The military-industrial scientific research system of the academic master.

"Well... as far as our relationship is concerned, I won't beat around the bush. The patent budget given to me is 5, authorized for two years, and will only be used on a specific model of propeller blades."

Fang Zhen directly gave a fairly sincere number.

A license like this with a very short license period and very limited scope and method cannot command a too high price.

Of course, if you find a lawyer who specializes in patents and fight with the other party, it's probably not a problem to ask for a few thousand to ten thousand, but it doesn't seem necessary.

After all, there is still a relationship with Fang Zhen.

Moreover, in the 90s, the domestic intellectual property management was in a mess. If the other party was really pressed, they would directly infringe the rights. The cost of litigation for Chang Haonan was also very high.

So that's fine.

"The amount and licensing method are fine, but with this high-altitude swept-blade propeller, you want to generate electricity in the sky?"

Chang Haonan opened the file bag, which contained basically some legal documents and did not involve much technical content.

Due to the principle of propeller propulsion, no matter how high the design efficiency is, problems of insufficient thrust and lift will occur at high altitudes where the air is thin. Therefore, unless a propeller aircraft adopts a particularly exaggerated aspect ratio, whether it is a piston or a turboprop, The ceiling is basically around 10,000 meters.

Only a few cheaters like paddle-fan engines can further break through the heights.

He remembered that in his previous life, he had the wild idea of ​​bringing a wind turbine into the air with a floating balloon, using the strong winds in the troposphere to generate electricity, and then transmitting it to the ground, so he asked this question.

It's just that this kind of thinking is of little value from the perspective of engineering practice. If you really take on a similar project, the best choice is to grab the bucket and run away.

"That's not true. The project I'm working on now is to cooperate with a team engaged in meteorological research at Zhejiang University to design a high-altitude airship for them that can maintain its existence in the stratosphere for a long time."

Seeing that Chang Haonan was interested in his project, Fang Zhen simply pulled a chair and sat next to the former:

"Because it may take two or three months once it is put up, during which it needs to move within a certain range to track meteorological conditions, so it must have a certain degree of independent power."

Although meteorology at Zhejiang University has declined a bit in recent years, since the founder of modern Chinese geography and meteorology was their former president, its reputation is still there, and it should not be used to deceive people with fake projects.

"High-altitude airship..."

This unexpected term struck a chord in Chang Haonan's mind:

"How tall is it?"

During the summary meeting in Dongnae the day before yesterday, someone proposed to build a communication relay aircraft to solve the problem of data transmission beyond 600 kilometers due to the current insufficient number of communication satellites.

When chatting with Luo Huichuan before, he also mentioned that the reason why aviation units rarely fly to the depths of the South China Sea in recent years is that in addition to the limited range of aircraft, another big factor is that it is difficult to communicate with them after flying far away. Get in touch with the base in Qiong Province.

It shows that this demand still exists.

And not only for military use, this type of equipment can also provide emergency communication support in the face of emergencies such as major natural disasters.

It's just that the cost of building a few aircraft was too high and the effect was limited, so it didn't take shape.

But now that I think about it, if we abandon the fixed-wing platform and use airships, it seems that our ideas will suddenly open up.

"They want to study something called the stratosphere's quasi-zero wind layer. The height is about... 22km to 28km. Near this range, the east-west wind changes, and the north-south wind component is also very small. It can use less energy and The power cost realizes the regional residence or trajectory planning of the aircraft.”

"For example, the airship we are designing now has a load capacity of about 16 to 25 times in seasons with zero wind layer compared to seasons without zero wind layer."

Very exciting data.

Although it may be difficult to deploy a radar on it, it should be enough if it is just used as a communication relay.

"In other words, the appearance of this zero wind layer is seasonal?"

Chang Haonan raised his eyebrows.

If this is the case, the situation will become somewhat complicated.

Engineers still prefer stable phenomena.

"This is what they are preparing to study. It can currently be determined that there is a stable zero wind layer from the end of May to the beginning of September in the area around 10° north latitude near Qiong Province, with the average wind speed not exceeding 5m/s. This data is also The standards I used when designing airships. As for the more specific theoretical part, they told me something like El Niño-Southern Oscillation, but to be honest, I didn’t understand it at all. If you are interested, I can put that I’ll give you my contact information.”

"I have……"

In fact, the first person Chang Haonan thought of just now was Lin Guofan. The two had cooperated quite well when making aircraft icing predictions, and the other person was also a meteorology expert and should know more than himself.

But this project is something that Zhejiang University has not yet completed. In academia, it is almost taboo to reveal the results that others are working on but have not yet published publicly. It is a taboo for digging up people's ancestral graves, which is very damaging to the reputation.

So he thought for a moment and finally nodded:

"Okay, then senior brother, please help me contact them and tell them that there is a research on the application level that needs to be cooperated with them. Both Beijing Hang University and Electronic Technology Group will participate."

Although he had not yet made contact with Institute 14, Chang Haonan still firmly brought the other party in.

The main reason is that these days, Dianke Group is a relatively wealthy owner, and their name will be more attractive.

"Why should I contact them? You can just send them an email."

Fang Zhen pointed to a computer next to him.

It was the one on which Chang Haonan had previously calculated the wing flutter model.

"Is the laboratory connected to the Internet?"

Chang Haonan blurted out, and then he felt that this question seemed a bit similar to "How is the war situation on Reach".

But there is no way. Since he started participating in the 83rd Project last summer, he has not spent much time in school, and he knows almost nothing about the situation in the laboratory.

"Yeah, it happened at the beginning of the year."

Fang Zhen nodded, stood up and opened the computer next to him and the cat hanging on the wall next to him. The latter then made a creaking dial tone:

"Not just laboratories, but also places like classrooms and libraries are connected. It is said that the school plans to provide Internet access to student dormitories next year, but they will all be charged by the hour."

The second half of the 90s was a period of extremely rapid development of China's Internet.

On April 1994, 4, China officially connected to the international Internet, but there was only one 20K international dedicated line in the country.

By 1995, only a handful of large cities across the country, such as Beijing, Shanghai, and Pengcheng, were connected to the Internet. However, until Yinghaiwei was founded, there were still no ordinary users.

By 1997, almost all large and medium-sized cities had Internet connections.

He didn't pay attention to it for more than half a year, so the changes were naturally earth-shaking.

Chang Haonan stood up and sat in front of the computer connected to the Internet.

In the 90s, it was still illegal to use a router to connect two or more computers to share the network. Although many people did it secretly, it was definitely not feasible to do it with great fanfare in the laboratory, so the computers on other workstations were Can't access the Internet.

"Is it a domestic network or a foreign network?"

This is what Chang Haonan is most concerned about now. He wants to develop multi-physics simulation software in the future, and research in this area requires reference to many foreign research results. There is absolutely no future in relying on paper journals alone.

If you can only access the intranet, it doesn't mean much.

In this era, there was physical isolation between the internal and external networks, and it was not like in the later days to just get a VPN and be able to access it at will.

"what?"

Fang Zhen turned around, with a bit of confusion on his face.

The most he usually uses the computer is to send emails, and he doesn't care much about that.

Chang Haonan had no choice but to rely on his own memory and change the way he asked questions.

"Uh... the first three digits of our dial-up phone number are 163 or 169?"

163 is the Internet, and 169 is the domestic network.

"It's 163. It's very expensive. I heard the teacher say it's 6 yuan an hour. I suggest you edit the content of the email before sending it online."

well.

Chang Haonan secretly celebrated in his heart.

Finally, it has a bit of a modern meaning.