Lin Feng's opening was like throwing out a depth charge, and the students below all fried the pot.

They look at me, I look at you, and they don't believe that mechs can fly at all.

Someone raised his hand and asked: "Professor Lin, let's not talk about tens of thousands of tons of mecha for the time being, thousands of tons of mecha flying into the sky, with the current level of science and technology, it will be difficult to do." ”

Other students agree with this statement, how can a big guy with thousands of tons fly?

Lin Feng smiled and said, "Before answering this question, I would like to ask a question, do some students know what is the current maximum rocket load?" ”

Zhang Xiaojiang immediately raised his hand, and Lin Feng nodded for him to answer.

"Mr. Lin, the largest launch vehicle at present is the Great Wall - V5 launch vehicle, with a carrying capacity of 3,300 tons."

Lin Feng nodded with satisfaction, motioned for Zhang Xiaojiang to sit down, and then said:

"If we can send 3,300 tons of rockets into the sky now, why can't we send thousands of tons of mechs into the sky?"

Everyone thought about it, and it seemed to be the truth, but they vaguely felt that something was wrong.

After a few seconds of silence, someone finally found the problem.

"Dr. Lin, the thrust of the launch vehicle is only longitudinal thrust, while the thrust of the mecha to the sky requires multi-directional thrust, in this case, if there is no flight balancer, it will affect the speed and direction of the mecha's flight, and it will also affect the actual combat effect of the mecha."

This student's question is very realistic and also grasps the key.

The rocket really only needs one-way thrust, it has only one goal, upward, upward, accelerating, accelerating ....

But mecha can't always be like a rocket, go all the way up, break through the cosmic speed, and rush to outer space.

Lin Feng motioned for the student to sit down, and then continued the lecture: "First of all, the mecha flight I am talking about is just a way to use flight as a means of transportation, not to let the mecha and the monster fight in the air. If in reality, if you want the mecha to fight monsters in the air like in the comics, it is completely impossible to achieve it at this stage, and you can't even do it if you want the mecha to stand still in the air. ”

"Secondly, it is true that the flight of a mecha cannot be the same as that of a rocket, it must consider the kinetic energy output direction of take-off, acceleration, deceleration, steering, landing and other actions. But for such considerations, the Y-20 transport aircraft has already shown us the way. ”

At this time, Lin Feng gave the students popular science again: "The Y-20 transport plane, with a take-off weight of 3,100 tons, is equal to the weight of some mechas, the only difference is that its volume is more than five times that of mechas. ”

"So in the future, when the mecha flies, it needs to start in terms of volume, after all, under the same weight, it is impossible to use light materials such as aluminum alloy to make the mecha become hollow foam, and such a mecha will go against the original design intention. Let the foam mecha and monsters fight is self-defeating. ”

"Therefore, the design of the future flying mecha needs to combine the advantages of both rockets and airplanes to create a mecha that can truly fly."

...............

Then, Lin Feng roughly described the prospects of the mecha, of course, this prospect is the prospect that may be realized in the near future under the current science and technology, not the kind of ethereal prospect that makes people feel very sci-fi when they hear it.

For four hours, Lin Feng's lips were chapped.

Finally, in the warm farewell applause of the students, Lin Feng left the podium.

I'm so thirsty.

This Cao Wenyan is really a real person, he said that he only needs a microphone, he really only prepared a microphone, and he didn't prepare a bottle of mineral water.

In fact, after Lin Feng got off the podium, Cao Wenyan looked at his chapped lips before he reacted.

Originally, he was going to wait for Lin Feng to come to power and bring him a bottle of water, but after listening to it, he was so engrossed that he forgot to give it away with the mineral water in his hand.

Now that the class is over, after Cao Wenyan reacted, he suddenly became worried.

Am I so confused? You won't offend Director Lin, right? Will he give a small report to General Lin?

Well, I also admit it when I make a small report, who makes myself inhospitable.

However, this Director Lin is worthy of being the boss of the defense organization, and his lecture is really good.

Seeing Lin Feng walking in front of him, Cao Wenyan smiled awkwardly and handed over the water: "Director Lin, on behalf of all the teachers and students of the school, thank you for this wonderful lecture!" ”

Gollum, Lin Feng drank half a bottle in one gulp, and then waved his hand: "It's nothing, this is what I should do!" Principal Cao, if there is nothing else, I will go back first. ”

"Director Lin has been talking all afternoon, and now it's dinner time, why don't we go to the Emperor's Restaurant for a few drinks?"

"Don't, don't!" Lin Feng waved his hand again and again, he now has a phobia about eating in restaurants, and if he can't figure out this Cao Wenyan, he will learn from Zhao Yong and introduce himself to a daughter-in-law for nothing.

So he subconsciously refused: "My company still has something, so I won't trouble Principal Cao!" I'll go first! ”

"Okay, I'll send you!"

...........

In the auditorium, when Lin Feng stepped off the podium and entered the backstage, after the executive director spoke, the students' emotions were obviously much lower than before.

"After the meeting is adjourned, everyone leaves their seats in turn, and do not crowd ....."

But at this time, Zhang Xiaojiang put the notebook on Liu Xin, left his seat in the blink of an eye, and ran towards the door of the auditorium.

After running a few meters, his voice came back: "Liu Xin, help me keep it, I have something urgent!" ”

"Zhang Xiaojiang, what are you doing?"

However, before Zhang Xiaojiang could answer, the person had already run to the door of the auditorium, and only heard the angry voice of the executive teaching director.

"That classmate, please consciously obey the order, I haven't said ..... the meeting yet"

.......

After saying goodbye to Cao Wenyan at the school gate, Lin Feng was getting up to go back to the company, but he didn't want a student to rush out despite the obstruction of the security guards at the gate.

"Teacher Lin, wait a minute!"

"Huh?" Lin Feng turned around, but saw Zhang Xiaojiang chasing after him.

He ran up to Lin Feng and gasped for air.

"So it's you? Do you want to ask about your cousin? ”

Zhang Xiaojiang shook his head and breathed a sigh of relief: "No, I know the cause and effect of my cousin's incident, no wonder anyone." I chased it out because I wanted to ask Mr. Lin, can you accept me as your student? ”

Student? Lin Feng was slightly surprised, he really thought about teaching students, and the teaching director was all attached to him.

However, judging from the two contacts with Zhang Xiaojiang, Lin Feng admires him in some small details.

Have ideas, have brains, are willing to study, are down-to-earth and serious, and love mechas.

It seems that it is quite good to accept such a student.

Lin Feng smiled and said, "Want to be my student?" But I am very demanding in accepting students.

If you can finish all the textbooks of the mecha university within half a year and lay a good foundation, you can come to the small wind mecha construction company to find me. ”

Half a year, dozens of textbooks, want to learn all of them, for a student who has just entered college and has no knowledge accumulation, it is undoubtedly more difficult than climbing to the sky.

This is also a test for Zhang Xiaojiang by Lin Feng.

But when I heard Zhang Xiaojiang's ears, the taste changed.

He thinks that Lin Feng is urging him to lay a good foundation, and only when the foundation is laid can he apprentice.

It's like a primary school student who wants to directly apprentice to a university professor, but it's impossible, and he can't let a university professor teach him a ninety-nine multiplication table.

"Hmm!" Zhang Xiaojiang nodded seriously, "Teacher Lin, I will definitely be able to finish all the textbooks within half a year!" ”

Lin Feng smiled and encouraged: "Okay, if you really complete the task after half a year, I will definitely accept you as a student, not only to teach you mecha manufacturing, but also to teach you other things."

Okay, it's not too early, let's go back, goodbye! ”

"Goodbye!" Zhang Xiaojiang beckoned, and after seeing Lin Feng leave, the moment he turned around, his eyes were full of determination.