"5 times the speed of sound?"

Everyone was frightened by the data that Liu Yue said.

"Liu Yue, it's a good thing to be fast, but the cost is ......" Du Feng felt pain again.

It is difficult for ordinary missiles to reach this speed, 3 times the speed of sound is already relatively against the sky, and it is not a ballistic missile, after flying out of the atmosphere and then entering the atmosphere, under the dual action of gravitational acceleration and engine thrust, it can reach six or seven times the speed of sound.

This is rocket artillery.

And not anti-aircraft missiles.

Anti-aircraft missiles are also not so fast.

"The maximum flight speed of the Soviet hail rocket artillery is only 690 m/s, just over Ma......ch 2," Jiang Zhihe also reminded Liu Yue.

It's not that they don't think this flight speed is achievable.

It's just rocket artillery.

The higher the performance metrics, the higher the cost.

At the same time, the technical difficulties are also greater.

In the process of high-speed flight, the missile is sharply rubbed against the air, and the temperature and pressure are all tests for the missile structure.

To have more strength, you need better materials.

Demand of all kinds is highly elevated, which leads to a sharp increase in costs.

Missiles with higher speed and efficiency can be produced domestically, but they have never been produced for no other reason - the cost is too high.

"Leader, we are currently in the experimental process, and we can only further improve when we have experimental data, and then balance speed, power, cost, etc. Liu Yue's request is not excessive.

This engine will not only be used for 273mm rocket artillery in the future.

If the structure is improved, it can be used on missiles.

"It's just the experimental phase. The cost of each rocket will be controlled within 50,000 yuan, and the data obtained can lay the foundation for subsequent projects...... Liu Yue continued.

In the field of aerodynamics, he studied with Dean Qian, and this level is naturally not bad.

It was also because he studied with Dean Qian that he proposed such a speed, which was not questioned.

Dean Qian has absolute authority in the field of aerodynamics in the world, and this is von Kármen's most proud student.

It just so happened that Liu Yue also became Qian Lao's most proud student.

Otherwise, how can it be that graduate students don't need to study theory, only need to take exams every semester, submit papers when they should submit them, and then finish their work?

This is also a historical precedent.

"You know, that kind of wind tunnel experiment is very expensive, and it is all for the launch vehicle and the east wind......" Zhao Guoyun hoped that Liu Yue would change his mind.

However, Liu Yue was resolute.

"Leadership, eight million expenses, most of which are used for these experiments. If research in this area is not carried out, much money can be saved. Of course, as long as the results come out, the follow-up project modification work will be much easier...... "Liu Yue knows what they care about.

There are a lot of gaps in aerospace.

Whoever has more projects will get more funding as long as the research progress is fast.

"Okay, let's talk to the other side, and you can produce the theoretical model as soon as possible. Jiang Zhi discussed with a few people, "This is the first research topic you enter the base." ”

"There are also 107 single rocket launchers and 80 mm individual anti-tank rocket launchers!" Zheng Jianguo reminded the leaders.

You can't just erase Liu Yue's credit.

"You ask himself, how embarrassed is he to give such a project to his teachers?"

Liu Yue was really embarrassed.

Besides, these have been done before, when the homework is handed in.

Otherwise, he could have come up with so much information so quickly?

Liu Yue and Zheng Jianguo, after the leaders of the headquarters agreed, they went directly to the people of the Aerodynamics Research Institute.

Since the project funds were given to the 2186 factory, the headquarters no longer allocated funds, and all kinds of costs were settled by the 2186 and the cooperating units.

"Full-size, our ultra-high-speed wind tunnel isn't that big!"

Regarding the intentions of Liu Yue and Zheng Jianguo, the Aerodynamics Research Institute of the base already knew that Ma Xiaoguo, the person in charge of the wind tunnel laboratory, was a little embarrassed.

"Senior brother, isn't the length of our wind tunnel here at 5 times the speed of sound eight meters, and the length of our rocket is only 7.2 meters, so there is no problem at all......," Liu Yue hurriedly explained.

Zhao Guoyun, who came with him, was happy, "You kid is messing around with relationships, he is not your senior brother, this is a graduate of Harbin Institute of Technology, and he studied with Professor Ma Mingde......

"You ask Director Ma, do I have any screaming......" Liu Yue despised Zhao Guoyun.

He naturally knew that Ma Xiaoguo was a student of Professor Ma Mingde, the father of China's wind tunnels.

But the internal situation, Zhao Guoyun definitely doesn't know as much as he does.

Before coming, Liu Yue inquired about the big names here.

He was right. When I was studying with Professor Ma, it happened that Marshal Nie proposed to set up the 16th professional group to unify the national aerodynamics research, with Dean Qian as the team leader and my teacher as the deputy team leader, and I also learned a lot from Dean Qian, otherwise I would have gone to the airplane...... "Ma Xiaoguo didn't care about this.

Liu Yue shouted Senior Brother, it is indeed true.

"And this one?" Zhao Guoyun really didn't know.

He really didn't know.

"How did our domestic wind tunnel group come about, don't you know? It is not an exaggeration to say that Professor Ma is the father of our domestic wind tunnel. In terms of aerodynamics, apart from my teacher, I will serve Professor Ma!" Liu Yue was not modest at all.

The veteran professor, who received a master's degree in aeronautical engineering from the University of Michigan in 1939, focused his research on aeronautics.

In the 60s, China's first supersonic wind tunnel and large-scale low-speed wind tunnel were built by Professor Ma Mingde.

Kazakhstan military industry, this is the existence that everyone looks up to in this era!

This is the cradle of military specialists, but also of generals.

Liu Yue originally wanted to go to Kazakhstan military industry, but it is no longer the previous Kazakhstan military industry.

In the end, the University of Aeronautics and Astronautics

The purpose is to have a good relationship with a group of bigwigs, and then use the aura of the bigwigs to engage in their own projects.

Professor Ma Mingde's achievements in domestic aerodynamics are not much worse than that of Dean Qian, and the textbooks of "Flight Mechanics" in the field of aerospace are all written by him.

Of course, Liu Yue studied "Missile Flight Mechanics".

I also came back from the United States, and it was only because Professor Ma Mingde was not involved in some confidential projects like Dean Qian did when he was in the United States, so there were not too many twists and turns when he returned to China, and he came back after graduation.

Otherwise, the Americans would not have been able to let him go back at all.

If there was no Professor Ma Mingde, the construction of China's wind tunnels would not have been so smooth, and he was responsible for the earliest wind tunnels.

Later, the J-20, J-50, and even the wind tunnels of the Shenzhou series of spacecraft were all based on Professor Ma Mingde's research in the field of wind tunnels......

Ma Xiaoguo in front of him is a student of Professor Ma Mingde, and his business ability in this area is naturally not bad.

"Alright, let's get down to business. Zhao Guoyun's face was a little unbearable.

"It's too long, our wind tunnel uses the method of rushing up and down to achieve such a high wind speed, and the full-scale model will have a great impact on the airflow in the wind tunnel......" Ma Xiaoguo didn't say more, but told Liu Yue that it was very difficult, "Why don't you directly use a scale model......?"

"Just go with a full-size model, which will reduce a lot of work. Senior brother, you know, we have little money...... Liu Yue is not unaware of the situation, "In fact, this design only needs 3 times the speed of sound, and the entrance is almost just right......"

Ma Xiaoguo's eyes widened, "This cost has increased a lot......

"How much does it cost?" Zheng Jianguo asked on the side.

When he got here, he didn't even dare to breathe.

are all experts in the field of aviation, and he is a small factory director, which is not enough to see at all.

In addition, the 2186 factory has not developed new products before, and they are all improved in the original design, and the monomer does not need to be changed at all.

The wind tunnel at the base, which is all for the research of large missiles, he came to join in the fun.

"300,000! This takes a lot of time, and the energy consumption is relatively large...... There is not enough time, and the data obtained is not comprehensive. Ma Xiaoguo thought for a while.

"It costs 300,000 yuan to blow a wind tunnel?" Zheng Jianguo suddenly jumped up, "Let's make a cannonball modification, and only give 500,000 yuan on it...... If only that shell also blows the wind tunnel......"

"That cannonball, it really has to blow the wind tunnel......" Liu Yue's words suddenly made Zheng Jianguo meng.