RU2355999C1 - Aircraft ammunition - Google Patents

Abstract

FIELD: weaponry.

SUBSTANCE: proposed ammunition relates to container bomb units incorporating various types of hitting elements. The propose ammunition comprises warhead, fuse block and over-caliber horizontal X-like fin-stabiliser made up of stamped out sectors representing a part of cartridge with two half-fins arranged along the edges including flat outer edges and outer lip forges. Note here that aforesaid sectors are tightly jointed along the flat edges of half-fins, while half-fins mating planes pass through the proposed ammunition lengthwise axis.

EFFECT: higher efficiency due to increased specific efficiency and accuracy of bombing.

3 cl, 5 dwg

Description

The invention relates to the field of military equipment, namely to aircraft ammunition, mainly to aircraft bombs and one-time bomb cartridges.

As is known from the patent and technical literature, the effectiveness of the destruction of area targets by aviation means largely depends on the specific effectiveness of the aviation munition (the ratio of the net mass to the total mass of the munition) and on the accuracy of the bombing.

Given the dimensions and weight of the aviation munition, it is possible to increase the useful mass (mass of explosive charge or mass of cluster warheads) by using:

- materials with increased strength characteristics for the manufacture of metal-consuming parts and housing units (increases the internal volume and weight under the payload while maintaining the center of gravity and using an unbreakable stabilizer);

- a stabilizer with developed stabilizing surfaces that open up in flight, which ensure the stability of the munition during autonomous flight when the center of gravity is shifted towards the tail (the mass decreases and the internal volume of the warhead increases, which allows to increase the payload of the munition);

- a rigid non-expanding stabilizer of an improved design, which, while maintaining the strength characteristics, significantly (several times) reduces its mass (while maintaining the position of the center of gravity, the mass of the warhead decreases significantly, which, together with the mass saving of the stabilizer itself, can significantly increase the ammunition payload).

A known design of a short-range projectile with a flat path (US patent No. 4153223 from 05/08/70), the speed of which depends on the resistance of the incoming air flow. This projectile contains a housing with a head and aft parts, and a stabilizer is installed on the aft part, which has a flow-type device directing the air flow to the projectile stern. The stabilizer is made in the form of through channels of variable cross section, while the thickness of its wall is profiled so that the channel cross section having a minimum area is located between the input and output sections.

The specified technical solution makes it possible to control the flight speed of the projectile depending on the resistance of the incoming flow, which is achieved by significantly complicating the design of the stabilizer and the projectile as a whole.

A known embodiment of the feather stabilizer for the projectile according to the application EPO No. 0174082 from 07.23.84, this stabilizer is made in the form of radially arranged feathers attached to a cylindrical cage and located at the same angles to the cage. Feathers are welded to a ferrule in which they are mounted in grooves and each feather is fused by welding along each side.

The disadvantages of this design of a feather stabilizer should include:

- the complexity of the design (the need for grooves on the outer surface of the cage to accommodate feathers);

- high values of the mass characteristics of the stabilizer (to maintain the strength characteristics it is necessary to increase the thickness of the cage to the depth of the groove).

Known design of aviation ammunition according to the patent of the Russian Federation No. 2232972 from 02/04/03, (prototype).

An air bomb contains a warhead, an explosive device and a caliber stabilizer, with double-sided stampings made perpendicular to the root chord of the feather on the side surface of each feather, and the stamps have a triangular profile with a maximum depth at the mount with the clip.

The disadvantages of this design of air bombs include:

- low accuracy characteristics of the stabilizer, due to the imposition of negative factors when welding embossed feathers, which are installed along the generatrix of the clip, while the lower edge of the pen and the cartridge are touched only at the intersection of the sinusoidal curve with the generatrix, creating a variable gap between the overhanging edges of the pen and the cartridge. For this reason, in the welding process, unpredictable shrinkage of the clip material and the pen occurs, which leads to a change in the geometric parameters of the structure;

- the design of the relief-shaped pen causes disturbance of the aerodynamic flow, which reduces the ballistic characteristics of the ammunition and increases the load on the stabilizer;

- the location of the weld in the most loaded zone - at the base of the pen along the generatrix of the cage significantly reduces the strength of the connection and requires an increase in the thickness of the pen and cage, which ultimately leads to a decrease in the mass of the payload of the ammunition, and in some cases leads to cracks ( foci of destruction) during operation.

The task of the invention is to increase the effectiveness of aircraft munitions.

The technical result consists in increasing the specific efficiency of aircraft ammunition and the accuracy of bombing.

The technical result is achieved by the fact that the aviation munition contains a warhead, an explosive device and an over-calibrator stabilizer with an X-shaped arrangement of feathers made of stamped sectors in the form of a part of a holder with two half feathers along the edges, made with flat outer edges and outer stampings, while the sectors hermetically connected along the flat edges of the semi-feathers, and the mating plane of the semi-feathers pass through the longitudinal axis of the munition.

The manufacture of the stabilizer design from the same, almost interchangeable sectors as a part of the cage with two half feathers at the edges, obtained by high-precision sheet metal stamping (mainly depending on the precision of the tool manufacturing), allows to obtain almost identical stabilizer feathers, which ultimately leads to to a significant improvement in the aerodynamic characteristics of aircraft ammunition, and therefore to an increase in the accuracy of bombing.

The execution of the outer contour of the feathers flat and lying in a plane passing through the longitudinal axis of the munition allows you to:

- to place the weld in the least loaded zone, which significantly increases the strength of the connection, and, ultimately, leads to a decrease in the mass of the stabilizer and increase the specific efficiency of the aviation munition;

- to ensure a snug fit of the sectors to each other, allowing the use of advanced connection methods that reduce the metal structure and the complexity of manufacturing.

The implementation of semi-feathers with external stampings and the location of the docking nodes of the sectors along the flat edges of the semi-feathers makes it possible to obtain a rigid stabilizer structure while reducing its weight, which, ultimately, leads to an increase in the specific efficiency of aviation ammunition.

The tight connection of the sectors ensures the reliability and safety of the stabilizer in the conditions presented to aircraft ammunition.

In aviation ammunition, the stamping angle of each stabilizer half-pen from the mating plane can be 2–5 degrees.

A decrease in this angle of less than 2 degrees leads to a decrease in the moment of resistance and an increase in internal stresses at the place of transition of the half-feathers to the cage, which reduces the structural strength and, consequently, the specific effectiveness of the ammunition. At the same time, the conditions for applying anti-corrosion coatings inside the stabilizer are significantly worsened, which leads to a decrease in the operational characteristics of aircraft ammunition.

An increase in the angle of more than 5 degrees leads to a decrease in the rigidity of the structure, an increase in internal stresses at the places where the stampings go into the flat parts of the feathers, and an increase in aerodynamic loads, which leads to a decrease in the specific effectiveness of the ammunition.

In aviation ammunition, the warhead can be connected to the stabilizer by means of a frame rigidly fastened to the front end of the cage, which significantly increases the stiffness of the stabilizer.

In Fig.1, 2 shows a General view of the aircraft ammunition.

Figure 3 shows the node connection semi-feathers.

Figure 4, 5 shows the sector of the stabilizer.

Aircraft ammunition consists of a warhead 1, an explosive device 2 and a feather stabilizer 3, consisting of sectors 4, which include part of the cage 5 and half feather 6.

The work of aviation ammunition is as follows.

At the moment of separation of the ammunition from the carrier, an electric impulse is supplied to the fuse device 2 to activate its operation sequence diagram. Next, the ammunition continues its autonomous flight, the stability of which is provided by the stabilizer 3.

After a specified period of time or at the moment of the meeting of the ammunition with an obstacle, an explosive device 2 is triggered, which initiates the equipment of the warhead 1.

The performance of the proposed technical solutions in the design of aircraft munitions can increase its specific efficiency and accuracy of bombing, and therefore the effectiveness of the action.

Claims (3)

1. Aircraft ammunition containing a warhead, an explosive device and a calibrator stabilizer with an X-shaped arrangement of feathers, characterized in that the stabilizer is made of stamped sectors in the form of a part of a cage with two half feathers at the edges, made with flat outer edges and outer stampings, with this sector hermetically connected along the flat outer edges of the feathers, and the mating plane of the feathers pass through the longitudinal axis of the munition. 2. The ammunition according to claim 1, characterized in that the outer stamping of each half-pen is made at an angle to the pairing plane of the half-feathers, comprising 2-5 °. 3. Ammunition according to claim 1 or 2, characterized in that the warhead is connected to the stabilizer by means of a frame rigidly fastened to the front end of the cage.

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