DE102012005745A1 - Tail stabilized full caliber training projectile - Google Patents

Abstract

In order to ensure the impact resistance of a full-caliber training projectile (1) comprising a solid head part (3) and a tubular tail body (5) adjoining the head part (3) at a low cost, the invention proposes that the tail body (5 ) in such a way that the firing charge gases formed during the launching of the training projectile (1) also act on the outer side (6) of the side wall (7) of the tubular tail body (5). To avoid an outside bypassing the propellant charge gases on the training projectile (1) within the gun barrel, a sealing system (8) in the region of the solid head part (3) of the training projectile (1) is provided, wherein on the outside (9) of the head part (3) formed as a sealing surface surrounding area (10) is provided whose outer diameter is selected such that the head part (3) at the launch of the practice projectile (1) in this area (10) itself the sealing system (8). Preferably, in the sealing surface (10) is a groove seal comprising at least three axially spaced from each other, annularly arranged grooves (11).

Description

The invention relates to a ladder-stabilized full-caliber practice projectile which can be fired from a weapon barrel and which has a solid head part and a tubular tail body adjoining the head end on the rear side, the training projectile being provided peripherally with a sealing system.

Such a full-caliber practice bullet is from the document DE 10 2010 034 33 A1 known. It is a large caliber, for example, from a tank cannon with the caliber 120 mm shootable training projectile. In contrast to comparable well-known full-caliber practice projectiles, which usually comprise a head part with a subsequent projectile casing and a shaft with fin assembly adjoining the projectile casing, the projectile casing itself is formed as a tubular fin body in the aforementioned training projectile, so that a separate shaft may be omitted with attached fin assembly. The resulting at the launch of the practice projectile projectile charge gases reach in this full-caliber training projectile in the interior of the tubular tail body and act to accelerate the practice projectile on the rear-side region of the headboard, which limits the interior geschosskopfseitig.

To ensure that when shooting down in the DE 10 2010 034 33 A1 disclosed training projectile no propellant gases between the inner wall of the gun barrel and the outer wall of the training projectile can flow past this, is about the outside of a known sealing system arranged in the rear third of the tubular portion of the tail body. This consists essentially of a recessed into the outer surface of the tail body annular groove into which engages an existing plastic sealing ring.

When launching large-caliber practice bullets, a high internal pressure of the propellant charge gases occurs within the tubular tail body, which strongly acts on the side wall of the tubular tail body, in particular in the region between the sealing system and the head part. This can have an effect on the firing resistance, in particular when using a lighter body of a light metal.

The invention has for its object to provide a full-caliber practice bullet of the type mentioned, the firing resistance is ensured in a cost effective manner.

This object is achieved by the features of claim 1. Further, particularly advantageous embodiments of the invention disclose the dependent claims.

The invention is essentially based on the idea to dispense with a sealing system in the tubular portion of the tail body, so that the propellant gases formed at the launch of the training projectile also act on the outside of the side wall of the tubular tail body and thus acting on the outside of the tubular tail body pressure the counteracts the acting on the inside of the side wall of the training projectile internal pressure. To announce an outside bypassing the propellant charge gases on the training projectile within the gun barrel, a sealing system in the region of the massive head part of the training projectile is arranged. For this purpose, the head part has on its outer side a circumferential area designed as a sealing surface, the outer diameter of which is selected such that the head part itself forms the sealing system when the training projectile is launched in this area.

In this case, the deviation between the caliber of the weapon barrel, from which the training bullet can be fired, and the outer diameter of the head part in the area of the sealing surface should preferably be less than 0.2%.

In order to achieve a particularly good seal against a flow past the propellant charge gases on the head part, it has proved to be advantageous if at least one annularly arranged groove is provided in the sealing surface of the head part. This groove then causes turbulence of the propellant charge gases in the region of the sealing surface and thus acts as a groove seal.

The sealing effect of the groove seal is further increased if the sealing surface of the head part has at least three axially spaced-apart, annularly arranged grooves.

Since no separate sealing ring made of plastic is required in the inventive training projectile for the sealing system, the flight behavior of the training projectile is not negatively influenced by or even after leaving the gun barrel by peeling or possibly on the practice floor remaining plastic parts. Furthermore, there is no negative influence on the loading capacity by plastic parts in the temperature range for which such projectiles are usually designed (-46 ° C to + 71 ° C). In addition, relaxation problems are excluded.

Further details and advantages of the invention will become apparent from the following, explained with reference to figures embodiment. Show it:

1 the longitudinal section through an inventive, consisting of a headboard and a tubular tail body full caliber training projectile with sleeve cover and

2 a side view of the in 1 shown training projectile without sleeve cover.

In the 1 and 2 is with 1 designates a leitwerkstabilisiertes full-caliber practice bullet fired from a gun barrel, not shown. With the practice floor 1 is usually a sleeve cover 2 connected ( 1 ), the connection of the exercise bullet 1 forms with a propellant charge containing, not shown, the propellant charge.

The practice floor 1 includes a solid headboard 3 with a rear side arranged tracer body recording 4 and a back to the headboard 3 subsequent tubular tail body 5 ,

The tubular tail body 5 is inventively designed such that when launching the practice projectile 1 resulting propellant gases on the outside 6 the side wall 7 of the tubular tail body 5 Act.

For this purpose, the tail body 5 formed unterkalibrig and is supported in the charged state of the training projectile 1 verzugsweise the rear side via a guide ring, not shown, on the inner wall of the gun barrel. So that upon firing the propellant gases to the outside 6 can reach the tail body, the guide ring has a plurality of distributed over the circumference arranged gas passage openings.

To avoid the propellant gases inside the gun barrel on the outside of the entire practice floor 1 can flow past, is a sealing system 8th in the area of the massive headboard 3 of the practice floor 1 arranged.

For this purpose, the head part 3 on its outside 9 designed as a sealing surface circumferential area 10 on the rear side through the front end face of the tail body 5 is limited, and whose outer diameter is selected such that the head part 3 at the launch of the practice bullet 1 in this area even the sealing system 8th forms.

In this case, to increase the sealing effect against passing propellant gases in the sealing surface 10 of the head part 3 five annular grooves 11 introduced, which upon firing to a turbulence of the propellant charge gases in this area 10 lead and form a groove seal.

Of course, the invention is not limited to the embodiment described above. For example, the massive headboard does not necessarily have to be a solid body. Rather, it can also be a hollow body, if the wall thickness and / or the material (steel, etc.) of the head part are chosen such that the propellant charge gases cause no or no significant deformation of the head part when shooting in the barrel.

LIST OF REFERENCE NUMBERS

1

Full-caliber practice floor, training floor

2

casing cover

3

headboard

4

Tracer body shot

5

tail body

6

Outside (tail body)

7

Side wall

8th

sealing system

9

Outside (headboard)

10

Area, sealing area

11

groove

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10201003433 A1 [0002, 0003]

Claims (5)

Can be fired from a gun barrel stabilized full-caliber training projectile ( 1 ) with a solid headboard ( 3 ) and one at the rear of the headboard ( 3 ) subsequent tubular tail body ( 5 ), whereby the practice floor ( 1 ) peripherally with a sealing system ( 8th ), having the features: a) the tubular tail body ( 5 ) is designed so that the at the launch of the practice projectile ( 1 ) formed propellant gases on the outside ( 6 ) of the side wall ( 7 ) of the tubular tail body ( 5 ), and b) the head part ( 3 ) has on its outside ( 9 ) designed as a sealing surface circumferential area ( 10 ), whose outer diameter is selected such that the head part ( 3 ) at the launch of the practice round ( 1 ) in this area ( 10 ) itself forms the sealing system. Exercise projectile according to claim 1, characterized in that the deviation between the caliber of the weapon barrel from which the practice round ( 1 ) is verschießbar, and the outer diameter of the head part ( 3 ) in the area of the sealing surface ( 10 ) is less than 0.2%. Practice floor according to claim 1 or 2, characterized in that in the sealing surface ( 10 ) of the head part ( 3 ) at least one annularly arranged groove ( 11 ) is provided. Exercise projectile according to claim 3, characterized in that in the sealing surface ( 10 ) of the head part ( 3 ) at least three axially spaced from each other, annularly arranged grooves ( 11 ) are provided. Exercise projectile according to one of claims 1 to 4, characterized in that the sealing surface ( 10 ) in the rear region of the head part ( 3 ) is arranged.

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