The day passed quickly. After putting down the weapons in his hands, Chen Eryi looked at his watch and saw that it was already five o'clock in the afternoon. The two of them were so excited that they even forgot to eat lunch. It was true. Weird enough. Li Jun touched his stomach and said: "No wonder I feel empty in my stomach. It turns out I didn't have lunch. Let's go and eat quickly. Eat more this time and make up for lunch." He trotted all the way to the canteen. Seeing the chefs in the canteen busy working in full swing, Li Jun hurriedly walked over with his lunch box and said, "Master Zhao, what's delicious today? Give me some more, I forgot to eat at noon." "Master Zhao is said to be from the Northeast, and he talks carelessly. He smiled and said, "Don't you oversleep at noon? Every time you eat. You are the most positive person. You kid can forget to eat unless the sun comes out in the west." Although he said this, he still gave Li Jun a full lunch box with three steamed buns on top. . "Don't believe it, I learned a lot from the master today, but I forgot to come to eat when I was so happy. My second brother didn't have lunch either. Let's not talk about it. I hurried to eat. I have to digest what I learned today. Where are the things? If the master inspects us tomorrow, I can't be embarrassed. " At this time, Chen Er has already prepared the food. Although the food here is much worse than in the 21st century, Chen Er originally had it. There are not so many requirements when it comes to food. Besides, the food here is sufficient, and it is definitely a high-level treatment. After all, in this day and age, there are still many people who have had one meal but not another. They are already doing too much good. After three strokes, five divided by two, the food in the lunch box was eliminated. Li Jun burped and said, "It feels so good to be full. I just want to sleep comfortably now. Second brother, tell me that the master will be there tomorrow." You don¡¯t know how to randomly check the knowledge given to us today?¡± Chen Er replied nonchalantly: ¡°How do I know this? I¡¯m not a master, but we must master this knowledge even if we don¡¯t randomly check it, otherwise we won¡¯t be able to follow it all our lives. Just hanging around behind the master, you have to have your own goals in life. When we leave the master and can be alone, we will truly repay the master." "Second brother is right. As a promising young man, we must have ideals, so I decided that we should work overtime and study, and strive to learn all the basic knowledge in one year, no, half a year, so that we can get to the front line of production as soon as possible. Only in this way can we better reflect our value. Let¡¯s go back home and continue studying.¡± From this day on, the two people began their own different struggles, and the talents of the two military masters also began to be revealed bit by bit. come out. On the second day, the two people arrived at the shooting range on time. As expected, the master Wang Shengli asked some questions about the knowledge he taught them yesterday. Because of their careful memory, they naturally answered the master's questions fluently. Wang Shengli nodded with satisfaction and said: "Very good, you really did not disappoint me. I originally planned to let you consolidate it again today. It seems that it is not necessary. Then we will continue to study today. If we follow this According to the progress, it is estimated that you will be able to go to the front line of production in half a year at most. Thinking about it, I studied with the master for a full year and a half. It seems that a high level of education really has a huge advantage in accepting new things. , We will have to recruit more college students in the future.¡± After that, he picked up a rifle and said, ¡°You must have noticed that this rifle is somewhat different from the two I introduced to you yesterday. This is called a Chinese formal rifle, and the prototype is The German-made 1924 Mauser rifle was mass-produced at the Jinling Arsenal in 1943. It is also the standard weapon of the National Revolutionary Army. The total length of the rifle is 1110 mm, the barrel is 600 mm, the caliber is 7.92 mm, and the total weight is 4 kg. The muzzle velocity was 810 meters per second, the sight range was 2,000 meters, and the effective range was 500 meters. "However, because China's domestic industrial base was too weak at the time and the manufacturing process was relatively poor, the effective range of most medium- and formal rifles was only 300 meters. Between 400 meters and 400 meters, only a few high-quality Chinese and formal rifles can achieve an effective range of 500 meters. However, generally speaking, Chinese and formal rifles can be comparable to Japan's 38-meter rifle, at least in terms of range, they are not much different. " Another point is that the Chinese official rifle uses 7.92 mm ¡Á 57 mm pointed bullets, which are extremely lethal and can be used with the bullets of widely used machine guns at the time, such as the Czech ZB26, "Type 24" Maxim and round bullets. Compared with warheads, pointed warheads have lighter weight and higher muzzle velocity. In addition, the warheads are streamlined, have low air resistance, good ballistic characteristics, and are not easily affected by cross winds. As a result, the range and accuracy of China's formal warheads are far greater than those made in Hanyang. " "Another advantage of the official model is that the internal parts and structures are basically the same, includingMost parts, including the machine, can be interchanged with just a little repair, and some can be used directly. The shortcoming of the medium-sized rifle is that it takes more effort to pull the bolt. In addition, when shooting continuously, the gun box and the bolt are closely connected due to thermal expansion, making the bolt more difficult to pull; the shooting accuracy and range are not as good as the Japanese style. Until the end of World War II, Japan was still producing the Type 38 Arisaka rifle with a total gun length of 1275 mm. The chiseled rifle is much shorter than the Type 38 rifle. In order to compete with the Type 38 rifle in hand-to-hand combat, the total length of its bayonet is about 575 mm, and the blade alone is 428 mm long. " "Compared with round-headed bullets with 38-inch caps, medium-sized and medium-sized pointed bullets are more lethal. Once they hit a person's torso, they will be seriously injured even if they do not die. Most of the guns currently in service in the army are still medium-sized and medium-sized. However, I believe that with the continuous advancement of the country¡¯s military technology, the Chinese and official rifles will become a thing of the past sooner or later. " "Now let me tell you about the structure of a bullet. Even if you look at a small bullet, it is a lot of knowledge. The bullet consists of four parts: the cartridge case, the primer, the propellant, and the warhead. When firing, the firing pin strikes the primer, causing the propellant to burn and generate gas to push the warhead out. ¡°Theoretically, the lethality of a bullet is determined by the interaction of penetration and stopping force. Bullet penetration, also known as penetrating power or penetrating power, refers to the ability of a bullet to drill into or penetrate an object. Its size is mainly determined by the mass of the warhead, the cross-sectional density of the warhead and the speed when it hits the object. It is usually expressed by the depth of penetrating a certain object. Stopping power refers to the effectiveness of the warhead to render the target incapacitated after it hits the target. The stronger the stopping force, the less time the target is incapacitated, and the weaker the stopping force, the longer the target is incapacitated. Since the structure of the human body is relatively complex, hitting different parts will produce different effects. Therefore, stopping power and penetration power are different and cannot be measured by a unified standard. " "After the bullet enters the human body, due to the shearing effect of the shock wave and its own kinetic energy, a cavity that is larger than the warhead volume itself is often formed. Since the muscles of the human body are elastic, the muscles will contract and recover after the bullet passes. Therefore, the cavity formed at the moment when the bullet passes is called an instantaneous cavity, and the trauma cavity formed after the bullet penetrates the human body is called It is a permanent cavity. Generally speaking, the larger the instantaneous cavity, the greater the stopping force, and the larger the permanent cavity, the greater the damage to the human body. The cavity test is an important test basis for studying the lethality of warheads. In the test, living experimental objects such as pigs and dogs are generally shot. The trauma of the test animals can be used to determine the size of the permanent cavity caused by the bullet, as well as the impact on the muscles and bones. The extent of the damage. " "Of course, the power of a bullet depends largely on the warhead. We are now studying how to achieve greater damage by increasing the mass of the warhead and changing the material and shape of the warhead. Wang Shengli lit a cigarette and gave Chen Er and Li Jun some time to remember. After four or five minutes, he continued: "I will teach you this much today. Do you two have anything to ask?" " Li Jun hesitated and asked: "Master, are the weapons in our country very different from those in Western countries? Why are these weapons produced in imitation of Western countries? It is said to be gunpowder invented by our ancestors. , why are the weapons of Western countries so advanced? " Wang Shengli lit another cigarette and said a little lonely: "Yes, our ancestors invented gunpowder, but later generations really failed to live up to it. In addition, the Qing government's policy of isolation from the country at that time was experienced by foreign countries. There have been more than one industrial revolution, but China has been on a continuous decline under the rule of the Qing government. This has led to the growing military gap. "But now it's better. With the establishment of New China, we have finally started our own path of creation. I believe it won't be long before we can see various weapons independently developed by the Chinese. I believe that in our four With the efforts of millions of Chinese people, this dream will soon be realized. ¡± Chen Er couldn¡¯t help but smile and thought to himself, hey, if it weren¡¯t for the help of a time traveler like himself, let alone ten or twenty years, half a century would not be able to catch up with the top military powers. However, Fortunately, everything is still in time. As long as they can get to the front line of production as soon as possible, the famous guns in their minds can be slowly manufactured. The learning process is usually boring, but for Chen Er and Li Jun. But it was a kind of happiness. Chen Er was reviewing his previous knowledge, while Li Jun was immersed in his own little world. The two of them remained silent like a tacit understanding, except for the occasional sound of pulling the gun bolt. The sound and the entire shooting range seemed to cooperate with them to achieve a state of unity between nature and man. £££££££££££££££££££££££££££££££££££££££££¡ª¡ªsp;The second chapter is here, the steamed stuffed bun rotates 720 degrees, please recommend it for collection, O(¡É_¡É)O haha~! ! ! ! ! ! ! ! ! ! ! ! ! I would like to thank "It's a Scoundrel" for the big reward, thank you! ! ! ! ! ! !