As the morning horn sounded, the brother and sister also ended their sleep. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 info On this day, neither of them had the idea of lying in bed, and the genius Meng Mengliang soldiers began to run and exercise, and the two of them got up and washed up without slacking off, because this day was the day of the aircraft experiment.

Labor Day is coming soon, and the company will have a holiday as usual, and heavy rewards will be given to those who are willing to work overtime. Daming really doesn't have to think too much about the company's affairs, and the relevant personnel will take care of the company's daily operations well enough.

"If something goes wrong with this experiment, we'll probably stay here this Labor Day." Da Ming said while wiping his face.

"There shouldn't be anything out of the ordinary, especially the aluminum alloy model."

After all, I also participated in the design and manufacture of my own, and I am very confident.

The exterior material of the two drones, one is a decent aluminum alloy, and the other is an engineering plastic. The aluminium alloy here is superduralumin, which is the main force part, which can ensure the strength of the aircraft in supersonic conditions, and the skin of the wing is duralumin. The material given by the old engineer is very reliable, it weighs slightly but has decades of human aerospace technology.

Of course, star fruit wanted to make something fresh, so she set her sights on aerospace materials. The most important wing frame is still aluminum, and the skin is PEEK.

Carambola took a sip of tap water and then protruded a mouthful of foam, took a toothbrush and said directly: "In order to build this plane, your wife and I have made something fresh." The material of my drone is particularly strong, polyetheretherketone, high temperature resistance, good mechanical properties, corrosion and wear resistance. In combination with fiberglass, I think the material for the wings and fuselage is very good. ”

"This thing is so good?"

"It's good, it's just that these special materials are too expensive. In addition to polyetheretherketone resin, I also use glass fiber reinforced phenolic resin, epoxy resin and other materials. Besides, this polyetheretherketone PEEK, if it weren't for the relationship between our mother's family and the arsenal, I wouldn't be able to get these, after all, there are very few factories in our country that produce these high-end composite materials. ”

Our mother, she mentioned our mother. Daming couldn't understand this large number of chemicals, so he heard the word "mom", which was really warm in his heart. "And how much does this plane cost?" He continued.

"Anyway, it's just very high."

Da Ming didn't ask any more, anyway, he now has enough spare money for his sister to engage in development. According to the plan, as long as the drone is successful, it will be used as a new product of the company, anyway, it is to sell arms, this thing can do a good job of remote control for hundreds of kilometers, and perhaps the Russian army is the largest buyer.

Inside the wind tunnel, two aircraft models are ready. Early in the morning, Fu Pengju and the accompanying experts began to carry out the final debugging of the aircraft model.

By design, both aircraft have a maximum cruising radius of more than five hundred kilometers, and the radio signal is too weak at any distance. The powerful piston engine is enough for the aircraft to fly for four hours at 600 kilometers per hour, and in addition to direct fire delivery, it is also very good as a reconnaissance aircraft.

Fu Pengju stood in the wind tunnel and patted his results at the end, these two large models were not equipped with "internal organs", but only installed the same weight of mounts for normal simulation. Models of bombs and missiles were also mounted on the wings, and everything was to simulate normal flight.

The siblings came to this huge wind tunnel, and the huge fan generated 600 kilometers per hour of strong winds, and everyone looked very small under the huge impeller.

The person in charge shouted that when the iron gate was closed, only the plane would be left in the wind tunnel, and the others could only look through the window.

"So how do you spot anomalies in airplanes? Is it just through our naked eyes? Da Ming asked suddenly.

Fu Pengju smiled and said: "That's a good question, the wind will add smoke for a while, there will be cameras to record everything that happens, and we can see the air flow." ”

The airflow was steady during the plane's normal cruise, and soon the experiment began, with the huge fan turning and the smoke generator working.

"If it's not well designed, the wind can just blow the plane away." Fu Pengju added another explanation, which made Daming suddenly a little nervous, after all, it was his sister who made it with his hard work. He glanced at the star fruit, the confidence on this girl's face, maybe she was worried.

It takes a while to get the huge fan spinning at high speed, and the staff reports the instant wind speed at a glance. About ten minutes later, the wind reached 620 kilometers per second, which was already six times that of a Category 17 typhoon, and even the elephants were blown away, and both aircraft models were waiting unharmed.

Star fruit stared wide, and the smoke through the wingtips of the wings was clear in the vortex that was stable and proved that both planes were normal. "It's like the plane cruising, it doesn't flutter from side to side, and so far there is no problem with the wind tunnel experiment."

Fu Pengju said: "By now, everyone can basically rest assured, and the next thing we have to do is a test flight experiment." ”

The results of the wind tunnel experiments were satisfactory, the electricity bill was a lot of money, but everything was worth it. Carambola is very happy that the composite material he requested has no abnormality under the high-strength wind pressure, and the most worrying fuselage fracture has not occurred at high speed, and no cracks have been found after ultrasonic resonance. Such a good result may be really overkill, and maybe it would be good to raise the drone to the supersonic level.

At that time, I thought about it, but it was better to fly slowly and be a high-altitude reconnaissance plane.

The brother and sister returned to the company with their baby, and the research on drones will continue, and May Day is quietly coming.

Now there is no need to keep the drone too secret, and on the last day of April, the two suddenly returned to school.

The warmth of the classmates was very warm, but in addition to the greetings, everyone also had a little worry about the two of them's studies. Even if you are a genius, if you don't read books, you will drop your homework, not to mention that the two of them missed a lot of exams.

"It's hot after Labor Day, and it's the final exam in June, and I still hope that you will take time out of your busy schedule to come to school to do it, after all, the school also has requirements." Head teacher Hao Ren said.

This sounds harsh, Daming and star fruit don't want to defend themselves, it is true that their performance as students is not good, and they often leave school as if they were suspended.

"Okay, I'll try." Sister of the Ming Dynasty.

So that night, the two were willing to stay and spend an evening of self-study to experience Lang Lang Scholar. Many of the students in the class have already left school in the afternoon, and most of the rural children still have to go home during the precious holidays, and take the thick quilts home by the way.

Cheng Manxiu didn't leave, she and her parents and brother lived in her sister's house. Now that her benefactor is back, she has a thousand words to say to Da Ming, and this night's self-study has suddenly become a "symposium".

"If I could, I would have liked to go to Russia and see my sister and see how she was doing."

Star fruit said: "She's doing well, and she already has a boyfriend." I estimate that in a few years, Sister Manxiu will be an aunt. ”

Cheng Manxiu was taken aback, and she was stunned for a while before she came to her senses. My sister has a boyfriend, and I have to tell my family about it, but will it cause any more turmoil if I tell them? She asked weakly: "That boy, does he really like his sister?" ”

Carambola nodded vigorously: "Of course, that man is not bad, just wait for you to meet him in Russia." The implication of this is to let Cheng Manxiu also go abroad, if it is a summer vacation, it is indeed okay to go abroad, and the star fruit casually said that she would be a guest.

Cheng Manxiu was very happy, and then talked about how to spend the Labor Day holiday.

As a high school student, if you want to be admitted to university, you have to work overtime to study, and the high-intensity study makes this girl a little unbearable. Da Ming suggests taking a break once in a while to relax and unexpectedly help with learning. Therefore, Daming decided to invite Cheng Manxiu to go to the company to see the first test flight of the drone.