My Post-Apocalyptic Shelter Levels Up Infinitely!

"Global Wasteland: Unlimited Upgrade of Refuge (

The six-hour trading time arrived at three o'clock in the afternoon, and as Somo stepped out of the light door, the golden light behind him shattered in twenty or thirty seconds.

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

Except for the refuge, the mountain-like materials had been piled up at this time, and the peace in the depression was once again restored.

The iron blocks of 3200 units, divided into two layers, have been densely covered around the underground refuge, covering an area of ​​about three or four acres of land.

The same is true for the copper block, neatly built on the left side of the underground refuge, lying on the ground.

With the current storage area of ​​the underground refuge, these materials cannot be stored even if it is doubled several times. They can only be temporarily piled outside.

"It's great, in the depression, no one else can detect me. There are so many neighbors here, so I don't worry about being stolen if I store it outside."

Walking on top of the iron block, with Oreo's warning, Somo was not afraid of anyone coming to the refuge to steal resources.

Even if there are, these people's small and poor storage space alone can't take much away at once, so don't worry at all.

After using the storage space to move all the outer steel to the garage, he picked up the five-unit copper block, and Su Mo nervously went to the second floor to turn on the generator.

After several days of adventure running around, he even almost took his life and exchanged the supplies.

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

Seeing the laser manufacturing machine for small thermal weapons that had already started self-checking, Somo was agitated.

The steps of using laser machine tools are not difficult. After the magic modular technology is added, manufacturing has been simplified a lot.

You only need to select the weapon you need to make first, put the required materials in according to your needs, and pass the machine tool inspection, 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 it is a pity that a modular machine tool has not been acquired this time."

"But even if there are, these people don't necessarily sell them unless they are dying."

Shaking his head, putting away some greedy thoughts, seeing that the green light was on at the end of the self-inspection, Somo lightly tapped the M-1 rifle, and the material needed to be brushed out.

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

Ten kilowatts!

The machine tool also has its own battery module, and it needs to be charged with a certain amount of power first to ensure that it is higher than the manufacturing value before it can start.

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 at the bottom right, Somo is not in a hurry, and patiently sits in front of the machine and waits.

The creation of firearms involves some seemingly simple but very complicated specifications. For example, rifling is a very simple and very important part.

Rifling, also known as rifle. 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 warhead the ability to rotate, so that the warhead can maintain its predetermined direction after it is out of the barrel.

Although there are records of the use of rifling in the 15th century, it was not popularized until the 19th century due to the difficulty of the manufacturing process.

Without the relevant knowledge reserves, Somo can only hope that the machine tool will be strong and don't make mistakes!

After half an hour has passed, the charging is completed, and looking at the manufacturing button that pops up on the side of the machine tool, Sumo looks holy. He gently puts all the materials into the storage module of the machine which is only one square meter, and presses the manufacturing button with both hands to start. Making firearms for the first time!

Squeak! Squeak!

The harsh sound was accompanied by a slight jitter, and as the button was pressed, it began to burst from the machine tool from the inside out.

A terrifying high-pitched cutting sound not only frightened Somo, but even the large and small sparks on the second floor groaned in fright.

The upper laser probe began to slowly rotate under the power of the machine tool.

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

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

Then, a dazzling light burst out from the heat dissipation holes of the cover, and the reflected research room was unusually bright.

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

Gradually, watching the temperature get higher and higher, Sumo simply summoned the lion-man wind to dissipate heat from the big iron ball.

When this cycle is repeated for five minutes, the light begins to weaken.

puff!

With bursts of water erupting, the cover began to slowly fall, revealing the true content inside.

At this time, in the place where the finished product was ejected, there was already a freshly-baked gun, which was distinctive in shape and extremely aggressive.

Seeing the end of the gun from the tip of the gun, and carefully examining the body of the gun, Sumo calmed down at the moment of harvest.

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

Picking up the gun, Somo felt the weight first.

"Heavy is not heavy. The weight of an empty gun is about five catties. If you add bullets, it should be between six catties and six and a half catties."

Unloading the magazine, Suma looked at the capacity.

The bullet size of the magazine assembly is 5.56x45mm caliber. It uses a STANAG magazine similar to that on the earth, with a standard capacity of 40 rounds.

"If you don't consider the different pattern design of this name and the above, it is really a pirated m4a1"

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

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

The M193 bullet does not have a steel core, and the bullet is filled with soft lead, and the copper skin on the outside of the bullet is very thin, so the entire bullet becomes very soft.

After hitting the target, the warhead will quickly deform and break, and the bullet fragments will form a multi-hole penetrating injury (that is, a warhead punches several holes), causing serious bleeding.

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

The biggest problem facing all human beings in the wasteland is the preparation of ammunition.

Even if the current underground refuge is full of materials, if you want to create suitable bullets, you need to continue to point out a new technology tree...

Smokeless gunpowder!

The burning speed of black powder is slow and the pressure is so low that the speed of the bullets is low.

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

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

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

When the smokeless gunpowder burns faster, the pressure and temperature are higher, which brings a faster speed, also reduces the caliber and quality of the ammunition, reduces the logistics burden, but also brings countless design changes.

Smokeless gunpowder brings smaller caliber of ammunition, faster speed and straighter trajectory.

A flatter trajectory means that the impact of distance errors is smaller.

For example, a trench warfare usually requires about 300m to hit the exposed head. It is likely that a difference of tens of meters from the zero point will result in a high or low impact.

The flatter trajectory can reduce the trajectory height error caused by the distance, and it will be easier to hit the target.

"Although the method of preparing smokeless gunpowder in the TV series Hanyang Zou is a bit exaggerated, there are still places to refer to..."

After sending the M1 rifle to the work desk, Somo began to think carefully about how to manufacture smokeless gunpowder in batches.

If you don’t promote the development of the ammunition technology tree, no matter how awesome guns you will be in the future, it will be useless if you don’t have bullets.

"The production process of nitrocellulose and collodion is not troublesome, but the right cotton is a problem. You only need to soak the collodion with ethanol and ether and dry it to get smokeless gunpowder."

"Ethanol and ether are not difficult to prepare. Ethylene can be extracted from petroleum, and ethylene can be used as a raw material for ethanol. Ethylene can be hydrolyzed to obtain ethanol, and ethanol can be catalytically reacted to get ether."

Finding a piece of paper, Somo recalled the few chemistry knowledge as much as possible and put it together in the TV series, and completed the specious idea of ​​making smokeless gunpowder.

The light flashed, and after a systematic appraisal, it was confirmed that this design drawing was completely free of any problems and the thinking was correct.

"So, the last difficulty is cotton? To make the right collodion~www.readwn.com~The quality of cotton is very important!"

In the Hanyang TV series, Xu Jianyin once presided over the research and development of sulfuric acid in Tianjin Manufacturing Bureau, which solved the problem of relying on imports of sulfuric acid at that time.

It was Zhang Zhidong's fancy to his outstanding talents that he dug him to Hanyang Steel and Pharmaceutical Factory to be responsible for the production of ammunition.

One of the main raw materials for making gunpowder is cotton. In his research, Xu Jianyin found that there is a big difference 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 suitable production method for China, Xu Jianyin "handled the mortar and studied it by himself."

In only half a year, a sample of smokeless gunpowder was finally trial-produced.

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

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

"System, how many survival points are needed to create a pound of cotton used to make collodion!"

Not in a hurry to buy on the market, open the system panel and click on the creation interface. Somo first recorded the needs of the system.

The price is not low, but not high.

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

A bullet needs to be filled with about 2g of bullets. One catty can be filled with 260 bullets. After conversion, you can directly exchange for gunpowder. The cost of a bullet is close to 2 points of survival, which is too bad!

"No, I will list bullets in the future. I must have a suitable production line. I will go directly to buy cotton and I will practice it myself!"