As soon as he finished saying this, even a few roommates who were very familiar with Sun Cheng also felt that he might have hormones, and the cowhide was about to blow into the sky. Pen "Fun" Pavilion www.biquge.info

No, An Bin coughed and said, "You, don't always say something that we laymen can't understand!" ”

After speaking, he didn't forget to push him, and took advantage of the moment Sun Cheng turned his face to give him a hint in his eyes.

With a slight frown on his brows, Sun Cheng immediately noticed the change in the atmosphere in the room, he was not a fool at all, and after thinking about it, he guessed that it was estimated that the eyes of most people looking at him had changed.

"Am I talking about it?"

Muttering in his heart, Sun Cheng shook his head secretly, but did not continue.

Everyone knows that it is much more difficult to build an airplane than a car, and in the same way, as a kind of aircraft, the requirements for technology and equipment for the production and manufacturing of helicopters are certainly not low.

This is actually a false proposition, because as Sun Cheng just said, helicopters are also divided into three or five grades.

Without further ado, let's take the 400-kilogram single-seat small helicopter he just mentioned as an example.

The structure of this entry-level small single-seater helicopter is actually very simple, nothing more than the rotor system, the fuselage, avionics, seats, built-in fuel tanks, landing gear and engines.

In addition to the fuselage, built-in fuel tank and avionics system, other parts can be directly ordered in this era of highly developed international trade, and the difficulty of assembling such a helicopter is not much more difficult than assembling a car.

What's more, in the past few days, as Sun Cheng has continued to explore and gain his newly acquired abilities, his current confidence has been slightly catalyzed by the alcohol in his stomach, and he is suddenly a little explosive!

Xu saw that he didn't continue to have a big mouth, An Bin stood up with a smile, didn't care about Jiang Yu's cold eyes on one side, his eyes fell on Limi from time to time, and said: "The ancients are destined to meet thousands of miles away, but they don't meet on the other side. It is also a beautiful thing to meet all of you today, and in the coming period, because of the cooperation between the two universities, we will have more opportunities to have in-depth exchanges, show each other and further deepen our understanding, and some of us may build deeper bonds because of this, and we are looking forward to this day. ”

"If the hospitality is not good, please bear with me. It's not early, we were fortunate to have a lot of girls today, and for safety reasons, it's almost time to end the show! Glancing at the time on his watch, he raised his glass high, "Come, let's drink this!" ”

"Cheers!"

Silent and raised his glass with everyone, Sun Cheng raised his head and poured a full glass of beer, he already felt the estrangement between himself in this social situation, I am afraid that he will not participate in it a second time in the future.

The dinner party was quickly dispersed!

Knowing that Qi Wei was living alone in a rented house outside the school, the eldest and the third child were stubbornly sticky, but they didn't expect the girl to really nod and let them take a taxi to send her back, an unexpected ending.

An Bin seems to really fall in love with the girl named Limi, and he doesn't even care about the two outreach girls he brought, you must know that he will definitely not do such a rude thing in ordinary times, even if he doesn't send it downstairs in the dormitory in person, at least he will send it to school.

As soon as he saw that after settling the account, he stuck to Limi, completely ignoring Jiang Yu's increasingly ugly face, as if he wanted to send her back.

Sun Cheng had no choice but to say hello to him and took over the job of sending the two outreach girls back.

"It's not far from campus, why don't we take a walk back?"

Haoleju was really not a few steps away from the central campus where the two outreach girls were, and considering this, Sun Cheng simply took the initiative to propose a walk back.

"Okay, it's not a long way to go anyway!"

The girl who readily agreed was called Lin Ying, not to mention her appearance, not to mention that compared with Limi, Qi Wei, the tiger tooth girl of the National Academy, was more beautiful than her.

However, Lin Ying has big watery eyes, her appearance is clean and delicate, and she seems to be quite good at makeup.

Because this girl is often asked out by An Bin to have dinner with a few buddies in the dormitory, for a period of time last year, Sun Cheng always felt that she was in a relationship with the fourth child.

Sun Cheng, another outreach girl named Liu Lili, is not very familiar with her, and vaguely remembers meeting An Bin a few times when she went to the student union.

However, this girl has been secretly looking at Sun Cheng since he took over the job of sending the two of them back just now, which made him uncomfortable for a while.

Just as they wanted to ask what the situation was, the three of them walked to an intersection and the red light was on, so they had to stop and wait for the green light, but Sun Cheng didn't expect that this girl would be the first to open her mouth and talk to him.

"I heard from the minister, senior, didn't you go to the graduate school for an internship? The internship isn't over yet, right? How did you get back? ”

Sun Cheng was stunned, but he didn't expect this girl to come up and ask here, he thought about it and felt that there was no need to hide it, so he replied directly: "During the thunderstorm a few days ago, I was electrocuted and fainted due to improper operation in the research institute, and when I woke up, I was notified that I had caused some losses to the research institute, and I was kicked back after the internship agreement was terminated!" ”

After a few glasses of wine, Sun Cheng could be regarded as thinking about it, no matter who was behind this fanning the flames and wanted to see his own jokes, he couldn't let the other party be proud anymore.

Didn't the other party hack himself vigorously on the school forum?

Come on, he's going to make a statement directly when he goes back, didn't you say that I was electrocuted and caused losses to the research institute, okay, can't we admit it?

However, someone has to put the pot that affects the relationship between the institute and the school on him, Sun Cheng said, the baby is still young, we just don't carry this pot.

As for the consequences, in fact, if you think about it, it doesn't seem to have changed much.

Anyway, the research institute has terminated the internship contract with him, will there be leaders who take a fancy to their backbone and recruit them back?

Or maybe he pretended not to know, and the group of college monks in the school who had nowhere to vent their energy would not continue to scold him?

As for whether there will be no other research institutions willing to accept him if his reputation is bad in the future, Sun Cheng has no pressure.

Today, he has made some gains in his first research on the operating system, and he has already considered further improving the domestic operating system, but he is ready to test the waters and develop in the field of the Internet.

No wonder people say that crying children have candy to eat.

No, as soon as he mentioned that he was kicked back by the research institute because of an electric shock, the eyes that looked at him immediately brought a little sympathy.

Liu Lili may also feel that she has asked an embarrassing topic, and after a moment of silence, she quickly took the initiative to talk to him again, but this time she turned the topic in other directions.

"I heard you mention at the dinner party that you can assemble a helicopter yourself?"

Smiling slightly, Sun Cheng nodded.

"I just admitted that I have the ability to assemble a 400-kilogram ultra-small helicopter, because the technical content of this type of helicopter is not high, and almost most of the parts, including the engine and avionics system, can be bought directly, so many foreign enthusiasts like to buy parts in person, and DIY a single-seat small helicopter!"

"What is DIY?" Lin Ying asked curiously.

"DIY is the English abbreviation of 'DoItYourself', some people think that it originated from the do-it-yourself computer that has only become popular in recent years, and some people say that it originated from the assembly of model airplanes games decades ago, of course, the origin of the debate is a topic that can easily cause contradictions among fanatics, you just need to know that DIY is a sharing life model that has developed very hot on the Internet in recent years."

After a pause, he quickly changed the topic again: "However, even if you can procure parts to assemble it, even if you get a small single-seat helicopter of 400 kilograms, the cost is estimated to be no less than 200,000 yuan!" ”

There is no doubt that helicopters are expensive to produce, even for an entry-level small helicopter of 400 kilograms.

If you don't have the luxury of installing any leather seats, the cost of strict control is actually only a few hundred yuan.

The built-in fuel tank, although it needs to be specially designed, will never exceed a thousand.

The take-off and landing of small helicopters are straight up and down, and there is no need to taxi, so the landing gear only needs to be strong and wear-resistant, and there can be no more than 2,000.

This entry-level avionics system can be done within 10,000 yuan, of course, considering signal transmission, endurance and safety, this procurement cost probably has some room to rise.

No one will take a 400-kilogram single-seat small helicopter as a military aircraft, so its body does not need to be designed to resist crashes, not to mention bullet damage, as long as there is a certain strength, the most important thing is that it must be light enough, although the use of aluminum alloy is not as good as various composite materials in terms of function, but it can control the cost below 20,000, and it depends on how dark the manufacturer's heart is.

For small helicopters, the core and most expensive parts are the rotor system and engine.

Because to ensure strength and a certain degree of flexibility, the main rotor and tail rotor need to be made of emerging composite materials such as carbon fiber and glass fiber reinforced plastic.

However, even if the former only needs a single-layer propeller, the cost will not be less than 20,000 yuan, and the tail rotor can be cheaper, and the direct purchase of finished products will cost several thousand yuan.

Fortunately, an aircraft of this level does not have high requirements for a stable gyroscope, but a rotor system will cost about 30,000 yuan, which is more expensive than the entire fuselage.

The engine is even more incredible, as the heart of the helicopter, it must have sufficient power to support hundreds of kilograms of weight to soar freely in the sky, and to purchase a qualified engine, such as the MZ202 engine that Sun Cheng obtained before the design plan to be purchased, its manufacturer, the Star Engine Company, quoted as high as 14,000 Canadian dollars four years ago, which is converted into more than 70,000 yuan in Daming currency.

Taking into account the wear and tear that may occur during the assembly and the cost of training, the cost of DIY a small single-seat helicopter of 400 kg is as high as 200,000 yuan.

It's not a long way, but it's also lively to walk and chat.

However, Sun Cheng obviously didn't have enough eyesight, as soon as he talked about the topics he was interested in, he was like being opened into a chatterbox, and he couldn't stop talking about helicopters all the way, and he didn't notice that the two girls in the same company occasionally interjected at first, and then they stopped asking questions and even walked faster, and after arriving at the campus, it was more like a sigh of relief, and they were busy saying goodbye to him.

Until the end, Sun Cheng obviously didn't realize this, passing by a computer store that had not yet closed, and after spending ten yuan to buy a CD of Beacon's 'Kirin 7.0' version of the operating system, he felt a little tired, he stopped a taxi, went straight to the South Campus, and returned to the dormitory in a few minutes.

Turning right out of the elevator, before the person approached the dormitory, he saw that the door of the dormitory was open, and it was obvious that someone had already returned before him.

couldn't help but speed up his pace, and as soon as he walked into the dormitory, Sun Cheng saw An Bin sitting in front of his computer smoking a cigarette at a glance.

"Hey, why did you come back so soon?"

As soon as the words came out, Sun Cheng realized that he had asked a nonsense question.

When I was leaving the scene just now, I saw the courteous appearance of the fourth child, obviously wanting to send the girl named Limi back.

Now that he came back sooner than himself, it goes without saying that he must have been rejected.

Sure enough, An Bin glanced at him angrily, "Aren't you talking nonsense?" I forgot to ask you just now, did you know that someone hacked you on the school forum? ”

"Hmm!"

Sun Cheng nodded, threw the newly bought software disc on the table, he immediately walked over and poured a glass of water for the fourth child by the way, brought it over and handed it to him, slowly drank the water and walked to his computer desk to turn on the computer, and there was no more change on his face.

An Bin held the water and looked at him with some surprise, "You're not angry at all?" It's clear on the forums that someone is trying to hack you! ”

"Is there a use in being angry? The people who hack me won't scold me less, let them go! ”

Sun Cheng had obviously seen it thoroughly, which made An Bin hesitate even more, and only after a while did he take a sip of water and continued: "But it's not appropriate to just let it go like this, otherwise, I'll talk to the Forum Club tomorrow!" ”

Although he felt that this was useless, the fourth child's concern still warmed his heart.

"Thanks!" Sun Cheng smiled at him gratefully, "Actually, I want you to do me another favor more than this!" ”

It just so happened that there were just the two of them in the bedroom now, and he was going to have a good chat with An Bin.