Listening to Ren Wencong's words, Xu Yuanchao couldn't help but pause, only then did he notice Ren Wencong standing behind Yang Hongyi, and immediately smiled, Ren Wencong, Xu Yuanchao is no stranger, since he was transferred to Wanshan Aviation Research Institute by the position of aviation staff officer of the Operations Department of the Navy Command, and served as the chief test pilot, he has been stationed at Wanshan Aviation Research Institute, so he is very familiar with Ren Wencong, who often comes here for technical exchanges, so after climbing out of the cockpit, he hurriedly stepped forward to say hello:

"It turns out that Chief Master Ren is also here, I really didn't expect to see you here!"

"I also came here to observe and learn, no, seeing your beautiful flight maneuvers just now, I felt that this time I really came to the right place, you are the hero of this test flight."

"Haha~~ Chief Engineer, you can pass the award, those few actions, how can I think of it with my elm head, they are all deconstructed by Mr. Lu and Director Yang with experimental data and theoretical equations, I am just responsible for completing it, so they are the real heroes!"

"Even if we can calculate it, it has to be implemented in practice, in the end, it has to rely on an excellent pilot like Xiao Xu to really fly out those boring theories, and finally complete the consummation, otherwise, even if you tie me and Jiadong to the plane together, it is estimated that you won't even move your wings, so if you fly well, you fly well, you don't need to be modest!"

Yang Hongyi said categorically, with irrepressible joy on his face, smiling brighter than ever, even with the zombie face that has not changed for a hundred years, it is not as incongruous as in the past, but shows the kindness and charity unique to an elderly man.

Seeing this, Ren Wencong, as a student, always felt that something was wrong, but he couldn't say it, after all, the chief designer of the seat J-9 was able to watch the fighter he designed himself travel in the sky without hindrance, and anyone would laugh, Yang Hongyi was no exception, but I don't know what was going on, Ren Wencong felt that something was different

"Wen Cong, what are you thinking?"

Just when Ren Wencong was thinking about what was wrong, the words of the teacher Yang Hongyi suddenly came to his ears, which made him a little flustered, and he didn't dare to tell the truth for a while, so he randomly found a reason, and replied hesitantly:

"I'm wondering if this time the J-9 can complete these unconventional maneuvers so perfectly, is it because of the change in the aerodynamic layout, which simplifies the programming of the control system?"

"Yes, my eyes are finally sharpening!"

Yang Hongyi didn't care about Ren Wencong's hesitation, but nodded with a satisfied smile and appreciated: "This is a bit of a chief engineer, that's right, it is precisely because of the improvement of the aerodynamic layout, so it can be simplified in the flight control software, you must know that although the duck~~ wing layout can provide enough lift for the fighter, but this layout has a fatal flaw, that is, it is difficult to grasp the problem of manipulation \ balance"

Yang Hongyi just started talking about the pale yellow J-9 in front of him, as the so-called duck ~~ wing, defeat also duck ~~ wing, Wanshan Aviation Research Institute's J-9 uses the duck ~~ wing aerodynamic layout, and indeed obtains a huge aerodynamic advantage, in the case of the engine thrust is not large, not only has excellent supersonic ability, but also has a strong advantage in low-altitude and low-speed performance,

However, as the saying goes, there are gains and losses, duck ~ ~ wing in the J-9 extremely maneuverable at the same time, but also the difficult handling of the J-9 to the developers of the brain, although in this regard, Yang Hongyi and Wei Hongkun headed by the experts of Wanshan Aviation Institute, has accumulated a lot of experience in the previous J-9 project;

But it is still far behind, because of the static unstable structure similar to the duck~~ wing layout, the previous accumulation is not sufficient, not to mention that with the dismount of the J-9 several times, the relevant research has been intermittent, and a completed theoretical system has not been formed, so even if it can be applied to the J-9, there is still a long way to go before it matures;

What's more, if you want to give full play to the advantages of the duck ~~ wing layout, it is far from enough to rely on the pneumatic shape alone, and you must work the control system in order to give full play to the effect of the duck ~ ~ wing layout, and the original mechanical-hydraulic control system not only does not meet the general requirements of the duck ~~ wing layout, but even the normal take-off and landing can not be realized;

Only the use of the world's most advanced fly-by-wire control system can meet this requirement, and this involves a large number of flight control software programming programs, not only need to complete a huge calculation in the laboratory, but also have to do thousands of practical tests on the technical verification machine, gradually correct the data, expand the performance envelope of the aircraft, even if it is the same duck ~ ~ wing layout of the aircraft, the control rate of different models is completely different, it is impossible to copy the original.

Because of this, even if Wanshan Airlines has the French fly-by-wire control system and its supporting flight control software, it still cannot be applied to the J-9, coupled with the lack of basic experience, the control rate of the flight control software has become an obstacle in front of Wanshan Airlines;

In fact, I don't know that China's J-9 encountered a bottleneck in this regard, and the Swedish "Gripen" fighter that began to be developed during the same period also encountered similar problems, but later, this military-industrial power located in Northern Europe ran to hug the thighs of the Americans, and finally after paying the country's military giant, Saab Company, 30 percent of the equity, in exchange for the flight control program written by Lockheed Martin in the United States, this sent the "Gripen" fighter to the blue sky!

Lu Jiadong refused to cooperate with the United States early on, so Wanshan Aviation can only rely on itself to solve this problem that the European military-industrial power cannot overcome, but the foundation of several decades can not catch up overnight, and the experience accumulated by several generations cannot be made up for in three or five years.

Wanshan Airlines is not working hard in this regard, but the huge gap is still like a chasm, blocking their progress, so that the previous prototype is always because of the flight control system, unimaginable dangers, for this reason, Wanshan Airlines learned from the pain.

Especially after Lu Jiadong set the military order in front of the high-level, he was forced to the corner of the Wanshan Aviation Institute, and burst out with amazing creativity, since the duck ~~ wing layout is difficult to control in terms of manipulation \ trim, resulting in difficulty in software programming, then simply reduce the role of the duck ~~ wing layout and reduce manipulation \ In terms of trimming, it only serves as a vortex generator to provide sufficient lift for the main wing of the fighter, so that the handling programming is greatly simplified, and the result is that today's excellent fighter can perform extraordinary flight maneuvers

"It turns out that this is the case, the software is still the previous software, and even simplified, but it has made great efforts in aerodynamics, elongated the edge of the nose, and perfectly integrated with the duck ~~ wing and the triangle ~~ wing behind it, forming an overall upward lifting of the aerodynamic shape, so as to reduce the effectiveness of the duck ~~ wing in the control \ trim, this way of promoting strengths and avoiding weaknesses, powerful, powerful, really powerful"

After listening to Yang Hongyi's introduction, Ren Wencong looked at the Jian-H 9 in front of him and nodded his head incessantly, and praised Zeng again and again, and Xu Yuanchao, who was standing next to him, also smiled and spoke:

"Chief Master Ren, you see, if it weren't for the thinking and busyness of Mr. Lu and Director Yang, even if I, Xu Yuan, would never have dared to fly such a good fighter in my next life!"

"Yes!"

Ren Wencong nodded approvingly, and then said with some shame: "In comparison, I'm still far behind, seriously, now that I think about it, I don't know why Project No. 10 chose me, really, I really can't figure it out, teacher, can you be a teacher~~~~"

Ren Wencong wanted to ask for advice on the problem of the No. 10 project, so he wanted to ask Yang Hongyi, but he turned around, but found that Yang Hongyi, who was still standing there with a smile on his face, collapsed on the ground, seeing this situation, Ren Wencong ran to Yang Hongyi's side in three steps and two steps, hugged his teacher, and shouted loudly;

But at this time, Yang Hongyi's face was already pale, his cold body was like a dead man, and if there was a snort, he only had air in and no breath

"Teacher, Teacher~~"

"Director Yang, Director Yang~~"

In the face of such a sudden change, Ren Wencong and Xu Yuanchao shouted Yang Hongyi while lifting him to the jeep next to him

"Lao Yang, Lao Yang, what's wrong with Lao Yang? Say, Xu Yuanchao, you and him~~~ Mom will say a word to Lao Tzu"

After learning that Yang Hongyi suddenly fainted and was admitted to the hospital, Lu Jiadong couldn't care about the follow-up test flight mission, went crazy, rushed to the hospital, saw Xu Yuanchao, directly picked up his neck, and asked sharply with red eyes:

"Say, what the hell is going on?"

"The doctor said that Director Yang is late and late stage of lymphoma!"

"Lymphoma, advanced!"

Listening to Xu Yuanchao's words, Lu Jiadong let go of his hand, and then looked at the brightly lit operating room in a daze, poofed, and sat down on the long wooden bench, two tears of remorse slowly slipped from the corners of his eyes, and his pursed lips trembled slightly:

"Why hide it from me, why" (to be continued.) )