The Red Era, the Opening University Speech

Chapter 269 UH-60 Black Hawk Helicopter Engine
"The fuselage of the Xuanniao-1 helicopter adopts an all-metal structure, mainly supported by aluminum alloy, which has high strength and corrosion resistance. It also adopts a double-mast beam structure, which can provide good stability and load-bearing capacity."

"The rotor and tail rotor use four pieces of composite material-supported rotors and four pieces of carbon fiber composite material-supported tail rotors, which reduces weight while improving the efficiency and durability of the rotors."

"The avionics and communication systems will be based on our country's powerful computer technology to ensure accurate navigation and flight in complex weather conditions, and will not lose contact with ground forces."

……

He described the situation of the UH-60 Black Hawk helicopter in as much detail as possible.

After saying this, he put down the phone and looked at Tang Yanjie, waiting for his next move.

The latter quickly continued: "Advisor Li's introduction is very clear and has answered some of my confusions. I believe everyone has gained a lot."

As soon as he finished speaking, there was a burst of sparse applause from below.

Seeing this, Tang Yanjie didn't waste any words and said, "It seems that everyone still has a lot of questions, so let's start asking questions directly."

As soon as he finished speaking, a group of experts and professors raised their hands.

This is not surprising, it is normal to have problems.

It can be said that Xiaguo's helicopter research lags behind the world by at least 10 years, and the UH-60 Black Hawk helicopter is a product of the 70s. The gap between the two is a full years.

This huge gap is not only in basic conditions, but also in talent reserves, technology accumulation and other aspects.

Li Mu signaled an old expert to raise his hand and ask a question.

The latter nodded politely, but his tone was not polite, and said:
"Advisor Li, your outstanding design has won the praise of all the researchers in our aeronautical institute. However, many of the technologies you mentioned are difficult for us to achieve now, such as the aluminum alloy structure of the entire fuselage, and the cost of the materials is very high."

"Then there is the rotor and tail rotor structure. There are four rotors and four tail rotors, which are unprecedented in the world. Although it is theoretically feasible, I don't think it can be successfully developed in a short time."

"There are too many technical difficulties that need to be overcome! Whether it is the time cost or the resource cost investment, it will far outweigh the benefits that will be brought to our country after successful research and development!"

"The last part is the most critical part, the engine. If everything is made according to your requirements, I can hardly imagine how powerful the engine would be to drive it to fly and meet the design standards!"

He summarized all the current problems with the Xuanniao-1 helicopter, and after he finished speaking, everyone below couldn't help but nod in agreement.

Xuanniao-1 is indeed a very powerful design, but the problem is also obvious: they cannot build it.

Li Mu hesitated for a moment before saying, "I think these problems can all be solved. Let's take the most critical engine problem you just mentioned as an example."

"If there is no usable engine, then design a new one that can be used!"

"Oh, I wonder what kind of engine you are planning to research, Consultant Li? A gas turbine engine?" the old expert continued to ask.

In the aerospace field, there are three main types of engines: piston aircraft engines, gas turbine engines and ramjet engines.

The latest model of Mi-4A|V helicopter from Big Brother uses a gas turbine engine.

The best engine on the M side is General Electric's T408 turboshaft engine, which is also considered to be the most advanced helicopter engine currently.

Compared with turbines, turboshaft engines are more suitable engines for helicopters.

Li Mu looked through the information in his mind. Without the support of core technology, he was not sure whether he could convince everyone.

After a pause, he continued:
"From my personal point of view, I don't think it's the right choice to continue working on turbine engines, at least in the helicopter field."

"There are significant differences in the way and application of thrust generation between the two. The main thrust generation method of the turboshaft engine is the exhaust gas from the turbine through the tail nozzle."

"But this thrust is relatively small, accounting for only about one-tenth of the total power of the engine. The nozzle design is flexible and can be facing up, down or to the sides, which is beneficial to the overall design of the helicopter."

……

He listed the benefits of turboshaft engines one by one.

The two engines just have different directions and are not good or bad. But at least on helicopters, the turboshaft is more suitable. Whether it is the efficient conversion of the energy generated by the gas generator into rotational force or the ability to provide stable power output in structural design, these are its huge advantages.

After listening to this, the experts and professors below looked at each other in surprise.

Finally, the old expert spoke up with a little embarrassment, "It's not that we don't want to develop a turboshaft engine, it's that we can't develop one. Even if we want to copy it, there's no chance!"

Currently, only M-Emperor has turboshaft engines, but the two sides are now in a hostile relationship and it is impossible to get a reference.

"There's no need to copy it, we can just do it ourselves." Li Mu stood up, and with the corner of his eyes he saw a small blackboard in the corner of the stage. He walked over and picked it up, then wrote as he spoke:
"The basic principle of a turboshaft engine is to compress gas, inject fuel and ignite it to generate high-temperature gas to obtain thrust. Its structure is mainly composed of a compressor, a combustion chamber and a turbine."

"Its technical difficulties mainly include eight aspects: the first is the high power density requirement, the second is the aerodynamic challenge, and the third is the rotor dynamics problem..."

"But these problems are not unsolvable. Take the high power density problem as an example. It can be solved by optimizing electromagnetic design and selecting high-performance magnetic materials..."

While he was talking, Li Mu had already filled up the small blackboard.

But this only solves the first problem, there are nine more to come.

He rolled up his sleeves and wanted to wipe it clean and continue writing.

At this time, several loud shouts rang out: "Don't wipe it!"

As the voice fell, several professors over fifty years old rushed to the stage nimbly and "grabbed" the small blackboard from his hands.

Wang Shicun, who was sitting on the stage, couldn't help but shout out as well. Seeing that the blackboard was protected, he first breathed a sigh of relief, and then said, "Advisor Li, you are too anxious. We haven't understood everything yet, and you wiped it off. How can this be possible!"

"This is my negligence." Li Mu looked at the nervous expressions of the experts and professors below, was stunned for a moment, and made up an excuse.

I almost forgot, this is the Institute of Aeronautics. Unlike the Semiconductor Research Institute, everyone has the habit of taking notes and remembers them very quickly.

Tang Yanjie, who was standing by, looked at the experts from the Academy of Aeronautics, all gathered around the contents on the blackboard, ignoring the enthusiastic discussions around them, and couldn't help but sigh:
"Last time you told me that there were problems with the engine, but I didn't expect that you, Consultant Li, had already found a solution in just two days. You are indeed a genius who has won the first prize of the country's highest science and technology award!"

"These are just some theoretical ideas. It's hard to say whether they will work or not." Li Mu explained.

He is indeed lacking core information now.

However, he still had quite a bit of general information on the General Electric T60-GE-700 turboshaft engine used in the UH-700 Black Hawk helicopter engine.

Tang Yanjie saw Li Mu's expression and thought he was being modest, so he said immediately:
“Whether it’s a theoretical idea or not, you can speak it out and discuss it with everyone.”

"Xiao Wu, go and clean up a room. Consultant Li will stay at our research base today."

"And don't forget to tell the canteen to prepare some hearty dishes to reward our reinforcements."

His attitude clearly showed that he wanted to keep Li Mu.

Other experts and professors also warmly invited Li Mu to stay and continue the discussion.

Nearly three hours had passed since the meeting began, and he had only mentioned one of the ten key technical difficulties he had proposed. If they didn't listen to all ten today, they would probably not be able to sleep even in bed.

Looking at everyone's expressions, Li Mu knew that he couldn't leave until he finished his lecture today, so after everyone had written down what was on the blackboard, he continued to talk about the remaining technical difficulties, explaining them one by one.

Of course, it is not very likely to make a turboshaft engine based on these theories.

Materials, technology, design... and many other difficult problems are waiting for them.

However, this was enough to surprise the researchers from the Institute of Aeronautics who attended the meeting.

In the past, they didn’t even have a direction and could only imitate Big Brother completely.

But now, Li Mu has given them a direction, so no matter whether it takes five years or ten years, they will realize this helicopter independently designed and developed by Xia Country!
……

three days later.

After staying at the research base for three days and helping the Institute of Aeronautics temporarily solve theoretical problems, Li Mu was ready to leave amid everyone's reluctant gazes.

Tang Yanjie held his hand and said, "Advisor Li, please come again when you are free. We are all waiting for you."

In fact, he didn't want to let him go, but Guo Mo's phone call was not enough, and he even alarmed his leader to come forward.

"Don't worry, I will come over when I have time." Li Mu nodded with a smile, and after closing the car door, he let out a long sigh.

The people at the Institute of Aeronautics were really too enthusiastic. A large group of people surrounded him all day long and conducted research based on the theories he put forward.

"After all, the foundation is too weak and there are too many problems to be solved!" Li Mu sighed secretly.

He worked hard for three days, but was only able to get the experts and professors of the School of Aeronautics to get started with the research. As for whether it would be successful, it was still hard to say.

The lack of core information about the engine is one issue, but the most important one is the basic problem.

Their processing equipment are basically machines that have been eliminated by the big brother, and it is hard to say whether they can achieve the designed precision.

All in all, the development of Xuanniao-1 is full of difficulties.

……

After leaving the research base, Li Mu did not rush home, but went to the Semiconductor Research Institute first.

Wang Shoujue told him that the supercomputer research progress had been relatively smooth in the past three days, and at least there were no major problems for the time being.

"I'm glad everything went well. Thank you for your hard work." Li Mu nodded slightly after listening.

Wang Shoujue waved his hand: "What's so hard about this? I'm just following the direction you set. But you, are you exhausted?"

He only found out about the visitor from the Aviation Institute after Li Mu left. He thought he would only be gone for an afternoon at most, but he didn't expect him to be gone for three days.

"I'm not tired, it's just that they're too enthusiastic over there, and I can't leave on my own initiative. I might as well solve all the problems once and for all before leaving. That way, they won't ask me to go over again in a short time." Li Mu said.

According to his estimation, it would take the Aviation Academy at least a week to digest what he had given them, not to mention the time required to start research and development.

Wang Shoujue said, "Is that so? Why don't you go back and rest for an afternoon? The supercomputer isn't busy anyway, so there's no need to get into work so quickly."

"Okay, I'll just take a walk and leave." Li Mu looked at the time, it was already 3 o'clock in the afternoon, so he agreed.

Afterwards, he asked Wang Shoujue to take care of his own business, and then went to Huang Xinhua to check on their research progress.

CMOS image sensors have been successful and are now in mass production.

Seeing that they did not encounter any major problems, Li Mu did not intervene without authorization. He chatted with Huang Xinhua for a while about the future development direction of integrated circuits, then got up and left.

……

Return to the special building.

Li Mu took out the key, opened the door with a "click", walked into the house, put his briefcase on the shelf at the entrance, and then sat on the sofa to rest for a while.

When I was about to get up and go to the study, there were two knocks on the door.

Hearing the sound, his body instantly sat up straight.

Just as I was wondering who it was, a familiar voice came from outside the door: "Li Mu, are you home?"

"Teacher?" Hearing the voice, he hurried forward to open the door.

The person outside the door was undoubtedly Master Qian Wu.

Seeing him, the latter smiled and said, "I knew you were back. Come on, come over to my place and have a cup of tea."

Having said that, he took Li Mu's hand and went back home.

……

Now March is more than half over, and the two children of the Qian family have gone out to school. Only the teacher's wife Jiang Ying is at home. When she saw Li Mu coming, she greeted him with a smile and then made tea for both of them.

While drinking tea, Master Qian Wu smiled and said:
"How's your research going lately? Are you still busy? When are you going to make the surface-to-air D-bomb?"

"You are different now. You have won an award and are a nationally renowned scientist. You can consider moving up a level."

"As long as you complete your doctoral dissertation, you will definitely have no problem becoming a full professor directly."

"Teacher, what you said is true. Even if I graduate, I will still be your student, right?" Li Mu smiled and continued, "As for the research on the surface-to-air D bomb, I will definitely do it when I have time."

Hearing this, Master Qian smiled and said, "We still have to hurry up. If you have any difficulties, come and ask me."

"Although you have a solid foundation in basic knowledge, researching D-bombs is not that easy. You can't just work in isolation. You still need to learn more and ask more questions."

"Teacher, you are right. I have learned a lot." Li Mu responded repeatedly.

He knew that Master Qian Wu was thinking about him and was worried that he would not be willing to put aside his pride to do research because of his baggage.

In fact, he didn't have any burden. The more he learned in the field of applied physics, the more he felt that studying surface-to-air D bombs was not a simple matter.

In fact, it is not difficult for him to have Xia Country possess the surface-to-air D missile now.

The difficulty lies in having enough surface-to-air missiles to intimidate neighboring countries, and even the U.S. Empire and Big Brother.

(End of this chapter)