Chapter 110： Ready to upgrade the shelter

[Protection Door Strengthening Plan 1: Strengthen the thickness of the protective door, improve the blast resistance, and install a reinforced metal frame on the surrounding wall. Materials needed: iron ingot *100, No. 1 alloy ingot *50. Prerequisites: Level 4 Engineer, Level 1 Defense Expert. 】

[Protection door enhancement plan 2: Add a layer of auxiliary protective door on the original foundation, add invisible coating on the outside, reduce the heat transfer effect and improve the resistance effect of the metal detection device. Materials needed: Iron ingot *30, No. 5 alloy ingot *30, No. 3 paint *10. Prerequisites: Engineer Level 4, Chemist Level 2. 】

These are the two renovation plans given to him by the system after An Kai decided to renovate the shelter.

The former focuses on defense, while the latter focuses on concealment. Of course, you can also choose to do both at the same time to enhance defense and concealment.

It's just that the material consumption is terrible in this way.

Apart from anything else, just two alloy ingots and one special paint need to consume a lot of common materials.

These alloy ingots do not have a clear name. The system just gives them a number. The specific effect will be introduced on the manufacturing page. Of course, An Kai actually doesn’t need to understand that. What he wants to make and if the materials used are similar synthetic materials and he doesn’t have them, the system will automatically provide a synthesis scheme, for example, he needs If he does not have a certain alloy, he can make it directly as long as he selects the alloy in the material list on the page of the item he wants to make, without having to enter the page of the alloy.

The system is so convenient and simple. Of course, if An Kai wants to do research, this method will definitely not work.

But for now, this manufacturing method is obviously more convenient.

Not only the protective door needs to be strengthened, but the interior of the shelter also needs to be modified. For example, sound insulation and heat insulation measures must be done well, and he must try to find the possibility of the zombies or the humans behind it.

Make the shelter as invisible as possible.

Of course, this stealth does not mean the direct disappearing technology of the fantasy world.

The so-called stealth technology is also known as low detectable technology or target feature control technology. It is a comprehensive technology that changes the detectable information characteristics of targets such as weapons and equipment, making it difficult for the enemy's detection system to detect or shorten the detection distance. As an interdisciplinary subject, it integrates technologies in many fields such as fluid mechanics, materials science, electronics, optics, and acoustics.

Specifically, it is a technology that reduces the detectable information characteristics of targets such as weapons and equipment, making it difficult for the enemy's detection system to detect or reducing the probability of detection, so that the defense system has no time to counterattack by the time it is discovered. As the reconnaissance and detection systems on the modern battlefield mainly include radar, infrared, electronic, visible light, and acoustic wave detection systems.

For example, the most familiar stealth aircraft is the representative of technological development in this area.

This is an all-round improvement from shape to material, and the relevant content can be applied to the shelter. .

First of all, avoid the use of large and vertical vertical surfaces on the shape of the stealth aircraft, preferably a concave surface, so that the scattered signal can deviate from the radar trying to receive it. At this point, the protective door of the shelter can become more sleek, and at the same time, the less the gap with the mountain, the better. It is best to have the protective door directly on the same side of the mountain, so that it will not be easily found by radar. Outlier.

Secondly, the stealth aircraft uses non-metallic materials or radar absorbing materials to absorb rather than reflect the energy from the radar.

Radar absorbing materials are divided into two categories, one is resonance type, and the other is broadband type. Among them, resonant radar absorbing materials are designed for a certain frequency, based on magnetic materials, and can combine destructive interference and attenuation. Broadband radar absorbing materials are usually made by adding carbon-energy-consuming plastic materials to a matrix such as polyurethane foam, which maintains effectiveness in a fairly wide frequency range.

At this point, the No. 3 paint required by the system is used for this. Ankai really doesn’t understand the specific principles. The materials used seem to be very simple, but this paint can absorb radar detection waves. Better hide the shelter.

In addition, minimizing strong reflection points or “bright spots” of the fuselage, engine noise, and heat radiation from the fuselage are all important conditions for invisibility. Because of the existence of these aspects, it is easy to "sell" the existence of the aircraft.

The same applies to the shelter.

So he wants to transform the walls of the shelter to isolate the heat and sound as much as possible. If possible, he would rather not release any sound or heat.

Including the air exchanger, it needs to be specially modified. When exchanging the internal and external air, try not to exhaust the hot air directly. In this way, even if someone uses a heat source to find a shelter, it will be difficult for the first time. turn up.

This project is big or small, and it takes Ankai to spend a certain amount of time to get it done.

The so-called next day, they will be more serious when they go out to find materials. Of course, food and other things will also be brought back, but they are no longer the most important materialsOn the contrary, materials are more important.

I don’t know how Guy described Ankai’s luck. When the team went out for the sixth time after the expansion, Ankai found a chemical plant.

And Curry, who lived here before, didn’t know the existence of this chemical plant. It can only be said that the scale of this plant is too small, and the things it produces are not up to the table. The most important thing is that the production capacity is too small. Even the needs of the riverside area cannot be met. There are not 100 or 80 such factories in the riverside area. Naturally, it is impossible for every factory to be known.

An Kai and the others met a group of survivors here. Fortunately, the other party occupied the workshop position. After the two sides confronted each other for a while through a passage, An Kai said that he only needs the chemical raw materials in the warehouse, and the other party certainly does not. Those who are willing to believe him, after a simple communication, finally An Kai is willing to buy the ownership of the materials in the warehouse for the price of a submachine gun and 300 rounds of bullets.

He is mainly unwilling to fire at the opponent.

In fact, if he insists on taking away the things in the warehouse, he is sure that the opponent will not come out to make trouble. After all, once the door is opened, the radiation dust from the outside may enter the workshop. These people should have collected enough food before to rely on a small workshop to save themselves. They certainly wouldn't dare to go out casually... But An Kai didn't want to take a risk, so he just gave each other a gun and some bullets.

For myself, these materials are undoubtedly more important, and a submachine gun in a mere submachine gun cannot threaten them.

The 　　 enhanced protective clothing is not something that a submachine gun can break casually.

With this wave of transactions, An Kai and the others have successfully obtained a large amount of materials. In this way, the upgrade plan of the shelter can finally officially begin.