NZ733335B2 - Projectile with reduced ricochet risk - Google Patents
Projectile with reduced ricochet risk Download PDFInfo
- Publication number
- NZ733335B2 NZ733335B2 NZ733335A NZ73333515A NZ733335B2 NZ 733335 B2 NZ733335 B2 NZ 733335B2 NZ 733335 A NZ733335 A NZ 733335A NZ 73333515 A NZ73333515 A NZ 73333515A NZ 733335 B2 NZ733335 B2 NZ 733335B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- projectile
- receiving space
- shell
- core
- predetermined breaking
- Prior art date
Links
- FVJPCMWLCUNXLG-UHFFFAOYSA-N 6-chloro-2-N,4-N-diethyl-1,3,5-triazine-2,4-diamine;2-(phosphonomethylamino)acetic acid Chemical compound OC(=O)CNCP(O)(O)=O.CCNC1=NC(Cl)=NC(NCC)=N1 FVJPCMWLCUNXLG-UHFFFAOYSA-N 0.000 title description 3
- 229910001369 Brass Inorganic materials 0.000 claims abstract description 12
- 239000010951 brass Substances 0.000 claims abstract description 12
- 238000005192 partition Methods 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 6
- 239000000700 tracer Substances 0.000 claims description 6
- 230000000384 rearing Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 7
- 238000011068 load Methods 0.000 abstract description 4
- 239000011257 shell material Substances 0.000 description 29
- 150000002500 ions Chemical class 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229940035295 Ting Drugs 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000001070 adhesive Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000004059 degradation Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000003116 impacting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009931 pascalization Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
The invention relates to a projectile (5) with a frangible material for short-trajectory ammunition. In order that there are no great losses of precision and that the internal ballistic loading is not so great as to lead to destruction of the projectile, it is proposed according to the invention that the projectile (5) consists of a brass casing (4), the casing (4) has, seen in the direction of flight, a front cylindrical receiving space (4a) and a rear cylindrical receiving space (4b), the two receiving spaces (4a, 4b) are arranged coaxially in relation to the longitudinal axis (15) of the projectile and are separated from one another by a separating wall (16), the separating wall (16) forms the base (18) of the front receiving space (4a) and a core (1) of a frangible material is inserted in the front receiving space (4a), the core (1) protrudes with its tip (17) out of the front receiving space (4a) and, in the region of the separating wall (16), the casing (4) incorporates at least one predetermined breaking location (2), running around the casing (4). t the projectile (5) consists of a brass casing (4), the casing (4) has, seen in the direction of flight, a front cylindrical receiving space (4a) and a rear cylindrical receiving space (4b), the two receiving spaces (4a, 4b) are arranged coaxially in relation to the longitudinal axis (15) of the projectile and are separated from one another by a separating wall (16), the separating wall (16) forms the base (18) of the front receiving space (4a) and a core (1) of a frangible material is inserted in the front receiving space (4a), the core (1) protrudes with its tip (17) out of the front receiving space (4a) and, in the region of the separating wall (16), the casing (4) incorporates at least one predetermined breaking location (2), running around the casing (4).
Description
Projectile with reduced ricochet risk
1. FIELD OF THE INVENTION
The invention relates to a projectile which is partly made of a frangible material, for range
ammunition.
2. BACKGROUND OF THE INVENTION
Short-range ammunition has the purpose of enabling the use of larger calibers in smaller training
areas. A r drop in speed is generated by structural measures. This can be realized with a
low tile weight. A further option is a cation of the external projectile geometry.
There are various basic principles in this case, such as a reduction of the stabilization (GD)
resulting from an aerodynamically unfavorable front or rear end, or a desired pressure reduction
over the firing process, thereby reducing the acceleration of the projectile.
Frangibility is a property of special projectiles, and means that the projectile material is designed
so that the projectiles nt into small particles upon impacting hard targets.
Frangible tion already exists in an enormous variety. In particular, projectiles with a
polymer matrix or with a metal matrix are known. The purpose in this case is to achieve crumbling
of the projectile into the smallest le particles upon impact on a hard surface. The particles
have low sectional density. The result is a l potential hazard for nearby objects. However,
frangible projectiles are relatively difficult to use. For larger rs, the radial force arising from
the spin can result in the projectile bursting in the air.
Figure 1 shows a cartridge with a frangible projectile 12 according to the prior art. The frangible
projectile 12 is inserted into a casing 13, n the ogive of the projectile 12 protrudes from
the casing 13. After the frangible projectile 12 impacts, by way of example, a steel plate, the
frangible projectile 12 breaks apart into dust 14.
One or more of the following problems exist with short-range projectiles:
- Short-range projectiles can have significant losses of precision due to the modified
geometry.
- Light short-range projectiles demonstrate a problematic reloading behavior, since a
consistent recoil is required for the reloading nt.
- If a range ricochet occurs, there is a considerable danger for the shooter and for third
parties.
- Degradation on the rotor blade or propellers of aircraft and helicopters due to plastic caps
discharging.
- Purely frangible projectiles have the problem, in the case of large ammunition types, that
the internal ballistic load is so great that it leads to the destruction of the projectile.
t this background, it would advance frangible projectile development by making available
a tile that tes or fully addresses one or more of the aforementioned disadvantages.
3. SUMMARY OF THE INVENTION
In accordance with the present invention there is ed a projectile sing (i.e. having) a
frangible core and a shell made of brass, n the shell, viewed in flight direction of the
projectile, has a front cylindrical receiving space and a rear cylindrical receiving space, both
receiving spaces being arranged coaxially with a longitudinal axis of the projectile and separated
from each other by a partition wall, the partition wall forming a floor of the front receiving space,
wherein the core made of a frangible material is inserted into the front receiving space and has
a core tip protruding out of the forward receiving space, and wherein at least one predetermined
breaking point which runs around the circumference of the shell is formed in the shell in the
region of the partition. Due to the modified geometry there is no loss of precision and the internal
ballistic load is not so great that it leads to the destruction of the projectile. In addition, a groove
or spiral formed in the front space can have further predetermined breaking points.
In an advantageous embodiment according to the invention, a tracer composition is arranged in
the rear receiving space of the tile shell. The rear receiving space lends itself to this, and
the tracer composition even desirably shifts the center of y slightly toward the rear, thereby
improving the flight path.
The core is preferably glued or press-fitted into the front receiving space. Both are appropriate
fixing methods which lead to a desired anchoring of the core at the shell.
To direct away compressed air, in particular in the case of press-fitted cores, in an ageous
embodiment the core has bevels or s on its outer surface running from the rear end up to
the front end of the shell, el to the projectile longitudinal axis. In another embodiment, a
bore hole is arranged in the partition wall, connecting the front receiving space to the rear
receiving space. This also directs away the compressed air formed during impact of the projectile
on a hard e. A blind hole with a connection to the front receiving space can also be
constructed in the partition wall. This blind hole also functions to reduce pressure.
In a specific embodiment, two circumferential predetermined breaking points g around
the circumference of the shell are formed in the shell in the region of the ion, wherein one
predetermined breaking point is formed in the rear end of the partition wall, as seen in the
direction of flight. The predetermined breaking points are preferably formed at a right angle to
the projectile longitudinal axis, and are V-shaped or U-shaped in cross-section. These
predetermined breaking points improve the tation behavior.
In a specific embodiment, the inner wall of the front receiving space has one or more s
which are parallel to the projectile axis or run in a spiral pattern. This improves the anchoring of
the frangible core in the front ing space.
The invention and other features thereof are explained in greater detail below by way of nonlimiting
embodiments and with reference to the accompanying drawings.
4. BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 illustrates a prior art projectile, one in partial section, as described above;
Figure 2 illustrates in longitudinal section a first embodiment of a projectile according to
the invention;
Figure 3 illustrates schematically forces and res arising upon impact of a projectile
according to the ion on a hard surface; and
Figure 4 illustrates in udinal section another embodiment of a projectile according to
the invention.
. DETAILLED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION
Figure 2 rates in longitudinal section a first embodiment of a projectile according to the
invention, ting of a shell 4 made of brass and a frangible core 1. The shell 4 has, seen in the
direction of flight 19, a front cylindrical receiving space 4a and a rear cylindrical receiving space4b
in the projectile tail 11. The front receiving space 4a is formed from the front, and the rear
receiving space 4b is formed from the rear, of the shell 4. Both receiving spaces 4a, 4b are
arranged coaxially with the projectile longitudinal axis 15 of the projectile, and are separated
from each other by a ion wall 16. The partition wall 16 forms the floor of the front receiving
space 4a. The ble core 1 is inserted into the front receiving space 4a, and anchored therein,
preferably via a press fit. The front tip 17 of the frangible core 1 projects out of the front receiving
space 4a and/or the shell 4. A tracer composition (not shown in the figure) is inserted in one
ment of the invention in the rear receiving space 4b. A groove providing a predetermined
breaking point 2 is formed in the shell 4 adjoining the partition wall 16 and extends around the
circumference of the shell 4. This predetermined breaking point 2 is formed at a right angle to
the projectile longitudinal axis 15, and can have a rectangular cross-section, as shown. However,
a V-shaped predetermined breaking point 2 is preferred, as shown in the tile embodiment
of Fig 4.
The external geometry of the projectile, consisting of ble core 1 and shell 4, largely
corresponds to a known and proven short-range projectile of the applicant. This projectile meets
requirements in terms of precision, loading safety, and trajectory. The risk to the surroundings is
reduced by two systems. On the one hand, core 1 which is made of frangible material is inserted
into the shell 4 from the front, as seen in the shooting direction. A “frangible core” means a core
which breaks apart—for e, to dust—upon impact with a hard target. On the other hand,
predetermined breaking points 2 are formed at the tile tail 11 so that the residual mass of
the individual parts corresponds at most to the mass of a conventional small-caliber projectile.
The shell 4 of the projectile is advantageously made of brass. With brass as the shell material, the
projectile according to the invention will largely be broken apart to dust upon impact. This was
surprising for a person skilled in the art, and not predicted. Upon the impact of the projectile 5
against a hard target 17 (see Figure 3), the frangible core 1 is pressed into the shell 4. During this
pressing, the frangible core 1 abruptly produces a high hydrostatic pressure (see arrows 20 in
Figure 3). This causes a splintering of the majority of the projectile. The brass of the shell 4
naturally demonstrates a brittle behavior over such a short stress period. The xial stress
state when the frangible core 1 bursts also supports the brittle behavior of the brass of the shell
4. In this way, the impact energy is reduced to an extreme degree, and nearly negated. The rest
of the projectile then breaks apart into lighter parts as consequence of the presence of the
defined predetermined ng point 2. These individual parts have very low sectional density
due to their ry. This significantly decreases the risk to the surroundings. In a particularly
advantageous solution, the frangible core 1 of the projectile is a sub-caliber projectile which is
simply inserted into the front receiving space 4a. The attachment between the shell 4 and the
ble core 1 can be realized by means of an adhesive or through press fit. If a press fit is
selected, lateral bevels on the core can direct the ssed air away. A r ility is
that the ssed air is ed away, when the projectile is assembled, by a bore hole in the
projectile longitudinal axis 15 through the partition 16, or by a blind bore in the partition wall, so
that the pressure can be minimized. The projectile tail 11 is also made of brass, since brass is
suitable for press-fitting tracer compositions.
Figure 4 shows another embodiment of a projectile 5 according to the ion, consisting of a
shell 4 made of brass and a frangible core 1. The shell 4 has in this case as well, seen in the
direction of flight 19, a front cylindrical receiving space 4a and a rear cylindrical receiving space
4b in the projectile tail 11. The front receiving space 4a is made through the front, and the rear
receiving space 4b is made through the rear, of the shell 4. Both ing spaces 4a, 4b are
arranged coaxially with the projectile longitudinal axis 15 of the projectile, and are separated
from each other by a partition wall 16. The partition wall 16 in this embodiment is substantially
r than in the embodiment of Fig 2. The partition wall 16 in this case also forms the floor of
the front receiving space 4a. The frangible core 1 is inserted into the front receiving space 4a,
and anchored therein preferably via press fit. The front tip 17 of the ble core 1 projects in
this case as well out of the front receiving space 4a and/or the shell 4. A tracer composition (not
shown in the figure) can be inserted in the rear receiving space 4b. A groove-like predetermined
breaking point 2a running around the circumference of the shell 4 is formed on the shell 4
adjoining the rear segment—seen in the shooting direction—of the partition wall 16. In the
embodiment shown here—also seen in the shooting direction—a further predetermined
breaking point 2b is also formed on the front t of the partition wall 16. The se
predetermined breaking points 2a, 2b are formed at a right angle to the projectile longitudinal
axis 15 and are V-shaped in cross-section.
Claims (10)
1. A projectile for short-range ammunition, comprising: a shell made of brass, the shell, seen in a direction of flight of the projectile, having a front cylindrical ing space and a rear cylindrical receiving space, both receiving spaces being arranged coaxially with a longitudinal axis of the projectile and separated from each other by a partition which forms a floor of the front receiving space; and a core made of a frangible al inserted into the front ing space, the core having a tip protruding out of the front receiving space, characterized in that at least one predetermined breaking point, which runs around the circumference of the shell, is formed in the shell in the region of the partition.
2. A tile according to claim 1, characterized in that a tracer composition is received in the rear receiving space.
3. A projectile according to claim 1 or 2, characterized in that the core is glued or press-fitted into the front receiving space.
4. A projectile according to any one of the claims 1 to 3, characterized in that the core has on an outside surface thereof bevels or s g parallel to the projectile longitudinal axis from a rear end thereof to the front end of the shell.
5. A projectile according to any one of the claims 1 to 4, characterized in that a bore hole extending through the partition wall connects the front receiving space to the rear ing space of the shell.
6. A projectile according to any one of the claims 1 to 5, characterized in that a blind bore is present in the partition wall and has a connection to the front receiving space.
7. A projectile according to any one of the claims 1 to 6, characterized in that two of said predetermined breaking points, which run around the circumference of the shell, are formed on the shell in the region of the partition wall, wherein one predetermined breaking point is formed at a rear end of the partition wall as seen in the direction of flight.
8. A projectile according to any one of claims 1 to 6, characterized in that the at least one predetermined breaking point is formed at right angles to the projectile longitudinal axis and is V-shaped or U-shaped in cross-section.
9. A projectile according to claim 7, terized in that the two predetermined breaking points are formed at right angles to the projectile longitudinal axis and are V-shaped or U- shaped in cross-section.
10. A projectile according to any one of the claims 1 to 9, characterized in that the front receiving space has an inner wall with one or more notches which are el to the projectile axis or run in a spiral.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14197363 | 2014-12-11 | ||
EP14197363.6 | 2014-12-11 | ||
EP15171573 | 2015-06-11 | ||
EP15171573.7 | 2015-06-11 | ||
PCT/EP2015/079198 WO2016091991A1 (en) | 2014-12-11 | 2015-12-10 | Projectile with reduced ricochet risk |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ733335A NZ733335A (en) | 2021-01-29 |
NZ733335B2 true NZ733335B2 (en) | 2021-04-30 |
Family
ID=
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7455015B2 (en) | Special purpose small arms ammunition | |
RU2362962C1 (en) | "tverityanka" splinter-in-beam supercaliber grenade | |
US9841260B2 (en) | Projectiles for ammunition and methods of making and using the same | |
US8468946B2 (en) | Low shrapnel door breaching projectile system | |
US8640622B2 (en) | Tandem nested projectile assembly | |
US20080223246A1 (en) | Burping projectile | |
US20160047638A1 (en) | Material based impact reactive projectiles | |
JP4713577B2 (en) | Lead free bullet | |
AU2015359428B2 (en) | Projectile with reduced ricochet risk | |
WO2012071011A1 (en) | A cartridged projectile | |
AU2023200529A1 (en) | Projectile with penetrator | |
FI86670C (en) | PANSARGENOMTRAENGANDE PROJEKTIL. | |
US20130087063A1 (en) | Cartridge and bullet | |
US8607708B1 (en) | Impact igniting incendiary device for projectiles | |
NZ733335B2 (en) | Projectile with reduced ricochet risk | |
US10502537B1 (en) | Enhanced terminal performance medium caliber multipurpose traced self-destruct projectile | |
SE1530091A2 (en) | Pre-fragmentation of combat section | |
RU2346230C2 (en) | "tverich" fragmenting-bundle shell | |
RU2800674C1 (en) | Rocket projectile with a penetrating warhead | |
RU2688654C2 (en) | Grenade to hand grenade launcher | |
RU2309372C2 (en) | Fragmentation-bundle projectile "otmich" | |
SE2000094A1 (en) | Projectile | |
ZA200603033B (en) | Piercing projectile | |
KR20040094385A (en) | The Shell accelerator with Inner Discharge system | |
BG973U1 (en) | Artillery round with sub-gauge armour-piercing projectile with an arrow-shaped core detaching along the trajectory |