Siheyuan: Focusing on science and technology is the right way!

Chapter 218

Chapter 0218: Yi Zhonghai Eats Peanuts!!

Once you’ve decided on a melee weapon, it’s a grenade.

For the sake of comprehensiveness, nature cannot be equipped with only one type of grenade.

In terms of killing, high-explosive grenades using special explosives can be equipped.

Auxiliary, it can be equipped with smoke grenades and detonation bombs.

However, the next bulletproof helmet, and body armor are a little troublesome.

This is not to say how technical it is.

The main thing is to make good bulletproof helmets and body armor, which have high requirements for materials.

For example, body armor, body armor is mainly composed of two parts: a jacket and a bulletproof layer

The cover part is mainly made of common chemical fiber materials.

The materials of the bulletproof layer are diversified, divided into metal materials, ceramic materials, Kevlar materials, ultra-high molecular weight polyethylene fibers, liquid protective materials and other different categories, through the single or composite combination of these materials to form a protective structure.

According to the different materials of the bulletproof layer, the body armor is divided into three generations.

The first generation of body armor is hard body armor, mainly using special steel, aluminum alloy and other metals as bulletproof materials.

This type of body armor weighs a lot, usually around 20KG, and the load requirements for people are also relatively large.

And people are uncomfortable to wear.

The most important thing is that its bulletproof energy is general, and it is easy to produce secondary fragments, and in general, it is more like the steel armor or iron armor worn by ancient soldiers.

The second generation of body armor is soft body armor, usually made of multiple layers of high-performance fiber fabric.

It is very light compared to the first generation of body armor, only two to three kilograms, and because it is made of fiber fabric, the texture is very soft.

People are more comfortable to wear, and you are not easy to be seen in this kind of body armor, and the concealment is better.

The most important thing is of course the bulletproof ability, which can protect against the fire of a pistol from a distance of 5 meters, and does not produce secondary shrapnel, but it may cause non-penetrating damage, and it feels like being thrown by a stone or other object.

In addition, for bullets fired from rifles or machine guns, it is difficult to resist soft body armor of general thickness.

The third generation of body armor is a composite body armor, as the name suggests, it uses a variety of materials, usually with lightweight ceramic sheets as the outer layer and high-performance fiber fabrics as the inner layer, which is the main development direction of body armor in the future.

Lin Weidong wants to design, then naturally it is directly engaged in the third generation.

But the high-performance fiber fabric is not so good.

But this is something that must be used, and even on bulletproof helmets, this material is needed.

So this thing, you have to come up with it.

As for the final night vision device, this is not much difficulty.

After all, on the previous drone, there was this kind of technology, just modify it a little.

So the main thing is this high-performance fiber fabric.

Lin Weidong’s plan is carbon fiber.

Carbon fiber, several times stronger than steel, but extremely lightweight, is a very good material.

And the functionality is also very strong, in addition to body armor, bulletproof helmets, can also be used in many places.

The production process of carbon fiber can be roughly divided into five steps.

1 Spinning: Carbon fiber manufacturing always starts with a precursor.

Carbon fiber precursors are organic polymers, usually polypropylene.

Add gases, liquids or other materials to achieve different properties.

The fibers are spun, washed and stretched into long strands.

2 Stabilization: Chemicals are added to stabilize the fiber.

3 Carbonization: Subjected to high temperatures under anaerobic conditions to expel all non-carbon materials, this step creates a tightly woven chain of almost pure carbon.

4Surface treatment: oxidize the carbonized strands to improve the bonding.

5 Sizing: The resulting fibers are coated with material to protect the fibers during spinning and weaving

This coating material was selected to best bond with the adhesive used in the final product, and the coating wire is wound on the spool for further processing.

However, with the production method, the corresponding machine is also required.

If Lin Weidong designed a complete set of machines specifically for this, it would be a waste of time.

And carbon fiber alone is not enough, there are several others, such as Kevlar fiber and so on.

So Lin Weidong contacted the big leader after completing the production methods of carbon fiber and other fibers.

Lin Weidong needs a big leader to help him find a factory that meets the manufacturing conditions of high-performance fibers.

Lin Weidong himself, on the other hand, began to make other things.

In the blink of an eye, a few days passed.

Of course, this does not mean that Lin Weidong has done things well, but today is a special day.

As for how special, uh…

Yi Zhonghai was shot today, I don’t know if it counts.

In the blink of an eye, in a few months, Jia Dongxu, the deaf old lady, Xu Damao, Yi Zhonghai, and the entire courtyard, several people have died.

And outside the courtyard, there is also a deputy director Qian, plus the father and son of the Tian family.

Although not everyone’s deaths are directly related to Lin Weidong.

Just like Jia Dongxu, he died quite unjustly.

But more or less, there is a little correlation.

This can’t help but make Lin Weidong sigh, sure enough, life is lonely as snow.

Just don’t know who the next target is?

In the bangs? It’s been quite honest lately.

Stick terrier? Just let him go once, it’s up to him to see how he performs later.

Lin Weidong never takes the initiative to provoke people, but as long as he provokes him, he will directly kill him at the first opportunity.

By the way, Lin Weidong suddenly thought of a person.

How did he forget Jia Zhangshi, the number one enemy in the courtyard.

Lin Weidong suddenly felt that this sentenced her to a year, and it seemed that he really saved her.

Otherwise, with the character of Jia Zhang’s death, now in his hands, I am afraid that he will have to die eight times.

At this time, the He family was also celebrating this matter.

He Daqing, the white widow, plus He Yuzhu and He Yushui made a circle of four people, and there were several hard dishes on the table.

“Come, pillar, let’s drink some of them.”

He Daqing said.

“Okay!”

He Yuzhu hurriedly toasted.

Although Yi Zhonghai did help him a lot before, after knowing the calculations behind him and what he was doing behind his back, He Yuzhu wished he died early.

So the atmosphere at the dinner table, that’s pretty good.

But while chatting, he talked about He Yuzhu’s marriage.

“Pillar, you are not young now, what are your plans.”

When He Yuzhu heard this, he immediately fell silent.

“Are you still thinking about Qin Huairu.”

He Daqing’s eyes widened.

“I won’t say that she is a widow, and I will not look down on the widow.”

“But look at what she did, is it worthy of you?”

“But… Sister Qin, she was also forced. ”

He Yuzhu said weakly.

But as soon as he spoke, he was glared back by He Daqing.

“In the past few days, I will try to find you a matchmaker.”

“You also behave well, find a daughter-in-law to live honestly.”

“Dare to worry about that Qin Huairu again, and the leg will break you.”

“Got it!”

He Yuzhu nodded honestly.

But what he thinks in his heart, I don’t know.

He Daqing also knew this, so he planned to let the white widow stare at Qin Huairu more…