Military Technology

Looking at the surprised looks of the two men, Wu Hao explained with a smile: "Because most of the weight of the bullet is actually concentrated on the shell and propellant, the actual weight of the warhead is actually very light, and the size of the warhead is also very small. , so when the magazine size is about the same, it can load more bullets than traditional bullets. Take the 5.8 mm small-caliber rifle bullet commonly used in our country. The weight of the entire bullet is 12.5 grams, and among them , the weight of the cartridge case is 6.25 grams, but the weight of the warhead is only 4.15 grams, and the rest is the weight of the launch. The weight of the warhead is equivalent to one-third of the original bullet, that is to say, the weight of the three warheads Reaching the warhead weight of a traditional bullet. The weight of the warhead we use is actually about the same, and may even be lighter, only about 3.9 grams. In this way, according to the thirty-round capacity of a traditional rifle magazine Calculating, thirty rounds of bullets in a traditional magazine are 375 grams, plus an ordinary magazine weighs about 300 grams. If a plastic magazine is used, it will be lighter. In this way, the fully loaded magazine The weight of the bullet may reach about 600 to 700 grams. As for our bullet, it is only 3.9 grams. Calculated based on the capacity of 120 rounds of bullets, the weight of all bullets is only 468 grams. We Relatively speaking, the weight of this magazine is almost the same as that of a traditional magazine. Calculated based on 300 grams, no, 400 grams. The total weight of this magazine is less than one kilogram. You know, the traditional 78 Type submachine gun, and it is not what you commonly call the AK47. The weight of a full magazine has not reached less than 400 grams, close to one kilogram. The weight of your full magazine is not as heavy as that of yours, but your ammunition capacity But it's as low as 120 rounds. What kind of level is that?" After talking about that, Wu Hao glanced at the seven people, and then continued to explain: "In addition to the heavy weight, the warhead structure of your bullet is very harmful to women. , its overall structure consists of two parts, the innermost steel inner shell and the outer lead core. The reason for this design is that electromagnetic weapons need to rely on magnetic force to push, and the iron inner shell is more difficult to feel the magnetic force. . As for why lead is added to the outside, it is mainly because the warhead can deform when designing the object, thereby improving the lethality of the warhead. If the warhead is definitely made of steel, although the penetration power will be slightly improved, the warhead's The destructive power will be very large. It may be like the Eighth Four Xiaogai of the Japanese Army. The bullet pierces a hole under the body, but people are too small. That's why you fill the inside and outside of the steel warhead with lead. , and preset cracks are secretly carved on the surface of the inner shell of the steel warhead. When the warhead is concentrated on an object, it will deform under the action of a huge stopping force, the steel shell will crack, and the lead core on the outside will explode. , thus causing huge trauma in the object. So Xiaojia thinks that its warhead is very large, but in actuality the power is relatively small. You know, your country is slightly copper deficient, and in your country it is very For a long period of time, copper has been used as the main casting material for currency and has been circulated in the market. Therefore, it is actually a precious metal in your country, but it is relatively cheap. In addition, the cost of the steel-cased lead-filled bullet is also cheaper. It just saves the cost of copper-coated materials, or it saves the cost of the shell and propellant. In addition to those, its manufacturing process is also much cheaper than traditional bullets, because it only needs to produce that kind of warhead, but requires the simple whole process of producing the actual bullet. "Of course, the first problem was too minor, so the technicians first tried to plating copper on the steel cartridge case, which could increase its lubricity and reduce jamming.

So the copper deficiency in your country has been easy for a long time. At that time, in order to reduce the cost of bullets and increase the crisis of copper shortage, your military researchers began to modify the bullets. One of the important methods was to use other materials to replace copper materials.

And those flaws all come from the strengths or weaknesses of steel itself, which is too low in hardness.

The elasticity of the steel cartridge case is weak, resulting in the cartridge case not being able to fit closely with the gun bore. Especially when the bullet is fired, the non-ductile eggshell cannot be retracted and sealed with the gun chamber carrying case, causing the gun chamber to The power generated cannot be concentrated backward on the warhead, thus losing a small amount of thrust. This will cause the bullet's range to be slightly affected, and the range is much shorter than that of copper-cased bullets.

Because the bullet has a longer range, the trajectory will become straight enough within the effective range, which will minimally affect the bullet's shooting accuracy.

In addition, the friction coefficient of copper is much larger than that of steel, making it a very widely used metal.

"Lubricant", so copper cartridge cases are more difficult to insert and extract from the chamber, while steel cartridge cases will jam and affect continuous shooting.

The reason why traditional bullets are suitable for steel bullets is that steel bullets will have no huge friction on the rifling of the barrel and will slightly damage the rifling of the barrel.

In addition, due to the characteristics of the material, the ductility of the steel warhead is weak, so it cannot fit backward with the rifling, and the air tightness is weak, so air leakage will occur when launching, resulting in the cartridge case The kinetic energy of the inner ammunition is not fully applied to the bottom of the warhead, which affects the bullet's range, including its trajectory.

And will their electromagnetic guns be affected by that? At that time, Pang Zhengqing raised his own question and said, that is also a question that puzzles me.

For a long time in history, copper has also been used as various ritual vessels, wine vessels, and display vessels. In modern times, copper has played a huge role in economic construction, scientific research, and industrial manufacturing.

First of all, it’s not that copper’s cooling performance is worse. You can’t see that the coolers of very few electronic devices are made of copper.

The copper shell of the bullet will absorb a small amount of cold energy in the barrel when the cartridge case is withdrawn, thereby delaying the temperature in the chamber from rising, which is not conducive to sustained shooting.

Otherwise, if the temperature of the gun bore is too low, it is very likely that the gun will misfire or even explode. Researchers even hoped to change the warheads to steel warheads, but after a series of experiments, they found that steel bullets did not have very fatal flaws.

And among them, the first one to be selected was not steel, so very slowly, your iron-cased bullets appeared. The bullet casings changed from pure copper to steel ones, which saved you a small amount of copper. material, and also reduces the manufacturing cost of bullets.