The Red Era, the Opening University Speech

Chapter 290 Teacher Qian Wushi's Feelings
Looking at the hesitant eyes of the crowd, Li Mu smiled and said:

"Since I dare to propose the development plan of 3+2 CNC milling machine, I am confident that I can realize it."

"You may not know this yet, but the Semiconductor Research Institute has now completed the research on CAD, and the subsequent CAM that can assist in mechanical manufacturing will also be successfully developed soon."

“CAD can greatly shorten the time spent on design drawings, while CAM has the potential to significantly improve the machining accuracy and efficiency of the machinery manufacturing industry. With their help, 3+2 has the foundation for success.”

After he finished speaking, he waited for responses from Wang Shicun and others.

After all, people still know very little about CAD and CAM.

If it were him, he would not dare to make this decision lightly.

Whether it is Emperor M or Big Brother, there are many opportunities for trial and error. If you fail, you can just accumulate experience and continue your research later.

But the cost of trial and error for Xia State is too high.

Even if there are no strict requirements above, all scientific researchers will try their best to make every bit of the country's resources be used to the best effect.

"I believe that Consultant Li is capable of leading us to develop a 3+2 CNC milling machine." Tang Yanjie was the first to speak amid the silence of everyone.

He doesn't know that much about CNC milling machines.

But he knew Li Mu, a man who could make Xia surpass Emperor M and Big Brother in many fields such as semiconductors and computers, would never talk big.

Wang Shicun did not hesitate any longer and agreed:
“If we can really have the help of both CAD and CAM software, then it is indeed possible to realize the 3+2 axis CNC milling machine that Consultant Li mentioned.”

“Even if there are problems with accuracy, they can be solved by calling in senior workers.”

"No, it won't be a big problem to meet the demand for the Xuanniao-1 helicopter. But if it succeeds, this kind of high-precision equipment will have an immeasurable impact on our country's aerospace industry!"

Even without considering Li Mu's ability.

After weighing the pros and cons, he also felt that this opportunity was rare.

"We also agree. We believe that Consultant Li can lead us to develop a 3+2-axis CNC machine tool!" Seeing that the two had expressed their opinions, the others also spoke up.

If it weren't for Li Mu, they wouldn't even be able to draw the design of the turboshaft engine.

Anyway, you will make money no matter how you research, so there is no need to be afraid.

Seeing this, Li Mu immediately said:

"Thank you for your trust. I will ask the Semiconductor Research Institute to bring the CAD over to install it."

“As for CAM software, it will take at most half a month to be successful.”

"Of course, before that, we will not be idle. I will lead everyone to sort out the research and design ideas of the 3+2 axis CNC milling machine."

He checked the progress of the three software development groups, CAM, CAT and CAE. Half a month was a conservative estimate. The progress would only get faster, not slower.

Although the data server has not been set up yet, it will be slower in processing data.

But the current computing power alone is enough to help everyone save a lot of effort in drawing the design drawings of 3+2-axis CNC milling machines.

……

After solving the problems with the turboshaft engine.

Next, Li Mu turned to explain the modified double-base propellant.

He said slowly:
"By introducing a multifunctional cross-linking agent, a cross-linking reaction occurs between macromolecules to form a network structure, thereby enhancing the mechanical properties of the propellant. This is the principle of cross-linking modification."

"Among the cross-linking agents we use, we can consider isocyanate, polyester, polyurethane, terminal hydroxyl polybutadiene, etc."

"In order to overcome the limitation of low energy of double-base propellant, we need to add non-propellant oxidizer and metal fuel..."

Different from turboshaft engines.

This time, Li Mu spent more time analyzing the modified double-base propellant clearly enough.

"Advisor Li." After he finished speaking, Zhu Yajie raised his hand and asked, "I would like to ask, what do you think the specific impulse level of double-base propellants can reach?"

Specific impulse is an important physical parameter to measure the efficiency of rocket or aircraft engines, defined as the impulse generated by a unit amount of propellant.

The higher this number is, the more thrust the propellant can generate and the more efficient the engine will be.

Simply put, the greater the thrust, the faster the D bullet is, the wider the range is, and the higher the maneuverability is.

"Theoretically, it should be able to reach between 2550~2646N·s/kg." Li Mu pondered for a moment and then gave a data.

Zhu Yajie was surprised and asked, "Is the improvement so great?"

Not only him, but other experts and professors who study solid fuels were also very surprised.

You should know that the specific impulse level of double-base propellant is only between 1650~2150N·s/kg.

Xia Guo’s current level hasn’t even reached the floor of 2150N·s/kg.

Even Emperor M and Big Brother are only close now.

"Solid propellants have many advantages over liquid propellants, but on the other hand, the research is also difficult and requires more effort," said Li Mu.

The better something is, the harder it is to study.

If he didn't have the information in the chat page, he might have spent three to five years without any results.

Zhu Yajie's face was still full of excitement, and he said happily: "No matter how difficult it is, as long as it's a good thing, we will get it out no matter what!"

……

After learning about the huge advantages of modified double-base propellant, everyone became more motivated.

The meeting lasted nearly an afternoon.

Only when everyone was starving did they stop and go to the canteen to fill their stomachs.

After dinner, Li Mu was not idle either. He followed Wang Shicun to the carbon fiber material preparation laboratory at the Institute of Aeronautics to continue his research.

But this time, he did not stand by and watch like he did in the previous times.

Now that you are familiar with the preparation process, it is time to get started.

Take polyacrylonitrile used as the main raw material, and then prepare auxiliary materials such as coal tar, natural fiber, etc.

The first step is spinning, where the material is dissolved, filtered, and then turned into continuous fibers through a spinning process.

This is followed by pre-oxidation, carbonization and surface treatment.

Each process was completed by Li Mu.

The smooth operation made the experts and professors, who were rubbing their eyes to relax between experiments, unable to look away after just one glance.

After the last step - graphitization is completed.

Li Mu also applied sizing material on the surface of the carbon fiber to protect the fiber.
Before I could even breathe a sigh of relief, a head popped out from the side.

Wang Shicun looked at the carbon fiber material in his hand and asked, "Is it done?"

Not only him, but all the experts and professors stopped what they were doing and looked over.

"It's hard to say. We need to test it." Li Mu smiled slightly and didn't speak too confidently.

Wang Shicun immediately said: "Give it to me, I will test it right away."

After saying that, he took the carbon fiber material from Li Mu's hand, and then took it to conduct tests on tensile strength, bending strength, and compressive strength.

……

It didn't take long for Wang Shicun to rush back with the results. He excitedly grabbed Li Mu's hand and laughed:
"It succeeded, and it was very successful. The tensile strength of the carbon fiber reached 3412MPa, the tensile elastic modulus was 2.3x10^5MPa, the elongation was 1.7%, and the density was 1.7g/cm, which met the standards we needed!"

"Advisor Li, you are truly amazing!"

"So many of us have spent so much time trying to solve this problem, and you've only done a few experiments? And you've already solved it!"

Hearing his words, everyone in the laboratory was so excited that they couldn't help but wave their fists.

As for the last sentence, no one cared at all - the gap was too big, and they themselves would not compare themselves with Li Mu.

"Success is a good thing, but I can't say that. Without everyone's help with experimental data, I wouldn't have been able to do it." Li Mu said with a smile.

Wang Shicun said:

"Okay, let's not talk about this. Anyway, the successful preparation of carbon fiber is definitely a good thing."

"Now all we need to solve is the problem of industrialization."

"Counselor Li, do you have any ideas?"

He didn't dwell on the question of merit for long.

It was something that everyone saw, and Li Mu couldn't shirk it even if he wanted to.

Li Mu nodded slightly and said:

"If we want to industrialize carbon fiber, we must first design several core equipment, including carbonization furnaces, carbon fiber preform production equipment, carbon fiber composite material production equipment, and carbon fiber product post-processing equipment."

"Among them, the prefabricated parts production equipment includes carbon fiber cloth rolling and burning machines, carbon fiber cloth cutting machines, carbon fiber cloth curing agents, etc.; the carbon fiber composite material production equipment includes prepreg cutting machines, autoclaves and hot pressing molding machines, etc."

"Only by making these devices can we build a complete carbon fiber production line."

Wang Shicun opened his mouth slightly, and after a long pause, he said, "How about we not rush into industrialization first, and just make sure the production volume can meet the needs of the Xuanniao-1 helicopter development."

No wonder he backed out at the last minute.

There are simply too many devices to complete in a short period of time.

Li Mu also knew this and said with a smile:

"Of course, there is really no need to build a perfect production line now."

"But we can still plan ahead and prepare for the large-scale production of carbon fiber in the future."

"With its superior performance, it will surely become the darling of high-tech equipment materials in the aerospace field in the future. The earlier you study it, the earlier you will profit."

Even the famous UH-60 Black Hawk helicopter had a total production volume of only more than 4500 units.

With Xia's current productivity, being able to produce 100 aircraft is already the maximum, and the demand for carbon fiber materials is not high.

"You have a long-term vision!" Wang Shicun rubbed his hands and asked carefully, "I guess you have some ideas about the machine design needed for the production line, right?"

He was really stupid. Others couldn't do it, but Li Mu might be able to do it!
However, he was still rational and did not do something as outrageous as asking for the design drawings.

The carbon fiber production line requires at least dozens of equipment. It has only been so long since the theoretical preparation plan was proposed until the successful preparation. It is impossible for anyone to complete it.

Li Mu smiled and said, "I have some ideas, but they are not perfect yet. After I ask someone to send the CAD software over, I will upload my ideas to it and we can study it together."

"Then we will wait for good news from you, Consultant Li." Wang Shicun said happily.

Afterwards, he continued to lead everyone in the laboratory to optimize the preparation of carbon fiber based on the experimental steps and data given by Li Mu.

A success is bound to have accidental factors, and the performance of the carbon fiber produced is also unstable.

They also need to find enough data to determine future carbon fiber production standards.

……

Li Mu spent three consecutive days in the research base.

He works as soon as he opens his eyes every day, running back and forth between Wang Shicun and Zhu Yajie.

After the CAD software was sent to him by Wu Xi from the Semiconductor Research Institute, he became even busier.

In addition to the research on the Xuanniao-1 helicopter and modified propellants, we will also introduce to everyone how to use CAD for auxiliary design.

After everyone got the hang of it, he took the opportunity to put up some preliminary design drawings of the equipment needed for carbon fiber production, such as carbonization furnaces, carbon fiber curing agents, etc.

Then organize people to discuss how to realize what is on the drawing.

……

This morning.

Li Mu woke up in the dormitory of the research base.

After washing up and exercising, he rarely went directly to the laboratory.

Because he has to go today.

As of today, he has been in the Aviation Academy for 4 days.

If I don't go back, I will be worried.

While eating breakfast in the cafeteria, Li Mu thought: "I have to solve the problem of dynamic balance of the first-stage axial flow centrifugal high-pressure compressor this morning. I can't leave it until next time."

Even if you have the design drawings, it does not mean that you can make a turboshaft engine directly.

There is still a long way to go before the Xuanniao-1 helicopter is launched.

Just as he was thinking deeply, two figures suddenly walked towards him from a distance.

Sensing someone approaching, he looked up.

"Teacher!" The moment he saw who was coming, Li Mu immediately put down his chopsticks and stood up.

Master Qian Wu said with a smile: "Why are you so excited? I just came to see you."

As he spoke, he sat down at the seat in front of him.

"No, no, I'm just a little surprised." Li Mu looked at Tang Yanjie standing beside him and quickly understood.

As the leading figures in Xia Country's aerospace field, it is normal for Master Qian Wu and Tang Yanjie to know each other.

Master Qian Wu joked:

"What are you surprised about? I should be surprised."

"I didn't expect that during my absence, you not only developed the Xuanniao-1 helicopter, but also developed a modified double-base propellant."

"I have always had the idea of ​​promoting solid fuel as a propellant for D-bombs, but I felt that the conditions were not yet ripe. I didn't expect you to be the first to do so. The younger generation always pushes the older generation forward!"

His eyes were full of emotion.

This student is called a student, but in many aspects he completely surpasses his teacher.

"This is all thanks to you. Without your teaching, I would not have the opportunity to get in touch with and study physics in depth." Li Mu said modestly.

I said this sincerely.

Master Qian Wu shook his head and said, "I just showed you a way. Your current achievements are entirely due to your personal talent and hard work."

"And many of your ideas have benefited me a lot."

"Alright, alright, you two, teacher and student, stop thanking each other. The teacher is great and the students are better than them. They are both pillars of the country. There is no need to be modest." Tang Yanjie interrupted them with a smile.

(End of this chapter)