WO2022085011A1 - Propellant for a projectile - Google Patents
Propellant for a projectile Download PDFInfo
- Publication number
- WO2022085011A1 WO2022085011A1 PCT/IL2021/051261 IL2021051261W WO2022085011A1 WO 2022085011 A1 WO2022085011 A1 WO 2022085011A1 IL 2021051261 W IL2021051261 W IL 2021051261W WO 2022085011 A1 WO2022085011 A1 WO 2022085011A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- explosive
- liquid
- ammunition round
- container
- projectile
- Prior art date
Links
- 239000003380 propellant Substances 0.000 title claims abstract description 25
- 239000002360 explosive Substances 0.000 claims abstract description 62
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000004880 explosion Methods 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 9
- 238000007493 shaping process Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 3
- 238000005474 detonation Methods 0.000 claims description 2
- 239000004450 Cordite Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000003721 gunpowder Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002730 additional effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
-
- 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
- F42B10/42—Streamlined projectiles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
- F42B5/16—Cartridges, i.e. cases with charge and missile characterised by composition or physical dimensions or form of propellant charge, with or without projectile, or powder
Definitions
- the present invention relates to an ammunition round with a propellant and a method for propulsion of ammunition rounds and projectiles, including shells and bullets.
- a typical ammunition round 10 is shown in Fig 1 and includes a bullet or shell 12 and a casing 14.
- Fig. 2 shows a longitudinal cross-section in which the bullet 12 sits on top of the casing.
- the casing is hollow and is filled with cordite or gunpowder 16 which is ignited by ignition switch 18 to fire the gun and launch the round.
- the round is typically placed in the barrel of a gun.
- the present embodiments may replace the cordite with the combination of an explosive charge and a fluid.
- the explosive may be conventional cordite or gunpowder or may be high explosive, and the high explosive may be a shaped charge, the shape for additional effect in focusing the directionality of the explosion.
- the liquid may for example be water. The liquid can be compressed by the explosion and then evaporate to amplify the effect of the explosion in propelling the projectile from the gun. It is believed that a focused explosion with suitably shaped high explosive will not produce greater wear on the barrel than a standard cordite explosion and may even do less damage to the barrel because of the focusing of the explosion, which is not possible with cordite, allowing the weapon to remain accurate and serviceable for a longer period of time.
- an ammunition round comprising a head, a casing and a propellant, the propellant comprising an explosive and a liquid.
- the explosive is a high explosive charge.
- the high explosive charge is a shaped charge.
- the explosive round and the liquid are contained in respective first and second compartments within the casing.
- the first and second compartments are located one in front of the other along the axis of the casing.
- Embodiments may comprise a divider between said first and second compartments.
- said divider has a center and a circumference and is shaped to extend towards a base of said round at said center and towards a tip of said round at said circumference, thereby to accommodate a shaped charge in said first compartment
- Embodiments may comprise a baffle along said divider between said first and second compartments.
- the liquid is water.
- the head has a base towards the propellant, the base having a convex shape.
- the head has a base towards the propellant, the base having a concave shape.
- the head has a base towards the propellant, the base having a flat shape.
- An aspect of the present invention relates to a gun with the ammunition round described herein.
- a further aspect of the present invention relates to a method of firing a gun to launch a projectile, the method comprising: detonating an explosive charge; launching the explosive charge into a liquid; launching the liquid into a head of the projectile to launch the projectile.
- the method may comprise shaping the explosive charge to focus the explosion axially along a casing of the projectile.
- the method may comprise placing a baffle between the explosive charge and the liquid to compress the liquid over an extent of a surface.
- the method may comprise shaping a base of the head of the projectile into a concave shape to amplify an explosive force, or shaping a base of the head of the projectile into a convex shape to moderate an explosive force.
- an ammunition round comprising a head and a casing, the casing having two chambers for a propellant.
- one of said chambers contains explosive and a second of said chambers comprises a fluid.
- the round may have a base and a tip and an axial direction between said base and said tip, and the one of said chambers containing said explosive is located towards said base in said axial direction and said second of said chambers is axially adjacent said first of said chambers towards said tip.
- a gun containing an ammunition round, a container of explosive and a container of liquid.
- the container of liquid is located between said ammunition round and said container of explosive.
- the container of liquid is located is located between said container of explosive and a rear of said gun.
- the container of liquid comprises a jacket around said container of explosive.
- the container of liquid comprises a jacket around said container of explosive, said jacket extending over one or both ends of said container of explosive.
- said container of explosive is shaped to focus explosive energy.
- FIG. 1 is simplified diagram showing a bullet as known in the prior art
- FIG. 2 is a longitudinal cross-section of the bullet of Fig. 1;
- FIG. 3 is a longitudinal cross-sectional diagram showing an ammunition round according to an embodiment of the present invention.
- FIG. 4 is a view of the longitudinal cross-sectional view of Fig. 3 wherein the propellant chambers are filled with high explosive and fluid;
- FIG. 5 is an exploded diagram showing parts of the ammunition round of Fig. 3.
- the present invention relates to an ammunition round.
- the ammunition round is provided with a two-part propellant.
- the two-part propellant may be provided within two compartments in the casing.
- One of the parts of the propellant is a fluid, for example a liquid and for example water.
- the other part is an explosive, such as high explosive and for example a shaped charge.
- the explosive is detonated into the liquid and compresses the liquid and also superheats it to form high pressure steam.
- the continuing force of the explosive is then amplified by the expansion force of the steam, and the propellant thus makes use of both the thermal and kinetic energy of the explosion to provide kinetic energy for launch of the round. Expansion of the steam may in fact serve to cool the barrel.
- Figs. 1 and 2 show a round of ammunition according to the existing art and have been discussed in the background.
- Figs. 3 and 4 illustrates a round of ammunition 30 according to embodiments of the present invention.
- the round 30 comprises a bullet 32 fixed to a casing 34.
- the casing 34 is hollow as before but the hollow is made of two compartments, an upper compartment 36 which is filled with fluid 44 and a lower compartment 38 that comprises an explosive charge 46.
- the fluid may be a liquid or a gas, and the liquid may be water, including demineralized water and reduced mineral water, and alcohol, or water with additives, and the explosive may be a high explosive.
- a detonating pin 40 may detonate the charge.
- Fig. 4 shows the two propellant compartments filled with fluid and explosive respectively.
- the high explosive is shaped and the divider wall between the explosive and liquid chambers is indicated by reference numeral 42.
- the shape is such as to provide a central hollow to support focusing of the explosion.
- the focused explosion spreads axially up the shell and into the liquid containing compartment.
- the liquid may serve to amplify the detonation, for example by being compressed or by evaporating or both.
- Fig. 5 is a simplified exploded diagram showing the separate parts of the round 30 according to various embodiments of the present invention.
- the interior of the shell 34 is made up of two compartments.
- the two compartments 36 and 38 may be a single structure with a divider 42 in between. Alternatively they may be two separate capsules.
- a baffle 50 may be placed in between the two compartments. The baffle may serve as a plunger that is launched by the high explosive into the liquid and provides a solid front to the liquid, causing compression and then adding additional spring force to launch the bullet.
- the bullet itself may be shaped to manage or compound the launch force of the explosion.
- Bullet 32.1 has a concave shape.
- Bullet 32.2 has a convex shape and bullet 32.3 has a flat shape.
- the propellant is not necessarily built into a casing but rather shells and propellants may be placed separately into the barrels.
- a shaped charge or a sack of cordite or gunpowder or the like may be placed in the barrel along with a container of fluid.
- the liquid container may be adjacent the projectile. Additionally or alternatively a liquid container may also be provided behind the explosive in the gun barrel.
- the water may usefully be demineralized, so as not to leave mineral deposits lining the gun barrel.
- the liquid may alternatively be an alcohol, which has a lower density than water but also a lower boiling point.
- the liquid may be both water and alcohol, each being kept in a separate container or in a separate chamber in a casing.
- the liquid may be kept in a container made of a material that is waterproof but e vaporates with the heat of the explosion so as not to leave traces on the barrel
- any other liquid may be used, especially those liquids whose molecular merits allow it to dissolve in water.
- the liquids may have additives which influence the mechanical or thermal properties of the liquids.
- the liquid may also be placed in longitudinal containers alongside the explosive in the barrel.
- the present embodiments may be applied to those types of ammunition known in tire art where the casing is degradable on firing.
- the same construction may be used in conventional casing-type ammunition.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3223749A CA3223749A1 (en) | 2020-10-25 | 2021-10-25 | Propellant for a projectile |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL27827520 | 2020-10-25 | ||
IL278275 | 2020-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022085011A1 true WO2022085011A1 (en) | 2022-04-28 |
Family
ID=81290194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IL2021/051261 WO2022085011A1 (en) | 2020-10-25 | 2021-10-25 | Propellant for a projectile |
Country Status (2)
Country | Link |
---|---|
CA (1) | CA3223749A1 (en) |
WO (1) | WO2022085011A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB197518A (en) * | 1920-01-16 | 1923-05-17 | Union Generale Cooperative | Improvements in explosive charges |
US2960031A (en) * | 1952-09-12 | 1960-11-15 | Giles D Clift | Liquid projectile propellant for military ammunition |
US4376406A (en) * | 1981-03-02 | 1983-03-15 | The United States Of America As Represented By The Secretary Of The Navy | Hybrid gun system |
US4461214A (en) * | 1982-06-24 | 1984-07-24 | The United States Of America As Represented By The Secretary Of The Navy | Cartridge loaded hybrid propellant |
DE4128575A1 (en) * | 1990-08-31 | 1992-03-05 | Fraunhofer Ges Forschung | Gun for firing high-velocity projectile - has primary chamber for powder propellant and second chamber for liq. propellant |
-
2021
- 2021-10-25 WO PCT/IL2021/051261 patent/WO2022085011A1/en active Application Filing
- 2021-10-25 CA CA3223749A patent/CA3223749A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB197518A (en) * | 1920-01-16 | 1923-05-17 | Union Generale Cooperative | Improvements in explosive charges |
US2960031A (en) * | 1952-09-12 | 1960-11-15 | Giles D Clift | Liquid projectile propellant for military ammunition |
US4376406A (en) * | 1981-03-02 | 1983-03-15 | The United States Of America As Represented By The Secretary Of The Navy | Hybrid gun system |
US4461214A (en) * | 1982-06-24 | 1984-07-24 | The United States Of America As Represented By The Secretary Of The Navy | Cartridge loaded hybrid propellant |
DE4128575A1 (en) * | 1990-08-31 | 1992-03-05 | Fraunhofer Ges Forschung | Gun for firing high-velocity projectile - has primary chamber for powder propellant and second chamber for liq. propellant |
Non-Patent Citations (1)
Title |
---|
.: "Module 05 :: Propellants", FIREARM EXAMINER TRAINING (2008), 31 December 2008 (2008-12-31), pages 1 - 1, XP055926072, Retrieved from the Internet <URL:https://projects.nfstc.org/firearms/module05/fir_m05_t04_01.htm> [retrieved on 20220530] * |
Also Published As
Publication number | Publication date |
---|---|
CA3223749A1 (en) | 2022-04-28 |
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