Chapter 163

Six hours of trading time, three o'clock and one in the afternoon, as Su Mo stepped out of the light door, the golden light behind him crashed in twenty or thirty seconds.

The light gradually turned into spots, fell to the ground, and merged into the snowdrift.

In addition to the shelter, the materials that had been piled up like mountains at this time, the calm in the depression was restored again in the past.

3200 units of iron blocks, divided into two layers, have been densely covered around the underground shelters, covering an area of about 34 mu.

The same is true for the copper block, which is neatly stacked on the left of the underground shelter and lying on the ground.

With the current storage area of underground shelters, it is impossible to store these materials even if they are doubled, so they can only be temporarily stacked outside.

"It's good. No one can detect me in the depression. There are so many neighbors here. I'm not afraid of being stolen if I store them outside."

Walking on the iron block, with Oreo's warning, sumo was not afraid of intentional people coming to the shelter to steal resources.

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

Using the storage space, move all the peripheral steel to the garage, pick up five units of copper blocks, and Su Mo nervously came to the second floor to turn on the generator.

After days of adventure, I even almost lost my life in exchange for supplies.

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

Looking at the small thermal weapon laser manufacturing machine tool that has begun to be connected to self-test, Su Mo was excited.

The use of laser machine tools is not difficult. After adding magical modular technology, manufacturing has been simplified a lot.

Just click the weapons to be made first, put the required materials in according to the needs, and then place them in a fool's way after passing the test of the machine tool, waiting quietly for the finished products to be released.

"Modular technology is really a good thing, but it's a pity that we didn't buy a modular machine tool this time."

"But even if there are, these people may not sell them unless they are dying."

Shook his head, put away some greedy ideas, looked at the end of the self-test, the green light had been on, Su Mo gently clicked on the M-1 rifle, and the material demand brush bounced out.

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

Ten degrees 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 set requirement for manufacturing failure or machine tool damage that may be caused by sudden power failure.

Seeing that the lower right has begun to charge quickly, Su Mo is not in a hurry and sits patiently in front of the machine tool and waits.

The manufacture of firearms involves some seemingly simple but actually complex specifications. For example, the manufacture of rifling is a very simple and important part.

Rifling, also known as rifling. Because its cross-section shape is similar to windmill, it is also called 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 still maintain the established direction after being unloaded.

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

Without relevant knowledge reserves, sumo can only hope that the machine tool awesome will not make mistakes!

Half an hour later, after charging, looking at the manufacturing button popping up on the side of the machine tool, sumo's face was sacred. Gently put all materials into the storage module of the machine tool, which currently has only one square meter. Press and hold the manufacturing button with both hands, and start making firearms for the first time!

Creak! Creak!

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

A thrilling high cutting sound not only scared Su Mo, but also scared the sparks on the second floor.

The laser probe above began to rotate slowly under the force of the machine tool.

Before Su Mo had 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 ball, leaving only a few cooling holes, completely covering the whole machine tool.

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

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

Gradually, watching the temperature getting higher and higher, sumo simply summoned the lion's wind and began to dissipate heat for the big iron ball.

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

Poof!

With bursts of moisture, the cover also began to fall slowly, revealing its true appearance.

At this time, in the place where the finished product is ejected, there has been an additional freshly baked gun, which is bright in shape and extremely offensive.

From the head of the gun to the tail, he looked at the gun carefully. At the moment of harvest, Su Mo calmed down instead.

When the green indicator light came on again, indicating that Su Mo could take the gun, the temperature of the M-1 rifle also fell to a stable temperature.

Picking up the gun, Su Mo first felt the weight.

"It's not heavy. The weight of the empty gun is about five Jin. With bullets, it should be between six Jin and six and a half Jin."

After unloading the magazine, Su Mo measured the capacity.

The bullet size of the cartridge assembly is 5.56x45 mm, and the STANAG cartridge, which is similar to that on earth, is used, with a standard capacity of 40 rounds.

"If you don't consider the pattern design with a different name from the above, it's really a pirated M4A1"

Touching the complex patterns on the gun, Su Mo was not sure about the power, so he could only try to continue to open the machine tool and manufacture ammunition.

The M-1 rifle uses m193 rifle ammunition, that is, the conventional 45mm caliber. This small caliber rifle ammunition has great 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 whole bullet becomes very soft.

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

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

At present, the biggest problem in front of all waste people is the preparation of ammunition.

Even if the current underground shelters are full of materials, it is necessary to continue to point out a new science and technology tree in order to produce suitable bullets

Smokeless powder!

The burning speed of black powder is slow and the pressure is low, so that the ejection speed of the gun is low.

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

Therefore, rifle bullets of more than 10 mm or even 20 mm can be found everywhere in the era of black powder.

In order to achieve better results, in the late black powder era, the chamber pressure was increased by filling compressed black powder, which could also provide a speed close to 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 logistics burden, but also brings countless design changes.

Smokeless powder makes the caliber of ammunition smaller, the speed faster, and the trajectory straighter.

A straighter trajectory means that the impact of distance error is smaller.

For example, a common trench battle requires about 300m to hit the exposed head, which is likely to be tens of meters away from the zero point, which will lead to high or low bullets.

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

"Although the preparation method of smokeless gunpowder in the TV series Hanyang zaoli is a little exaggerated, there are also places for reference."

Firing the M1 rifle on the desk, sumo began to think carefully about how to mass produce smokeless gunpowder.

Without promoting the development of ammunition technology tree, no matter how powerful guns are in the future, it is useless without bullets.

"The production process of nitrocellulose and collodion is not troublesome, but the proper cotton is a problem. Later, you only need to soak collodion in ethanol and ether and dry it to get smokeless powder."

"It is not difficult to prepare ethanol and ether. Ethylene can be extracted from oil, and ethylene can be used as raw material for ethanol. Ethanol can be obtained by hydrolysis of ethylene, and ether can be obtained by catalytic reaction of ethanol."

Finding a piece of paper, Su Mo recalled as much as possible the few chemical knowledge and the TV series, and completed the plausible idea of making smokeless powder.

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? The quality of cotton is very important if you want to make a suitable collodion!"

In the Hanyang TV series, Xu Jianyin once presided over the development of sulfuric acid in Tianjin manufacturing Bureau, which solved the problem that sulfuric acid was completely dependent on imports at that time.

Zhang Zhidong took a fancy to his outstanding talent, and then dug him into Hanyang Steel pharmaceutical factory to be responsible for the production of ammunition.

One of the main raw materials for making gunpowder is cotton. In the study, Xu Jianyin found that there are great differences between domestic cotton and foreign cotton.

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

In order to quickly find a production method suitable for China, Xu Jianyin "pestles the mortar with his hands and makes it by himself".

In only half a year, the smokeless powder sample was finally produced.

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

This also shows that as long as we find the right cotton, we can refine the right smokeless powder in a very short time.

"System, how many survival points does it need to produce a kilo of cotton used to make cotton!"

There was no hurry to buy in the market. Open the system panel and click on the creation interface. Su Mo first recorded the needs of the system.

The price is not low, but it is not high.

At 65 o'clock survival point, you can buy a kilo of cotton used to make firewool, at 300 o'clock, you can buy a kilo of made firewool, and at 520 o'clock, you can buy a kilo of developed smokeless powder.

A bullet needs to be filled with about 2G 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 too bad!

"No, I will train and load bullets in the future. I must have a suitable production line. I can buy cotton directly and practice myself!"