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Chapter 213 China Route

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    Xue Weidong opened his mouth and wanted to say that I really forgot, but he also knew that if he really said that, he would be the only one who would be embarrassed, so he laughed and patted the wing in front of him: "Based on my experience,  An aircraft using this kind of wing can reduce the overall structural weight of the aircraft. So, I don¡¯t understand the parameters you just mentioned. Why add a good wing that can reduce the total structural weight? How can the take-off weight and load be increased?  Isn¡¯t it obvious?¡±

    Although Xue Weidong didn't listen to Zheng Quanli's words very much, he still had a general impression, so when these words came out, Zheng Quanli was also dumbfounded, thinking that this guy is quite a thief. He obviously didn't take what he just said to his heart, but he still did such a trick.  Don't tell me, I can't help it.

    This question was so professional that Zheng Quanli couldn¡¯t answer it even if he broke his head. Just when he was thinking about how to deal with it, a familiar voice came from behind him: ¡°That¡¯s because our wings are not very mature yet. We just follow the preliminary instructions.¡±  The wind tunnel test data is combined with an experimental verification aircraft developed by our ty-2 UAV platform. After all, the Xingzhou Army requires a certain endurance time at high altitudes.

    Although our wings are still immature, they have somewhat reduced the total structural weight and increased the fuel load. Coupled with the supercritical wing's advantages in lift and unique economy, this can meet the basic needs of the troops. But in the end  It is an experimental verification aircraft, so we called this aircraft ty-2plus, otherwise it would be named ty-3 drone.  "

    Suddenly, a person appeared. Not only was he not wearing a military uniform, but he also looked very young. Xue Weidong was very surprised. He looked at the person suspiciously for a few times, then turned his head and was about to ask Zheng Quanli who the person was when he saw that person.  The young man wearing a white Doliang shirt suddenly reached out to him and introduced himself enthusiastically: "Hello, I am the person in charge of Tengfei Factory, Zhuang Jianye, I must be the leader of the aerial surveying and mapping brigade, right?

    If the aerial surveying and mapping brigade needs drones for terrain surveying and mapping, I recommend using the more mature ty-2 platform. After all, the ty-2plus is a special case and is expensive. It is not cost-effective if it is universally equipped. The aerial surveying and mapping brigade wants to improve the battery life.  If you have any requirements, we can choose a turbocharged engine imported from Sweden for you, so that under a load of 200 kilograms, our ty-2 platform can achieve a battery life of 6 hours"

    Bah bah bah~~ Zhuang Jianye held Xue Weidong's hand and began to promote the ty-2 drone from Tengfei Factory. Zheng Quanli in the back was holding his forehead. As for Xue Weidong in front, his eyes were wide open. If not  The spectacle lenses in the front are blocking it, and they may pop out.

    Why did you start selling products to yourself?  Wait, are we familiar?

    "Um Xiaozhuang, right? Your ty-2" Although Xue Weidong was a little confused by Zhuang Jianye's familiarity, he was a person from the headquarters after all. He had never seen anything before. In the early days,  After not adapting, he immediately regained his composure, so he quickly interrupted Zhuang Jianye's chatter and patted the drone next to him. However, he felt embarrassed again because the name of the drone in front of him was very complicated, and Xue Weidong didn't even remember it.

    Zhuang Jianye reminded with great discernment: "plus, ty¡ª2plus."

    "Yes, Plath Haha, the name is very special, but it has the potential to be in line with international standards, just like the supercritical wing you use. This is the first time I have seen it in China. I can see that you are  I have obtained a lot of information from abroad, but I don¡¯t know whether you are taking the American route or the European route?¡±

    The supercritical wing is an advanced airfoil that was popular in Europe and the United States in the 1960s. As we all know, the pressure is different everywhere on the surface of the aircraft, and the speed of sound of the air on the surface of the aircraft is also different, resulting in the airflow in these places.  Flow rates also vary.

    In other words, the Mach number of the airflow everywhere on the aircraft surface is not a fixed value.

    This is like swimming. The resistance encountered by the head and the upper hand must be different. The Mach number on the surface of the aircraft is also the same.

    In some places, the airflow accelerates, the pressure becomes smaller, and the speed of sound also becomes smaller. The Mach number in this place becomes higher. On the contrary, the Mach number will be lower.

    As the aircraft continues to accelerate, the Mach numbers of these points will continue to increase together. At the point with the largest Mach number, the Mach number reaches a critical value, which is the so-called critical Mach number.

    In other words, the aircraft as a whole does not exceed the speed of sound, but the surface of the aircraft has already exceeded the speed of sound at some points.

    At this time, something called shock wave resistance will be produced on the surface of the aircraft, which will consume the power of the aircraft and affect the speed and endurance of the aircraft.

    The supercritical wing came into being to solve this problem. In the late 1960s, NASA discovered through wind tunnel tests of different wing airfoils that the first part of the aircraft wing to exceed the speed of sound is usually the wing.  That surface??A curved surface.

    The airflow in this place is accelerated very fast, the pressure is relatively small, and the speed of sound is also relatively small. The Mach number here is the largest, so they proposed an airfoil that does not have the obvious curvature of the general airfoil to make the speed and pressure distribution more even.  .

    The head and tail have also been adjusted accordingly. The head is smoother and the tail is sharper. There is also a concave part on the lower edge. The purpose of this design is nothing more than to increase the airflow pressure on the upper and lower surfaces.  all become more even.

    In this way, the supercritical wing can achieve greater speed without exceeding the speed of sound. With speed, the economy will naturally be very good, and the total structural weight of the aircraft will be reduced accordingly, so that the aircraft can fly at the same weight.  In this case, not only does it have to go farther, it can also carry more cargo or weapons.

    Therefore, as soon as the supercritical wing appeared, it was sought after by European and American aviation giants, especially in the field of civil aviation. Flying farther, carrying more equipment, and low fuel consumption are always the goals pursued by civil aviation airliners, and supercritical wings fully meet these goals.  needs in this regard.

    So starting in the 1980s, Airbus in Europe took the lead in applying supercritical wings on the A300 passenger aircraft. Boeing, McDonnell Douglas, and Lockheed followed suit. Soon European and American civilian airliners were able to use more economical fuel consumption and larger  The load of the aircraft swept across the international market, suppressing Soviet civilian airliners that wanted to enter the field to get a share of the pie, thus establishing the monopoly of Europe and the United States in the field of large civil aviation aircraft.

    Of course, while Europe and the United States jointly suppressed Soviet civil aviation, the internal competition between each other was also very fierce, especially on supercritical wings. Although all technologies came from NASA, after more than ten years of development,  The European route represented by Airbus and the American route represented by Boeing have already been formed.

    That¡¯s why Xue Weidong asked this question. After all, the two routes have their own advantages. Xue Weidong wanted to know which one was used by Tengfei Factory?

    Zhuang Jianye smiled brightly and proudly at this, and also patted the ty-2plus in front of him: "We are using the Chinese route."

    If you like Soar My Aviation Age, please collect it: Soar My Aviation Age is updated the fastest.  (Remember the website address: www.hlnovel.com
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