CN1447091A - Low characteristic shooting system and method for bullet - Google Patents

Abstract

The invention discloses a low-characteristic launch system and method for projectiles. The front and rear panels are coupled to an expansion container having a shaft. As the volume of the expansion container increases, the piston moves along the axis in the opposite direction. The projectile is positioned in such a way that movement through the front plate will ensure that it is launched in the intended direction. The movement of the plate along the axial direction is limited. The two panels are interconnected by an extensible link.

Description

Projectile low signature launch system and method

technical background

Reducing the characteristics associated with firing projectiles is very important in many tactical scenarios, especially in urban combat. When a projectile is fired from a tube with a rocket motor, the exhaust gases create a high pressure region and distinct audible and visual signatures can be observed. This precludes covert fire from cover and makes the shooter easy to detect.

In order to reduce the adverse effects mentioned above, a closed launch system has been designed. This system confines the gaseous products of propellant combustion between two pistons moving in opposite directions in the launch tube. Schnabel et al. disclose a launch system for firing projectiles in US Patent Applications US 3,771,417 and US 3,779,130, which is the well-known double "capture piston" design. One of the pistons propels and accelerates the projectile in the firing direction, the other piston propels a counter-moving bolus in the rearward direction until it is ejected. The two pistons move until they reach mechanical stops at the front and rear of the launch tube. Such a system, even with very well matched weights on both sides of the propellant, can have a mismatch in the timing at which the two pistons hit the stop, causing recoil that affects accuracy and shooter safety.

In addition, since the impact force at the end is transferred to the launch tube by the piston, the launch tube must be structurally designed to withstand the impact tension, which necessitates an increase in the weight of the launch tube.

Furthermore, it is necessary to incorporate a deformable braking device in the design, such as disclosed by Schnabel et al. in US Patent Application US 4,148,244, which increases the complexity of the design and the weight of the launch system.

The present invention provides a solution for high pressure gas products containing propellant combustion without axial loading of the launch tube and without recoil.

Contents of the invention

According to the invention, the projectile is launched from the launch tube after being propelled by a plate which acts as a piston. Yet another plate, which may act as a piston, pushes a counter-moving mass in a rearward direction until the mass is ejected. The reverse mobile cluster consists of a relatively high concentration of flowable media. The two plates are connected to each other, and the structure connecting the two side plates prevents the two plates from moving when the distance between the two plates reaches a predefined value. In one embodiment, the interconnect structure is a closed bellows tube containing the gas between the two side plates, and the launch tube is not subjected to high pressure at all. In another embodiment, the interconnection is a plurality of ropes and the gas is contained between the launch tube acting as a pressure vessel and the side plate acting as a piston.

Brief description of the drawings

Fig. 1a is a schematic diagram of a launching system before launching a projectile according to a first embodiment of the present invention.

Fig. 1b is a schematic diagram of the launching system after launching the projectile according to the first embodiment of the present invention.

Fig. 2a is a schematic diagram of a launching system before launching a projectile according to a second embodiment of the present invention.

Fig. 2b is a schematic diagram of the launching system after launching the projectile according to the second embodiment of the present invention.

preferred embodiment

Fig. 1 shows a first embodiment of the present invention. The launch system comprises a disposable launch tube 1 with removable caps 2, 3 at both ends. An optical sight 4 and a firing mechanism 5 are attached to the launch tube 1 . The output of the firing mechanism (electronic or pyrotechnic) is transmitted to the propellant ignition system 7 via an electronic conductor or pyrotechnic cable (eg, detonating pyrotechnic cord) 6 . The propellant 8 is enclosed between two side plates 9 and 10 acting as pistons.

The projectiles 11 are placed in front of the front side panels 9 , while the counter-moving regiments are located behind the side panels 10 . The reverse mobile bolus can be a flowable medium with a relatively high concentration. The side panels 9 and 10 are connected to each other by an open connection structure 13 . The connection structure 13 consists of several ropes or cables made of a high tensile material such as strong steel or strong fibers such as Kevlar or a combination of both. If non-metallic, the rope or cable can be coated with an insulating material such as rubber. When the shooter activates the firing mechanism 5 , a signal is sent to the propellant ignition system 7 . The propellant 8 is ignited and burns, producing high temperature, high pressure gas. The pressure generated in the launch tube 1 and between the side plates acting as pistons 9, 10 impinges on the pistons. The projectile 11 is pushed forward by the side plate 9 and then ejected from the launch tube 1 . The reverse moving cluster 12 is pushed backward by the side plate 10 and spreads out after leaving the launch tube 1 .

The structure 13 connecting the two side plates prevents further movement of the two plates when the distance between the two plates reaches a predefined value determined by the tension of the ropes. The lengths of the ropes or cables may be the same, or slightly different, or different in thickness, so that the stop of the piston can be extended to a certain time interval without stopping abruptly.

To aid in the dispersion of the reverse moving mass and to gradually release the pressure between the side plates after the projectile is fired, there may be several openings 14, such as holes or bursts, in the piston.

Figure 2 shows a second embodiment of the invention. Elements identical to those of the embodiment shown in FIG. 1 are not shown and labeled in FIG. 2 . Refer to Figure 1 for the same parts. The launch system comprises a disposable launch tube 1 with removable caps 2, 3 at both ends. An optical sight 4 and a firing mechanism 5 are attached to the launch tube 1 . The output of the firing mechanism (electronic or pyrotechnic) is transmitted to the propellant ignition system 7 via an electronic conductor or pyrotechnic cable (eg, detonating pyrotechnic cord) 6 .

The propellant 8 is enclosed between two side plates 9 and 10 connected by telescoping tubes 23 . The two side plates 9 and 10 with the telescoping tube 23 connecting them form a closed structure serving as a pressure vessel. The bellows are made of high tensile material such as strong steel or fabric reinforced with strong fibers like Kevlar or a combination of both. If it is non-metallic, the telescopic tube can be coated with a layer of insulating material, such as rubber. It should be noted that, according to this second embodiment, the launch tube 1 is not sealed, which allows the launch tube to be designed with a reduced weight. In this case, the side plates 9 and 10 are not used as pistons and are not required to be sealed between them and the launch tube.

The projectile 11 is in front of the front side panel 9 , while the counter-moving regiment is behind the side panel 10 . The reverse mobile bolus can be a flowable medium with a relatively high concentration. When the shooter activates the firing mechanism 5 , a signal is sent to the propellant ignition system 7 . The propellant 8 is ignited and burns, producing high temperature, high pressure gas. The pressure generated in the bellows 23 and between the side plates 9, 10 impinges on the side plates. The projectile 11 is pushed forward by the side plate 9 and then ejected from the launch tube 1 . The reverse moving cluster 12 is pushed backward by the side plate 10 and spreads out after leaving the launch tube 1 .

The telescoping tube 23 connecting the two side plates prevents the two plates from moving further when the distance between the two plates reaches a predefined value determined by the extension length of the telescoping tube. In addition to the telescopic tube connection, some strong ropes can also be used to connect the two side plates, so that the stop of the side plates can be extended to a certain time interval without suddenly stopping.

In order to aid in the dispersion of the reverse moving mass and to gradually release the pressure between the side panels after the projectile has been fired, there may be several openings 14 in the side panels, such as holes or bursts.

Claims (1)

1, a kind of low feature emission system and method for projectile, one or many aspects are described as specification in fact.

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