A week later, Xia Yu came to Beijing by plane, because Yuan Limin sent someone to pick him up, so Xia Yu was pulled directly to the Aerospace Power Technology Research Institute after getting off the plane, and as soon as he got off the car, he saw Yuan Limin standing in front of a white building waiting for him, Xia Yu was a little flattered. This Yuan Limin is the head of this research group, why does he always feel so idle as if he has nothing to do?

"Comrade Xiaoxia, welcome, welcome." As soon as Xia Yu got out of the car, Yuan Limin stepped forward, the reason why he was so enthusiastic was mainly because he was inspired by a conversation with Xia Yu when he was on the plane, and he always wanted to do it according to Xia Yu's idea, but before Xia Yu's consent, Yuan Limin did not have an actual trial production, but did many simulations on the computer.

Although it is more convenient for him to directly encroach on Xia Yu's idea, he has never encroached on other people's achievements after a lifetime of research, so although what Xia Yu said is just an idea, and the actual research results are completely different things, Yuan Limin still feels that Xia Yu's consent can only really start, of course, it would be better if Xia Yu could also participate in the research together.

"Oh, old Yuan." Xia Yu greeted casually, he felt that he was very close to Yuan Limin, so he didn't have so many politeness, but a younger person next to Yuan Limin looked at Xia Yu in surprise, guessing the relationship between Xia Yu and Yuan Limin.

"Come on, I'm tired of sitting on the plane for so long." Lao Yuan was so enthusiastic that he wanted to help Xia Yu get his luggage, which scared Xia Yu a lot, and quickly stopped Yuan Limin and said: "Hey, Lao Yuan, don't come here, let you take your luggage, I'm going to be struck by lightning." ”

Yuan Limin smiled, touched his bright white hair and said with a smile: "That's okay, in order to prevent you from being struck by lightning, you can take the luggage yourself, and I'll let someone help you send the luggage to the hotel later, you come in with me first." ”

Without waiting for Xia Yu to respond, he took Xia Yu's hand and walked to the building, handing Xia Yu a badge as he walked, Xia Yu took it and took a look, yo, it was actually his own entry and exit ID, Xia Yu was happy, and asked with a smile: "Old Yuan, when did you even get my temporary access ID?" ”

"I knew you were coming, so I would have it done for you a few days earlier." Yuan Limin said: "If there is no ID in this building, even I can't bring you in, you just put your luggage here, come with me to the real room first, oh, by the way, your ID is not temporary." ”

"Not temporary?" Xia Yu was confused, although the aerospace department is directly under the State Commission of Science and Technology, but it is also under the control of the Air Force, Xia Yu, as a member of the Air Force test flight force, the first thing he has to do after coming to the new department is to report to the relevant department leaders, how can he get the certified identity ID in a scientific research department inexplicably, which almost means that he is a member of this scientific research department.

"I said Lao Yuan, you're not mistaken, right?" Xia Yu shook the ID in his hand and said, "If it's not temporary, then I won't become a member of your research institute?" ”

"Yes, your current identity is my research assistant, of course someone from our research institute." Yuan Limin's face was taken for granted.

Xia Yu began to have a headache, and said with a wry smile: "Aren't I here to be a test pilot?" How did you suddenly become your research assistant? ”

"You're also a test pilot, yes, you can come and see with me." After Lao Yuan finished speaking, he took Xia Yu on a sightseeing tram and drove around the institute in the depths.

Along the way, there are as many as a dozen sentry posts that need to stop and verify their identities, not to mention the various surveillance probes that you can definitely see as long as you look up.

"Alright, here it is." The sightseeing tram was driven into a place similar to an underground parking lot by Yuan Limin, and after the two were checked and released by the sentry again, Xia Yu followed Yuan Limin to a silver alloy gate, Yuan Limin inserted his ID card and entered the password, and the alloy gate automatically opened slowly, and the electric lights inside were also automatically lit.

Xia Yu and Yuan Limin stood on a step, the alloy gate behind them slowly closed automatically, at a glance, this is a huge rectangular underground workshop nearly 100 meters wide, various mechanical arms are arranged on both sides of a track in the middle of the workshop, at one end of the warehouse, a large aircraft with no hanging tail, silver-white coating, almost flat large delta wing stands there quietly.

"This is our technology verification aircraft, the Shenlong manned aerospace aircraft." Yuan Limin said proudly.

"Oh, that's pretty impressive." Xia Yu sighed, and then asked, "Can I take a closer look?" ”

"Absolutely." Yuan Limin nodded and began to lead Xia Yu.

Approaching the huge flying machine, Xia Yu first carefully observed it in the nose of the aircraft. The nose of this aircraft is flattened, with a sharp edge-like edge that streamlines all the way to the rear half of the wing, and the cockpit glass window is similar to that of an airliner, but the inclination seems to be more than 45 degrees, which can be seen as a design to reduce air resistance. And the overall blackened glass should also have been treated with high temperature resistance, after all, this guy has to go back and forth to the atmosphere many times, and the temperature of up to one or two thousand is also a huge challenge to the thermal resistance of the body.

Touching the belly of the machine with his hand, the cold metallic texture was conveyed to his hand, Xia Yu turned his head and asked, "This guy won't have to be covered with a layer of heat insulation tiles when he can't take off, right?" ”

"Of course not." Very satisfied with Xia Yu's question, as the general person in charge of the Shenlong project, this is one of his most proud inventions, Yuan Limin couldn't hide the pride in his eyes, pointed to the next place in the belly, and said with the corners of his mouth: "When the atmosphere re-enters, these nozzles under the belly of the machine will be evenly covered with a layer of heat insulation glue within a square meter of the surrounding area, this layer of heat insulation will form a better thermal insulation effect than the heat insulation tile in the descent process, and will eventually be burned off by the atmosphere instead of the heat insulation tile, and only need a simple cleaning after landing, It can be lifted off again quickly, which is much more convenient and faster than the insulation tile needs to be replaced every time. ”

"That's true." Xia Yu nodded in agreement, when the aircraft returns to the earth from outer space, due to its ultra-hypersonic characteristics, it will have violent friction with the atmosphere, which will produce high temperature and high heat like a meteorite falling to the earth.

For example, the space shuttle Columbia in the United States, the foam installed on the rocket fell off and hit the space shuttle during takeoff, and the left wing of the plane was knocked into a small hole, but it was not found at the time, but when the space shuttle returned to the earth and passed through the atmosphere, because of the violent friction, the air up to 1400 degrees Celsius rushed into the left wing from the breach, melting the internal structure, and finally causing the wing and the body to melt, leading to the crash of the space shuttle Columbia.

Removing his hand from under the cold belly, Xia Yu looked at the landing gear and then moved his gaze to the back of the body.