DE1175576B - Projectile or grenade to be attached to the barrel of a firearm - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: F07f

German class: 72 d- 17/03

Number: 1175 576

File number: B 623501 c / 72 d

Filing date: April 29, 1961

Opening day: August 6, 1964

The invention relates to a grenade or projectile for attachment to the barrel of a Firearm, in particular an automatic or semi-automatic rifle, for firing a firing charge expediently provided in a special ammunition, the clip-on part of the projectile is provided with at least one passage or channel which is part of the into the interior of the Push-on part coming propellant gases allowed during the projectile path until separation from the Weapon to escape laterally into the open, creating a moment that sets the projectile in rotation arises.

In the case of projectiles of the aforementioned known type, there is an auxiliary motor for self-propelling the projectile not provided, so that the projectiles after the launch in the rotation around their axis very be dampened quickly and thereby the web stability is reduced.

On the other hand, it is known to put grenades or projectiles on the barrel to provide a firearm with an auxiliary motor for self-propulsion, the combustion gases of the Reaction drive of the projectile near the bottom of the push-on sleeve next to the same through nozzles into the open step and thus give the projectile a torque on the trajectory in addition to a propulsion. It is although the push-on sleeve through a small hole in the bottom with the combustion chamber of the self-propelled Projectile connected, but this hole is only used to drive the fuel or rocket motor of the Projectile to the launch cartridge through a small amount of gas passing through the bore ignite.

The object of the invention is, in addition to the above-mentioned swirl effect of the launch charge an additional bullet on the clip-on projectile during the launch and continues on the trajectory to generate effective torque through part of the combustion gases of the self-propulsion system.

This is achieved according to the solution according to the invention in that the above-mentioned projectile has a rocket motor known per se for self-propulsion, the nozzle of which opens into this at the floor of the plug-on part on the projectile side and that, as soon as the self-propulsion comes into operation, a part of the from the Self-propelled gases coming out through the same channels as the gases of the launch charge, so that the projectile continues to be driven in the direction of rotation. This means that the clip-on projectile is immediately ready for attachment when it is fired by the combustion gases of the launch charge and by the combustion gases of the projectile or grenade
the barrel of a firearm

Applicant:

Brevets Aero-Mecaniques S. A., Geneva (Switzerland)

Representative:

Dr. H. Wilcken, patent attorney,
Lübeck, Breite Str. 52-54

Claimed priority:
Luxembourg from May 5, 1960

Self-propelled within a very short time in rapid rotation and thus receives from the beginning the projectile trajectory on which the stabilization surfaces are not yet effective, a corresponding one Web stability. After the grenade has left the gun barrel, the combustion gases generate the Self-propelled continues to provide a stabilizing torque.

The invention is explained with reference to the drawing on the basis of exemplary embodiments. It shows:

Fig. 1 in an axial section with a break away of parts the rear section attached to the barrel of the firing rifle according to a first embodiment of the invention trained self-propelled grenade;

FIG. 2 is a section along line H-II of FIG. 1 on a larger scale;

FIGS. 3 and 4 show the same representation as FIG. 1 and 2 show another according to a second embodiment the invention trained self-propelled grenade;

F i g. 5 shows in the same representation as FIG. 1 according to a third embodiment of the invention trained self-propelled grenade;

Figs. 6 and 7 show in one seen from the side Partial view or in section along the line VII-VII in FIG. 6 according to a fourth Embodiment of the invention trained self-propelled grenade.

The grenade is used for its launch ζ. B. at the end of run 1 of an automatic or semi-automatic

409 639/59

automatic rifle (or possibly on a muzzle brake present at the end of the barrel).

The grenade is arranged one behind the other, as shown in FIG. 1, a warhead 2 and a (e.g. powder powered) rocket motor 3. This arrangement is to the rear (in the drawing downwards) by a push-on part 4, which is attached to the end of the barrel 1 can, and into which the nozzle of the rocket motor opens.

In Fig. 1 and 2 as well as in FIG. 5 to 7, the push-on part 4 is pushed onto the end of the barrel while it is inserted in FIGS. 3 and 4 into the bore of a shooting cup 5 attached to the end of the barrel is. The invention is applicable to both of these solutions, but the former is preferable, in particular because they allow easy attachment of a tail unit 6 to the rear end of the clip-on part Forming socket and because a rifle can be used for firing, which with a Muzzle brake 7 is provided, the openings of which from the plug-on part 4 at the moment of firing be locked. This solution is described below.

According to the invention, the push-on part has 4 channels 8, which are part of the inside of the push-on part Allow propellant gases that have entered, during at least part of the path of the projectile to escape into the open during its separation from the barrel, creating a moment which seeks to set the projectile in rotation. At the beginning, of course, there are only those from the launch cartridge generated gases are effective as soon as the self-propelled engine has come into operation the gases produced by his work in turn pass through the channels 8 and set the grenade in rotation.

It should be noted that this additional production of one revolution is achieved by that of the self-propelled motor gases resulting from the low speed the grenade has at the moment it leaves the launcher, is particularly advantageous. As is known, this speed is chosen to be relatively small to the To reduce recoil of the launcher, whereupon the projectile accelerated by the self-propelled motor will.

It is therefore important that the granting of a turn on the way to separation from the weapon persists so that the rotation speed can reach the desired value.

The channels 8 are preferably arranged so that the escape of the propellant gases at the latest at the end the first half of the way of the plug-on part 4 can begin with their separation from the weapon 1, or even better already during the first quarter of this walk.

As in the case of FIG. 3 and 4 arrangement shown, the channels 8 as a result of plugging remain locked during the first part of the way to separate from the weapon. However, you can also according to the in F i g. 5 solution shown at the beginning of this path can be opened and then remain open until the end of this path. In the first case, of course, the pressure in the push-on part decreases faster than in the second case, in which one, however, is less due to the departure produced disturbance of the web notices, since the departure is, so to speak, calmed down, while the recoil of the Weapon is decreased.

If finally, as shown in Fig. 1, the Push-on part 4 lies over a muzzle brake 7 attached to the end of the barrel 1, the can Channels 8 communicate with the openings of the muzzle brake during departure, like this clearly in Fig. 2 is visible. A dashed line at 9 in FIG. 1 game shown can be provided so that the gases can constantly reach the channels 8, which in reality is the same as that shown in FIG Solution boils down to.

So that the gas exit through the channels 8 generates a moment coaxial with the grenade, which thus given the grenade a rotary movement about its axis, any desired effect can be achieved generating solution can be used.

So z. B., as in FIG. 2 and 4, the channels 8 provided in the plug-on part 4 have the shape of nozzles whose position corresponds to that of the passages of a radial centrifugal turbine.

As in Fig. 7, the channels 8, which have any suitable position, can, however, also be used cooperate with outer walls 10 which are curved so that they are deflectors for those out of the channels 8 emerging rays, creating the desired moment.

It should be noted that in certain cases it may be useful to these walls 10, which are formed directly by the wings of the tail unit or can also be different from these, to give any shape, so when the grenade is on its way, the wings exert a moment around the axis as a result of the reaction of the air on the grenade, which depending on Can cause rotation in one direction or the other for the intended purpose. For this you can z. B. the walls in F i g. 6 have a clearly visible screw shape.

If the warhead is designed, especially if it carries a shaped charge, that a too fast rotation is not indicated, the walls or the tail unit can be given such a shape, that the original of the grenade intentionally generated by the gases emerging from the channels 8 Rotation is braked. So need z. B. to get the walls 10 no helical shape, or the slope it is given a value larger than that required to maintain the initial rotation speed the grenade would match. The rotation speed then increases in the desired Dimensions on the track.

The rotation given to the grenade at the beginning of its path improves shooting accuracy, and the Practice shows that the invention makes it possible to achieve a considerable reduction in dispersion.

The number and the cross-section of the channels 8 are of course determined by tests in each special case, that the desired results are obtained. These channels need the flow of gases brake enough to get the desired initial speed, but you must brake enough Let gas pass to make the projectile spin at the desired speed To give.

If necessary, firing ammunition with a reinforced charge can be used to

wanted dimensions to compensate for any decrease in the initial speed of the grenade, which could be generated by the escape of part of the gas through the channels 8.

The invention can be modified so that the launching ammunition is carried by the buttocks instead of being in the barrel of a firearm.

Claims (6)

Patent claims: 1. Projectile to be attached to the barrel of a firearm, especially an automatic one or semi-automatic rifle, to be fired by an expedient in a special ammunition intended firing charge, the plug-on part of the projectile with at least a passage or channel is provided which is part of the inside of the push-on part Approved propellant gases allowed ao during the projectile path until separation from the weapon to escape laterally into the open, creating a moment that sets the projectile in rotation arises, characterized in that the projectile is a known rocket motor (3) for self-propulsion, the nozzle of which is on the floor of the push-on part on the projectile side (4) flows into this and that, as soon as the self-propulsion system comes into operation, part of it comes out the self-propelled gases coming out through the same channels (8) as the gases of the Launch charge, so that the projectile continues to rotate in the direction of rotation. 2. Projectile according to claim 1, characterized in that the channels (8) for the exit of the Gases from the push-on part (4) are arranged so that the propellant gases escape at the latest begin at the end of the first half of the way of the slip-on part (4) until it is separated from the weapon (1) can. 3. Projectile according to claim 1, characterized in that the channels (8) are arranged so that it is open from the beginning to the end of the path of the plug-on part (4) on the weapon (1) will. 4. Projectile according to claim 1, for launching a weapon, the barrel of which in a muzzle brake expires, characterized in that the channels (8) of the plug-on part (4) at the beginning the launch of the projectile in a known manner with the openings of the muzzle brake (7) related. 5. Projectile according to claim 1, characterized in that the channels (8) in per se known Way have the shape of nozzles, the position of which is that of the channels of a radial centrifugal turbine is equivalent to. 6. Projectile according to claim 1, characterized in that in a known manner the channels (8) cooperate with outer surfaces (10) which are curved so that they are deflecting surfaces for the gases emerging from the channels (8), in such a way that an additional Torque arises. Considered publications:
German Patent Nos. 637 043, 940 813;
Austrian Patent No. 206 330;
French Patent No. 1 202 054;
British Patent No. 140 124;
U.S. Patent No. 2,883,781. 1 sheet of drawings 409 639/59 7.64 © Bundesdruckerei Berlin