EP0224636A1 - Practice projectile - Google Patents

Abstract

To reduce the noise annoyance by reducing the detonation report when the target is hit, a practice projectile 10 for high-calibre barrel firearms has a hollow charge 17 which is arranged inside the projectile casing 11 on the projectile bottom and which, when the target is hit, is loaded by a head igniter 12 and thereby blasts off the bottom of the projectile casing 11. To make the impact point more visible, smoke generated from an indicator charge 13 can escape from the orifice thus formed. <IMAGE>

Description

The invention relates to a training projectile according to the preamble of claim 1.

Practice bullets of the generic type are used to practice all weapon functions and to train the operating personnel up to the point of firing a shot and to check the accuracy of the shot by observing the bullet impact in the target area. Conventional training projectiles for large-caliber artillery weapons in the caliber range of 155 mm and 203 mm consist of a one-piece, rear-side projectile shell, which is identical to the combat projectile and is mostly filled with an inert charge instead of an explosive charge, as well as a small-volume explosive charge that can be activated by a detonator . This exercise floor, which was introduced under the type designation DM 28, penetrates into the soil in the target area and breaks down into small fragments. Before the detonation is triggered, there is a relatively strong earth ejection around the impact point, which, however, is difficult to see from greater distances. Signs of light and smoke associated with the detonation are also no longer recognizable from a greater distance of more than about 3000 m, so that the determination of the point of impact is very difficult. The introduced training floor is disadvantageously characterized, however, by an unpleasant detonation bang, which also makes the residents of spatially limited training places unacceptable bothered. For this reason alone, the night shots actually required to achieve a high level of operational readiness are no longer scheduled.

The invention is based on the object of specifying a training projectile for large-caliber barrel weapons using the bullet casing customary for explosive projectiles, which does not have the aforementioned disadvantages and which is particularly distinguished by a greatly reduced noise pollution and improved visibility of the point of impact.

This object is achieved, starting from a projectile of the type specified in the introduction, by the features specified in the characterizing part of patent claim 1.

Advantageous refinements and developments emerge from the subclaims.

That there is an urgent need to create a low-noise training floor is also evident from the magazine "Soldat und Technik" 7/1985, page 430. It reports on a training projectile developed in the USA, but without giving detailed information about the structure of the projectile envelope. As far as can be gathered from the information, it is not a case shell which matches the combat projectile, since deviating from this, smoke outlet openings are provided in the case of the training floor.

• Figur 1: ein erfindungsgemäß ausgebildetes Übungsge­schoß im Längsschnitt;
• Figur 2: einen Längsschnitt durch ein herkömmliches Übungsgeschoß.

The invention is explained below with reference to the drawing. It shows:

• Figure 1: a trained projectile according to the invention in longitudinal section;
• Figure 2: a longitudinal section through a conventional training floor.

A conventional artillery training projectile shows in longitudinal section. It consists of a one-piece, projectile shell 11 closed at the rear with a circumferentially arranged guide band 16, an inert charge 14 predominantly filling the interior of the projectile shell 11, and an explosive charge 20 arranged on the tip side, which is acted upon by a detonator 21 on target impact. The disadvantages of this conventional projectile were presented in detail at the beginning.

FIG. 1 shows in longitudinal section a training projectile 10 designed in accordance with the invention. In the one-piece projectile envelope 11, which is closed at the rear and corresponds to that of the combat projectile, a hollow charge 17 is initially arranged on the floor of the projectile with the direction of detonation thereof. This hollow charge 17 is activated by an igniter 15, which in turn is activated by a detonator 12 arranged in the head of the projectile 10, which is acted upon by means of an electrical signal or via a pyrotechnic ignition chain. The interior of the projectile shell 11 is largely filled with an inert mass 14 which also coaxially surrounds the shaped charge 17 and the detonator 15. Above the shaped charge 17, a central channel remains within the inert mass 14, which is filled with a deuterium charge 13, which for example produces a clearly visible smoke. The practice projectile 10 works as follows: when the projectile 10 hits the target area, the detonator 12 located at the top of the projectile shell 11 is first activated, which in turn either by means of an electrical connection 15 a or alternatively via a pyrotechnic ignition chain, the igniter 15 arranged in the rear area of the projectile shell 11, which in turn detonates the shaped charge 17 and simultaneously ignites the deuterium charge 13. The shaped charge 17 punches a hole in the solid floor from which the smoke emerging from the Deut Charge 13 emerges and thus marks the target point.

The practice floor 10 has the particular advantage that a significantly lower noise level than in the conventional practice floor according to FIG. 2 occurs. Since the shaped charge 17, when detonated, destroys the floor of the storey and can be reduced immediately by igniting the deuterium charge 13, further disassembly of the storey casing 11 can be avoided. Because of the much lower explosive charge, there is less noise pollution; furthermore, the earth is raised less than with the conventional training floor. Finally, it is avoided that the shell 11 disassembles into numerous small fragments. In addition, the point of impact can be determined much more easily, because a clearly visible smoke develops from the carried German charge 13, which can escape unhindered from the destroyed floor.

From FR-PS 712 390 a projectile is already known, in which a screwed-on floor of the storey is blasted off by an additional charge in order to better bring out a fire charge arranged in the storey. However, this is a combat missile with no consideration for reducing the detonation bang. Since the floor is screwed to the shell, it is also about a special projectile variant that is not compatible with the currently introduced explosive projectiles for large-caliber barrel weapons.

Claims (3)

1. training projectile with a one-piece, closed-end projectile casing, an inert filling, and a Deut charge, characterized in that a hollow charge (17) is arranged directly on the floor of the projectile casing (11) with detonation direction on it within the projectile casing (11), which, optionally with the interposition of a detonator or ignition amplifier (15) arranged at the rear, which can be acted upon by a head detonator (12) by means of an electrical signal or a pyrotechnic ignition chain. 2. Practice projectile according to claim 1, characterized in that the projectile casing (11) is at most partially filled by an inert charge (14) and the remaining space of the projectile casing (11) by a Deut charge (13). 3. Training projectile according to one of claims 1 and 2, characterized in that the inert charge (14) coaxially surrounds the shaped charge (17) and that the deuterium charge (13) is arranged in a central axial channel of the inert charge (14).

Images