Although Tang Changhong is the first time to serve as the chief designer, he has also served as a subsystem designer responsible for important research and development content in the two projects of the J-7 basic type and the Xinzhou-60, so there is no problem with the prestige within the 603 Institute.

Since he said so, the other people below naturally had no worries and began to think about how to adjust the parameters of the aircraft in order to better adapt to the combat ideas of the new era, and not to waste those two engines with huge performance improvements.

Seeing that everyone had unified their thoughts, Tang Changhong continued to add:

"This time, the users of the J-7 have expanded from the pure navy to the navy and the air force, and the latter has also provided us with a project funding, and requires the aircraft to have the ability to carry out ultra-low-altitude penetration and use precision-guided weapons."

"Users have made new requests, so we also have to make some targeted upgrades to the functions of the aircraft."

After a short silence, a young engineer who was responsible for assisting Tang Changhong in the overall scheme design first spoke:

"Since the performance of the new engine is so much better than Spey, the wing area and strength can be slightly expanded, and the old model of the J-7 can only carry two YJ-81 anti-ship missiles each, which is too inefficient."

"The navy faces few targets, and the problem may not be very big, but the air force may have to attack multiple targets in a single sortie, and the low ammunition carrying capacity will definitely reduce combat efficiency."

A technical seminar is actually similar to a graduate student group meeting.

With the first speaker, there will be a lot of followers.

Another old designer with gray temples and a much older look than Tang Changhong continued along the topic of wings:

"When Mr. Chen designed the aircraft, in order to reduce the risk of research and development, he chose a more conservative airfoil, which led to the overall flight performance being relatively average."

"When I went on a business trip to the 601 Institute last year, I saw some wing design materials of the J-8C, and I think it is completely possible to refer to it."

When it came to this, some people immediately expressed doubts:

"J-8C...... Isn't that an interceptor, or a delta wing, which doesn't match our plane at all, right? ”

"Borrowing ideas, not copying."

The old designer stretched out his finger and tapped on the table in front of him, as if emphasizing what he was going to say next:

"The final shape of the J-8C adopts the idea of integrated design of the leading edge slat, main wing and trailing edge flap, which can avoid the simultaneous deflection of the flap blade, the mixed boundary layer and the flow separation at the same time, although it is a large delta wing interceptor, but the low-altitude lift and maneuverability are very good."

"A slasher has fully considered low-altitude performance, and if our fighter-bomber falls in this regard, it will be a shame to lose ......."

"Another ......"

At this point, he paused slightly, as if hesitating to continue.

But in the end, he lowered his voice and continued to speak:

"In addition, I also heard from the people over there of the 601 Institute that the leading edge slats structure of the J-8C is the first change that Xiao Chang started to complete after joining the 83 Project!"

Well, people are interested in this kind of gossip content.

"Mr. Xiaochang? It's ......"

"Who else can it be, it must be Chang Haonan Chang Zongbei, and the calculation time should be right......"

Obviously, the name Chang Haonan is still somewhat legendary in today's aviation industry system.

"Shhh...... If that's the case, you might really want to consider sending someone to learn about it. ”

Someone immediately made a clear statement:

"When Mr. Chang changed the J-7 here, I had the honor to work under him, and according to Mr. Chang's work style, while designing things, he will definitely leave a complete set of methodologies, let's learn from them, and we will be able to get twice the result with half the effort."

"The ...... of the people who were sent to study"

“……”

Seeing that the topic was a little off-track, Yang Lin, a senior engineer in charge of the design of the airborne weapon system, gently tapped the document paper in front of him with a pen cap:

"Speaking of ultra-low-altitude penetration."

"The Air Force's ultra-low-altitude penetration defense is not the same as the Navy's, the environment is much harsher, our country currently does not have the US military AN/AAQ-13 such low-altitude integrated navigation equipment, and even the PRNK-23K can adapt to the low-altitude environment of the target recognition and tracking system is lacking existing models......"

"In this way, whether it is flying or attacking, the pressure is very high......"

"On the bright side, the J-7 has two pilots who can be responsible for flying and attacking respectively, so the pressure is not as great as that of the MiG-27 or F16C pilots."

Gong Xinmao, the deputy chief designer in charge of the flight control system design next to him, took a sentence, barely comforting.

Immediately afterwards, he spoke his thoughts:

"Can you consider using the search radar in the nose to be responsible for terrain tracking, combined with the sled method or the adaptation angle method to achieve terrain matching tracking?"

"The performance of the 232H fire control radar on the old J-7 is definitely not enough, but the 1473 developed for the third-generation aircraft now, or the 1472 radar used on the J-8C should be able to meet the requirements, anyway, when the ultra-low altitude penetrates, the radar is not used to search for targets."

As a flight control designer, this is obviously the most straightforward approach he can think of.

Although the original design of the 147X family of radars was intended for anti-air, it was not difficult to add a youth version of terrain tracking to its base.

After all, it was just a request to avoid collisions, and it didn't say that the terrain should be completely mapped.

However, Yang Lin, who has a lot to do with weapon systems, immediately denied this idea:

"This method can fly, but low-altitude penetration is originally the pursuit of concealment, and at this time, the nose radar is turned on with great fanfare...... I'm afraid it's not quite suitable, right? ”

"The launch angle of the nose search radar is too large, in case there is still the opponent's plane in the air, then the radar warning receiver will not be exposed to everything?"

"Is there a better way? It is certainly not possible to integrate terrain tracking radar into a pod at present, and since users are required to use precision-guided weapons, they also need to consider carrying laser-guided pods and data transmission pods for air-to-surface missiles, and it is unlikely that there will be a place for a third pod. ”

“……”

Seeing that the atmosphere at the scene was a little too enthusiastic, Tang Changhong hurriedly calmed the scene:

"Comrade Xinmao is right just now, after all, the J-7A has two pilots, and the pressure during normal flight at ultra-low altitude is relatively not so great, so compared with the automated low-altitude navigation pod, we still have to pay attention to the most basic flight safety issues first."

"According to the feedback of the basic J-7 pilots, what they are most worried about is actually a sudden power failure when flying at low altitudes."

"In terms of flight safety, I remember that the Rongcheng 611 Institute, during the test of the No. 10 engineering prototype, used a technology that can predict engine surge in advance through air intake, and after discovering the risk of surge, it will restrict the aircraft from continuing to maneuver vigorously to avoid the occurrence of surge risk."

"Comrade Xinmao."

Tang Changhong looked at his deputy chief designer next to him:

"I have contacted Chief Engineer Song Wencong and Chief Engineer Yang Wei of the 611 Institute, and they agreed that we will send a team of technicians to inspect and study, and I am ready for you to lead the team and stay in Rongcheng for a while."

Although the various places under the aviation industry system have been transformed into branch groups, and there is some competition between them, in the final analysis, it is still a game of chess for the whole country.

With such an important technology, it is impossible to hide it and use it only for yourself.

Gong Xinmao, who was suddenly named by name, was directly stunned.

This technology sounds too good to be true.

Especially for fighter-bombers, which mainly fly at medium and low altitudes, once a surge occurs, they often do not have as sufficient response time as fighters.

Coupled with the relatively general ejection escape system of the J-7, it is easy to cause first-class accidents such as aircraft crashes and deaths.

If it can be detected and suppressed in advance, or even if it is only delayed, it will be extremely beneficial for flight safety.

Therefore, he immediately got up and solemnly stated:

"Yes! I'm going to learn this technique and bring it back! ”

(End of chapter)