Siheyuan: The Era of Struggle.

Chapter 118: Guan Dao Paddle (Subscribe)
"Okay, let's cooperate again." Under Yang Ning's instigation, Mr. Ye said.

"Your information is too sloppy. It only contains the approximate range of each element and the performance parameters of the final product. It seems that I, an old man, will not have a good New Year!"

Putting away the information in his hand, Mr. Ye looked at Yang Ning and said, "You have to contribute this time, otherwise if we rely on our research institute alone, I don't know how much resources will be wasted."

"Don't worry, I'm at the Data Processing Institute and I can't run away. If you need my help, just come to me and I will handle it as soon as possible." Yang Ning patted his chest and assured Mr. Ye.

After giving the information to Mr. Ye, Yang Ning returned to the office and began to design the Qinglong Yanyue, oh no, it was the Guandao paddle.

The design of the Guandao propeller is not difficult. It is a large side-slanted propeller blade. As long as some basic knowledge of marine fluid dynamics is used, the curvature and distribution of the blade can be designed.

Mechanics happens to be the foundation of mechanics, so Yang Ning completed the design of the Guandao paddle in just half a day.

When it comes to ship propellers, Yang Ning is not even an expert.

Although he completed the design through his superior computing ability, the final actual effect still needs to be verified by professionals.

Now Director Nie and Team Leader Qian have taken some people from the Chinese Academy of Sciences' research institutes to other places, busy with the manufacture of cyclotrons and reactors. It is now difficult for Yang Ning to find anyone to help.

He thought about it and it seemed that he could only ask Dean Guo. Although he didn't understand the technology, he knew someone who did! After all, he was the head of the Chinese Academy of Sciences, right?

So Yang Ning took his drawings and found Dean Guo.

"Why did you think of designing this?" Dean Guo looked at him puzzledly after hearing Yang Ning's request.

"A while ago, the research institute in Shanghai sent me their design drawings for calculation. It was just a sudden idea at that time. Taking advantage of this period of free time, I tried to design it. I just don't know if it can be used." Yang Ning said embarrassedly.

"Okay, I see you just can't sit still!" Dean Guo looked at Yang Ning unhappily and said.

"Go to the Beijing Institute of Technology and find Professor Chen who came from Chang'an for exchanges. He is an expert in this field."

"Thank you, President Guo. I'll leave now and won't disturb you!"

Yang Ning got the information he wanted and quickly said with a smile.

He is truly a community leader. He even knows all the information about the experts who came to Sijiu City for exchanges. No wonder the higher-ups appointed him as the dean.

Well, except for Xun Ge'er. Back then, Xun Ge'er scolded the entire literary world, and President Guo was no exception. He was scolded badly.

The reason why Xun Ge'er scolded Dean Guo back then was mainly because he married a Japanese wife at that time, and Xun Ge'er scolded him as a Japanese dog.

In fact, President Guo was also quite wronged. After the outbreak of the Anti-Japanese War, President Guo resolutely cut off all ties with Japan and returned to China to participate in the war despite the danger. Unfortunately, Xun Ge'er had passed away by then and could not see it.

Judging from what President Guo did, he was much better than most of the literati at that time.

It is because President Guo abandoned his Japanese wife and children after the outbreak of the Anti-Japanese War that people still talk about this in later generations.

If President Guo had not done this back then, would you have said it differently?
Anyway, they are just trying to discredit President Guo, otherwise how can they clear the names of others?

When Yang Ning found Professor Chen at Beijing Institute of Technology, he discovered that Professor Chen was having a pleasant conversation with a man in his thirties in the guesthouse where he was staying.

"Comrade, who are you?" Professor Chen is a middle-aged man in his forties with glasses and a thin face.

The two people who were talking stopped talking when they saw Yang Ning. Professor Chen stared at Yang Ning vigilantly and asked.

It's no wonder they do this. Although we have stood up for several years and social order has been very stable, there are still people who are unwilling to give up and want to cause sabotage, and there are many spies hiding in the dark.

Judging from their wary expressions, it was obvious that they were discussing our secret project.

Even though Yang Ning had knocked on the door before coming in, Professor Chen and the others were still wary of him.

"Hello, Professor Chen. I'm from the Chinese Academy of Sciences. I came to you this time because I have a design here. President Guo asked me to bring it to you for you to take a look."

Seeing this, Yang Ning quickly spoke up to avoid causing unnecessary misunderstandings.

"Recommended by President Guo?" Professor Chen looked at Yang Ning and still had some doubts when looking at Yang Ning's young face.

"This is my ID!" Yang Ning took out his ID and handed it over.

Professor Chen took it and took a look at it, then said with a smile: "Sorry, we were too nervous just now."

Then he returned Yang Ning's ID.

"This is Mr. Zhu from Beijing Institute of Technology." Professor Chen then pointed at another man and introduced him.

"Since Dean Guo asked you to come to me, I guess your design is about ships. Teacher Zhu is here too, and he is also an expert in this field. Let the two of us give you a reference."

"Hello, Teacher Zhu!" Yang Ning greeted the other man, then took out the drawing of the Guan Gong paddle he designed.

Professor Chen took the drawing and just glanced at it casually at first.

But as he watched, his expression gradually became serious.

"Xiao Zhu, come and take a look too." He couldn't even make up his mind about some things, so he simply called another man to look at it together. The two stood up, spread the drawings on the table, and started to discuss together.

"The curvature of this blade is quite interesting. This way, the propulsion speed will definitely be much faster."

"Large side-slanted blade design? Wait a minute, let me do the math..."

Soon the two of them started calculating over the blueprint, leaving Yang Ning, a grown man, aside.

Yang Ning didn't care about this. He had seen this kind of situation many times in the Chinese Academy of Sciences.

If anyone dares to disturb them at this time, they might get scolded.

At this time, Yang Ning could only silently act as a waiter. After refilling their cups with water, he sat aside and watched them silently.

"No, although the curvature and blades conform to the flow of water, if we use large three-blade propellers, it will waste some of the propeller's thrust."

"Xiao Zhu, calculate it and see if it's correct?" Professor Chen suddenly said, pointing at the drawing.

"Wait, let me calculate." Teacher Zhu glanced at the place where Professor Chen pointed, then started to calculate.

"Although the large three-blade design wastes some thrust and increases the vibration of the hull, it can also reduce the requirements for materials and greatly increase the life of the propeller. Otherwise, if a four-blade propeller is used, the cavitation effect will be a problem that needs to be overcome." After calculating for a while, Teacher Zhu said to Professor Chen.

Pure copper is commonly used in the manufacture of propellers nowadays. We all know that pure copper is not strong enough, but we don’t have any other alternative materials, right?

"The large three-leaf design is certainly fine for civilian use, but if it is used on warships and submarines, it is definitely not as good as the four-leaf design," Professor Chen said firmly.

“But with the four-leaf design, whether our materials can pass the test is still a question.”

Teacher Zhu put down his pen and said helplessly.

After World War II, propellers in Western countries have completely abandoned pure copper materials and instead adopted more advanced nickel-aluminum-bronze alloys.

The only thing that Big Brother supports us with is small ship technology, and the propellers of these ships all use outdated pure copper technology.

If there were no material problems, Yang Ning's design would have gone straight to the seven-blade propeller. After all, the technical prerequisites for the seven-blade propeller are the large side-inclined Guan Gong propeller and nickel-aluminum-bronze cold forging technology.

The adoption of a three-blade propeller design is also a helpless choice due to our current industrial level.

“If all else fails, I can only use the Guandao paddle technology to exchange for nickel-aluminum-bronze alloy technology from Big Brother. I just don’t know if Big Brother is willing to exchange?” Yang Ning thought to himself.

Although nickel-aluminum-bronze alloy was invented by John Bull, given the importance Big Brother attached to John Bull, Yang Ning did not believe that Big Brother did not have this technology.

However, nickel-aluminum-bronze propellers are most suitable for use on large ships, and I guess Big Brother won’t give them to us so easily.

"Do we have to wait until Mr. Ye successfully develops the HY-80 and then use this technology to exchange?"

Thinking of this, Yang Ning felt that we had suffered a great loss. After all, HY-80 can not only be used on the submarine hull, but also on the deck and rocket engine.

“If it really doesn’t work, let’s leave it to our higher-ups to consider!” This was the only plan Yang Ning had.

Anyway, the above considerations are definitely more comprehensive than your own wild guesses.

"I'm sorry! Comrade Yang Ning, your design is so ingenious that we were both mesmerized by it."

At this time, the two discovered that there was another one here, and Professor Chen said to Yang Ning embarrassedly.

"It doesn't matter. You two are doing this for my sake. I can't thank you enough." Yang Ning said with a smile.

"Can this design be used?" Yang Ning asked anxiously as he looked at the two of them.

"Of course you can, it's a pity that our materials are not up to standard, otherwise we could go further. But it's already much better than our current design." Professor Chen looked at Yang Ning and said with a smile.

Originally, Professor Chen was thinking about whether he could recruit Yang Ning into his research group, but when he remembered that Yang Ning was already a researcher at the Chinese Academy of Sciences, he gave up this plan.

Who would be willing to follow him to Chang'an to eat mutton soup steamed buns when they can eat roast duck in Beijing?

After getting a positive answer, Yang Ning thanked the two again, then left happily with the drawings.

"Comrade Zhao Yang, please send this blueprint to the Shanghai Institute and let them see if it can be used?"

As soon as Yang Ning returned to the office, he quickly handed the drawings to Zhao Yang and asked him to send them out as soon as possible.

Not only drawings, but also the performance parameters of HY-80.

Although HY-80 has not been developed yet, we should at least tell them in advance to avoid them changing the design later.

　I will post the remaining chapter tonight, it’s still 3,000 words, please support me!

　　
　
(End of this chapter)