DE2135301A1 - Practice floor - Google Patents

Description

AKTIBBOLAGET BOI ¹ OES, S-69020 Bofors / Sweden

Practice floor

The present invention relates to solo training shoes intended for shooting on firing ranges are provided with limited length. It is particularly for use in practice shooting provided in connection with anti-tank training, but should also be beneficial for others Purposes.

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209821/0524

Since most firing ranges for tank purposes have a very limited length, combat ammunition can usually not be fired because of their long range. Sabot bullets, which have a very high muzzle velocity, require in ^. Longitudinally a very large danger area and can therefore only be fired on special shooting ranges, whereby comprehensive safety measures, such as flight monitoring and other things, have to be taken. Bullets of this type are also complex and therefore expensive to manufacture.

The present invention relates to a full-caliber ee Training projectile with normal gun function with a normal for combat ammunition or ™ Can be fired at higher speeds and with great precision at the furthest distances correspond to the relevant Gefeohtsentfernen and - compared to combat ammunition duroh given a certain configuration a limited maximum range in relation to the shooting range and thus a shorter danger area. According to the invention, the training projectile is like this arranged that it is possible through a simple

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Measure the - therefore already limited, but adapted to larger shooting ranges - maximum shooting range of the training crew down to a maximum range, which is very small is adapted that the danger area lies within the length of these shooting ranges, the good precision is maintained. In this case, too, the projectile has a

distance from a comparatively small danger area.

The main characteristic of the invention is given in the characterizing part of the main claim. The other characteristics and advantages are derived from the subclaims linked to the main claim and the following detailed description of the invention in connection with the accompanying drawings.

Fig. 1 shows one fastened in a propellant charge case Projectile body, but without a mounting device for the tip piece.

Fig. 2 illustrates a projectile body provided with a holding device for a tip piece, wherein the tip piece on the one hand without and on the other hand a with a cone formation

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is shown. For better visibility the parts shown in section in these figures are not sectioned.

Pig. Fig. 3 shows in longitudinal section a tip piece and the front part of the projectile body.

W Pig. 4 shows one configured with a cylindrical part Practice floor.

The projectile body for a training body according to the invention is in principle as in Pig. 1 shown shaped. In the rear part it is designed in two ways, like the combat floor it is supposed to replace, and with a sealing ring 2, a choke ring 3 for the propellant charge case provided when loading and in particular α with rotation-controlled projectiles with a guide band 1.

The projectile body can at its tip with a plane 4 at right angles to the central axis, which essentially corresponds to the caliber diameter of the projectile be, which gives the bullet a great deal of air resistance when shooting without a tip piece and thereby a very limited maximum range. One not in

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the figure drawn holding device for a tip piece can in this case, for example consist of a central threaded pin on the projectile body, with the tip piece with a corresponding central threaded hole is equipped. The screw connection of the device can also be arranged the other way round be. With rotating bullets, the thread should have such a direction that the tip piece does not penetrate the rotation is unscrewed.

An embodiment that is more tortuous from several points of view is obtained, however, if the projectile body is formed with a recess 5 which is coaxial with this and is open to the nose. This recess causes on the one hand when shooting without a tip piece a stabilization of the projectile and on the other hand is thereby the possibility of adapting the projectile weight and thus the initial speed to a desired one Value given by suitable dimensioning of the recess in terms of depth, diameter and shape. Vice versa can of course, with a given starting speed, the maximum range of the projectile by a such dimension! Even with one Such a recess, the projectile has a large air resistance. The immigrant advantage is that the

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body is shaped like a "suction cup" through the recess 5 at its tip and is therefore at the Wants to hold onto the ground impact, with the result that very short ricochets or ricochets occur and the danger area is therefore limited.

The recess 5 also enables a more convenient holding device for the tip piece. According to Fig. 2, the Gesehosskörper 7 is in the front part the recess 5 is provided with a thread 8, the with a corresponding thread on a fastening part 12 projecting into the recess 5 of a conical Spitzdnetüokes 6 interacts, which is clearer from Pig. 3 emerges. You mounting arrangement for the Spitsenstück permitted * dal · »with a coaxial, after rear open recess 11 is formed, the purpose of which is to make the Spitzanetüek 6 as light as possible to keep it, making it little impact on weight distribution of the projectile takes. For the same purpose, the tip piece is preferably in a lightweight material executed, e.g. in an aluminum or magnesium alloy. A relatively large office knife at the Recess 11 is also used in conjunction with a mounting arrangement according to FIGS. 2 and 3 for another Purpose. The threaded fastener

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The tip piece thereby has a small wall thickness, whereby the tip piece tears and is knocked off when the bullet hits the ground at the tip of the buttock body, so that very short ricochets are obtained as when shooting without a tip piece. If necessary, the part of the tip piece at the tip of the projectile body can be weakened, for example, by turning off near the thread part visible in FIG. 3. ά

The conical shape of the tip piece, which tapers towards the front, considerably reduces the air resistance of the projectile. The tip piece is designed as a truncated cone 8 at the front, which helps stabilize the projectile. By adapting the size of the truncated cone 9 and the cone angle, the air resistance can be adapted to the desired range. This is also influenced by the weight of the projectile, which can be adjusted by dimensioning the size of the recesses 5 and 11. ^{By appropriately designing the projectile body and the} tip piece in this way, it has proven possible to achieve very good precision without a tip piece at very short distances and with tips u stüok at distances corresponding to the greatest combat distances that occur. There is also the possibility of designing a tip piece in this way, for example

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wise with a larger truncated cone 9 »that the projectile desired a position between the extreme distances Risk distance is maintained. If desired, the bullet can be supplied with two or more pointed pieces, which means the projectile can be adjusted gradually according to the desired risk distance, that is to say according to the size of the firing range, since the mounting device allows the point pieces to be easily removed from the body of the jesus can be or are to be used in these. To facilitate the work in this regard, this is Pointed piece provided with a wrench size 10, which two-way to one carried in another context Key is aligned.

In order to facilitate careful centering of the tip piece during installation, the projectile body is provided with a conical contact surface 15 at the mouth hole, W like the tip piece. This reduces the risk that forces resulting from poor centering can cause tearing at the weakened area in the fastening part 12 of the tip piece.

A projectile according to the invention can also be adapted in terms of weight and air resistance to the extent that that the projectile body with a so-called cylindrical

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Part is formed with a smaller suroh knife than the surrounding tenon parts make up the greater part of the length of the projectile body. Except for one more With a reduced danger distance one gains less pipe wear, furthermore such a shape includes a, especially with projectiles with larger caliber an important advantage that it counteracts a tendency that occurs with rotation-controlled projectiles prevents the projectile from occurring due to gyroscopic forces in the last part of the trajectory the tip near the bottom to face the ground. Since the gyroscopic forces increase with the moment of inertia, the cylindrical part 15 decreases their ability to keep the projectile from touching the ground with the point first, which is a requirement for the "suction cup" effect mentioned above.

In order to prevent damage in the drill from the joint between the buttock body and the tip piece, the lateral surface is de * body 7 designed conically on its end wall 14.

Other embodiments than those described above are also within the scope given by the patent claim the invention possible. For example, the mounting arrangement for the tip piece can be of a different type.

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receive dung. The projectile body and the tip piece can, for example, be designed in such a way that the tip piece is attached to the outside of the body and therefore the body Mouth hole covers. Instead of a threaded terbandee between the parts can be of any kind. Think of the bayonet socket, which, at least on rotating projectiles, should expediently be supplemented with longitudinal guide grooves in order to prevent mutual rotation between the parts.

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20982 1/0524

Claims (10)

Claims Practice projectile, provided for shooting at shooting ranges of limited length, characterized in that for the controllable limit of the maximum range of the projectile or of the danger zone to the length of different shooting places an in overall * shot contained projectile body (7) with a mounting means (8) for the front Projectile part, hereinafter referred to as the tip piece (6), is provided which, with a known, forwardly tapering, for example conical design, gives the projectile a relatively low air resistance adapted for shooting on larger practice areas, the holding device (8) allowing that the top piece (6) is easily accessible from the projectile body (7) is detachably formed so that it is without top piece to the projectile a fully fashioned Neren for shooting at small% practice sites relatively high air resistance. 2. exercise projectile according to claim 1, characterized characterized in that the holding device (8) for the tip piece (6) allows this to easily against a another tip piece can be exchanged, which is so - 12 209821/0524 is shaped to give the projectile an air resistance adapted for shooting on medium-sized practice areas conveyed. 3. Training projectile according to claim 1 or 2, characterized in that the projectile body with one lying in a plane perpendicular to the central axis of the "body front end edge is designed and a recess coaxial with the projectile body, open near the front (5) Has. 4. Practice floor naoh claim 3, characterized in that that the holding device (8) of the Projectile body from a screw thread preferably arranged in the recess (5) for cooperation with there is a corresponding screw thread on the tip piece. 5. Practice floor naoh claim 4, characterized in that that the projectile body (7) and the Pointed piece (6) each with their for their concerns against each other provided, conically ais-shaped contact surface (13) are provided. - 13 - 209821/0824 - 6. Training projectile according to one of the preceding claims, characterized in that the Gesehoss- body (7) is designed with a so-called cylindrical part (15) which has a smaller diameter than the surrounding pin parts take up a larger part of the length of the g-eso body. 7. Training projectile according to one of the preceding claims, characterized in that the lateral surface of the projectile body (7) has a conical end wall (H) hai. 8. Training projectile according to one of the claims 3-7, daduroh marked that the tip piece (6) is formed with a coaxial, rearwardly open recess (11) with such a diameter that a for example at the contact surface (13) of the tip piece to the projectile body (7) and for knocking off sufficient attenuation of the tip pieces is formed. 9. Exercise body according to one of the preceding claims, characterized in that the tip piece (6) is made of a light material, for example an aluminum or magnesium alloy. H 209821/0524 10. Practice floor according to one of the preceding Claims, characterized in the dal Spitzenstüok (6) has a reclaimed key width (10) · 209821/0524