Chapter 291 Stratospheric Airship and the International Internet
"Well... As far as our relationship is concerned, I won't beat around the bush. The patent budget given to me there is 50,000, and the authorization is for two years. It can only be used in On a specific model of propeller blade.”
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 charge a high price.
Of course, if you find a lawyer who specializes in patents and fight with the other party, it is probably not a big problem to ask for a few thousand to ten thousand, but it seems that it is not necessary.
After all, there is still a relationship with Fang Zhen.
Furthermore, in the 1990s, domestic intellectual property management was in a state of chaos. If the other party was forced to infringe the rights directly, 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, do you want to generate electricity in the sky?"
Chang Haonan opened the file bag, which basically contained some legal documents. , and does not involve too 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 idea has 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."
< br>
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 to put it up, and it needs to be within a certain range during this period. It requires internal activities to track meteorological conditions, so it must have a certain degree of independent motivation.”
Although the meteorology of Zhejiang University has declined a bit in recent years, it has laid the foundation for modern geography and meteorology in China. The person is their former principal, so the reputation is still there, and it should not be used to deceive people with a fake project.
"High-altitude airship..."
This unexpected term plucked a certain string in Chang Haonan's mind:
"How high?"
During the summary meeting in Dongnae the day before yesterday, someone proposed to build a communication relay aircraft to solve the problem of insufficient communication satellites at a distance of 600 kilometers. Data transfer issues.
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 flying It is difficult to get in touch with the base in Qiong Province after being far away.
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 instead, it seems that our ideas will suddenly open up.
“They are going to study something called the quasi-zero wind layer in the stratosphere. 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. Achieve regional residence or trajectory planning of the aircraft with a small cost of energy and power.”
“For example, the airship we are designing now has a load capacity of zero wind layer in the season. 16 times to 25 times the season. ”
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 a bit 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 the contact information."
"I have..."
In fact, the first person Chang Haonan thought of just now was Lin Guofan. The two were doing aircraft icing predictions before. The cooperation is quite good, and the other party is also an expert in meteorology, so he 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, 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 I haven't contacted 14 institutes yet. Contact was made over there, but Chang Haonan still pulled the other party in with determination.
Mainly because these days, Dianke Group is a relatively wealthy owner, and their name will be more attractive.
"Why should I contact you? 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.
“Yes, it happened at the beginning of the year.”
Fang Zhen nodded, stood up and opened the computer next to him, as well as the cat hanging on the wall next to him. The latter then made a creaking dial tone:
“It’s not just a laboratory, it’s like a classroom. The school and the library are also 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 1990s was a period of extremely rapid development of the Internet in China. time.
On April 20, 1994, China officially connected to the international Internet, but there was only one 64K 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, and the changes were naturally earth-shaking.
Chang Haonan stood up and sat in front of the computer connected to the Internet.
In the 1990s, 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 would definitely not work in a laboratory with great fanfare, so other artificial intelligence The computers above are not able to 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 is physical isolation between the internal and external networks. It is not like in the later days to get a VPN and you can access it casually.
“What?”
Fang Zhen turned around, with a look 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 to change the way he asked the question
"Uh... the first three digits of our dial-up phone number, are they 163 or 169?"
< br>163 is the Internet, and 169 is the domestic network.
"It's 163, which is very expensive. I heard the teacher said it costs 6 yuan an hour. I suggest you edit the content of the email before sending it online."
very good.
Chang Haonan secretly celebrated in his heart.
Finally, it has a bit of a modern meaning.
(End of this chapter)