EP0319877A2 - Spin-stabilised subcalibre training projectile - Google Patents

Abstract

For hitting targets with projectiles of flat trajectory, a hit pattern comparable to the live projectiles is required on a target board. To prevent a training projectile used for this from being damaged in such a way that part of the projectile goes beyond the safety zone after the target board, a compact projectile (1) with a non-round cross-section (12) is proposed. This cross-section (12) is formed from three arc segments (11). <IMAGE>

Description

The invention relates to a spin-stabilized, sub-caliber training projectile, which has circumferential means that reduce the speed of the projectile on the trajectory from a certain shooting distance in such a way that the projectile has a relatively short remaining trajectory.

From the German patent 32 01 629 a spin-stabilized projectile is known, the speed of which is reduced by means of small wing strips on the trajectory so that its range is drastically shortened as a result of instability phases from a predeterminable shooting distance. When striking target structures, the parts that break down the swirl may break off. As a result, the effect of shortening the trajectory is not achieved.

The invention has for its object to propose a projectile that survives the penetration of target structures, such as steel frames for target plates, undamaged and there is a reduced-range trajectory.

The invention solves this problem in accordance with the characterizing features of claim 1.

Advantageous further developments can be found in the subclaims.

The sections that are decisive for the swirl reduction are break-resistant and their effects are not significantly reduced in the event of damage.

• Fig. 1 ein Übungsgeschoß mit einem aus Kreisbogen gebildeten Abschnitt;
• Fig. 2 einen Schnitt II-II nach Fig. 1;
• Fig. 3 ein Geschoß mit ebenfalls aus Bogenabschnitten gebildetem Querschnitt;
• Fig. 4 das Geschoß nach Fig. 3 in der Ansicht;
• Fig. 5 bis 9 verschiedene Querschnitte von Übungsgeschossen.

Embodiments of the invention and their advantages are described with reference to the drawings.
It shows:

• Figure 1 is a training floor with a section formed from an arc.
• Fig. 2 shows a section II-II of Fig. 1;
• 3 shows a projectile with a cross section likewise formed from arch sections;
• Fig. 4 shows the projectile of Figure 3 in the view.
• Fig. 5 to 9 different cross sections of training floors.

According to FIGS. 1 and 2, a training projectile 1 has a section 2 with a conical tip 10, a section 3 with a cross section 12 formed from arc sections 11 and a projectile center of gravity 6, a section 4 with a recess 13, a cylindrical shaft 14, paragraphs 15 , 16 and in section 5 a circular collar 17.

Storey 1, which is to be fired from a large-caliber tank cannon and is made of steel, has the required rapid trajectory comparable to a sharp storey up to the intended target distance of 2.5 km. Accordingly, the required hit image is also available on the target plate. When the aluminum target plate breaks through, there are no projecting parts on the floor 1 corresponding to the longitudinal ribs according to the patent mentioned in the prior art; therefore the projectile 1 emerges unscathed from the target plate and now enters the reduced-range phase. In this phase there is already a reduced speed on floor 1.

The reduction in the projectile speed further caused by the section 3 causes the instability thereof, so that the projectile 1 falls to the ground prematurely. It is essential here that the projectile structure is retained even if the comparatively hard frame accidentally breaks through or if the projectile 1 bounces off. Likewise, the structure is essentially preserved when armored targets penetrate, so that the reduced projectile trajectory is then still present.

According to FIGS. 3 and 4, a projectile 20 has sections 21 with a projectile tip 22 and a section 23 with a projectile shaft 24. The projectile shaft 24 is formed from arc sections 11 in accordance with FIG. 1, section 3. These arc sections 11 end in the projectile tip 22.

5, a speed-reducing section 30 has a square cross section 31 with rounded edges 32 and straight sections 33.

According to FIG. 6, there is also a square cross section 35 with beveled edges 36 for a section 37.

7 shows a hexagonal profile 39 for a section 38.

8 shows for a section 40 a circular cross section 41 with four semicircular ribs 42.

9, a section 50 has an approximately circular cross section with ribs 51 arranged next to one another. These ribs 51 are semicircular.

All of the cross sections described have at least one axis of symmetry 7, see the cross sections according to FIGS. 2 and 4. The other cross sections have two axes of symmetry.

The choice of material for floor 1 depends on the ballistic necessity.

The non-circular cross-sections of the projectile allow the positive locking with a sabot. This ammunition is therefore also suitable for a barrel system for large-caliber weapons for target practice.

Claims (5)

1. Swirl-stabilized, sub-caliber training projectile, which has circumferential means which reduce the speed of the projectile on the trajectory from a certain shooting distance in such a way that the projectile has a relatively short remaining trajectory,
characterized,
that the projectile (1) has a non-circular cross-section (12) and the cross-section is symmetrical to at least one axis of symmetry (7). 2. Practice floor according to claim 1,
characterized,
that the cross-section (12 or 30) has a contour deviating from the circular shape and is formed by curved sections (11 or 32) and / or straight sections (33). 3. Practice floor according to claim 1,
characterized,
that the projectile (1) has in its rear section (4) a recess (14) which is delimited on the floor side by a shoulder (16) of a circular collar (17). 4. training floor according to claim 1,
characterized,
that it is made of steel. 5. Practice floor according to claim 1,
characterized,
that it is made of heavy metal.

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