JPH03233300A - Air frame with sabot - Google Patents

Abstract

PURPOSE:To avoid perturbing a projectile or damaging the penetrating force of the projectile, by making a sabot comprise an explosive charged in a cavity defined in cooperation with a projectile core, and a firing device for the explosive. CONSTITUTION:A sabot 2 comprises an explosive 5 charged in a cavity 5 defined in cooperation with a projectile core 1, and a firing device 3 for the explosive 5. The sabot 2 is launched together with the projectile core 1, and the firing device 3 is operated at an appropriate time to fire the explosive 5. Upon the ignition, the sabot 2 is separated from the projectile core 1 by a strong gas pressure generated by combustion or explosion of the explosive 5, independently of air resistance. Therefore, there is no possibility that air flows in the vicinity of a projectile may be markedly disturbed to put the projectile into perturbation. In addition, the kinetic energy of the projectile core 1 is increased at the time of the separation, resulting in an increase in the penetrating force of the projectile core 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a bullet having a sabot that can be separated from the bullet core;
It relates to bullets or flying objects (representatively referred to as "bullets" in the following explanation) such as bombs, artillery shells, and rockets.

[Prior Art] Conventionally, when firing a bullet core made of a dense material such as tungsten or uranium, a relatively light material was used to accelerate the bullet core inside the gun barrel or gun. An auxiliary member called a constructed sabot was used, and air resistance acting on the sabot was actively used to separate the sabot from the bullet core after it was fired from the muzzle or muzzle. .

That is, the sabot was manufactured in a shape that could easily absorb air resistance.

[Problem to be solved by the invention] Therefore, since such a sabot is installed,
After firing, the airflow around the bullet is significantly disturbed, perturbing the bullet and causing it to deviate from its trajectory, which not only reduces the probability of hitting the target, but also causes a loss of kinetic energy by at least the mass of the sabot. As a result, the penetration power of the bullet was that much weaker.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a bullet or projectile having sabots that does not perturb the bullet or impair its penetration power.

[Means for Solving the Problems] In order to achieve this object, the present invention provides a flying object that includes a bullet core and a sabot that fits into the bullet core, wherein the sabot cooperates with the bullet core. The gun is characterized by having gunpowder loaded into a cavity defined by the gunpowder, and an ignition device for igniting the gunpowder.

"Operation" The sabot is fired together with the bullet core. When the ignition device is activated at the appropriate time and the gunpowder is ignited, the sabot fires the strong gas produced by the combustion or explosion of the gunpowder, without relying on air resistance like in the past. It separates from the bullet core under pressure.

During separation, the kinetic energy of the bullet core increases, and this increase results in an increase in penetration force. Also, this increase is maximized when the amount and/or type of gunpowder is selected and the sabot is separated from the bullet core so that the translational velocity is zero.

[Example] Next, an example of a bullet having a sabot according to the present invention will be described in detail with reference to the accompanying drawings.

In Japan, numeral 1 is a bullet core which may be of a normal shape, and a sabot 2 according to the present invention is removably fitted around the cylindrical main body portion 1a of this bullet core 1.

This sabot 2 has a front part 2a having a first cavity 1a' for receiving the main body part 1a of the bullet core 1, and a second cavity for receiving an appropriate ignition device 3 and an appropriate explosive 5, respectively. 3a
, a rear part 2b having a third cavity 5a, and a second cavity 3a.
The third cavity 5a communicates with each other via a small diameter circular passage 2C, and the ignition device 3 extends into the circular passage 2C and communicates with the explosive 5. Further, the end of the second cavity 3a of the sabot 2 has a female thread as shown in the figure, and a lid 4 is screwed thereto to fix the ignition device 3 inside the sabot 2.

In the embodiment, flange-like protrusions Za' and Zb' are integrally provided on the front part 2a and rear part 2b of the sabot 2, but the external shape of the sabot 2 depends on the barrel or gun barrel of the gun or cannon to be used. It may be determined appropriately according to the above-mentioned protrusion 2.
a' and 2b' are not necessarily required, and in that case, the sabot 2 can be formed into a simple cylindrical shape as a whole, as shown by the chain line.

The ignition device 3 may be any suitable delayed ignition device that is activated mechanically or chemically after the bullet has been fired, or may be remotely controlled by a small built-in battery and a control device (not shown) or by a built-in timer (not shown). It may be a well-known electromagnetic ignition device that operates at an appropriate time under the command of

When the bullet having the above configuration is fired, the ignition device 3 is activated at an appropriate time, ignites the gunpowder 5, and the gunpowder 5 burns or explodes. At this time, the bullet core 1 receives high gas pressure at the core bottom 1b due to the combustion of the gunpowder 5, and the sabot 2 separates from the bullet core 1 due to the reaction. Sabo 2 during separation
The relative speed between the gunpowder 5 and the bullet core 1 can be set in advance by appropriately selecting the amount and type of gunpowder 5.

When the sabot is separated, the motion of each part is governed by the law of conservation of momentum, so the masses of the bullet core 1 and the sabot 2 are respectively M,
m, their translational speeds are U, and the translational speeds of bullet core 1 and sabot 2 after separation are V and v, respectively, then in a laboratory system, (M+m)U=mv+MV. As mentioned above, if the sabot 2 is separated so that the translational speed becomes zero in a laboratory system by selecting the amount and type of gunpowder 5, then from the above equation, the translational speed ■ of the bullet core 1 becomes V-(1+-) v. That is, when the sabot is separated, the bullet core 1 is accelerated by the mass ratio of the constituent parts (7°゛6, ignoring the gunpowder 0 mass ζ at this time) M. Therefore, the ratio of the kinetic energy before and after the separation of the sabot 2 is as follows, the kinetic energy of the bullet core 1 is amplified, and this is used to increase the penetration force.

[Effects of the Invention] As described above, according to the present invention, the sabot is separated from the bullet core by the action of the explosive built in the sabot, so there is no need to make the sabot in a shape that easily absorbs air resistance, and the bullet In addition to reducing the perturbation of the bullet, the separation of the sabots can increase the kinetic energy of the bullet core, providing a bullet with greater penetration power.

Furthermore, since it is no longer necessary for the sabot to have a shape that easily absorbs air resistance, the sabot can be made into a simple cylindrical shape, and its manufacture becomes extremely easy.

[Brief explanation of drawings]

The figure is a sectional view showing one embodiment of a bullet according to the present invention. 1... Bullet core 2... Sabo 3... Ignition device 5 - Gunpowder 5a... Cavity (third cavity) - Earth -

Claims (1)

[Claims] In a flying object that includes a bullet core (1) and a sabot (2) that fits into the bullet core (1), the sabot (2) is configured to fit the bullet core (1).
1), and an ignition device (5) for igniting the gunpowder (5).
3) A flying object having sabots.