DE2738121A1 - RIFLE CARTRIDGE WITH A PLASTIC COAT ENCLOSING THE LOWER CALIBER BULLET - Google Patents

Description

File η 657 'Düsseldorf, August 23, 1977 Bi / large

Rifle cartridge with a plastic jacket surrounding the lower caliber bullet

The invention relates to a rifle cartridge with a sub-caliber bullet enclosing and axially parallel Plastic jacket provided with predetermined breaking points, which extends behind the floor of the floor to form a sabot accommodating the sabot ü cavity extends.

DT-PS i 262 830 discloses a sub-caliber bullet, in particular one encased in a plastic jacket Projectile become known, the bottom of which is supported against a sabot. The latter is with one provided a cylindrical cavity with which it tightly encloses the lower part of the projectile.

From the inside, the plastic jacket is made up of several lengthways Weakening grooves provided as predetermined breaking points and a conical recess at the tip of the jacket.

This sub-caliber bullet, whose low weight in an unfavorable weight ratio to the sabot on the one hand and to the rather massive plastic jacket on the other is in the dismantling and separation of the parts surrounding it strong interference in relation to the

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Exposed plug stability. Another disruptive factor for the projectile is the inevitable guidance in the sabot bore, since any harmful influence on the sabot, for example by one's own imbalance or by irregular detachment of the segments the flight characteristics of the projectile adversely affected to an increased extent. It can be due to the large distance from the center of gravity of the projectile to the sabot to a strong pendulum swing of the projectile flying as a unit, Sabot and plastic sheath existing mass come. The spread and the hit pattern leave a lot to be desired.

The invention is based on the object of a rifle cartridge with a lower caliber bullet, the latter up to the end of the acceleration phase approximately at the muzzle through the To let drive sabot or sabot, but then abruptly break off the connection to the projectile, so that the projectile without the slightest interference or distraction can fly towards the target.

According to the invention, the object is achieved in that the plastic casing is the sabot made of light metal encloses up to its bottom flange and such interlocking profiles on the outer surface of the sabot and are provided on the inner surface of the plastic jacket, that on the one hand an interaction with the barrel interior a form-fitting connection between the plastic jacket and Sabot can be produced up to the muzzle, while on the other hand the decomposition due to centrifugal forces of the plastic jacket starts from the tip in the barrel, whereby the under-caliber head of the plastic jacket by tearing open the predetermined breaking points with its segments applied radially against the barrel wall and after

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Leaving the barrel a rapid spreading of all segments of the plastic jacket follows, in such a way that as soon as it is reached The connection with the sabot is terminated at a spread angle of 30 °.

According to another feature of the invention, the predetermined breaking points of the plastic jacket extend from the tip to the bottom flange.

According to a further feature of the invention, an air inlet opening is incorporated into the tip of the plastic jacket, To support the projectile, the sabot has a flat surface, the surface of which extends beyond the projectile diameter and serves as a support surface for the plastic jacket.

Finally, the twist is transmitted between the sabot and the projectile by means of a device that engages the floor of the projectile Driver.

A preferred embodiment of the rifle cartridge with a plastic jacket surrounding the lower caliber bullet according to the invention is shown in the accompanying drawing und'zwar show

Fig. I a sub-caliber bullet with sabot and Plastic jacket before launch in longitudinal section,

Fig. 2 shows the projectile shown in Fig. 1 after the launch shortly before reaching the muzzle and

Fig. 3 shows the projectile after leaving the muzzle with the sabot and plastic casing peeling off.

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Se $ choQ A, which is cylindrical about half its length, around

6end £ rt leak a somewhat flattened top, Jit. b> or provided with a slot la on the inside. A plastic jacket -2 extends over the entire length of the projectile and is shaped like the projectile 1 in that it also has a head 2b that is tapered compared to the cylindrical M component part 2a, which incidentally corresponds to the caliber. As can be seen from Figures 1 and 2, the plastic jacket 2 has on its circumference several axially parallel predetermined breaking points 3, which are cut so deep that the plastic jacket 2 remains irJialten during transport and loading of the cartridge, but which is then under the action of the. ^ Zejttrifugel Forces quickly broken down into its segments. With its rear cavity located behind the floor of the floor, the plastic jacket 2 encloses a correspondingly designed sabot 4, which is made of light metal and is captive in the plastic jacket 2 by interlocking snap connections. The sabot 4 consists at its end facing the projectile 1 from a full plane surface 5 and is provided at its rear end with a bottom flange 4a, against which the plastic jacket 2 is supported. From the rear, a blind hole 4b is machined into the sabot 4, which ends in an undercut 4c on the inside. The blind bore 4b with the undercut 4c serve to receive and fix the cartridge case 7, the case mouth 7a of which is precisely matched to the blind bore 4b and the undercut 4c, so that a snap connection is established in the area of the undercut 4c, which fixes the cartridge case 7.

The sabot 4, from the propellant gases of the propellant charge powder in the cartridge case preferably made of plastic 7 driven, runs through with the plastic jacket 2

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the rifled barrel 9 and thus also receives the twisting movement which is transmitted by a driver kd seated on the sabot k and engaging in the slot la of the projectile 1.

2 clearly shows the acceleration phase that occurs after the launch, in which the unit consisting of the projectile 1, the plastic jacket 2 and the sabot k has detached itself from the case mouth 7a of the cartridge case 7 in a closed manner.

As a result of the centrifugal forces still taking effect in the barrel 9 and the air jam directed towards the air inlet opening 2c, the predetermined breaking points 3 tear in the head area, with the head ends lying radially outward against the barrel 9. Since separation processes between the plastic jacket 2 and sabot h on the one hand and the projectile 1 on the other hand can already be initiated in the barrel 9, it seems absolutely necessary that the separation take place spontaneously as soon as the acceleration phase at the barrel muzzle 9a has ended. In fact, the predetermined breaking points 3 tear in front of the barrel muzzle 9, so that the individual segments of the plastic jacket 2 are spread further. Even at a comparatively small spread angle of 30 °, the snap connections 6 are canceled, so that none of the detached parts touches the other and thus influences them. This ensures that the sabot k drives the projectile 1 with its plane surface 5 until the end of the acceleration phase, in order to then slow down and lag behind. This orderly detachment of the sabot k and of the plastic jacket 2, which can be achieved in several stages, forms the prerequisite, but also the guarantee for an optimal target flight of the projectile.

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Claims (5)

File R 657 * Düsseldorf, August 23, 1977 Bi / large Claims Rifle cartridge with a plastic jacket surrounding the lower caliber bullet and provided with axially parallel predetermined breaking points, which extends behind the floor of the bullet to a cavity receiving the sabot, characterized in that the plastic jacket (2) extends the sabot (k) made of light metal up to its bottom flange (da) encloses and such interlocking snap connections (6) are provided on the outer surface of the sabot (h) and on the inner surface of the plastic casing (2) that on the one hand an interaction with the inside of the barrel creates a positive connection between the plastic casing (2) and sabot (h) up to The barrel muzzle (9a) can be produced, while on the other hand, as a result of the centrifugal forces, the decomposition of the plastic jacket (2) from the head in the barrel (9) already begins, with the sub-caliber head (2b) of the plastic jacket (2) tearing open the predetermined breaking points (3) with its segments rests radially against the barrel (9) d after leaving the barrel (9) a rapid spreading of all segments of the plastic jacket (2) follows, in such a way that already when a spreading 909809/0418 ORIGINAL INSPECTION _ 2 - ν- 3 SSMEIi;? R.V, ~ ': au V, The connection with the sabot (k) is ended at an angle of 30 °. 2. rifle cartridge according to claim 1, characterized in that the predetermined breaking points (3) of the plastic jacket (2) from Extend the head (2b) to the bottom flange (^ a). 3. rifle cartridge according to claim 1 and 2, characterized in that in the head (2b) of the Plastic jacket (2) an air inlet opening (2c) is incorporated. H. Rifle cartridge according to claims 1 to 3, characterized in that the sabot (h) has a flat surface (14) serving to support the projectile (1), the surface of which extending beyond the diameter of the projectile serves as a support surface for the plastic jacket (2). 5. rifle cartridge according to claim 1 to k, characterized in that the twist transmission between sabot (h) and projectile (l) takes place by means of a in a slot (la) of the projectile base (l) engaging driver (kd) . 909809/0418