When they returned to the compound, Lin Xue, Liu Min and Cheng Ying said that they would go home and put their schoolbags first after gathering at Shen Yi's family for a while. Shen Yiyi took the three boys home alone. At the gate of the compound, the soldiers standing guard still dutifully asked for registration. Shen Yi asked the three of them to write down their visitor identities while conducting opportunity education: "Let me tell you, the rules of the compound are like this, so when you look for me later, if there is no one in my house, you won't be able to enter." ”

Luo Yu wrote his name and said nonchalantly: "I know the way." It's pretty much the same in our house. It's just that it's not the PLA soldiers who are standing guard, but the factory public security department. ”

Shen slapped his forehead with one hand, forgetting about this. Shen Fei is also a military enterprise anyway, according to the design of the 50s, the family area is often either next to the factory or simply in the factory. This kind of enterprise generally has two doors, one outside and one inside. The family area is just inside the first gate and outside the second gate. Therefore, the door of these Shen Fei's children should not be so easy to enter. Having said that, the security guards at the entrance of the community in later generations actually did this job, but there was a difference in organization and discipline, as well as power.

The boys in the three places may be the first to come back to the garrison's camp, and they are looking around for a long time. Shen Yiyi deliberately said to them with a straight face: "Don't look around at things you shouldn't see, this is a confidential place, don't let people arrest you as spies." ”

Fang Bing and Li Xiang listened to Shen Yiyi's words, they were very embarrassed, so they didn't squint in a proper manner. But Luo Yu still didn't take it seriously. He followed behind Shen Yiyi with a smile, turning his head down from time to time.

Shen Yi thought to himself. Sure enough, it seems that this guy Luo Yu should be the head of these three people. If you are not a leader with a bit of status in the family, if you want to be born in the next life, you must be a cheat. Fang Bing and Li Xiangjia should still be relatively ordinary technical personnel. The attitude of this official to authority is not quite the same as that of a child from an ordinary family. Generally, the children educated by parents with a little power are born very clear, which rules must be followed, and which rules are just listened to, and don't take it seriously. And when ordinary children don't understand it at first, they always think that the rules must be followed, but they don't understand the difference.

In fact, Shen Yiyi himself prefers the logic of ordinary people. It's because the children from official families don't take the rules seriously. Then the rest of the society did the same, and the ultimate consequence was that no one in the whole society took the rules seriously, and the society gradually entered a state of disorder. In the final analysis, the environmental crisis, food safety crisis, and integrity crisis in later generations are all caused by the fact that everyone does not take the rules as the same thing. However, Shen Yiyi knows a truth more well, people in society are to adapt to society, not society to adapt to people. If there is a generally accepted rule in the circle you live in, don't challenge that rule when you're not strong enough. Instead, you should first integrate into the circle, and then wait until you are strong enough to change the rules.

There is no one else in the house. Division Commander Shen is still training below. Shen's mother should still be on duty at the hospital. Although according to the regulations, there is actually an orderly or a guard at home, but Shen's mother and Master Shen are not used to putting on any prestige. Therefore, Brother Zhao Zhao spent more time with Master Shen to train below, rather than being on duty at home. Shen's mother is also a very kind person, and often says that other people's children are not a few years older than their daughters. I joined the army and left my father. Blame the pitiful. So when she saw Zhao Wei, she really treated him like her own son and nephew, and asked Shen Yiyi to call him a brother. Shen Yi pouted in his heart when he thought of it. My mother always wants to find some brother for herself, whether it is Peng Weining or Zhao Wei, she calls herself brother, is she so lacking in brother? Shen Yiyi felt that his mother might be expressing some kind of regret for not being able to come out of the boy before the one-child policy was implemented. Thinking of this, Shen Yiyi felt that his mother was a little pitiful, hoping that her son did not give birth to a son, and that she should obey her wishes as a daughter. The next time I saw Zhao Wei, I would affectionately call him ———Little Viagra.

Viagra ......, Shen Yiyi suddenly thought of a certain small blue pill, and burst out laughing, so that Lin Xue Chengying, who had just entered the door, saw that they didn't know what was going on.

Cheng Ying was very anxious, and as soon as she entered the door, she hurriedly asked Shen Yiyi: "Yiyi, you say, what good things have you thought of to improve the combat effectiveness of our division?" What can we do? ”

Lin Xue stopped her and said, "Cheng Ying, what are you anxious about, aren't you going to tell us one by one?" ”

Shen Yi nodded. She motioned for Luo Yu to take out her things. Luo Yu smiled and took out a photo from his bag. The three girls on the side hurriedly leaned forward. Cheng Ying then asked strangely: "What is this, is it a parachute?" You're not going to parachute during our division's exercises, are you? And they are not airborne troops? Where can a transport plane get them to the sky? ”

Luo Yu patiently explained: "This is not a parachute, to be exact, this is called a paramotor." A parachute only allows you to fall safely from a high place, but a paramotor is an umbrella that allows you to fly from the ground to the air. ”

I saw that the three girls still seemed to understand whether they understood or not. Shen Yiyi simply found a piece of paper and drew a diagram, and began to explain the principle of paramotor. Luo Yu also added some content from time to time on the side. After talking for a long time, the three girls who had no foundation finally understood that the paramotor is actually a parawing with the function of an airplane wing, plus an engine and fan propulsion device, so as to be able to carry people into the air. You can also think of a paramotor as a small aircraft that can be disassembled.

"Can this parachute-like thing really take people to the sky? Is this possible? Lin Xue asked her question. After all, in the eyes of the Chinese, she has only seen a parachute, and this is said to be an umbrella that can fly, and this is the first time she has seen it.

Shen Yiyi smiled, and she simply drew a profile to show Lin Xue: "Xiaoxue, look, the parachute is like this." You can also think of it as a large umbrella. We have already learned in middle school physics that the larger the size of the umbrella. the greater the air resistance. The parachute is to use the drag of the air to reduce the acceleration of gravity. ”

"But this is a section of a paramotor, you see. It is in such a shape. Hydrodynamics has been calculated and tested to show that the structure of this profile is capable of generating lift when encountering parallel incoming flows. This is actually the principle of airplane flight. That's what the wings of the plane do. Paramotors, on the other hand, have similar profiles to airplane wings, so they can also play a role in generating lift. ”

Shen Yiyi may not have discovered it herself, but she actually enjoys the feeling of being a good teacher. In the process of explaining a certain principle or knowledge, so that others do not understand it to understand, she will feel happy in her heart, and even her eyes will sparkle when she explains.

Obviously, the three boys in Shen Fei No. 1 also have the potential to be a master of art in the future. They will also devote themselves to this kind of technique when they talk about it, after listening to Shen Yiyi's explanation. They will also join in the discussion and explanation, although the way they talk about the formula or something shows that they are indeed very knowledgeable in this area, or it may be a family history, but unfortunately, except for Shen Yiyi, the other three girls can't understand it.

But the most critical problem has been solved, and the three girls have understood what it is. Then thinking about the situation if this equipment could be used in the exercise of the first division on a long march, Cheng Ying immediately became excited.

However, Shen Yiyi still stopped Cheng Ying's request to start making a sample umbrella immediately. She said to her friends, "Don't worry, everyone. We're just learning the principle of this paramotor now. There are still a lot of problems to be solved. ”

Luo Yu also interjected and said, "Classmate Yiyi said it well. This photo taken by my grandfather when he went to Guangxi for a meeting in '91 was a paramotor flight show brought by the French. However, at present, there is still no unit engaged in this research in China. Those who study airplanes think that the technical content of this thing is too low. There is no way to establish a project for research and production. So the last time I talked about this with my classmates when I was studying in the city, she asked if it could be used as an interest group activity among the participants of our physics competition, so that everyone could apply what they had learned and make one of their own. ”

Shen Yiyi followed and said, "Yes." Do you know the way? In engineering, to solve the problem, one of the problems that needs to be solved is the material problem, and the other is the power problem. This is not the kind of carpentry or handiwork that we talk about in our labor skills class. This is the last thing to be able to fly, and if something happens, it's a matter of life. Can't rush out. ”

Indeed, engineering is not about writing fiction. A simple sentence can be used to study something. It is necessary to pay hard work from design, trial production to experiment to get the final qualified prototype.

Lin Xue was the first to understand what Shen Yiyi meant. She asked Shen Yiyi directly: "Yiyi, don't say anything else." By doing that, you tell each of us what you need us to do if we're going to get involved. We will do so. ”

As soon as Lin Xue took the lead, Liu Min and Cheng Ying naturally followed: "Yes, Yiyi, you can assign tasks and what do you need us to do." ”

Shen Yiyi nodded with satisfaction. She pulled out a piece of paper and began to line it up.

"First of all, let's start with the design of the wing. Let's assume that the weight of a soldier plus the load is 85kg, and then calculate the amount of lift. This is something that Luo Yu and I can do. Luo Yu nodded in agreement.

"Then, depending on the set lift size, we have to find a practical wing shape, and here's an algorithm that I can write about. Lin Xue, you are good at math, and together with Fang Bing, you are responsible for calculating according to this algorithm......"

As Shen Yiyi arranged the tasks one by one, everyone present felt full of interest. They are about to embark on a practice that will open a new chapter in the history of secondary education in New China. (To be continued......)

PS: I finally finished the second update in order to lead to the later plot, so I have to explain what Shen Yiyi is going to do. However, in order not to waste the money that everyone ordered, I didn't copy a lot from Du Niang. It's good for everyone to have a basic understanding. The new place of work is far away from home, and it takes an extra hour and a half to travel on the road, so the schedule must be adjusted. Three is even more impossible. So I'm trying to keep the double watch this week. I really can't do it, so please understand. At the end, it is still the old saying, asking for collections, subscriptions, tickets, and support.