The time of the day passed quickly, put down the weapon in his hand, Chen Er looked at his watch, it was already five o'clock in the afternoon, and the two of them were so excited that they even forgot to eat lunch, which is strange enough. Li Jun touched his stomach and said: "No wonder I feel empty in my stomach, it turns out that I haven't eaten lunch, let's go, hurry up and eat, eat more this time, and make up for the noon." ”

Immediately, the two of them trotted all the way to the cafeteria, seeing that the masters in the canteen were busy with their work, Li Jun hurriedly walked over with his lunch box and said, "Master Zhao, what is delicious today, give me more, I forgot to eat at noon." ”

That Master Zhao is said to be from the Northeast, and he is also very grinning when he speaks, and he smiled and said: "You kid won't oversleep at noon, you are the most active every time you eat, you kid can forget to eat, unless the sun hits the west and comes out." Although he said so, he still gave Li Jun a full lunch box of dishes, and put three nests on it.

"Don't believe it, I learned a lot from the master today, and I forgot to come to dinner when I was happy, and my second brother didn't have lunch, don't say it, I'll go eat quickly, and I have to digest what I learned today for a while, if the master visits us tomorrow, I can't be ashamed."

At this time, Chen Er had already cooked the meal, although compared with the twenty-first century, the food here was much worse, but Chen Er didn't have so many requirements for eating, and the food here was enough, which was definitely a high-level treatment. After all, in this era, there are still many people who have eaten the last meal but have not eaten the next meal, and they are already much better.

After eliminating the food in the lunch box, Li Jun burped and said: "It feels so good to be full, I want to sleep comfortably now, second brother, do you think tomorrow will the master randomly check the knowledge handed over to us today?" ”

Chen Er replied indifferently: "How do I know this, I'm not a master, but even if we don't check this knowledge, we have to master it, otherwise we can't follow the master's ass for the rest of my life, and I have to have my own life goals." When we are out of the teacher and can be in charge alone, we will be able to truly repay the master. ”

"The second brother is right, as a promising young man, we must have ideals, so I decided that we should work overtime to study, strive for a year, no, half a year to learn all the basic knowledge, and be able to go down to the front line of production as soon as possible, so as to better reflect our value.

From this day on, the two began their own different struggles, and the talents of the two military masters began to be revealed little by little. On the second day, the two of them came to the shooting range on time, and the master Wang Shengli really asked questions about the knowledge taught to them yesterday.

Wang Shengli nodded with satisfaction and said: "Very good, you really didn't disappoint me, I originally planned to let you consolidate it today, it seems that there is no need for this, then we will continue to study today, if we follow this progress, it is estimated that you can go down to the front line of production in half a year at most." Thinking about it, I studied with my master for a year and a half, and it seems that I have a huge advantage in accepting new things because of my education, and I will be able to recruit more college students in the future. ”

After speaking, he picked up a rifle and said: "This rifle must also be a little different from the two introduced to you yesterday, this is called the Zhongzheng rifle, the prototype is the 1924 Mauser rifle made in Germany, and it began to be mass-produced in the Jinling Arsenal in 1943, and it is also the standard weapon of the National Revolutionary Army." The total length of the rifle is 111o mm, the barrel length is 6oo mm, the caliber is 7.92 mm, the total weight is 4 kg, the muzzle is 81o meters per second, the gauge range is 2ooo meters, and the effective range is 5oo meters. ”

However, due to the weak level of China's domestic industrial base and poor manufacturing technology at that time, the effective range of most medium and formal rifles was between 3oo meters and 4oo meters, and only a very small number of high-quality medium formal rifles could reach an effective range of 5oo meters. However, on the whole, the Chinese rifle can be comparable to the Japanese 38 big cover, at least in terms of range. ”

Another point is that the Chinese formal rifle uses 7.92 mm x 57 mm pointed bullets, which are extremely lethal and can be used with the bullets of the machine guns widely used at that time, such as the Czech ZB26 and the "24 type" Makqin. Compared with the round-headed projectile, the bullet head of the pointed head is lighter in mass and higher in the beginning, and the warhead is streamlined, the air resistance is small, the ballistic characteristics are good, and it is not easy to be affected by crosswinds, so that the range and accuracy of the medium and formal bullets are far above those made in Hanyang. ”

Another advantage of the formal is that the internal parts and structures are basically the same, and most of the parts, including the bolt, can be interchangeable with a slight file, and some can be directly used. The disadvantage of the medium formal is that it is more laborious to pull the bolt, and in addition, when firing continuously, the magazine and bolt are tightly attached due to thermal expansion, and the bolt is 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 continued to produce the Type 38 Arisaka rifle with a full length of 1275 mm. The Zhongzheng rifle was much shorter than the Type 38 rifle, and in order to compete with the Type 38 rifle in white-knuckle combat, its bayonet was about 575 mm long, and the blade part alone was 428 mm long. ”

"Compared with the round-headed bullet of the 38 big cover, the formal pointed bullet is more lethal, once it hits the torso of the person, even if it does not die, it is seriously injured, and most of the guns in service in the army are still mainly in the formal, but I believe that with the continuous progress of the country's military science and technology, the formal rifle will become a history sooner or later."

"Let's talk about the structure of the bullet again, don't look at a small bullet, the knowledge is also big, the bullet is composed of four parts: the cartridge case, the primer, the propellant, and the warhead. When firing, the firing pin hits the primer, causing the projectile to burn, and producing gas to push the warhead out. ”

"Theoretically, the lethality of a bullet is determined by the interaction of penetrating and stopping forces. Bullet penetration, also known as penetration or penetration, refers to the ability of a warhead to penetrate or penetrate an object. Its size is mainly determined by the mass of the warhead, the cross-sectional density of the warhead, and the degree of impact on the object, and is usually expressed in terms of the depth of penetration of a certain object. Stopping force refers to the effectiveness of the warhead to incapacitate the target after hitting it. The stronger the stopping force, the less time the target loses mobility, and the weaker the stopping force, the more time the target loses mobility. Due to the complex structure of the human body, hitting different parts will have different effects. Therefore, stopping force is not the same as penetrating force, and cannot be measured by a unified standard. ”

"After the bullet enters the human body, due to the shear effect of the shock wave and its own kinetic energy, it often forms a cavity larger than the volume of the warhead itself. Since the muscles of the human body are elastic, the muscles will contract and recover after the bullet passes through the body, so the cavity formed by the bullet is called the instantaneous cavity, and the traumatic cavity formed after the bullet penetrates the human body is called the permanent cavity. Generally speaking, the larger the instantaneous cavity, the greater the stopping force, while the larger the permanent cavity, the greater the human injury. The cavity test is an important test basis for studying the lethality of the warhead, and in the test, it is generally tested by shooting pigs and dogs, and the size of the permanent cavity caused by the bullet can be determined by the trauma of the test animal, as well as the damage to the musculoskeletal body. ”

"Of course, the power of the bullet depends largely on the warhead, and we are now working on increasing the mass of the bullet and changing the material and shape of the bullet to achieve greater damage."

Wang Shengli lit a cigarette and gave Chen Er and Li Jun some time to remember, and after four or five minutes before continuing: "I'll teach you so much today, do you two have anything you want to ask?" ”

Li Jun hesitated for a moment and asked: "Master, is there a big gap between our country's current weapons and Western countries, why are these weapons produced in imitation of Western countries, if you want to say that it is the gunpowder of our ancestors, why are the weapons of Western countries so advanced?" ”

Wang Shengli lit another cigarette and said a little lonely: "Yes, our ancestors knew the gunpowder, but it is really the descendants who are not angry, coupled with the Qing government's policy of closing the country to the outside world, foreign countries have experienced more than one industrial revolution, but China has been going downhill under the rule of the Qing government, which is the military gap is getting bigger and bigger." ”

"But now, with the establishment of New China, we have finally begun our own road of creation, I believe that it will not be long before we can see all kinds of weapons independently developed by the Chinese, and I believe that with the efforts of our 40,000 Chinese sons and daughters, this dream will soon be realized."

Chen Er also couldn't help but wonder, and said in his heart, hey, if it weren't for the help of his own traverser, let alone ten or twenty years, half a century has passed and he has not been able to catch up with the footsteps of the top military powers. But fortunately, it's still too late now, as long as you can do your best to get to the front line of production, those famous guns in your mind can be slowly manufactured.

The learning process is generally boring and boring, but it is a kind of happiness for Chen Er and Li Jun, Chen Er is reviewing his previous knowledge, and Li Jun is immersed in his own small world, and the two of them are full of tacit understanding to maintain calm, except for the occasional sound of pulling the bolt, the entire shooting range seems to cooperate with them to reach a state of unity between heaven and man.

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The second chapter is here.,Buns reflexively rotate 72o degrees to ask for collection recommendations.,o(n_n)o haha~!!!!!!!!!!!! Thank you for the big reward of "being a scoundrel", thank you!!!!!!

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