Xue Weidong opened his mouth, and wanted to say that I really forgot, but he also knew that if he really said that, he could only be embarrassed, so he smiled and patted the wing in front of him: "According to my experience, the use of this kind of wing of the aircraft can reduce the overall structural weight of the aircraft, so I don't understand the parameters you just said, why add a good wing that can reduce the total amount of structure, how can the take-off weight and load not be increased obviously?"

Although Xue Weidong didn't listen to Zheng Quanli's words much, he still had a general impression, so as soon as these words came out, Zheng Quanli was also dumbfounded, and said in his heart that this guy was enough chicken thief, obviously he didn't take what he just said to heart, but he just came to such a hand, not to mention, he was stunned and couldn't help it.

This question is so professional that Zheng Quanli can't answer it when he knocks his head, and when he is thinking about how to deal with it, a familiar voice comes from behind him: "That's because our wings are not very mature, but according to the preliminary wind tunnel test data, combined with our Ty2 UAV platform, a verification aircraft with a test nature, after all, the Xingzhou troops require a certain endurance time at high altitude."

Although our wing is not yet mature, it has somewhat reduced the total amount of structure, increased oil load, and the advantages of supercritical wing in lift and unique economy, which meets the basic needs of the troops, but after all, it is a test nature of the verification aircraft, so we call this aircraft TY2PLUS, otherwise it will be named TY3 UAV. ”

Suddenly a person came over, not only did he not wear a military uniform, but he also looked very young, Xue Weidong was very surprised, he looked at the person suspiciously, and then turned his head and was about to ask Zheng Quanli who was coming, when he saw that the young man in the white shirt suddenly stretched out his hand to himself, and introduced himself enthusiastically: "Hello, I am the person in charge of Tengfei Factory, Zhuang Jianye, presumably you are the leader of the Aviation Surveying and Mapping Brigade, right?"

If the aerial survey brigade needs topographic mapping UAVs, I recommend using the more mature TY2 platform, after all, TY2PLUS is a special case, and the cost is expensive, if it is generally equipped, it is not cost-effective, the aviation survey and mapping team wants to have requirements in terms of endurance, we can choose for you to install a turbocharged engine imported from Sweden, so that under a load of 200 kilograms, our TY2 platform can reach 6 hours of endurance......"

Let's go~~~ Zhuang Jianye held Xue Weidong's hand and began to sell the ty2 drone of Tengfei Factory, and he could hear that Zheng Quanli in the back was directly supporting his forehead, and Xue Weidong in front was even more eyeballed, if there was no glasses in front of him, it was estimated that he might have jumped out.

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

"Uh...... Xiaozhuang, right?Your ty2......" was made by Zhuang Jianye's self-acquaintance, although Xue Weidong was a little confused, but after all, he was a person from the headquarters, and he had never seen any scene, and after the initial discomfort, he immediately regained his composure, so he quickly interrupted Zhuang Jianye's chatter and patted the drone next to him, but it was embarrassing for a while, because the name of the drone in front of him was very complicated, and Xue Weidong didn't remember it.

Zhuang Jianye reminded with a very discerning eye: "plus, ty2plus." ”

"Yes, Plath...... Hehe, 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, and I can see that you have obtained a lot of information abroad, but I don't know if you are taking the American route or the European route?"

Supercritical wing is an advanced wing airfoil that prevailed in Europe and the United States in the sixties, as we all know, the pressure on the surface of the aircraft is not the same, and the speed of sound of the air on the surface of the aircraft is also different, resulting in the flow rate of the air in these places is also different.

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

It's like swimming, the resistance encountered by the head and the upper hand is bound to be different, and the Mach number on the surface of the plane is also a truth.

In some places, the air flow accelerates, the pressure decreases, and the speed of sound decreases, and the Mach number becomes higher in this place, and vice versa, the Mach number will be lower.

In the process of continuous acceleration of the aircraft, the Mach number of these points will continue to increase, and the Mach number of the largest point will reach a critical value, which is the so-called critical Mach number.

In other words, the aircraft as a whole did not exceed the speed of sound, and there were already some points on the surface of the aircraft that exceeded the speed of sound.

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

At the end of the 60s, NASA found through wind tunnel tests of different wing airfoils that the first part of the wing to exceed the speed of sound is usually the curved surface on the upper surface of the wing.

The air flow is accelerated very quickly, the pressure is relatively small, the speed of sound is relatively small, and the Mach number is the largest in this place, so they proposed a more uniform distribution of speed and pressure without the obvious curvature of the general airfoil.

The head and tail have also been adjusted accordingly, the head is smoother, the tail is sharper, not to mention, there is a recessed part of the lower edge, so the purpose of this design is nothing more than to make the air pressure on the upper and lower surfaces more uniform.

In this way, the supercritical wing can gain greater speed without exceeding the speed of sound, and with speed, the economy will naturally be very good, and the total structure of the aircraft will be reduced accordingly, so that it can not only be farther but also carry more cargo or weapons at the same weight.

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, loading more, and low fuel consumption is always the goal pursued by civil airliners, and the supercritical wing fully meets the needs of this aspect.

So since the 80s, European Airbus took the lead in applying supercritical wings to A300 passenger aircraft, Boeing, McDonnell Douglas, and Lockheed followed, and soon European and American civil airliners swept the international market with more economical fuel consumption and larger loads, and the Soviet civil airliners who intended to enter the field to get a piece of the pie were pressed underneath, thus establishing the monopoly position of Europe and the United States in the field of large civil airliners.

Of course, while Europe and the United States jointly suppressed the Soviet civil airliner, the internal competition between each other was also very fierce, especially in the supercritical wing, although all the technology came from NASA, but after more than ten years of development, it has already formed the European route represented by Airbus, and the American route represented by Boeing.

That's why Xue Weidong asked, after all, the two routes have their own strengths, and Xue Weidong wants to know which one is used by Tengfei Factory?

Zhuang Jianye smiled brightly and proudly, and also patted the ty2plus in front of him: "We use the Chinese route." ”