Siheyuan starts from a good life

"Finally done." After finishing the drawing of the last part, Jiang Yan stretched.

Seeing the large pile of drawings on his desk, Jiang Yan nodded with satisfaction. At first, Jiang Yan felt that he had the drawings of the AK-47 and SKS semi-automatic rifles, plus some of the drawings of the "August st" rifle. He copied them by himself. It will be quite simple when you come out, but when you actually start research and development, you will find that it is not an easy task.

An excellent firearm design needs to comprehensively consider the following aspects:

Shooting accuracy: Shooting accuracy is an important indicator of firearm performance. Good firearm design can reduce the dispersion circle and improve ballistic stability, making it easier for shooters to hit targets.

"Yes, of course."

The shape of the "August 14" automatic rifle that Jiang Yan copied adopts the shape of the CS/LR47 automatic rifle that was later called the "ultimate modified version of the August 47st" by military fans. This shape is similar to SL's AK- 's appearance is completely different, closer to the appearance of Western firearms. Later, people from other countries called the "AK-" the national version of AK-.

After eating the watermelon, Jiang Yan said to Xu Damao who was cleaning up the watermelon rind: "After you finish cleaning up later, go and call Master Sun Deshui into the office. I have something to do with him."

"Master Sun is here, sit down quickly and Damao will give Master Sun a glass of water."

"Does Lao Guo have it?" Jiang Yan asked after taking a mouthful of watermelon.

The old-fashioned electric fan above his head was squeaking. Jiang Yan opened the drawer and took out a pack of cigarettes. He took out one, lit it and took a puff.

"Boss, eat the watermelon quickly. The watermelon from Shajuan is particularly sweet."

Ease of use: Ease of use is an important indicator of the quality of firearm design. Excellent firearm design should be easy for users to operate, maintain and clean to reduce the difficulty of use and maintenance costs.

There is no so-called freedom to eat melons in this era. The domestic watermelon varieties are limited and the planting area is not large. They are rare. If I remember correctly, Academician Wu, the mother of watermelons, should have just entered the Western Regions to study melons at this time. As a result, it is estimated that it will take many years for the country to realize the freedom to eat melons.

After taking two puffs on a cigarette, Xu Damao pushed open the door and walked in with a few watermelons.

Although I have a series of drawings and information as a reference, I still have to solve some problems such as firearm structure problems, fire control system problems, aiming devices, etc. There are some things that I only know a little about.

Now that we have entered August, although the temperature in Bingcheng is lower than that in Sijiu City, the weather is still very hot at noon, making people feel breathless.

"Where did the watermelon come from?" Jiang Yan took another bite before asking Xu Damao.

Adaptability: Firearm design should take into account the needs of different users and have certain adaptability. Through adjustable design, modular structure, etc., the firearm can adapt to different usage scenarios and user needs.

When Sun Deshui asked, Jiang Yan stood up, took out a piece of drawings from the table and handed it to him and said, "I invented something small, let's see if you can produce it, Master Sun."

At this time, Xu Damao finished eating a piece of watermelon before he said: "We bought a batch of watermelon on the site, and every worker has a share. Through the relationship, Lao Guo led me to put your portion of watermelon in the refrigerator in the kitchen. I chilled it and brought it to you when it felt almost ready."

The magazine was modified, a guide rail was added, and the butt became a foldable butt. The Type 81 designed by Jiang Yan is the same as the original Type 81. It uses a short-stroke piston gas guide system and retains the advantages of the empty magazine hang-up mechanism. Almost every one was missing, and Jiang Yan tried his best to correct his original shortcomings.

Along with the "August 40" assault rifle, Jiang Yan also designed a matching squad machine gun. The interchangeability of their two parts can reach %.

Therefore, the new "August 1st" copied by Jiang Yan is a level better than the original one.

浜屽叚Banduo笁:cbanduo簩锲:cbanzuo浂a:c锲涗竴涓::涓変笁

Safety: Safety is the first principle in firearm design. When designing, it is necessary to consider various possible misoperation situations and set up safety devices to avoid accidental injuries.

After the two people sat down, Sun Deshui said, "I don't know what Mr. Jiang wants to see me for."

After hearing Xu Damao's words, Jiang Yan, who was sorting out information, looked up and saw Sun Deshui coming in and greeted him quickly.

Fortunately, there are many engineers who specialize in designing firearms in the 663 factory where he works. Jiang Yan often consults them on these things. Even the library of the factory is a place Jiang Yan often goes to.

Unexpectedly, it took me three full months to do this. Fortunately, I finally copied this firearm.

After hearing that he had a share, Jiang Yan could eat the watermelon with confidence.

The "August 955st" assault rifle copied by Jiang Yan has a total gun length of 455 mm, a barrel length of 3.8 mm, and an empty gun weight of 8 kg. There is room for a bayonet. The 720 rifle is equipped with a safety, and can choose single shot or three-shot. Round or continuous fire, the muzzle velocity is 650 meters per second, the theoretical rate of fire is 400 rounds per minute, and the effective range is meters.

Taking into account that our country will adopt small-caliber automatic rifles with a caliber of 5.8mm in the future, the calibers of the Type 81 gun family developed are divided into two types: 7.62mm and 5.8mm.

After about ten minutes, Xu Damao, sweating profusely, brought Sun Deshui to Jiang Yan's office.

A mature firearm not only has the above but also includes various necessary tactical accessories, such as additional grips, sights, etc.

"Boss, I brought Master Sun here."

Comfort: Comfort is an important factor affecting user experience. A good firearm design needs to consider the shooter's comfort during use, including the grip, trigger, recoil, etc., to improve the stability and accuracy of shooting.

Jiang Yan's eyes lit up when he saw the watermelon that Xu Damao brought over. He put out the cigarette that he had not taken a few puffs on, took a bite of the watermelon that Xu Damao brought over. To be honest, this watermelon is really sweet, and The watermelon he brought seemed to have been chilled. In this summer, it was really worth buying a mouthful of iced watermelon.

Reliability: The reliability of firearms is directly related to the life safety of users. Excellent firearm design should ensure that the firearm can work normally in various harsh environments and reduce the failure rate.

"I understand, boss, I'll call him over right now." After packing his things, Xu Damao walked out of his office carrying the watermelon rind.

Hearing Jiang Yan's words, Sun Deshui did not speak but took the drawing handed over by Jiang Yan and looked at it carefully. After looking at it, Sun Deshui frowned slightly. This thing is a bit too simple. He just pulled out a second drawing from the factory. Advanced workers can create it.

He closed the drawing and said to Jiang Yan: "No problem, it can be produced. This thing is not difficult."