In fact, what Zhang Yun wants now is not just production, but the most important thing is to improve the power and range of the musket.

If you want to increase your power and range, you have to talk about rifling!

The rifle is also known as the double line. Because its cross-sectional shape is similar to a windmill, it is also known as the windmill line.

The rifle can be said to be the soul of the barrel. The function of the rifle is to give the bullet the ability to rotate so that the bullet can still maintain a certain direction after it is out of the bore.

Although there was a record of using rifle in the 15th century, it was not popular until the 19th century due to the difficulties in the manufacturing process.

In the current Song Dynasty, Zhang Yun was really blinded. If the musket had no rifle, it would have no meaning to get it out.

In later generations, Zhang Yun was a complete military fan. Although she paid some attention to firearms, she only understood it slightly.

Speaking of this rifle, Zhang Yun had a method in his mind, but he didn't know whether the Mohist people could create suitable tools.

There are many ways to pull the rifle. The earliest scraper method and hook and knife bending method should not be a problem, but this method is too inefficient.

Only the combination of ring-shaped knife-brushing method is more in line with Zhang Yun's idea.

If Zhang Yun remembers it correctly, this combination ring-shaped broach can cut out all the rifles through the gun chamber, shortening working time and improving yield and quality.

The contemplator returned to his study, and Zhang Yun picked up his pen and started writing and painting.

The so-called combined ring cutting method is to fix dozens of cemented carbide steel rings on a pull rod.

The distances between each steel ring are equally equidistant scrapers with the same number of rifles are processed on each steel ring.

Each cutter can be connected to the cutter on the next ring through its wrap angle, and can be considered a screw thread from the beginning to the end.

The projection of the blade on each ring is slightly greater than the previous ring, forming a series of cutters, with the grooves being opened with a stable width, depth and spacing.

After drawing, writing, writing and painting, Zhang Yun tinkered with it for nearly an hour before he found the drawings that satisfies himself.

When Zhang Yun found Mo Youcai, he felt that he still couldn't rest assured, so he simply returned to the R&D workshop, and he had to teach the opportunity in person.

"Little Langjun, although this thing is complicated, it doesn't seem particularly difficult to do!" Mo San listened to Zhang Yun talking a lot, and then gave his own answer.

Since Mo San said this, Zhang Yun was no longer easy to say anything. In short, the rifled musket was what he wanted.

However, after rifling, loading the front musket became a problem.

Due to the rifle protrusion in the barrel, the bullet is inconvenient to load, which makes the firing rate and firing efficiency of the rifled musket extremely low.

In order to solve this problem, the shooters had to carry a mallet with them, and the loading rate was imagined.

On the battlefield, every second is precious. Zhang Yun does not want his soldiers to die due to reload when facing the Jin army or Mongolian cavalry.

Therefore, Zhang Yun simply drew out the Minnie bullet in his impression.

The diameter of the Minnie bullet is slightly smaller than the diameter of the gun chamber, so it is very convenient to load.

There is a conical cavity at the bottom of the warhead, and a wood plug blocks the bottom of the hole. When fired, the gas presses the wood plug into the cavity, forcing the bullet to expand and close to the rifle.

The gap between the bullet and the gun chamber is closed so that the gas cannot be leaked, and the bullet can rotate at high speed under the pressure of the rifle.

This technological innovation of the French in later generations solved the difficulty of loading the front-loading rifled rifles, making the rifle surpassed the artillery and became the decisive weapon on the battlefield at that time.

With rifle, when firing a bullet, it is forced to fly by the threaded lines engraved in the barrel of the gun, so that its precise direction and long-term stability in high-speed movement make long-distance sniping possible.

Of course, if you want to truly achieve sniping, it is not possible to not have a scope, but Zhang Yun knows nothing about it.

After throwing the drawings that Mini had been projected to Mo Youcai, Zhang Yun became the manager. It was not that he had enough confidence in the people of the Mo family, but that he could not help him.

The autumn was clear and the weather was clear, and Mongolia in the north had begun to exert its strength, but the border between the Song and Jin Dynasties seemed peaceful. As the war ended, the number of merchants traveling from south to north gradually began to increase.

After the auction, Zhangjiazhuang was busy. Except for Zhang Yun, no one was idle. Even Zhao Min checked all accounts all day long.

Even in the court, there was peace. The pro-war faction and the pro-peace faction tacitly did not attack each other, which also made Zhao Kuo have a lot of time to start creating people.

It’s a pity that no one can conceive a dragon seed, no one can conceive of a dragon seed!

Gradually, Zhao Kuo seemed to be completely in despair, but instead began to study Taoism.

Since returning to Lin'an, Zhang Yun has been asking around about the whereabouts of Ziqiu Chuji in Changchun, but this guy is like evaporating from the world.

However, in recent days, news has been heard in the palace that Taoist Master Changchunzi has been preaching to Zhao Kuo all day long, and it has been quite effective!

"Damn!" Zhang Yun, who received the news, swears and says nothing about it.

Compete with Zhao Kuo, haha, unless you don’t want to get along, Zhang Yun is not that stupid!

At noon that day, Zhang Yun, who was planning to go to the research workshop, suddenly received a report from his servant that a Dajin caravan from the north came to the gate of the village to ask for a visit.

"Fu Chayuan's anger?" Zhang Yun was already a little stunned after hearing the visitor's words.

It seems that I have probably captured such a person!

However, it seemed that before evacuating Sizhou, the guy used his war horse to redeem himself.

I raised him for several months with delicious food and drink, and got more than a hundred high-quality war horses. No matter how much I count this transaction, I will not lose money.

Zhang Yun was still very careful when doing business with the Jin people. If one is not good, the literati and officials in the court would spit himself to death.

"We are here just to exchange for fine wine!" The businessman in charge said respectfully to Zhang Yun, without a trace of arrogance.

"Is Fu Chayuan angry?" Zhang Yun asked tentatively.

"After my father was returned, he was removed from his official position. He kept talking about the warm hospitality of the governor and the fragrant wine all day long!"

Zhang Yun blushed when she said this!

"This matter is of great importance. I cannot make decisions privately, but are you really willing to trade war horses for it?" After a long time of struggling, Zhang Yun still felt that she could not make decisions privately.

Although the war horse is a good thing, it is a strategic resource after all. I don’t know what is wrong with Fu Chayuannu, so he dares to trade privately.

"This is the first time my father has been doing business with the governor!" This is true. At that time, Fu Chayuan redeemed himself with a war horse.

Think about the severe cold in the north, and the spirits like Xianrenzui will definitely be very popular!

"This matter is very important, and the government needs to be the leader!" After refusing, Zhang Yun issued an order to expel guests.

Now that I have just entered the dormant period, I can't get involved in such things or be subtle. I wrote a letter, and Mo Youcai hurriedly thought about the Yi Palace and left.

An hour later, Zhao Kuolong, who received the news, was very happy. The price of a jar of immortals and a war horse was set.

War horses are a rare thing in the Song Dynasty, but Immortals are not drunk!

Although there are still huge benefits here, such results are already what each person needs.

So, both parties who had been beaten to death some time ago started a business in private.

As long as there are interests, there is really no eternal enemy!
Chapter completed!