DE2151607A1 - Ballistic projectile - Google Patents

Description

Munich, the I5. H). IO7 66/001

Direccion General de Investigacxon y Desarrollo (DIGEI)) Ministry of Defense of the Argentine Republic, San Jose

Buenos Aires , Argentina

Ballistic projectile

The discovery concerns a ballistic projectile Self-propelled for a firearm with a rifled barrel that leaves no residue after being fired, ordering from inner shell of cylindrical-ogival shape, (a propellant charge located in the shell and a primer for the same.

The usual cartridges for firearms consist of a cartridge case, a projectile attached to the front end of the case, a propellant charge within the case and a primer at the bottom of the case. These cartridges are loaded into di "chamber of the firearm and the Absi ¹ JmIi drives" lie propellant charge the Geechoü by tien I.auf the firearm "The sleeve remains in the chamber and must be of {and ejected or automatically before the next bullet can be fired.

Dr.Hk/Du.

209817/0970

SAD ORiGfNAL

Much effort has already been put into the construction of the ejector device, but inhibitions still occur. In addition, the fire resistance is reduced by the required ejection of the cartridge cases.

Apart from this, the manufacture of cartridges is cumbersome and expensive because of the need to assemble several independent parts. The actual projectile also accounts for only a fraction of the total weight and the space required by the cartridge, which is why the storage and transport costs in relation to the effectiveness of the ammunition are left in the country.

Efforts to improve firearm munitions lately have mainly been directed toward reducing barrel erosion and improving ballistic performance.

Hei use solid runs must be the AuOendurchmesser the projectile slightly larger "Is" read caliber to grant the swirling motion to dom projectile Fields between trains cut into the Geechoßliülle, -to ensure u "safe guidance of the projectile. As a result , the running wall is subject to severe erosion.

- \ - SAD ORIGINAL

209817 / 097D

For the reasons discussed above, there are several attempts
It has been undertaken to develop a self-propelled ballistic projectile that leaves no cartridge case or other residue after leaving the barrel. These attempts have so far been unsuccessful, namely
mainly because the self-propelled projectiles operate on the same principles as normal ammunition
were built, i.e. with a larger diameter of the bullet casing than the caliber of the barrel. By this oversizing of the projectile casing and the firing pressure under the λ
the resulting expansion of the same, the barrel wall was attacked very quickly, the kinetic energy of the projectile was reduced and the loss of gas through the locking chamber was too great.

Other attempts to solve the above problem were the development of an automatically burning cartridge case, but this leads to other problems that this solution

have so far doomed to utter failure. '

The object of the invention is therefore to develop a
self-propelled ballistic projectile of the type specified above, which does not develop excessively high launch resistance and consequently does not attack the barrel wall too strongly,

-k-

209817/0970

To solve this problem, the projectile according to the invention is designed so that the projectile shell is the same or approximately has a smaller maximum diameter than the caliber of the firearm and that an edge formed on the floor of the projectile has a larger diameter than the caliber of the firearm.

These measures ensure that when the B is fired, the edge formed on the projectile engages in the trains and forces a twist on the projectile, while the projectile shell expands under the gas pressure and lays against the fields of the barrel, so that the C can be safely guided ₁ floor is guaranteed.

This principle can be applied to ammunition for a large caliber range can be applied and is for the most diverse Types of firearms suitable, e.g. H. portable, automatic, semi-automatic and artillery weapons.

The main advantages of the invention are that none The cartridge case must be ejected and that noise erosion is reduced. Other advantages «* are:

1. Muzzle velocity higher than the speed of sound with a corresponding increase in the impact energy;

209817 / Π970 ^BAD ORi

2. Higher offensive power because the entire projectile body hits the target;

3. Less recoil of the firearm; k. Low manufacturing costs;

5. Simpler construction of the firearms used for firing because of the omission of the ejector device;

b. Higher rate of fire;

7. Lighter weight, less cargo space and lower transportation costs;

8. Better water and moisture resistance.

An embodiment of the invention is shown below described on the basis of the drawing. Here are:

FLg. I a partially sectioned side view of a he proper storey,

FIG. 2 shows the schematic representation of the floor in FIG Lock chamber of a firearm in front of the Abschtifo,

2Q9R17 / n970 _βΑΩ

3 shows a section along the line ITI-TIT in FIG. 2,

Fig. H shows a representation similar to Fig. 2, but immediately after the launch,

Fig. 5 is a section along the line V-V in Fig. 'T

and
Fig. 6 is a perspective view of the projectile immediately after launch.

The self-propelled ballistic projectile shown in FIG. 1 consists of a one-piece projectile casing 1, preferably of a cylindrical-ogival shape, with an ogival or cylindrical-ogival cavity 2 for the propellant charge. The charge cavity is closed at the bottom of the projectile casing by an ignition capsule 3, which is central. ignition or edge ignition can be formed. The primer 3 is supported against a shoulder h in the inner wall of the projectile casing. The cavity 2 contains di-propellant charge 5 »which can consist of normal gunpowder.

At the bottom end of the projectile shell 1 is a circumferential edge 6, which is perpendicular to the longitudinal axis of the Ge-- . shot runs, molded onto the shell. The outside diameter of the edge b is larger than the outside diameter

209817 / Π370

of the cylindrical part of the shell. diameter and the thickness of the rim 6 depend on the caliber of the bullet.

In Fig. 2, the projectile in the breech chamber C is one Firearm shown before launch. The barrel 7 of the firearm has a series of parallel helical ones Trains 8 with spaces 9 between them.

In the position of FIG. 2, the edge 6 of the projectile rests against a stop shoulder 10 in the chamber. As can best be seen from FIG. 3, the outer diameter of the bottom cover is equal to or preferably slightly smaller than the caliber, ie the inner diameter of the barrel from fold to field. Heispie 1 sv / otherwise the air gap between ilen fields ^c ) and the projectile envelope is about O, O0 (> mm.

Fig. 4 shows the projectile immediately after firing by igniting the primer 3 by means of the firearm's firing pin, not shown. As in Fig. B am best shows, the edge 6 of the projectile is deformed by the fields of the barrel and screwed into elie trains a. This creates the spin of the projectile. Nearly at the same time, the shell of the bullet expands under the Abs - 'hussd-ru - k spawns and lies down against the fields,

-S-

209817 / Π970

which maintain and guide the twisting movement of the bullet until it runs through the muzzle leaves. As FIG. 6 shows, helical grooves are formed on the surface of the projectile casing.

As can be seen, the edge 6 acts as a stop in the chamber before the projectile is fired and during the passage of the bullet through the barrel as a guide ring. It also helps stabilize the projectile after leaving the barrel "

The sectional view in Fig. 5 shows schematically the Deformation or expansion of the projectile suffered when passing through the barrel. The gap between the ground the trains and the edge 6 is denoted by 12.

The remains of the primer 3 verden together with the projectile ejected through the barrel. Various primer cap designs are conceivable that meet this requirement; there is no need to go into this further. The detonator can either be on the ground or in a known manner be arranged at the top of the cavity for the propellant charge.

-9-

209817/0970

The bullet casing is preferably made from a brass alloy, although other suitable metals are also used can be.

The performance of the self-propelled projectile according to the invention were compared with normal ammunition of the same and different caliber.

The projectile according to the invention examined had the following features:

9 mm caliber

Total length 27 mm

Weight (loaded) 6010 mg

Propellant charge 33O mg

The test results are shown in the attached table.

The tests have shown that the muzzle velocity of the projectile according to the invention is clearly in the supersonic area and was considerably higher than that of all the ammunition compared. The recoil energy the projectile according to the invention, on the other hand, was considerable less than that of ammunition of the same caliber.

-10-

209817/0970

- 10 -

Ballistic tests carried out in a subsonic channel showed that the projectile according to the invention is a had excellent ballistic stability; d. H. its center of gravity followed a fixed path after the projectile 3 left the barrel and the propellant had burned out.

The stability conditions of the bullet were also checked using Cranz's equations.

It was found that the ogival or cylindro-ogival Shape of the propellant charge space 2 a better utilization of the explosion energy developed in the projectile allowed, so that a lower propellant charge is used than with ordinary ammunition of the corresponding caliber can be.

209817/0970

Tabel

Test no. 279 2600 ¹ 280 281 282 283 Ammunition type and
Kaiiber C.22
long
DGFM default I.
(
3.32
Long
3GFM c.32
long
Iorbea (tm) C.9
PAM
DGFM C9
invented
manic
according to 3 Initial speed
age 3 ^ 8 Winchester
run
O, 53 m 270 311 327 <* 55 Λ Initial energy
(kg πι) 15th 23 31 59 Recoil energy
(kg m) - 0.260 0.308 0.5OO 0.430 Ilynamometerweg
(πι) - 0.2Ul 0.28 * 4 O _# UfaO 0.372 Bullet weight
(mg) 63ΟΟ 63ΟΟ 8100 6010 Propellant charge default default default normal
Hunt-
shoot
powder
FANAZUL
(TM) I Remarks - special
run
O, 18 m how
before PAM
default
run Ka
liber <> how
before

⁺ DGFM: Direccion General de Fabricaciones Militares

209817/0970

Claims (2)

Munich, the I5. 10. 1971 66/001 Direccion General de Investigacion y Desarrollo (diGID) Ministry of Defense of the Argentine Republic, San Jose Buenos Aires, Argentina claims 1.) Self-propelled ballistic projectile for a firearm with a rifled barrel, which leaves no residue after firing, consisting of a projectile casing of cylindrical-ogival shape, a propellant charge located in a cavity of the projectile casing and a detonator for the same, characterized in that the bullet casing (1) has the same or slightly smaller maximum diameter than the caliber of the firearm and that an edge (6) formed on the base of the bullet has a larger diameter than the caliber. 2. Projectile according to claim 1, characterized in that the cavity (2) for the propellant charge ogivale or cylindischogivale Has shape. 209817/0970