doomsday survival

Chapter 361 Overall Improvement
This is a gray matte steel crossbow, except for the arrow path and handle of the crossbow body, all steel materials are used.

The crossbow is seventy centimeters long, fifty centimeters wide, and weighs about five catties.

Shi Jian roughly estimated that it would take 25 kilograms of force to pull the crossbow.However, because there are pedals on the front, it can also be used by people with weak strength.

In fact, this crossbow is quite different from the one made by Chen Qiong, in that it is one size bigger in size alone.

After all, Chen Qiong was unable to realize many things due to the limitation of raw materials at that time, and it was relatively crude.

"Let's go, let's go experiment." Shi Jian said happily holding a crossbow.

A group of people came to a spacious open space outside, where a row of targets had already been set up, and every crossbow produced was tested here.

Shi Jian stood about 30 meters away from the target, skillfully pulled the crossbow strings, placed the crossbow arrows, leveled the crossbow, and aimed at the red heart on the target through Wangshan.

These days, they have tried more than a dozen crossbows, and each time there are big or small problems.

Yang Chengcheng continued to revise the design according to the results of the experiment, and now it is the most ideal design plan in his opinion.

"Success." Yang Cheng clenched his fists and prayed secretly.

There was a sound of "stretch", and a sharp arrow was shot towards the target at high speed.

Yang Cheng's heart tightened, and he couldn't help shouting: "Zhong!"

Accompanied by his shout, the crossbow bolt hit the red heart, and its powerful force allowed it to pierce through the three-centimeter-thick wooden board, leaving only half of the arrow body outside.

"Great!" Yang Cheng clenched his fists and cheered, his appearance could even be described as crazy.

It's no wonder Yang Cheng is so excited. Shi Jian's minimum standard is to be able to shoot accurately from 30 meters away, and at the same time be able to penetrate wooden boards.

The reason for this requirement is that Shi Jian believes that this is a safe distance. Only in this way can the safety of the shooter be guaranteed and zombies can be shot.

"Not bad." Shi Jian patted the steel crossbow approvingly.

At least for now, this has been able to meet his requirements.

Shi Jian tried to shoot two arrows again, both of which were able to hit the red heart accurately, so he moved back ten meters and started the test shooting 40 meters away.

This time, the crossbow could still hit accurately, but its power was reduced, only penetrating two-fifths of the arrow body.

Shi Jian tested it a few more times, and finally determined the range of the crossbow.

The maximum range is 70 meters, the accurate range is 55 meters, and the effective range for killing zombies is 50 meters.

This figure has far exceeded Shi Jian's expectations.

50 meters, the zombies can shoot two arrows in a row within the time they come, and if you add the arrow that was put in the arrow path in advance, you can shoot three arrows.

Such an attack speed is no longer dangerous when facing zombies alone.If the user is calm enough and retreats while shooting, he can even face three zombies alone.

"That's right, I'll use this, and mass production will begin immediately." Shi Jian directly made a decision.

It has to be said that the military is the forerunner of all technologies, and this small crossbow has raised the smelting level of the Chang'an tribe by more than one level.

The crossbow blades were no longer made of the spring steel that had been added with phosphorus. In fact, it was not spring steel at all. Shi Jian had misremembered this.

When Shi Jian found that the elasticity of phosphorus-added steel was not as good as expected, he also asked Gao Shanhe.

But Gao Shanhe is just a worker in a steel factory, and he doesn't know the content of elements in these steels.

In desperation, Shi Jian had no choice but to check the information on his mobile phone, but there was no such content in it, so he was going to make a mistake.

At this time, Fengkuang found various steel materials from the computer hard disk of the steelmaking plant, and finally solved this problem.

For this reason, Feng Kuang also laughed at Shi Jian, saying that he was not good at studies.

"It can't be my fault. I'm a mechanical design major, so I don't know much about metallurgy, and I've almost forgotten what I learned at the beginning." Shi Jian defended weakly.

These materials include not only the composition of steel elements, but also the detailed smelting process, coupled with Gao Shanhe's experience and technology, within only one day, the spring steel that meets the requirements is smelted.

The crossbow pieces are no longer cast, but changed to hot rolling and machine tool processing. The performance of the crossbow pieces made in this way is far better than that of casting.

The crossbow string is made of steel wire by wire drawing process. This is a technology that has been mastered before, and there is not much change.

If it didn't take a long time to smelt molten steel, Shi Jian and Gao Shanhe really didn't have the time to figure out these crafts.

These days, they are almost running around, using the smelting gap to repair those equipment, so busy that they hit the back of their heads, and there is almost no time to rest.

Shi Jian couldn't bear to let Gao Shanhe, an ancient man, be as busy as himself, and advised him several times to go back to rest, but he never agreed.

In the end Gao Shanhe was cornered by Shi Jian, shook his head, and said resolutely: "No, Mr. Shi, although you understand a little, but you are definitely not as familiar with me, so I can't rest."

"Old Gao, you are too old to compare with a young man like me." Shi Jian persuaded again.

"Mr. Shi, I don't have much education, but I know," Gao Shanhe said seriously, "There is no such thing as eating and drinking for nothing. Since I am supported by the Chang'an tribe now, I can't let the Chang'an tribe support me for free!"

Listening to Gao Shanhe's loud but unpretentious words, Shi Jian was moved in his heart, and at the same time felt a little guilty, and said, "Old Gao, I didn't mean that."

"I know Mr. Shi doesn't mean that," Gao Shanhe lowered his voice, and said slowly, "But Mr. Shi, I don't have a few years to live. I can also see your ambition. While I can do it now, Let me pass on this craft."

Shi Jian bit his lip, nodded silently, and then said to Wang Gang and others at the side: "You all heard it, you must study quickly, you can give Mr. Gao an extra day's rest if you meet each other a day earlier, you all know Yet?"

Wang Gang and the others immediately stood at attention and said, "Understood! We must learn this quickly."

It was the concerted efforts of these people who forgot to eat and sleep that made everything go so smoothly. In three days, they actually mastered these crafts.

These heat treatment processes are actually extremely important to the future development of the Chang'an tribe.

Not to mention far away, the reinforced concrete used for the defensive fence that is about to start requires a wire drawing process to produce steel bars.

Shi Jian's thoughts were all devoted to the steel crossbow, until today he finally produced the first prototype crossbow, and he can finally shift the focus of his work to other places.

The first thing he did was to find Feng Chen and ask him about the progress of the project.

Under Feng Chen's leadership, in the past ten days, all the foundations have been excavated, and Zhao Tiefeng's brick kiln has also started firing red bricks.

While Yang Cheng was researching and improving the steel crossbow all day, Zhang Weiqiang, who didn't need help, began to produce a large number of wooden boards, preparing to be used as a frame for pouring concrete.

Now just waiting for everything to be in place, the construction of the fence will start immediately, and the industrial park will have a solid defense system by then.

After listening to Feng Chen's report, Shi Jian was very pleased. Now the Chang'an tribe has grown up. Even without his personal participation, other people can do a good job.

"That's right, how long do you think it will take to start building the walls?" Shi Jian asked.

Feng Chen lowered his head and made some calculations, and said, "It will take two days for me to finish digging the foundation, and then I can pour concrete first."

"Three days," Shi Jian tapped the table twice with his fingers lightly, and then asked, "Well, the autumn harvest at the cottage is almost over, right?"

"It will take a week to finish over there." Feng Chen replied.In addition to leading people to dig the foundation, he is also responsible for liaising with the cottage, so he can be regarded as a veritable chief executive.

"When the work over there is finished, we'll move them here, so that there will be plenty of manpower to build the walls, and we should be able to finish the work before it freezes." Shi Jian said happily.

"President Shi, there is one more thing." Feng Chen said suddenly.

"What's the matter, you said."

"That radio station started playing Sanskrit music again." Feng Chen said.

Shi Jian frowned slightly, and asked, "It's playing again?"

"Yes."

"This is really strange." Shi Jian said puzzled.

The Sanskrit sound frequency that was discovered before was completely silent after playing the mourning music for half a month.

Shi Jian asked Li Yeyue and Liu Hong to try to establish contact with each other every day, but there was no reply. He even thought it was just everyone's fantasy.

Unexpectedly, after being silent for such a long time, the mantra started to play again, and he didn't know what the other party meant.

Shi Jian who couldn't figure it out simply stopped thinking about it, and just told Feng Chen: "You tell them to keep trying to contact each other, and we don't care about the rest."

Feng Chen agreed, turned around and left.

Shi Jian thought about the frequency again, but still had no idea, so he put it aside again and began to sort out his recent work.

The most urgent task at present is to build the fence and produce steel crossbows. One is a defensive offensive and the other is an offensive method. Both are indispensable.

The biggest contradiction right now is that they all need steel, but fortunately, the steel bars needed for concrete are not too much, and it doesn't take long for the steelmaking furnace to let go of the production of steel crossbows.

In addition, it is the autumn harvest in the cottage. With simple agricultural machinery, the speed of autumn harvest has increased a lot, and adults and children no longer go together like before.

The last is the road leading to the lime kiln. As long as it is opened, no matter which direction zombies come, they can retreat calmly, and the Chang'an tribe will be invincible.

The more Shi Jian thought about it, the brighter the future became, and he became more confident in building this pure human land on the mainland.

At this moment, there was a knock on the door, and Li Yuemai walked in.

"Boss Shi, I have something to report to you." Li Yuemai said directly.

Shi Jian listened to Li Yuemai's report without saying a word, and all the good mood just now was broken.

"I know about this, you continue to pay attention, and come to me immediately if you have anything to do." Shi Jian said to Li Yuemai seriously.

　There are only three monthly tickets left, and the 28th is the last day. Brothers who have tickets, please support me, thank you Huyue!

　　
　
(End of this chapter)