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In addition to a yawai, Xu Hui also added a female assistant by her side. A thirty-four-year-old female doctor named Feng Yufei, majoring in MIT automation. Like Xu Hui, she is actually a researcher in China's weapons industry system, but she has never known each other before in different regional departments.

But the female doctor, the exterminator is too bad, and the temper is a little weird but it is inevitable - some time ago, when everyone tried their best to show their professional expertise and strive to do more for the collective, this female doctor was willing to squat in the kitchen and peel potatoes one by one, until one day she didn't know which tendon she touched, and suddenly rushed to Xu Hui and commented that his design was worthless. And he can actually say it on the point, Engineer Xu shuddered and cautiously asked about the master's profession, only to find that the two were peers.

However, Xu Hui is more professional, after all, his research direction is artillery and rockets. Feng Yufei's specialty is more focused on tanks and armored vehicles, but the female doctor never refuses to show weakness on professional issues, and often argues with Xu Hui, often leaving the assistants next to her at a loss.

In any case, it is always a good thing to expand the professional team, it seems that there are still a lot of talents hidden in their team, Pang Yu even considered when to re-do the demographic and pull out those professionals who are hidden in the people.

With the help of so many professionals, the finished shells that the weapons team finally came up with made everyone feel a little unworthy of the name, including the military team Jie Xi was also one of them.

"That's what you call clever improvements?"

Xie Xi was holding an ordinary-looking metal shelf in his hand, and he couldn't see anything special when he turned it over and over - that is, two "U" shaped steel bars were crisscrossed together to form a steel cage with a length of about 2 meters. According to Xu Hui's demonstration, the shells are put into this steel cage and then fed into the gun body through the mouth, and the four steel bars are exposed about 70 centimeters.

"Don't you see it yet?"

Xu Hui smiled and grabbed the exposed steel bar, and forcefully lifted the entire cage along with the cannonballs.

"We have a breech gun, there is no opening in the back, in case the shell can't go off, you can quickly take out the dud in this way."

"What kind of improvement is this, can't the muzzle of the gun be poured out directly?"

Pang Yu is a layman, a layman speaks layman's words, and then he was immediately ridiculed by Lao Ma:

"Brother, you think this is a second kick, it can't hit and it can still fall out - this cannon is not a solid iron ball, it is a flowering shell, and the trigger fuse used is at the top of the shell, and you really have to rush down and pour it out...... Boom, our artillery crew is all in the sky. ”

"In addition, there are several advantages to using this steel frame to load shells......

Lao Ma is worthy of being responsible for the actual operation, and he will demonstrate to everyone while talking:

"Because our shells do not have shells, the propellant and the body are separated, so if you follow the traditional breech gun firing procedure, it should be like this...... Special care should be taken to place the cartridge into the chamber and then the shell with the fuse removed...... The bottom device is then lit and the packet is fired. After that, clean the chamber and put it back in the pack...... This is repeated for at least two minutes. ”

"After using the steel frame, we can first put the propellant bag and shells in several shelves in advance, and when using, we only need to stuff the entire rack into the gun chamber to fire, and after the completion of the empty rack is taken out for the people next to us to load, and then directly put in another loaded rack...... It only takes ten seconds. ”

"Oh, this is the improvised monolithic shell, separating the reloading action...... But since this method is so simple and easy, why has no one used artillery in history? ”

Although Pang Yu is a layman, he firmly believes in one thing - only the technology handed down in history is a practical technology that can stand the test of time. Therefore, in practice, he tries to use those mature technologies that have been established in history as much as possible, and does not engage in any innovative inventions that look beautiful.

"Who said it hadn't been used, the Ming Dynasty artillery had already used the 'Zimu Kiln' technology, and this kind of steel frame was nothing more than a simple version of the 'Zi Yao'."

Ling Ning's familiarity with the history of the Ming Dynasty was not at all under the Pang Yu, and even more so in the military aspect.

"As for Europe, the caliber of artillery in the same period was relatively large, and the shells fired were mainly solid shells, but I didn't pay attention to whether there was this technology, but the overall shells were made by them first."

"This kind of steel frame also has disadvantages: it will be very troublesome when processing the warhead, and each shell must open four grooves on the bullet body according to the size of the steel bar, so as to ensure that the shell is embedded in the barrel to fill the barrel, otherwise it will affect the firing efficiency."

Feng Yufei always likes to find some faults, while Xu Hui is usually a person with a good temper, but when she encounters such a time, she refuses to give in, and she often blushes and has a thick neck:

"How can this be considered a disadvantage! Our metalworking capabilities are not bad and can fully meet the needs. Moreover, in this way, the missile body is supported by four guide rails, and it can still fly along the guide rails for a period of time after leaving the gun chamber, which can greatly increase the firing range. ”

Seeing that the two were about to argue again, Shen Yanei and the others in the weapons group who had suffered quickly changed the topic:

"The shell is good to say, in addition to ordinary shells, this cannon can also fire rockets, XCMG, you can introduce it to everyone......"

When it comes to Xu Hui's proudest work, the rocket master really immediately diverted his attention, and happily took out a thick and long iron pipe and showed it to everyone.

Compared with the short and fat mortar shells, this rocket is thin and long, that is, the warhead kill part is obviously thicker.

"The body of our oxygen cylinder cannon is too short, and when it fires ordinary grenades, it can only shoot at a high angle, and there is no dead angle, so it is good to use it to hit infantry, but it is not easy to use hard targets such as fortresses and large war ships. Therefore, we specially made a rocket to match the direct fire of the artillery, using a folding tail, after the gun body is fired, it will automatically open to ensure stability, and the ballistic trajectory can be completely guaranteed within the effective range. The warhead part has two charges, fragmentation and incendiary, which are used to deal with forts or ships, respectively. ”

Pang Yu and the others looked at this big guy curiously, and everyone cared about it.

"What is its effective range?"

Xie Xi is very concerned about this, usually the range of such a large rocket is not too low, according to his experience in the army, Xie Xi is estimated to be at least one or two thousand meters.

Unexpectedly, Xu Hui stretched out a slap to him helplessly:

"Five hundred meters, only five hundred meters."

"Huh? So close? ”

"There is no way, the propellant is really not easy to solve, I am now using a solid mixture of nitrocellulose and paraffin, carbon powder and other substances, the propulsion is large, but the durability is not good. In addition, the temperature is high when firing, and the barrel needs time to cool down, so it cannot be fired continuously. ”

What Pang Yu is concerned about is whether the material of the rocket -- the slender bomb with a line of simplified yellow characters printed on it "Shandong Laiyang Steel Pipe Factory" -- or the product of Xie Xi's hometown.

"It's too wasteful to use modern pipes carried on board as consumables for missile bodies, right? If you use it, it's gone. ”

And Xu Hui once again made a helpless gesture:

"Homemade materials are certainly not good for the combustion chamber, only modern pipes from the ship. And not just the tubes, including the tail, propellant, cover of the warhead section...... In fact, most parts can only be made of modern materials. So ......"

Xu Hui concluded:

"This rocket can't actually do much, at most about a dozen rounds."

"That's right......"

Pang Yu was silent, waste is a waste, but a rocket at a critical moment may play a big role, and it is better than nothing.

"Because it's all made of modern materials, it's not a hassle to make this kind of rocket. Palestinians can do the same in the desert, haha, even the steel pipes are the same, they are all products of Laiyang, Shandong......"

Dr. Feng Yufei next to him added with a smile, making Xu Hui half angry:

"How can you say that! We did so many tests to determine the formulation of the propellant, and the amount of the warhead......"

These two high-level intellectuals in their thirties began to raise the bar like children again, leaving Xie Xi and the others next to him stunned.

"How often do they make noise?"

Pang Yu asked Lao Ma and Lin Shenhe in disbelief, in his memory, Engineer Xu Hui was a very good-tempered person.

The other members of the weapon group couldn't help but smile and nodded again and again, and Lin Shenhe Yanai also said with great feeling:

"So, this mountain can't accommodate two tigers, unless it ......"

"Aren't they just a male and a female?"

The old horse next to him also praised a sentence, and smiled in the deep ya:

"Women and female doctors, completely different species."

Everyone around was very cooperative, and suddenly realized:

"Oh......"

Just kidding, for Pang Yuxie and others, there is one thing they must know - there is a limit to the number of rockets, are there ordinary shells? If ordinary mortar shells also have to be made of modern materials and cannot be produced in large quantities, then this gun is of little significance.

Fortunately, this time Xu Hui gave a reassuring answer:

"Our artillery shells can be produced indefinitely, the supply of explosives in the chemical group is sufficient, and the small blast furnace on the Huang Gong side can already provide iron for artillery shells."

-- Comrade Huang Jiancheng, a technician from the Shanghai Baoshan Iron and Steel Company, has been working on the blast furnace since he found the coal and iron ore. The pyrite produced by Lingao is not bad, but the coal is not very good, it is lignite with low calorific value, and it is okay to burn bricks and cement, and it is obviously not strong enough for iron and coking.

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