Military Technology

【Revision】

Later, after improvement, a special paint was sprayed on the cartridge case. This paint has the function of lubricating and sealing the gun bore.

Therefore, most of the bullets in our country are actually painted iron-cased bullets, and only a few precision sniper rifles use expensive copper-cased bullets. Because the stability of this kind of painted iron-cased bullets is not as good as copper-cased bullets when fired, these sniper rifles use copper-cased bullets for accuracy.

As for the history of the warhead, it is actually similar, because the steel warhead wears the rifling too seriously, and it has reached a state that is completely unacceptable. The barrel was the most difficult and expensive part to process in a gun, so in the end we had to give up on steel bullets and aim at full lead bullets.

To put it simply, the warheads are not wrapped in copper shells, and are all warheads pressed by lead. This kind of all-lead bullet solves the problem of too high hardness of steel bullets. The barrel rifling does not have much wear, and this kind of all-lead bullet has strong ductility, so it has strong air tightness, and the bullet's The kinetic energy is also better.

Therefore, for quite some time, many bullets with lead bullets appeared. [Digression: When the author was a child, probably around 90 years old, there were some bullets left over from the militia days of his elders at home. There were all kinds of bullets, including many of these lead-tipped bullets. Later, there was a gun ban campaign for a period of time, and when the call was made to hand it in, all of it was handed in. 】

However, this all-lead bullet also has its shortcomings. First, the metal texture of lead is too soft, so its penetrating power is not strong and its lethality is limited.

Therefore, technicians added a steel core to the center of the lead bullet. The tip of the bullet was also made of steel, and only the outer parts that contacted the rifling were lead. In this way, the problem of poor penetration of lead bullets is solved.

Although this problem has been solved, another problem has been exposed. It is still because the lead bullet is too soft and slides in the rifling of the barrel, causing lead to hang in the capacity. To put it simply, when the bullet exits the barrel quickly, it will be damaged due to too much force and too fast speed, causing part of the lead on the bullet to remain on the rifling.

In this way, the damaged warhead will be affected by its aerodynamic shape during flight, so the flight trajectory of the warhead will be affected, thus greatly affecting the accuracy of automatic shooting.

On the other hand, what is more serious is that the lead left in the barrel will hinder the firing of the bullet below, thereby creating the risk of the chamber exploding.

So the technicians wrapped the copper shell around the lead bullet to form a kind of protection. Because copper is harder than lead, and copper itself is a metal lubricant, it slides out of the chamber more smoothly.

So there are copper-coated lead core bullets and copper-coated steel core armor-piercing bullets.

In fact, this is also the development of bullets, or the development process of current bullets. The earliest musket bullets were lead bullets, which later developed step by step into the prototype of today's bullets.

The bullet has been around for almost a century and a half now. Although it has changed in some aspects, the basic principle of the bullet has not changed. It still consists of four parts: the warhead, the cartridge case, and the propellant primer.

Many technical experts in the military industry have always hoped to make breakthroughs in the field of bullet technology, but they all ended in failure.

Unexpectedly, Wu Hao and the others actually came up with a brand new bullet. Although this kind of bullet is just a warhead used on an electromagnetic gun, it is also a breakthrough and an innovation.

As professional soldiers, both Luo Kai and Pang Zhengqing knew how difficult this was, so they were so surprised.

After explaining this, Wu Hao answered Pang Zhengqing's question.

"The electromagnetic gun does not use chemical energy as propellant to launch warheads, so it does not require ammunition or cartridge cases, only one warhead. The bullet is actually in a state of continuous acceleration throughout the entire barrel, not because of The combustion of ammunition accelerates instantaneously, so it has very low requirements for air tightness.

Not only is air tightness not required, but the gap must be enlarged, which is conducive to the huge heat dissipated during sustained high-speed design, so our barrel is actually hollowed out.

Rather than saying it is a gun barrel, it is actually a launch rail. It is composed of several circular steel rails with graphite sliders on them, which will greatly reduce the friction generated by the bullet during sliding acceleration.

On the one hand, it can reduce the heat generated by sliding friction, on the other hand, it can improve the stability of the warhead during launch and improve its design accuracy.

In fact, its principle is very simple. It is a bit like the principle of our tank's smoothbore gun. This warhead is also a bit like the stable shelling tungsten core armor-piercing bullet used by tank guns. "

At this introduction, Wu Hao picked up the extended precision marksman rifle, and then removed the magazine. There was a warhead similar to the hidden water droplet streamlined warhead in front of him, but there was another one at the end of the warhead that looked like a bullet. It's a plastic rear wing. As Wu Hao said, it is very similar to the tank's shelling stabilized tungsten core armor-piercing projectile.

"Are these two types of bullets the same?" Luo Kai couldn't help but ask.

Wu Hao smiled and nodded: "Actually, they are the same, except that one has this kind of tail fin and the other does not have a tail fin. In fact, there is not much difference in their short-range design. The bigger one is in the middle and long range.

We are still in the experimental stage of these two types of bullets, but in the future, the finished products should be replaced with bullets with plastic tail fins. Although a plastic tail is added, its cost has not increased much, and the overall weight is not much heavier, only a few grams or more, which is basically negligible. "

At this introduction, Wu Hao pushed out a bullet from the magazine and showed it to the two of them, saying: "Compared with traditional warheads, this kind of warhead is more aerodynamically designed, so it flies better in the air. The posture is more stable and the trajectory is straighter.

And it is less affected by air humidity and wind speed than traditional bullets. "

Luo Kai and Pang Zhengqing finally saw the full picture of this kind of bullet at close range. As Wu Hao said, it has an underwater shape. It is almost the same as a traditional rifle bullet, but the details are still very different. .

For example, the overall appearance is bright metallic silver, and the tail of the warhead is shrunk and elongated, with a plastic tail fin on it. If it had not been removed from the firearm magazine and moved elsewhere, neither Luo Kai nor Pang Zhengqing would have thought it was a child's toy, and would never have imagined that it could be a bullet capable of killing people.