My Post-Apocalyptic Shelter Levels Up Infinitely! - Chapter 167

[Chapter 166 Build a gun, open the firearms technology tree!]

The six-hour trading time arrived at three o’clock in the afternoon. As Soma stepped out of the gate of light, the golden light behind him shattered twenty or thirty seconds later.

The light gradually turned into a spot of light, fell to the ground, and merged into the snowdrift.

In addition to passing through the shelter, at this time, the materials like a mountain have been piled up, and the calmness of the past has returned to the depression.

The 3,200 units of iron blocks, divided into two floors, have been densely covered around the underground shelter, covering an area of about three or four acres.

The same is true for the copper blocks. On the left side of the underground shelter, they are neatly stacked and lying on the ground.

With the current storage area of the underground shelter, it is impossible to store these materials even if they are doubled several times, and they can only be temporarily piled up outside.

“It’s good, in the depression, no one else can detect me. There are so many neighbors here, and I’m not afraid of being stolen when I store it outside.”

Walking on the iron block, with Oreo’s vigilance, Soma is not afraid of caring people at all. Come and steal resources near the shelter.

Even if there is, just relying on these people’s small and pitiful storage space, they can’t take much at a time, so don’t worry at all.

Using the storage space, after moving all the surrounding steel into the garage, he picked up the five-unit copper block, and Suma went to the second floor to turn on the generator.

After several days of adventures and rushing, I even almost lost my life before I exchanged the supplies.

Finally, on the last day, it evolved into strength!

Looking at the small thermal weapon laser manufacturing machine that has already started self-checking, Soma is excited.

The steps to use the laser machine are not difficult, and after adding the magic modular technology, manufacturing has been simplified a lot.

You only need to select the weapon to be made first, put the required materials in as required, pass the machine tool inspection, and then you can perform a fool-like placement operation, and wait for the finished product to be released.

“Modular technology is indeed a good thing, but unfortunately we haven’t acquired a single modular machine tool this time.”

“But even if there is, these people won’t necessarily sell it unless they are dying.”

Shaking his head, put away some greedy ideas, Seeing that the green light was already on after the self-test was over, Soma lightly clicked on the M-1 rifle, and the material requirements popped out.

Three units of steel, two units of iron, one unit of copper, one unit of wood, two units of water, and

ten kWh of electricity!

The machine tool also has its own battery module, which needs to be fully charged first to ensure that it can start when it is higher than the manufacturing value.

This is a requirement for the possibility of manufacturing failure due to sudden power failure, or damage to the machine tool.

Seeing that the fast charging has started in the lower right, Soma is not in a hurry and patiently sits in front of the machine and waits.

The construction of firearms involves some specifications that look simple but are actually very complex. For example, rifling is a very simple and very important part.

Rifing, also known as double line. Because its cross-sectional shape is similar to a windmill, it is also called a windmill line.

Rifling can be said to be the soul of the barrel. The function of rifling is to give the bullet the ability to rotate, so that the bullet can still maintain a given direction after it is discharged from the chamber.

Although the use of rifling was recorded in the 15th century, it was not popularized until the 19th century due to difficulties in the manufacturing process.

Without the relevant knowledge reserves, Somo can only hope that the machine tool will be powerful and make no mistakes!

Half an hour later, charging was completed. Looking at the manufacturing button that popped up on the side of the machine, Soma looked holy, and gently put all the materials into the storage module of the machine, which is currently only one square. Press the manufacturing button with both hands to start the machine. Making firearms for the first time!

creak! creak!

The harsh sound was accompanied by a little shaking, and as the button was pressed, it began to burst out of the machine from the inside out.

A terrifying high-pitched cutting sound not only startled Soma, but even the big and small Sparks on the second floor screamed in fright.

The upper laser probe begins to rotate slowly under the force of the machine tool.

Before Soma could take a good look at how the machine tool made weapons, an iron cover suddenly rose from both sides of the machine tool.

Driven by the motor, the cover began to slowly form a spherical ball, leaving only a few cooling holes, which completely covered the entire machine tool.

Then, a dazzling light burst out from the heat dissipation hole of the hood, and the reflected laboratory room was unusually bright.

The high temperature brought by laser cutting began to float out with the heat dissipation holes.

Gradually, seeing the temperature getting higher and higher, Soma simply summoned the lion’s wind and began to dissipate heat from the big iron ball.

When this cycle was repeated for five minutes, the light began to fade.

puff!

With the burst of water vapor, the cover began to fall slowly, revealing the true content inside.

At this time, in the place where the finished product was ejected, there was already a freshly baked gun, with a distinctive shape and a very aggressive appearance.

From the head of the gun to the tail of the gun, he looked at the body of the gun carefully. At the moment of harvest, Somo calmed down.

When the green indicator light came on again, indicating that Soma could take the gun, the temperature of the M-1 rifle also dropped and reached a stable temperature.

Picking up the gun, Soma first felt the weight.

“It’s not heavy. The weight of an empty gun is about five pounds. If you add bullets, it should be between six and six and a half pounds.” After

removing the magazine, Su Mo looked at the capacity.

The magazine is equipped with a caliber of 5.56 x 45 mm, using STANAG magazines similar to those on Earth, with a standard capacity of 40 rounds.

“If you don’t consider the name and the different pattern designs above, it’s really a pirated m4a1”

Stroking the complicated patterns on the gun, Somo was not sure how powerful it was, so he could only try to continue to open the machine to make ammunition.

The M-1 rifle uses the M193 rifle cartridge, which is the conventional 45mm caliber. This small-caliber rifle cartridge has a huge lethality that is not commensurate with its size.

The M193 bullet has no steel core, the bullet is filled with soft lead, and the copper skin wrapped around the bullet is very thin, so the entire bullet becomes very soft.

After hitting the target, the bullet will quickly deform and shatter, and the bullet fragments will form a multi-channel penetrating wound (that is, a bullet punches several holes), causing severe bleeding.

However, the technology tree of firearms is not as simple as making firearms.

The biggest problem facing all wasteland humans at present is the preparation of ammunition.

Even if the materials of the underground shelter are strong at present, if you want to create suitable bullets, you need to continue to point out a new technology tree.

Smokeless gunpowder!

Black powder burns slowly and has a low pressure, so that the bullets pop out of the chamber at a low speed.

In order to achieve sufficient range and effect, simple physics dictates that the mass of the bullet needs to be large, and the caliber of the bullet is naturally larger.

Therefore, in the era of black powder, rifle bullets of more than ten millimeters or even 20 millimeters abound.

In order to achieve better results, in the late black powder era, compressed black powder was charged to increase the chamber pressure, and it could also provide a speed close to that of smokeless powder.

When it comes to smokeless powder, the burning speed is faster, the pressure and temperature are higher, which brings faster speed, reduces the caliber and quality of ammunition, reduces the logistical burden, but also brings countless design changes.

Smokeless powder makes the caliber of the ammunition smaller, faster, and has a flatter trajectory.

A flatter trajectory means less impact from distance errors.

For example, the common trench warfare required to hit the exposed head at about 300m is likely to be a few tens of meters away from the zero point, resulting in a high or low impact.

A straighter trajectory can reduce the trajectory height error caused by distance and make it easier to hit the target.

“The preparation method of smokeless gunpowder in the TV drama Hanyang Zao is a bit exaggerated, but there are also places for reference.”

After posting the M1 rifle on the work table, Somo began to think carefully about how to mass-produce smokeless gunpowder.

If you don’t promote the development of the ammunition technology tree, no matter how awesome the guns are in the future, it will be no use without bullets.

“Nitrocellulose, the production process of fire cotton is not troublesome, but suitable cotton is a problem. After that, you only need to soak the fire cotton with ethanol and ether, and then dry it to get smokeless gunpowder.”

“Ethanol and ether are equally easy to prepare. Ethylene can be extracted, and ethylene can be used as a raw material for making ethanol. Ethylene can be hydrolyzed to obtain ethanol, and ethanol can be catalyzed to obtain ether.”

Finding a piece of paper, Somo recalled the few chemical knowledge as much as possible. The TV drama pieced together and completed the plausible idea of making smokeless gunpowder.

With a flash of light, after systematic identification, it was also determined that there was no problem with this design drawing, and the idea was correct.

“So, the last difficulty is cotton? If you want to make a suitable fire cotton, the quality of the cotton is very important!” In the

Hanyang TV series, Xu Jianyin once presided over the development of sulfuric acid in the Tianjin Manufacturing Bureau, which solved the problem at that time. Sulfuric acid is all dependent on imports.

It was Zhang Zhidong who saw his outstanding talent that he dug him to the Hanyang Steel and Pharmaceutical Factory to be responsible for the production of ammunition.

One of the main raw materials for making gunpowder is cotton. During his research, Xu Jianyin found that there are big differences between domestic cotton and foreign cotton.

Therefore, during the domestic trial production, the temperature, humidity, time, pressure, liquid concentration, etc. should also be changed. Perhaps this is the main reason for the failure of the Jiangnan Manufacturing Bureau.

In order to quickly find a production method suitable for China, Xu Jianyin “practiced with a pestle and a mortar by himself”.

It only took half a year to finally produce a sample of smokeless gunpowder.

After testing, the effect of the sample is completely comparable to that of imported smokeless powder.

This also shows from the side that as long as suitable cotton is found, suitable smokeless powder can be refined in a very short time.

“System, how many survival points does it take to create a pound of cotton used to make fire cotton!”

Without rushing to buy it in the market, he opened the system panel and clicked on the creation interface. Somo first recorded the system’s needs.

The price is not low, but not high either.

65 points of survival can be exchanged for a pound of cotton used to make fire cotton, 300 points can be exchanged for a kilo of prepared fire cotton, and 520 points can be exchanged for a kilo of developed smokeless gunpowder.

A bullet needs to be filled with about 2g of bullets, and one kilogram can be filled with 260 bullets. After conversion, it can be directly exchanged for gunpowder. The cost of a bullet is close to 2 survival points, which is a loss!   　”No, in the future, I will be loading bullets

. I must have a suitable production line. I will go directly to buy cotton, and I will practice it myself!”

The days are really busy, fortunately to have your support, love you!

(End of this chapter)