Facing the old man who didn't know how to pretend to understand, Peng Changxu still patiently explained, "Old man, you are wrong, one axis and one rotor, there is a variable in force and moment."

If the torque structure is not considered, a single axis can produce two coupled control quantities of force and moment.

The UAV moves in six degrees of freedom in the air, which generally requires three independent variables to control.

So the optimal form is three axes, three axes are sufficient, and the design of four axes is too redundant. ”

Peng Changxu said as he drew sketches on scratch paper.

Qingyun was a little stunned, but he had indeed seen a drone with three axes in his previous life.

Well, three axes and four axes don't matter.

Since Li Tai can design the car engine in "Tang Brick" to look like a gossip, why can't my brother change the drone to a three-axis?

Triangles are the most stable!

"But what else can such a drone do other than the aerial photography you just showed?"

Peng Changxu put down the pen and pursed his lips, very disgusted, "Yu Guo and the people don't have a bird, after all, it's not a toy?" ”

Mark patted his head, "You can also track meteorological data, it wasn't just reported in the news a few days ago, the atmospheric management bureau over there in the beautiful country uses drones to track tropical storms." ”

"You can also spray pesticides, Sakura started spraying pesticides with drones more than ten years ago." Zhuo Lang also interjected.

Peng Changxu rolled his eyes helplessly, "Let's do something practical, okay?" Don't fool me like a fool. Both of them are large drones. ”

Qingyun figured out his way.

For the country and the people, right?

Easy to do!

This kind of person is better to fool!

Emmm, is his second brother......

Persuade, better persuade.

He still picked up his mobile phone and tied a pencil with Qin Manman's rubber band underneath, "Look at it." ”

The drone took off from his desk and landed on Qin Manman's desk.

Without waiting for Peng Changxu to say anything, he said directly, "Didn't you buy a circuit board on eBay last year?" How long did it take you from placing an order to receiving it? ”

Peng Changxu pondered for a moment, "About two weeks, right?" I don't remember the exact time. Later, I found out that it was better to go to the Chenghuangmiao electronic market to buy ......

I see what you mean, you mean, you can use it to send couriers? This is really an idea, no need to run to the post office. ”

The more he thought about it, the more it made sense, and his eyes involuntarily lit up.

Online shopping must be the trend of the future, and with it comes the contracting and distribution of a large number of goods.

Qing Yun looked at his innocent eyes and rolled his eyes in his heart.

Drone delivery ......

I don't think college students are easy to use, right?

Put on airs!

Toys are what make money!

But painting cakes is still a must.

Yu Min has solved it, and now it's time for Yu Guo.

Qingyun patted him on the shoulder, "Second brother, in fact, the biggest use is still in pesticides."

If you design this kind of small drone in the future that can carry 50KG, it is not too much for the state to give you a medal. ”

Peng Changxu was stunned, "Pesticides? Is this thing worth a medal? ”

Qingyun picked up the phone, pointed the tip of the pen at him, and made a "da-da-da" sound in his mouth, and then flew to the top of his head and threw an eraser "Boom!" ”

"Install another active phased array radar, perfect!"

Qingyun licked his lips, and another sea of mane appeared in front of him.

In the desert of the Middle East, in the mountains of Panmunjom, in the forests near Norway......

All over the world are filled with land flowing with milk and honey.

Everyone was stunned.

This......

Even a girl who is not interested in military affairs at all understands what he means.

Because they have a physics teacher who is a military fan, he often explains the physics principles of some equipment in the classroom.

Zhou Li pointed to the mobile phone in his hand, "Damn!" Are you a pesticide drone? Are you sure you're killing pests? ”

The corners of Peng Changxu's mouth trembled, "Boss, active phased array radar?" You're the Queen of Blades, aren't you? ”

Qingyun shook his finger, "Where do you want to go?" You know, I'm a farmer's son, and I love to plant something. ”

"Hmmm! Yeah! Your hometown loves to grow strawberries the most! Tang Qianying didn't hold back her laughter, her eyes wandering on Qin Manman's body.

Everyone lay on the table and laughed uncontrollably.

Qin Manman blushed shyly, glared at Qingyun, and then went to repair the 'eldest sister-in-law' beside him.

She is now more and more aware that Tang Qianying is too tricky, and the identity of that godsister is too buggy.

The more Qin Manman thought about it, the more angry he became, and kicked Qingyun under the table.

Qingyun rubbed her legs, a little crying and laughing, she didn't open the door in her mouth, close Lao Tzu's!

If you agree, I can gag her right now.

Raising his eyebrows at everyone, he forcibly pulled back the topic, "Installing a radar on the drone to improve accuracy and facilitate the work of farmers and uncles, isn't it just paying attention to the integration of inspection and combat now." ”

Peng Changxu smiled angrily, "Investigate and fight in one? What the hell is this insecticidal word? ”

Qingyun spread his hands and said impatiently, "Why not, mold is also an insect." Okay, it's enough for the country and the people, right? ”

Peng Changxu rubbed his hands embarrassedly, he also understood that he was a slut just now.

He also knew in his heart that what Qingyun asked him to do was actually a drone for the civilian consumer market.

After all, making money is the last word.

The six gourd babies don't have any money now, how to make money is the top priority, and there is no reason to let others make money to spend for themselves.

But it doesn't affect him to design the 'pesticide' drone when he has money later.

When necessary, the people are transferred to the army, which is a normal operation.

"Well, you can see for yourself, to complete such a drone, what do you think is the best major for you to study."

Peng Changxu scratched his head and asked uncertainly, "Automation?" ”

Qingyun opened the college entrance examination guide and pointed to several majors, "Automation, communication, and machinery are all available." ”

Peng Changxu took it and looked at it carefully, "Let's still communicate." If I can't do it, I can do something else. ”

Qingyun sighed, there is no way, automation and machinery are sinkholes now.

At this time, a voice suddenly sounded next to them, "Alas...... If you don't learn automation and machinery, what will you do with the development of the country in the future! ”

Everyone was startled, and when they looked at it, they didn't know when physics teacher Wang Jianjun touched everyone's side.

"Wang Lao ......"

Wang Jianjun smiled bitterly and waved his hand, "It's okay, I understand, the reality is so cruel." When I was farting just now, I was old and sighed. ”

Seeing that the faces of the classmates were a little uncomfortable, Qingyun hurriedly interjected, "Elder Wang, it's okay, the market will adjust." If there is a shortage of people, it will naturally be scarce. ”

Wang Jianjun pondered for a moment, "That's what you said, now it's all about which major is hot, and then it's going to be indiscriminate." ”

As soon as he was in a good mood, he slapped Qingyun on the back, "Hehe, the teacher's bonus this year is for you." ”

Faced with such a joke, Qingyun scratched his head, and had to smile shyly, "Elder Wang, I'll do my best." ”

"Don't have too much pressure, if we teachers really care about this, we teachers will go out to open cram schools a long time ago, and just play with our hearts."

Wang Jianjun smiled and patted him on the shoulder, and walked to the podium, "If you have any questions, please bring them to ask, there is not much time left for you." ”

Before he could finish speaking, he was surrounded by a sea of people.

The physics questions in this monthly exam are very difficult, even in the base class, many people are given a blow to the head by those three multiple-choice questions.

"Humph! I put these three questions at the top to teach you a lesson. Your psychological quality is generally not up to par.

Jiang Xudong, you are a typical, when you encounter a problem in the front, your mentality collapses, you look at the questions in the back for yourself, the last big question is so simple, you are empty. ”

Jiang Xudong's face was flushed, he spent too much time on the first three multiple-choice questions.

Wang Jianjun nodded at Qingyun, "Fortunately, Qingyun reminded me, otherwise if you encounter this kind of thing in the college entrance examination, what will you do?" ”

He retired after teaching this year, but when he thinks about this problem, he is more afraid than other Mesozoic and new generation teachers.

Especially the group of students in the base class, in fact, they are all terrifyingly proud.

If they can't solve the problem, they will vow to solve it to the death, which is their pride.

It is also the reason why they can become top students.

Accustomed to having an hour left to do nothing after writing the paper, they are confident enough that they will not care about the loss of time in the examination room.

However, on a specific occasion such as the college entrance examination, this kind of self-confidence will harm them.

Wang Jianjun didn't worry about being wrong, and the facts have proved that most of the people who gave up the math exam in 03 were usually good students.

When Qin Manman heard this, he glared at Qingyun with beautiful eyes, and wrote indignantly on the sticky note, "Good calculation!" Find ways to take advantage of me, right? ”

Usually during her lunch break, she actually wears a lot.

Since Qingyun won the monthly exam, she can only wear fat times according to the agreement.

Qingyun refused to admit this account.

He swore that the conscience of heaven and earth would definitely not be for her body this time.

Lao Tzu is changing his life against the sky, okay!

After walking like this, let them know that they must not be ironed when they encounter problems in the examination room.

Especially Jiang Xudong's mentality is fragile.

In fact, as long as they persist in completing the exam, the ranking will not be too different from usual.

After all, in the college entrance examination, it is the ranking, not the score.

Even if you smash the pot, as long as you don't give up the test, there is room for operation in the back.

His golden finger is not for nothing.

2003 was an extremely magical year for the college entrance examination.

As for Qin Manman, he could only write, "Hehe...... I'm here for your good. ”

Looking at the words on the sticky note, Qin Manman grabbed his arm hatefully.

Qingyun stroked her little hand and continued to write, "Sleeping with that thing, you yourself are not comfortable, brother, this is for your sake."

Besides, my hands are the best Bra in the world, right? It can wrap and breathe, and it also has a massage effect. ”

Qin Manman's face was flushed with shame, and he took the marker pen and swiped it wildly on the sticky note paper.

Stinky rascals!

After stomping on him, Qin Manman decided to ignore him for 40 minutes and concentrate on his own business.

Seeing this, Qingyun turned his head back and pouted.

I don't know who it is, I always quietly untie the Bra at noon, let myself hold her from behind, and then sleep like a dead pig.

Emmm……

Little fragrant pig?

If you do the questions carefully, the time is actually very mixed.

But today, everyone in the base class felt that every second was going on.

Because of the college entrance examination tomorrow, the school ordered everyone to have dinner at school tonight.

Last year, there was an accident at a school, and a bunch of students with excessive aminotransferases were detected.

Although the incident was caused by the boarding students last year, Jincheng No. 4 Middle School asked all students to eat at school this time.

After all, there are a lot of unreliable parents now.

Just when a group of people were almost hungry and green, the staff and teachers of the cafeteria pushed the food cart and carried the bucket into the door.

Looking at the dishes on the plate, the boys rioted.

Even Qingyun from the countryside was a little unspeakable.

Half a cut corn, half a red root, a cucumber, six cherry tomatoes, a steamed bun, and a bowl of porridge.

The monks are all a little soybean oil and tofu!

How can you eat this clear soup with little water!

The girls said it didn't matter, they were just right to lose weight.

During the preparation for the college entrance examination, the strong fatherly love and mother's love made them lose a lot of weight.

Even Qin Manman's weight has increased by two kilograms this month.

"Bear with me, whatever you eat after the physical examination tomorrow, be honest tonight."

Li Fangping, as the head teacher, took the lead in eating, and next to him was the teacher of the Moral Education Department who was recording the video for parents to refer to later.

They are all only children, and they are all the little sun and moon in the family, and the school has taken on a lot of responsibility for doing this this time.

"Oh, by the way, don't eat cucumbers if you have a bad stomach, it's easy to have diarrhea." When Li Fangping was biting the cucumber, he suddenly remembered this and hurriedly reminded him.

Qingyun pursed his lips and set the cucumber aside.

That's what he's talking about.

Seeing this, Qin Manman picked up the sweet potatoes on the plate and exchanged them with him, "I lose weight, I have to eat less carbs." ”

"Be careful, don't cut the wrong place, I haven't had an easy month." Qingyun bit the corn and whispered.

Qin Manman was stunned for a moment before he reacted, and his little hand reached down and raged on his thigh, "Classmate, I found that you are becoming more and more indecent now!" ”

Qingyun was angry and pushed her little hand away, "I can't eat it, I'm not allowed to spend it!" ”

Qin Manman's face turned red, and then he angrily grabbed him again, "You have eaten less!" ”

Thinking of those fat times that were thrown away, she felt a fire in her heart.

He was uncomfortable, and so was she.

Qingyun sighed twice, "It's like I took the initiative every time." ”

Qin Manman's face was feverish, his silver teeth were biting, and his little hands were desperately pulling his thighs.

Then he turned his head angrily and glared at Tang Qianying.

It's all the fault of this Tianshan Tongma!

Qin Manman was very depressed in his heart.

It's fine if she doesn't understand anything, but after reading so many bizarre comics, she sadly discovers that she is not pure.

After getting through the initial shyness period of the two, now she also begins to take advantage of her boyfriend from time to time.

Emmm……

No, she's sick.

I have a disease called skin hunger, and when the two of us stay together, they always want to be close to each other.

Tang Qianying was stared at inexplicably, looking at her innocently, "Brother and sister, what are you smoking?" ”

She said that she hadn't had tea for dozens of minutes.