JPH0328699A - Aircraft carrying training bullet of low air resistance type - Google Patents

Abstract

PURPOSE:To execute bombing training of low air resistance type bomb on the water by providing a gas bag to be expanded and developed at the time of supply of gas, a gas supply unit communicating with the bag and a percussion fuse of the supply unit. CONSTITUTION:A combustion chamber assembly 1 having a combustion chamber therein is so molded as to become a complete bullet shape as a pair with a rear bullet shell unit 8, and a cartridge 2 for generating combustion gas and a percussion fuse 3 for burning the cartridge 2 at the time of landing on the water are associated at the front end. When the fuse 3 is operated due to an impact upon landing on the water to burn the cartridge 2, combustion gas is guided through a tube 7 into a gas bag 6 to rapidly develop the bag 6 with the gas, thereby preventing a trailing bullet from sinking in the water. Therefore, its hitting position and its pattern can be visually observed. A bombing training of low air resistance type bomb can be performed on the water by employing the training bullet.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a training bullet used in bombing training for low air resistance bombs mounted on aircraft.

[Conventional technology]

Previously, bombing training was conducted at land-based firing ranges using GLL practice rounds as shown in Figure 6. This training bullet has a fin assembly 12 welded to an elongated tear cylinder-shaped bullet body 22, and has a built-in zero emitting tube 3 and a smoke generator 23.
After being dropped from an aircraft, the bomb collides with the ground to activate the percussion tube 3 and smoke generator 23 to confirm impact.

[Problem to be solved by the invention]

Traditionally, bombing training for low air resistance bombs was conducted on land. This is because the training ammunition was designed for use on land.

In general, the airspace above land-based bombing and firing facilities in Japan is extremely limited and narrow in order to eliminate danger to surrounding civilian homes and facilities. This limits the maneuverability of the carrier aircraft, making it difficult to carry out sufficient bombing training.

For this reason, we decided to conduct training at a firing range on the water (sea), and if we used conventional training bullets on the water (sea) for the first time, they would be submerged as soon as they hit the water. Visual confirmation of position and pattern is accurate (unable to implement).

The present invention solves the above-mentioned problems of the conventional Ku-11 drill bomb, and enables bombing practice with low air resistance bombs on water (ocean), where restrictions are more relaxed than at land-based firing ranges. The aim is to provide training ammunition that will enable the implementation of

[Means to solve the problem]

The present invention has solved the above-mentioned problems, and includes: a gas bag that is housed in a bullet and expands and expands when gas is supplied to the inside; a gas supply device that communicates with the inside of the gas bag;
The present invention relates to an aircraft-mounted low air resistance training bullet characterized by being equipped with a percussion tube connected to the starting mechanism of the gas supply device.

[Effect]

The training ammunition of the present invention is used at surface (sea) firing ranges.

The gas bag is housed inside an aerodynamically shaped projectile so as not to adversely affect the aircraft's performance, characteristics, and fall trajectory during transport by aircraft and during free fall after dropping. When the Hon-111 grenade falls to the water surface and the impact force from the collision with the water surface activates the percussion tube, the gas supply device inside the projectile subsequently activates. This gas is guided inside the gas bag, causing the gas bag to inflate and open. The training projectile is undone by the buoyancy of the gas inside the gas bag and floats on the surface of the water with the gas bag facing up. It becomes possible to confirm the impact position and pattern using this gas bag as a landmark. In addition, since the impact upon impact is softened by water, it is possible to reduce the degree of damage to Ho-11 drill bullets, and it is possible to collect them, replenish them with necessary parts such as consumables, and use them again. Become.

〔Example〕

Fig. 1 is a sectional view of the first embodiment of the present invention, Fig. 2 is an enlarged sectional view of section A in Fig. 1, Fig. 3 is a sectional view of the cap in the above embodiment in a free state, and Fig. 4. 2 shows a perspective view of the band used in the above embodiment. In this embodiment, a gunpowder cartridge is used as the gas generating device. As shown in FIG. 1, a male; 1 drill bullet consists of four components: a combustion chamber assembly 1, a rear shell assembly 8, a fin assembly 12, and a gas pug 6.

Combustion chamber assembly 1, which has a combustion chamber inside, is rear shell assembly XL8.
The oak is molded in a pair to form a perfect bullet shape,
A cartridge 2 that generates combustion gas and a percussion tube 3 that burns the cartridge 2 when landing on water are installed in its front end. The rear part of the combustion chamber is open to facilitate machining, and a complete combustion chamber is formed by assembling the b1 combustion chamber rear wall 4. The opening at the rear of the combustion chamber and the rear wall 4 of the combustion chamber are sealed by an O-ring 5, as shown in FIG.

In the center of the rear wall 4 of the combustion chamber, there is a
A gas hole is opened for assembling a tube 7 leading to the bag 6.

The rear shell assembly 8 is a hollow cylinder, and is paired with the combustion chamber assembly 1 to form a complete shell shape. The front part of the rear shell assembly 8 is connected to the combustion chamber assembly 1 by a fastener 9 (FIG. 2), and the rear part is connected to the combustion chamber assembly 1 by a fastener similar to the tube retainer 10.

The tube holder 10 is used to prevent the tube 7 for guiding combustion gas from the combustion chamber to the gas nokgu 6 from being damaged by vibrations during flight and impact upon landing on water.
The contact surface is made of rubber or synthetic resin cushioning material.
protected by

The fin assembly 12 consists of a cylindrical hollow tube and surrounding fins. During flight, the cylindrical hollow tube
A gas bag 6 is stored inside. A fin for flight stability is attached to the rear of the fin assembly l2. The fin assembly 12 is attached to the tube retainer 10 at its front end with a fastener. Moreover, the opening of the tube 7 is
Located within the fin assembly. The rear end of the fin assembly 12 is open for deployment of the gas bag 6, but is covered by a cap 13 to prevent the gas bag from accidentally flying out during transport to the mother machine. cap 1
3 is shaped so as to slightly expand in a free state, as shown in FIG. 3, and is fixed by a band 14 shown in FIG. 4 during flight transportation. Band 14 is safety line 15
When the training bullet is dropped, the ring 16 of the safety line 15 is restrained to the base aircraft, and the safety line 15 is released by pulling it out. The safety line 15 is also used to ensure the safety of the percussion tube 3 during flight transportation, and the percussion tube 3 returns to the arming state when the safety line 15 is pulled out. When the band 14 is released and the cap 13 is no longer restrained, the cap 13 expands a little due to its own elasticity.

Wind pressure during the fall acts here, and the cap 13 is separated from the noin assembly 12 before landing on the water.

The percussion tube 3 is actuated by the shock caused by the water landing, and when the cartridge 2 is combusted, the combustion gas is guided through the tube 7 to the gas bag 6. The gas bag 6 deploys quickly due to this combustion gas, and the training bullet is prevented from being submerged in water. The gas bag 6 is colored with fluorescent orange or the like to improve visibility. θI1#! If the cost of retrieving bullets is too great to justify the cost;
It is also possible to provide a small gas vent hole 17 so that gas can gradually escape from the bag 6, and to submerge the training bullet in water after a certain period of time.

FIG. 5 shows a sectional view of a second embodiment of the invention.

This embodiment uses a gas bottle as a gas source, and the configuration and functions other than those described below are the same as those of the first embodiment.

Honta 11 practice bullet is a substitute for cartridge 2 in the first embodiment.
The gas bottle 21 is built in and the button is pressed.
A cap opening device 20 using an explosive bolt or the like is assembled behind the trigger tube 3, and is connected to the percussion tube 3 by a fuse tube 19. A screw 1 is provided at the center outer circumference of the gas bottle so that it can be assembled into the front shell assembly 18. The outer shell of rear shell assembly 8 is fin assembly 1.
It is joined to the outer shell of 2. There is no problem even if these are integrally molded.

When the percussion tube 3 is actuated by the impact of water landing, the δ signal is transmitted through the fuse tube 19 and reaches the cap opening device 20. When the cap opening device 20 is activated and the gas bottle 21 is opened, the gas inside the gas bottle 21 expands the gas bag 6.

Next, a third embodiment of the present invention will be described using FIG. 1. This embodiment uses a smoke generating device as a gas generating device, and differs from the first embodiment in the following points. In this embodiment, a smoke generator is incorporated into the combustion chamber assembly 1 instead of the cartridge 2 of the first embodiment. The operating principle is the same as that of the first embodiment, but by permanently providing the gas vent hole 17 of the gas bag 6, the following functions are provided. When the inside of the gas bag 6 is filled with gas and the gas bag 6 is fully deployed, smoke leaks to the outside of the training bullet through the gas vent hole 17. This smoke helps in visual recognition of the impact position and pattern of the θ11 drill bullet. However, when this training bullet is used, if it is not recovered promptly after the training is over, the training bullet will eventually become submerged in water.

As described in detail in the three examples above, by incorporating a gas generator and a gas bag into the training bullet and deploying the gas bag immediately after impact, it is possible to fly over water (on the sea) with low air pressure. It becomes possible to carry out bombing training with resistance-type bombs. By collecting it after completing the 11th cycle and replenishing it with the parts that require Hr, it has the effect of making it possible to reuse it.

〔Effect of the invention〕

The aircraft-mounted air-resistance type Ill bullet of the present invention includes a gas bag that is housed inside the bullet and inflates and deploys when gas is supplied to the inside, a gas supply device that communicates with the inside of the gas bag, and a Since it is equipped with a percussion tube connected to the starting mechanism of the gas supply device, it is possible to prevent submergence when used on water, and it is also possible to visually confirm the impact position and pattern. Therefore, by using this training bullet, it becomes possible to conduct bombing training using low air resistance bombs on the surface (at sea).

[Brief explanation of drawings]

Fig. 1 is a sectional view of the first embodiment of the present invention, Fig. 2 is an enlarged view of section A in Fig. 1, Fig. 3 is a sectional view of the cap in the free state of the above embodiment, and Fig. 4 is the above FIG. 5 is a sectional view of the second embodiment of the present invention, and FIG. 6 is a side view of a conventional training bullet for aircraft. 1... Combustion chamber assembly, 2... Cartridge, 3...
Shot tube, 4... combustion chamber rear wall, 5... 0-I
Jung, 6...Gas bag, 7...Tube, 8
...Rear shell assembly, 9...7 Asuna, 10...Tube holder, 1L...Buffer material, 12...Fin assembly, 13...Cap, 14...Band, 15.・・・
Safety line, 16...Ring, 17...Gas vent hole, 1
8...Forward shell assembly 19...Fuse tube, 20...Opening device, 2l...Gas bottle, 22...Bullet body, 2
3...Smoke generating device.

Claims (1)

[Claims] Equipped with a gas bag that is housed within the bullet and expands and deploys when gas is supplied inside, a gas supply device that communicates with the inside of the gas bag, and a percussion tube that is connected to the starting mechanism of the gas supply device. A low air resistance training bullet for aircraft.