Many people only know that our country attaches great importance to the development of the aerospace industry, but few people can tell the reasons for this.
In addition to the fact that the aerospace industry represents the future of mankind, there are also deeper practical factors.
That is the development of the aerospace industry, which can bring us strong economic benefits.
The aerospace industry in the sky is actually for the development of the earth. Every dollar invested in the aerospace field will receive 7 to 12 dollars in return, and the return on investment has reached 10 times.
This conclusion is not made by an expert, but is an assessment conclusion drawn by multiple research institutions using different methods and models, which is extremely authoritative.
In our country, there are more than 1,000 new materials, 80% of which are developed from aerospace technology. Space technology is being widely used in communications, medical and other industries.
For example, the coins on the high-speed train can stand still without feeling any vibration at all. The reason behind this is the shock-absorbing system derived from aerospace technology.
Diapers, ear thermometers, microwave ovens, solar panels, memory foam, spray styling mousse, and dehydrated vegetable packets in instant noodles and other derivative products are all manifestations of the application of aerospace technology in daily life.
The development of the aerospace industry has driven the development and progress of satellite technology, high-end equipment, new generation information technology, new materials, energy conservation and environmental protection, biomedicine, food and other industries.
What’s more, the aerospace industry also represents the future.
What is the basis of human existence?
is an available resource!
Resources exist objectively and are subject to spatial scale and limitations. Because of the conservation of energy and matter, resources in any limited space are certain, and their exploitable value also has boundaries.
‘Availability’ depends on our technical capabilities, demand direction and resource abundance.
Just like the natives of the Black Continent, they would not think of exploring the universe and galaxies, not only because they have no need, but also because they have no strength, and need precedes strength.
The first goal they have to accomplish is to eat enough to fill their stomachs. Only when they are full can they have higher pursuits.
Technical capabilities are the basis for realizing demand. If there is no strong domestic industrial manufacturing capabilities, there will be no development of the aerospace industry at all.
The development of aerospace technology expands the cognitive boundaries of mankind, understands the objective world and physical laws beyond the earth, can explore new resources, new energy, and new environments in the vast universe, and can provide a large number of resources to solve human problems contradictions in social development.
It is no exaggeration to say that the development of aerospace technology will bring the opportunity and right to survive. Whoever discovers it first will take advantage and whoever mines it first will own the resources. This is A principle that is absolutely correct in the universe.
Major countries around the world have this consideration in developing aerospace technology.
The ultimate goal of our development of aerospace is to have this priority. As humans rush on the road to death and develop various terrorist weapons, the earth's environment becomes more and more fragile.
Throughout human history, war has always been a constant presence. In modern warfare, as long as you master the air, you can basically control the war situation, and space is an indispensable strategic node.
At the same time, the development of the aerospace industry can also greatly stimulate national pride and self-confidence.
It can be said that apart from the disadvantage of burning money, the aerospace industry has all the advantages.
The reason why Wang Donglai chose to develop aerospace technology was actually out of this consideration.
The reason why I am not going to take the official route and choose to start my own company is the reason mentioned before.
Through commercial means, we can control, reduce and eliminate the gap between rich and poor and other issues.
National Key Laboratory of Aerodynamics.
As the director of the laboratory, Deng Gang is naturally qualified to invite Wang Dong here as a guest.
After all, Wang Donglai has passed the academician examination, and his status has undergone a qualitative change.
Some units and laboratories that do not involve the core are naturally eligible to enter.
What's more, Deng Gang, the director of the laboratory, personally invited him.
"Academician Deng, what do you think of Bald Eagle's SpaceX company?"
Wang Donglai took the initiative to ask.
Deng Gang glanced at Wang Donglai and replied loudly: "To be honest, I am not very optimistic about the development of this company."
"If I remember correctly, the founder of this company is preparing to develop reusable rocket technology, but this company inherited technology from NASA, and as a businessman, he is naturally thinking about saving costs. Create greater profits.”
“In this way, the cost is reduced, which is immediately reflected in the safety performance. It has exploded in many launches. This is the most important thing. Big proof.”
“Of course, the positive significance of SpaceX cannot be denied.”
“Bad Eagle’s bold advancement in commercial aerospace, coupled with its deep and complete aerospace industry foundation. , This is worth learning.”
“In this regard, the Galaxy Technology founded by you, Academician Wang, has also filled the gap in the country.”
Deng Gang said it very tactfully, but Wang Donglai could tell that Deng Gang was not optimistic about SpaceX and his entrepreneurial behavior in civilian rockets at all.
“Academician Deng, although SpaceX has failed several times, I think this is a promising development direction. Every space rocket launch does not count the investment of talents, but only the investment of funds. , can be regarded as a big cost.”
“Reuse and save costs, although safety cannot be guaranteed, but on the other hand, it can force technological progress, which is not a bad idea. A promising avenue for development.”
Hear. When Wang Donglai said this, Deng Gang smiled and said loudly: "Academician Wang, our national conditions are different from those of Bald Eagle. They can vigorously develop commercial aerospace, ignore safety, and conduct radical test flights, but there is no such soil in China."
"If In terms of cost, the cost of our rocket launches is also very high, but compared with the Bald Eagle, it is nothing. We value safety more, and would rather be more stable and slower, but we must also ensure that the technology is fully understood and safety is guaranteed. .”
"The recycling plan is nothing, and it can be done domestically, but it is just a trail. We still have a lot of technological breakthroughs in the aerospace field. Now is not the time to pursue these things."
As a national dynamics The director of the laboratory, Deng Gang, naturally has access to a lot of secret information.
At this moment, seeing Wang Donglai’s expression, he couldn’t help but raise his eyebrows.
The reason why Wang Donglai raised this topic with Deng Gang was not to get any support from Deng Gang, but just to express his thoughts through Deng Gang.
Waiting until later, Galaxy Technology has completed a breakthrough in commercial rocket technology, and it will not become too abrupt.
If you are half a step ahead, you are a genius; if you are one step ahead, you are a monster.
“What Academician Deng said makes sense, but Galaxy Technology’s revenue is pretty good and can support my idea for the time being. It would be a pity not to give it a try.”
Wang Donglai said to Deng Gang with a smile.
Hearing this, Deng Gang nodded suddenly and said, "Indeed, sometimes I subconsciously forget that you are still the founder of Galaxy Technology, and you are not short of this little R&D funding."
"Listen. When you say this, I really envy you. You can do academic research according to your own wishes without worrying about academic funding applications or approvals. "
"Our country has a long history and has owed a lot of lessons in modern times. It has been making up for the lessons over the years. Scientific research funding is budgeted. Therefore, in many fields, due to lack of money, we have to be careful and have to seek stability rather than slowness. A little bit, too We can’t take risks.”
“What’s more, we are already in a catching-up position. If we fail, it will have a huge impact on the country, so we cannot fail easily.”
“ You don’t have research funding You can be more radical without having to bear the pressure of national expectations.”
Wang Donglai nodded and said, “That’s true. I think this is the case when the country opens up private capital to the aerospace field. "Besides, Galaxy Technology makes so much money in China, it would be too wasteful if we just want to put it in the bank. It is better to use it to do something that benefits the country and the people." Exploration of scientific research and technology.”
"But Academician Wang, I still want to remind you that the development of technology is one step at a time, but you must not be eager for quick success, especially in such a high-precision field, it is also a good thing to make more preparations."
Deng Gang had a good impression of Wang Donglai, so he reminded him again.
“Thank you, Academician Deng, for reminding me, I will do this!” Wang Donglai said with serious thanks.
Soon.
The two of them arrived in Deng Gang's office, and their conversation also touched on the core of the Rockets.
Rocket engine!
The liquid oxygen and kerosene rocket engine with the largest single nozzle thrust in the world is the F-1 liquid oxygen and kerosene rocket engine developed by Bald Eagle. It weighs 8.4 tons and has a thrust of 683 tons at sea level. The thrust-to-weight ratio is about 81. The plane specific impulse is about 263 seconds, and it is the first-stage engine of the Saturn V launch vehicle, the Bald Eagle moon landing rocket.
The thrust of Maoxiong's RD series liquid oxygen kerosene engine can soar to about four to five hundred tons. If it is modified, it can be tried to seven or eight hundred tons. It is extremely powerful.
The key is that this engine was mass-produced by Mao Xiong in the 1980s.
The bald eagle is so proud that he needs to buy this engine from Mao Xiong.
But for us, the fur bears are not willing to sell.
In terms of liquid oxygen and kerosene engines, the gap between us and Mao Xiong has always existed. Even before Wang Donglai was reborn, we still could not catch up.
Deng Gang is now the director of the National Aerodynamics Laboratory. Although his work is not developing rocket engines, it is extremely important.
For example, Academician Deng Gang proposed a new micro-compressible model for the first time in the world, laying the foundation for accurate and efficient numerical simulation of various Mach number flows.
A new method for numerical solution of low-speed flow was also proposed, and experiments showed that the numerical solution for low-speed flow was successful.
The paper "Two New Numerical Calculation Methods for Mach Number Flow" published has caused great repercussions internationally, and successfully implemented parallel computing on a supercomputer, and also corrected the configuration parameters of the supercomputer. Some problems have made outstanding contributions to the performance testing of the Galaxy super-parallel computer and its successful passing of national-level certification.
There is also a very impressive achievement, that is, in order to solve the flight density, flow field and other related data problems of the return capsule when it returns to the atmosphere, an NND calculation format was proposed to solve the problem of a series of aircraft such as spacecraft return capsules. The technical parameters of flight under various complex conditions won the first prize of the National Defense Science and Technology Progress Award.
To be able to achieve such results, Academician Deng Gang’s attainments in rocket engines cannot be lowered.
“Our domestic research and development of rocket engines is not satisfactory. Although it is already very good, it is still far behind the international advanced level.”
"Mao Xiong mass-produced the RD series of liquid oxygen and kerosene engines in the last world, but we are still developing 200-ton engines."
"Not to mention solid rocket engines and liquid fuel rocket engines. "
"Academician Wang, if you want to develop rockets, rocket engines are indispensable, so which rocket engine is Academician Wang going to use?"
Deng Gang asked curiously.
Mao Xiong’s rocket engines would rather be sold to bald eagles than domestically.
As for Bald Eagle, the Wolf Clause has long been introduced to restrict domestic aerospace development, making it even more impossible to sell their rocket engines.
So, the only way Wang Donglai can buy is through domestic channels.
Advanced products are classified and cannot be sold.
Backward products cannot meet the requirements.
So, Deng Gang was not optimistic about Wang Donglai's choice at all.
High-precision fields such as aerospace and rockets are simply not something that a private company can handle.
Hearing Deng Gang’s question, a confident smile appeared on Wang Donglai’s face.
“I like to challenge some difficult things. Since we lag behind the international level in rocket engines, I want to try to see if I can solve this problem.”
Deng Gang's first reaction was that he heard wrongly.
After picking his ears, Deng Gang asked in surprise: "Academician Wang, are you serious?"
"Of course I'm serious!"
Deng Gang heard Wang Donglai's serious and firm answer, and looked at Wang Donglai seriously again.
After thinking about it, he started rummaging around on his desk.
Soon, he took out a document and said to Wang Donglai: "Academician Wang, this is a project that was just sent to us this morning that requires help from our laboratory. It is about the flight of hypersonic vehicles. Mechanics."
"Flying. When the aircraft was flying at low speed, the test flight showed that the terminal roll maneuverability was insufficient. The following solution was to increase the ailerons. However, for the aircraft that has been designed and finalized, this solution was obviously unacceptable, so we found it. Us.”
"Academician Wang, you might as well take a look at this issue."
As Deng Gang said, he pushed the document in front of Wang Donglai.
The meaning is obvious, I want to test Wang Donglai's true level, and let Wang Donglai give up the idea of developing a rocket engine by himself.
However, Wang Donglai took the document with confidence and looked at it quickly. ,
Wang Donglai knew Deng Gang's thoughts very well, and he was not angry in his heart.
Relying on his [Speed Reading] ability, Wang Donglai read all the documents quickly, taking only about ten minutes.
After reading it, Wang Donglai just closed his eyes and thought for less than a minute, then opened his eyes and said with a smile: "Academician Deng, this question is too simple."< br>
“There is a high probability that the yaw moment caused by the roll angular rate offsets a large part of the aileron’s efficiency. Principle That is, the aileron causes the roll rate, and the cross derivative of the roll rate and the yaw moment causes a yaw moment, which causes sideslip and finally roll, but the direction of the roll is opposite to the desired direction, so The ailerons are not working well.”
Deng Gang blinked, with a clear look of shock on his face.
He was certain that Wang Donglai would never have known about this matter before.
You know, even he only got this document this morning.
There is a complete set of confidential data such as flight control data tables and derivative tables, which will not be easily leaked.
As for Wang Donglai’s answer, Deng Gang naturally knew that it was right.
However, Deng Gang did not show it, but continued to ask: "Does Academician Wang have any solution?"
Wang Donglai said confidently: "It's very simple, increase the rudder front Feedback control provides rudder commands at the same time as aileron control commands to offset the yaw moment caused by the roll angle rate. ”
Deng Gang looked at Wang Donglai's confident and young face and took a long breath.
“A hero makes a boy, this sentence is indeed true.”
“It only took about ten minutes. After you read this document, in less than a minute, Found the problem and provided a solution.”
“If I hadn’t seen it with my own eyes, I wouldn’t have believed it was true.”
“I suddenly have some confidence in your development of rocket engines. Maybe you can also It can really be developed successfully!”
Wang Donglai said with a confident smile: "We will definitely succeed in the research and development!"
The words were sonorous and powerful, and the words landed loudly. (End of this chapter)