Chapter 311: Boss, be my deputy!
Logically speaking, as one of the main persons in charge, it is indeed unreasonable to let an outsider interfere with one's own project like this, and the idea of building two versions of the prototype is indeed a bit crazy at first glance. .
However, as Chang Haonan just said, the first version of the design can actually verify the overall aircraft and most of the subsystems. The second version only needs to check for deficiencies and fill them in, and it will not cause too many problems. A big waste, and if the final complete version of the aircraft can really achieve active stability control as Chang Haonan said, the benefits will be huge...
Yang Wei admitted that he was a little unsatisfied. .
Seeing him bowing his head in thought, Chang Haonan knew clearly that this was a sign of a person in tangle.
Therefore, he added a heavy chip to the opponent's inner balance.
“As for the second version of the design of Project No. 10, I actually had contact with the comrades from Guizhou Airlines once at the beginning of this year.”
Sure enough, it is related to the project. The topic quickly aroused Yang Wei's interest. He raised his head and looked at Chang Haonan with some confusion.
Guihang is a brother unit supported by the 611 Institute and the 132 Factory in Chengdu. He is naturally familiar with it, but so far they can only produce some two-seater JJ-7s. Regardless of In terms of design and production capabilities, it is not possible to intervene in Project No. 10.
“At that time, they wanted to develop a new generation of advanced training aircraft based on the JJ-7. I gave them some support in terms of overall plan and simulation technology. If nothing else, they would wait until the basic design was ready. After that, I am going to try the application of DSI air intake on this project.”
After entering the 1990s, the aviation industry painfully reflected on the experiences and lessons of the previous 20 to 30 years and concluded a set of relatively low-cost and low-risk technology verification models.
Except for particularly critical and special technologies like digital telex, which require the J-8IIACT to be specially manufactured for verification, most new technologies can be developed in small steps in the development process of existing models. Validate to allocate risk.
In the previous life, due to a series of technical development and organizational management reasons, this principle was not well implemented.
There is no way, there are too few projects, and the development progress is slow, so we can only seek to accomplish all our efforts in one battle.
For example, the J-10 has no choice but to intensively apply more than 60% of new technologies, which is actually quite risky.
But now, due to the role played by Chang Haonan, the August 3rd Project was successfully finalized, and more importantly, the development of aviation technology was streamlined, allowing this principle to finally be carried forward.
Including the J-10, which has just completed final assembly and has not yet made its first flight, subsystems and technologies such as radar, power supply, and integrated front windshield have been verified in advance on the J-8C.
Therefore, although the emergence of Chang Haonan has greatly accelerated the development of Huaxia technology, especially aviation technology, this not only did not lead to an unstable foundation, but also reduced the risks of many projects on this timeline.
Now that Chang Haonan is talking about applying DSI air intake technology on an advanced trainer aircraft that has no difficulty in development, it is obviously to prepare for the second version of the design of Project 10.
"DSI air intake..."
This term made Yang Wei stunned for a moment, and then he reacted:
"Oh, you should be talking about the convex hull air inlet, right?"
This was the beginning of the 1990s. , it is even difficult for China to systematically track the international cutting-edge aviation technology, so there is also a lack of a unified idiomatic translation for these new terms.
Chang Haonan nodded:
“Yes, these two translations mean the same thing.”
"This has been a highly discussed design in the past two years, and the research in the United States has just begun. Previously, an F16 was specially modified to verify this thing."
Although it is not available in China at this time. Start related projects, but people like Yang Wei naturally cannot turn a blind eye to this:
"It is said that they are currently working on another fourth-generation machine JSF that plans to apply this technology. You ... Are you sure you can be ahead of the Americans? And if the improved JJ-7 has air intake in the nose, how are you going to install the convex hull, uh, the DSI air intake?"
" Of course it’s not the nose air intake. When I communicated with the comrades from the 648 Research Institute before, the overall plan had been changed to a dual-inlet design in the subcostal part.”
Seeing that the other party has shown a strong interest in it. Interested, Chang Haonan shook his head and continued to explain:
“The DSI air inlet utilizes the waveriding principle and the characteristics of the conical flow itself to blow out the boundary layer of the fuselage by relying on the pressure gradient on the compressed curved surface. This eliminates the need for boundary layer partitions, relief systems, and bypass systems. Several parts are lighter than ordinary air intakes, and the radar reflection area is also smaller. As long as it is designed properly, the performance will definitely be greatly improved."
"The only problem is this. Because the air inlet is completely fixed, the optimization range is relatively narrow. However, considering that the aviation force does not need Project 10 to undertake high-altitude and high-speed interception tasks, it only needs to choose the transonic speed range of Mach 0.7-1.5 for optimization... ”
This is another benefit brought by the smooth finalization of the J-8C.
The J-10 does not need to do everything, it only needs to be responsible for the parts that a normal third-generation aircraft is best at.
“But this kind of thing, just analyzing it on paper is not very convincing. After all, Project 10 is this new advanced training aircraft project. I plan to use it as China’s F16ICON. While meeting the needs of aviation training, it can also serve as a technical verification for the subsequent improved design of Project 10.”
Historically, the verification of the DSI air inlet was originally completed on the Xiaolong, but at present, the Pakistan Air Force seems to be very satisfied with the J-7F, and it is likely to have some impact on the advancement of the subsequent Xiaolong project.
And even if everything goes well, it will take 1998 for the two countries to complete the debate on technical and tactical indicators and finally transfer the project to the development stage.
In any case, Chang Haonan couldn't afford to wait for a year, so he had to use his subjective initiative and launch a project to verify it. Hearing this, Yang Wei, who was sitting opposite, finally suddenly realized——
Oh, no wonder the guy just said that he wanted to make a major change, co-authoring the second version of the air intake design The format has been chosen for us...
You figured it all out, right?
After all, I am Party A and you are Party A?
However, although there is a suspicion of overreaching, Party B, who was originally only invited to assist in the structural and aerodynamic analysis before the first flight, actually sent two such gift packages, and both were J-10 as a The most urgently needed parts of this medium-sized single-engine fighter - reliability upgrades, engine envelope expansion and weight reduction.
It’s really hard to refuse.
After a battle between heaven and man, he decided to temporarily forget his dignity as Party A.
"Okay, what do we need 611 to do? I mean, about everything you just said, active stability control, and DSI air intake."
Yang Wei pressed out the tip of the ballpoint pen again. , and open the notebook.
“Step by step, the DSI air intake can be done later.”
As for the follow-up plan, Chang Haonan has already made a draft:
“Lost Both the stability prediction system and the stability management system require a large amount of data support, and I plan to complete the relevant algorithm and control rate design in one to two months. It is impossible to always run both ends, so now I need you to send a few Someone who is familiar with the overall design of Project 10, especially the matching design of Feifa, came to assist me.”
"How long?"
Even though Yang Wei thought he was used to the outrageous behavior of the guy in front of him, what he heard in his ears still made him feel a little unbelievable.
“One to two months.”
When he was at the 83rd Project, Chang Haonan was used to dealing with this kind of scene:
“That’s it. Without delaying your progress, this system can be integrated into the flight control before the engine ground test begins.”
The reason why Chang Haonan was in such a hurry was because as a reborn person, he knew through later declassified information that the reason why it took more than a year from the offline of the J-10 prototype No. 01 to its first flight was not mainly because of the rumors. Guangzhou's three drops of oil (the inspection after the discovery of the three drops of oil only took about ten days), but due to two blade damage problems occurred during the ground test, which took a lot of man-hours to repair, and finally adjusted the air intake Some details were passed.
If this situation can be avoided, the first flight of the J-10 can actually be advanced to the second half of 1997.
Of course he can also go to the 611 Institute and find ways to perfect the relevant designs in advance.
But doing so also takes a lot of time.
In contrast, it is better to develop this active stability control system in advance to avoid those two blade damages.
In this way, not much time is wasted, and the designers of the 611 Institute can find and solve the problem by themselves.
After all, there are some things in the engineering field that you can only appreciate if you miss them.
And today, Chang Haonan no longer needs to provide himself with enough prestige through several successful problem analyzes and improved designs as he did when he first joined the 83 Project.
Putting your name there is enough.
For example today, he just made a PPT, combined with a simple description, which was enough for the 611 Office to take his suggestions into consideration.
…
Of course Yang Wei doesn’t know what will happen to the J-10 in future tests, but he knows very well that the system developed by Chang Haonan can provide huge fault tolerance space.
In the worst case scenario, it might even be possible to give the entire project a chance to come back to life.
For this reason, it won’t hurt even if the testing progress is delayed for a few months.
And now, the other party actually said that there is no need to waste time at all...
"Let's do it."
Once something like a really good fragrance happens for the first time, there won't be any psychological burden the second time, so Yang Wei quickly made a decision,
"Of course, the one who is most familiar with the overall design of Project No. 10 is Mr. Song, but he has to stay in Rongcheng and be responsible for the boss. The next one is me."
"I will stay here How about I serve as your deputy here?”
It’s all for Project No. 10, Party A and Party B are so narrow-minded!
(End of this chapter)