 8 is a sectional side view of the sabot along the line 8-8 10 of Figure 7, Figure 9 is a side view of a pusher element, and Figure 10 is a front view of the pusher element.
Figures 1 to 4 show a projectile 11 which is formed of a suitable flexible material, such as neoprene, and has a hollow body formed by a part-spherical nose portion 13 and a rearwardly-extending finned portion 13.
The rear annular edge 14 of the nose portion 12 is secured to the front annular edge 15 of the finned portion 13 in a suitable manner. As show~, the edge 14 of the nose portion 12 is of reduced diameter and fits within the edge 15 of the finned portion 13. A suitable adhesive may be used to hold the 20 portions 12, 13 together. The nose portion lZ has a forward central aperture 16 which is closeable by a plug 17, the plug 17 being shaped to snap into engagelnent with the wall of the aperture 16. Thus, the hollow pro jectile body can be filled with a suitable nauseous substance or dye through the aperture 1 6.
From the front annular edge 15, the finned portion 13 tapers rear-wardly almost to a point at its rear end 18, Four equally-angularly spaced fins 19 project radially from the tapering part of the finned portion 13, The radially-outer edges 20 of the fins 19 are parallel to the longitudinal axis of the body, and are aligned with the front annular edge 15 so as to form a 30 rearward continuation thereof. The rear edges 21 of the fins 19 are perpen-dicular to the longitudinal a~is of the body 11, and are aligned with the rear end 18 of the finned portion 13.
The rearwardly-extending finned portion 13 has four longitudinally-extending weakening grooves 22. Each groove 22 extends rearwardly from adjacent the front annular edge 15 almost to the r,ear end 18, and is located between a respective pair of fins 19 so as to be equally spaced therefrom.
Referring now to Figures 5 to 8, a sabot 23 is formed as a hollow body shaped to receive the pro jectile 11, The sabot 23 has a forward cylin-drical portion 24 with an open front end, and an internal diameter slightly larger than the external diameter of the projectile 11. A rear portion 25 tapers rearwardly from the front portion 24 for the major part of its length, 10 and terminates in a short end portion 26 of constant diameter. The sabot 23 has four equally-angularly spaced, longitudinally-extending slots 27 which extend through the tapering rear portion 25 and also extend part way into the front portion 24 and the rear end portion 26, A longitudinally-extending cut 28 extends from the front end of each slot 27 to the front edge of the forward portion 24, The sabot 23 also has four equi-angularly spaced fins 29 which projec,t radially from the rear portion 25 and end portion 26, Each fin 29 extends rearwardly from the front end of the rear portion 25 to the rear end of the end portion 26, and is located between a respective pair of slots 27 20 so as to be equally spaced therefrom. The radially-outer edges 30 of the sabot fins 29 are parallel to the longitudinal axis of the sabot 23, and are aligned with the forward portion 24 so as to form a rearward contimlation thereof. The rear edges 31 of the sabot fins 29 are perpendicular to the longitudinal axis of the sabot 23 and are aligned with the rear end of the end portion 26, A concave recess 32 is formed at the junction of the radially-outer edge 30 and the end edge 31 of each sabot fin 29 for a purpose which will be described later, A pusher element 33 is formed as a disc from one side of which projects an annular peripheral rib 34, which is shaped to engage the rear 30 end of the sabot 23 with the rib 34 seating in the recesses 32 in the sabot fins 29, Before firing, the projectile 11 is inserted into the sabot 23 so that ...... . ~j ,, ,~95777 the projectile fins 19 project through the slots Z7. The rear portion 13 of the projectile 11 engages and is therefore supported during firing by the rear portion 25 of the sabot 23. In particular, the parts of the rear projectile portion 13 having the weakening grooves 2~ are supported by the parts of the rear sabot portion 25 carrying the fins 29. The fins 29 in part act as struc-tural supports to prevent bowing of the rearwardly tapering section of the sabot during launch.
The sabot 23, with the projectile 11 therein, is inserte~l into a gun with the pusher element 33 in engagement with the rear end of the sabot, 10 When the gun is fired, the propulsive force is transmitted througk the pusher element 33 to the sabot 23 and projectile 11. After leaving the gun, the pusher element 33 falls away, as also then does the sabot 23, leaving the projectile ll to follow its intended trajectory. On hitting the target, the projectile 11 fractures along the weakening grooves 22 to release the contained charge at the target.
The sabot 23 falls away from the projectile 11, after leav~ng the gun, because air pressure acting on the sabot 23 causes it to separate along the cuts 28 and slots 27 into four petal-like segments with high air drag.
The positioning of the weakening grooves 22 at the rear of the pro-20 jectile provides two advantages. Firstly, they are supported by the sabot 23 during firing, thus reducing the risk of the projectile 11 bursting open at this stage, This also means that the weakening grooves 22 can be constructed to open more readily on hitting the target, because of the reduced risk of bursting upon firing. Thus, the projectile does not have to hit the target so hard to cause release of the contained charge, thus reducing the risk of injury to soft targets, for example human targets.
Secolldly, the contained charge can be more satisfactorily released at the target, since the rear portion of the projectile is less likely to be in contact w-ith the target than the front portion, ~vith consequent less risk of 30 the target itself obstructing release of the contained charge.
Further, the projectile fins 19 are not constrained by the sahot during firing, and therefore are not distorted by the sabot at this st1ge, t}lUS
_4-~t~95777 avoiding the occurrence of erratic flight characterishcs which would bc caused by any such distortion.
It will also be noted that the described projectile has an efficient aerodynamic shape, it is body stabiiiæed and can be fired from an unrifled gun.
It is therefore an object of the invention to provide an improved charge-delivering projectile which meets these required conditions, According to the invention, the projectile has a hollow flexible body for containing a charge, and the body has a rearwardly-tapering rear portion with radially-projecting fins. The rear portion has weakened areas between the fins which rupture when the projectile hits a target to cause the charge to be released, The weakened areas are preferably formed by longitudinally-extending grooves between the fins, A sabot for the projectile includes a hollow body into which the projectile can be inserted, The sabot body has a rearwardly-tapering rear - 20 portion for supporting the weakened areas of the projectile during firing, The rear sabot portion also has longitudinally-extending slots through which the projectile fins project, Since the weakened areas of the projectile are supported by the sabot during firing, they can be made weaker than if they were not so supported, and hence more easily rupturable upon hitting the target, Also, the location of the weakened areas on a rear portion of the projectile pro-vide better release of the projectile charge upon hitting the target, com-pared to the known manner of providing weakened areas at the front of the projectile in which case release of the charge may be obstructed by the 3 0 tar get its elf .
One errbodiment of the invention will now be described, by ~,vay of example, with reference to the accompanying drawings, of which:-~og5~7~7 Figure 1 is a side view o~ a proj~ctile.
Figure 2 is a sectional side view of the projectile along the line2-2 of Figure 3, Figure 3 is a front view of the projectile, Figure 4 is a rear view of the projectile, Figure 5 is a side view of a sabot for the projectile, Figure 6 is a rear view of the sabot, Figure 7 is a front view of the sabot, Figure 8 is a sectional side view of the sabot along the line 8-8 10 of Figure 7, Figure 9 is a side view of a pusher element, and Figure 10 is a front view of the pusher element.
Figures 1 to 4 show a projectile 11 which is formed of a suitable flexible material, such as neoprene, and has a hollow body formed by a part-spherical nose portion 13 and a rearwardly-extending finned portion 13.
The rear annular edge 14 of the nose portion 12 is secured to the front annular edge 15 of the finned portion 13 in a suitable manner. As show~, the edge 14 of the nose portion 12 is of reduced diameter and fits within the edge 15 of the finned portion 13. A suitable adhesive may be used to hold the 20 portions 12, 13 together. The nose portion lZ has a forward central aperture 16 which is closeable by a plug 17, the plug 17 being shaped to snap into engagelnent with the wall of the aperture 16. Thus, the hollow pro jectile body can be filled with a suitable nauseous substance or dye through the aperture 1 6.
From the front annular edge 15, the finned portion 13 tapers rear-wardly almost to a point at its rear end 18, Four equally-angularly spaced fins 19 project radially from the tapering part of the finned portion 13, The radially-outer edges 20 of the fins 19 are parallel to the longitudinal axis of the body, and are aligned with the front annular edge 15 so as to form a 30 rearward continuation thereof. The rear edges 21 of the fins 19 are perpen-dicular to the longitudinal a~is of the body 11, and are aligned with the rear end 18 of the finned portion 13.
The rearwardly-extending finned portion 13 has four longitudinally-extending weakening grooves 22. Each groove 22 extends rearwardly from adjacent the front annular edge 15 almost to the r,ear end 18, and is located between a respective pair of fins 19 so as to be equally spaced therefrom.
Referring now to Figures 5 to 8, a sabot 23 is formed as a hollow body shaped to receive the pro jectile 11, The sabot 23 has a forward cylin-drical portion 24 with an open front end, and an internal diameter slightly larger than the external diameter of the projectile 11. A rear portion 25 tapers rearwardly from the front portion 24 for the major part of its length, 10 and terminates in a short end portion 26 of constant diameter. The sabot 23 has four equally-angularly spaced, longitudinally-extending slots 27 which extend through the tapering rear portion 25 and also extend part way into the front portion 24 and the rear end portion 26, A longitudinally-extending cut 28 extends from the front end of each slot 27 to the front edge of the forward portion 24, The sabot 23 also has four equi-angularly spaced fins 29 which projec,t radially from the rear portion 25 and end portion 26, Each fin 29 extends rearwardly from the front end of the rear portion 25 to the rear end of the end portion 26, and is located between a respective pair of slots 27 20 so as to be equally spaced therefrom. The radially-outer edges 30 of the sabot fins 29 are parallel to the longitudinal axis of the sabot 23, and are aligned with the forward portion 24 so as to form a rearward contimlation thereof. The rear edges 31 of the sabot fins 29 are perpendicular to the longitudinal axis of the sabot 23 and are aligned with the rear end of the end portion 26, A concave recess 32 is formed at the junction of the radially-outer edge 30 and the end edge 31 of each sabot fin 29 for a purpose which will be described later, A pusher element 33 is formed as a disc from one side of which projects an annular peripheral rib 34, which is shaped to engage the rear 30 end of the sabot 23 with the rib 34 seating in the recesses 32 in the sabot fins 29, Before firing, the projectile 11 is inserted into the sabot 23 so that ...... . ~j ,, ,~95777 the projectile fins 19 project through the slots Z7. The rear portion 13 of the projectile 11 engages and is therefore supported during firing by the rear portion 25 of the sabot 23. In particular, the parts of the rear projectile portion 13 having the weakening grooves 2~ are supported by the parts of the rear sabot portion 25 carrying the fins 29. The fins 29 in part act as struc-tural supports to prevent bowing of the rearwardly tapering section of the sabot during launch.
The sabot 23, with the projectile 11 therein, is inserte~l into a gun with the pusher element 33 in engagement with the rear end of the sabot, 10 When the gun is fired, the propulsive force is transmitted througk the pusher element 33 to the sabot 23 and projectile 11. After leaving the gun, the pusher element 33 falls away, as also then does the sabot 23, leaving the projectile ll to follow its intended trajectory. On hitting the target, the projectile 11 fractures along the weakening grooves 22 to release the contained charge at the target.
The sabot 23 falls away from the projectile 11, after leav~ng the gun, because air pressure acting on the sabot 23 causes it to separate along the cuts 28 and slots 27 into four petal-like segments with high air drag.
The positioning of the weakening grooves 22 at the rear of the pro-20 jectile provides two advantages. Firstly, they are supported by the sabot 23 during firing, thus reducing the risk of the projectile 11 bursting open at this stage, This also means that the weakening grooves 22 can be constructed to open more readily on hitting the target, because of the reduced risk of bursting upon firing. Thus, the projectile does not have to hit the target so hard to cause release of the contained charge, thus reducing the risk of injury to soft targets, for example human targets.
Secolldly, the contained charge can be more satisfactorily released at the target, since the rear portion of the projectile is less likely to be in contact w-ith the target than the front portion, ~vith consequent less risk of 30 the target itself obstructing release of the contained charge.
Further, the projectile fins 19 are not constrained by the sahot during firing, and therefore are not distorted by the sabot at this st1ge, t}lUS
_4-~t~95777 avoiding the occurrence of erratic flight characterishcs which would bc caused by any such distortion.
It will also be noted that the described projectile has an efficient aerodynamic shape, it is body stabiiiæed and can be fired from an unrifled gun.
Claims (8)
1. A charge-delivering projectile including a hollow flexible body for containing a charge, said body having a rearwardly tapering rear portion carrying radially-projecting fins, and said rear portion having weakened areas between the fins which rupture when the projectile hits the target to cause the charge to be released.
2. A projectile according to Claim 1 wherein the weakened areas are formed by longitudinally-extending grooves between the fins.
3. A projectile according to Claim 1 wherein the fins have radially-outer edges extending parallel to the longitudinal axis of the body and lying on the maximum diameter thereof.
4. A projectile according to Claim 3 wherein the fins extend rear-wardly from a maximum diameter portion of the body.
5. A projectile according to Claim 4 wherein the fins have rear edges which are perpendicular to the longitudinal axis of the body.
6. A projectile according to Claim 5 wherein the rear edges are aligned with the rear end of the body.
7. A charged delivering projectile as in Claim 1, further including a sabot with a hollow body in which the projectile can be inserted, the sabot body having a rearwardly-tapering rear portion for supporting the weakened areas of the projectile during firing, and the sabot body also having longitudinally-extending slots through which the projectile fins can project.
8. A charged delivering projectile as in Claim 2, further including a sabot with a hollow body in which the projectile can be inserted, the sabot body having a rearwardly-tapering rear portion for supporting the weakened areas of the projectile during firing, and the sabot body also having longitudinally-extending slots through which the projectile fins can project, the sabot body having radially-projecting fins corresponding in position to the weakening grooves of the projectile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA177,162A CA1095777A (en) | 1973-07-24 | 1973-07-24 | Charge delivering projectile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA177,162A CA1095777A (en) | 1973-07-24 | 1973-07-24 | Charge delivering projectile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1095777A true CA1095777A (en) | 1981-02-17 |
Family
ID=4097394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA177,162A Expired CA1095777A (en) | 1973-07-24 | 1973-07-24 | Charge delivering projectile |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1095777A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2526153A1 (en) * | 1980-06-11 | 1983-11-04 | Saint Louis Inst | Sub-calibre projectile with propelling ring - comprising outer deformable plastics cylinder and inner metal cone |
| FR2695717A1 (en) * | 1992-09-16 | 1994-03-18 | Saint Louis Inst | Boost for projectile for accelerator by effect of ramjet and projectile equipped with such a shoe. |
| US20220307806A1 (en) * | 2021-03-24 | 2022-09-29 | Jamie George McWilliam | Bullet Stabilization in Subsonic Flight |
-
1973
- 1973-07-24 CA CA177,162A patent/CA1095777A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2526153A1 (en) * | 1980-06-11 | 1983-11-04 | Saint Louis Inst | Sub-calibre projectile with propelling ring - comprising outer deformable plastics cylinder and inner metal cone |
| FR2695717A1 (en) * | 1992-09-16 | 1994-03-18 | Saint Louis Inst | Boost for projectile for accelerator by effect of ramjet and projectile equipped with such a shoe. |
| US5394805A (en) * | 1992-09-16 | 1995-03-07 | Institut Franco-Allemand De Recherches De Saint-Louis | Sabot for projectiles of RAM accelerators and projectiles equipped with such a sabot |
| US20220307806A1 (en) * | 2021-03-24 | 2022-09-29 | Jamie George McWilliam | Bullet Stabilization in Subsonic Flight |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |