Vol 6 Chapter 2761: The Science of Bullets【B】

【Revision】

Later, after improvement, a special paint was sprayed on the shell casing, which has the effect of lubricating and sealing the barrel.

Therefore, most of the bullets in our country are actually painted iron shell bullets. Only a few precision sniper rifles use expensive copper shell bullets. Because this kind of painted iron shell bullet is not as stable as copper shell bullets when fired, these sniper rifles use copper shell bullets for accuracy.

As for the history of the warhead, it is actually similar, because the steel warhead wears too much on the rifling, and it has reached a state that is completely unacceptable. In a gun, it is the barrel that is the most difficult to process and the most expensive, so in the end I had to give up the steel bullet, and then aimed at the full lead bullet.

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

So for quite a while, there have been many bullets with such lead warheads. [Off-topic: When the author was a child, about 90 years ago, there were some bullets left by the elders in the militia at home. There are all kinds of bullets, and there are many lead-head bullets among them. Later, there was a period of time when the gun ban campaign was held, and when the call was made to hand in all of them, they all handed in. 】

But this all-lead warhead also has its disadvantages. First of all, the metal lead is too soft, so its penetrating power is not strong and its lethality is limited.

Therefore, the technicians added a steel core to the center of the lead warhead. The tip of the warhead is also steel, and only the outer parts that touch the rifling are 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, which will cause lead to hang in the capacity. To put it simply, when the bullet is released from the chamber quickly, it will be damaged due to too much force and too fast speed, causing a part of the lead on the bullet to stay on the rifling.

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

On the other hand, what is more serious is that the lead left in the barrel will hinder the shooting of the bullets below, and there is a risk of explosion.

So the technicians wrapped the copper shell around the lead warhead to form a kind of protection. Because the texture of copper is harder than that of lead, and copper itself is a metal lubricant, the slide out of the chamber is smoother.

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

In fact, this is also the bullet, or the development process of the current bullet. The earliest musket bullet is the lead bullet, and later developed step by step into the embryonic form of the current bullet.

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

There have always been many technical experts in the military industry hoping 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 applied to electromagnetic guns, it is also a breakthrough and an innovation.

As professional soldiers, both Luo Kai and Pang Zhengqing understood how difficult it 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 a propellant to launch the warhead, so it does not need ammunition, nor does it need a cartridge case, only one warhead is needed. The bullet is actually in a state of continuous acceleration throughout the barrel, not because Ammunition burns in a state of instantaneous acceleration, so it has very low requirements for airtightness.

Not only does it not require airtightness, but it also needs to increase the gap, which is conducive to the huge heat emitted during the continuous high-speed design, so our barrel is actually a hollow state.

Rather than saying it is a barrel, it is actually a launch rail. It is composed of several circular steel rails with graphite sliders on it, which will greatly reduce the friction generated by the bullet in the state of 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 when it is launched, and improve its design accuracy.

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

At this point in the introduction, Wu Hao picked up the extended precision marksman rifle, and then removed the magazine, and there was a bullet similar to the streamlined bullet in the dark, except that there was another bullet at the end of the bullet. It's a plastic fin. As Wu Hao said, it is very similar to the shell-stabilized tungsten core armor-piercing projectile of the tank. UU reading www. uukanshu． com

"Are these two bullets the same?" Luo Kai couldn't help asking.

Wu Hao nodded with a smile: "In fact, they are the same, except that one has this kind of tail fin and the other has no tail fin. In fact, there is not much difference between them in short-range design, and the bigger difference is in mid-range and long-range.

We are still in the experimental stage of these two types of bullets, but the finished products should be replaced with this type of bullet with plastic fins in the future. Although a plastic tail was added, its cost did not increase much, and the overall weight was not much heavier, only a few grams or a dozen grams, basically negligible. "

At this point, Wu Hao pushed out a bullet from the magazine and showed it to the two of them, "Compared with traditional bullets, this bullet is more aerodynamically designed, so its flight in the air The stance is more stable and the trajectory is straighter.

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

And Luo Kai and Pang Zhengqing finally saw the full picture of this bullet at close range. It is just like Wu Hao said that it has an underwater shape, and it is not much different from the traditional rifle bullet as a whole, but the details are still very big. .

For example, the overall appearance is bright metallic silver, and the tail of the warhead shrinks and is slender, with a plastic tail on it. If it hadn't been removed from the gun magazine and replaced elsewhere, both Luo Kai and Pang Zhengqing would have thought it was a child's toy, and they couldn't even imagine that it would be a bullet that could kill people.

(end of this chapter)

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