Hurried back to Guiyang, the reasons for this are naturally varied, if it is said that there is a happy event, of course there is no mistake, after all, there is indeed a plane to fly in Guiyang for the first time, but to say that all are happy events are naturally wrong, this time can be described as a mixed blessing.

Just got out of the car, Yang Hui came to a J-18 project department for the first time, this time J-18 still had an accident after all, for this kind of problem found at the moment close to the first flight of the aircraft, it is really unpleasant, but after the accident, you still have to face it, no matter how unhappy you are, no matter how serious the negative impact is.

Looking at the hangar is urgently troubleshooting the research team, even if there is a fire in the heart and calm down, at this time we still have to believe in the professionals, led by the two general managers of the project to carry out troubleshooting inspections, this is already the current maximum technical force to take out, now what needs to be done is to believe in the technical team tempered all the way over the years.

Motioned to the people standing next to him to the side, not far from the hangar: "Let's talk about it first, what is going on this time, we have already said that we will strive for the first flight before the year, and now this is not possible, but this is not the point, the focus now is to find out if there is a fault?" “

Yang Hui was already full of concern on his face, but the answer to him was not good news: "Mr. Yang, this question was only discovered when we were running on the ground the day before yesterday, and the two engines of the J-18 power system had the same engine control action ineffective at the same time in the run, so we must not conduct flight tests before troubleshooting." ”

The more I listen, the more anxious I become, Yang Hui has also been engaged in technology, of course, I know what it means that two engines have the same technical failure at the same time, this is definitely not accidental, and it must be a design problem, and if you don't know the reason, it is not easy to solve, which is really worrying.

sighed heavily, now the situation is really not urgent: "I roughly understand, this J-18 first flight before the first flight will be abandoned!" It is safest to eliminate the fault, and the progress of the project is not afraid to delay some later, and it is necessary to catch it when the test flight is carried out in the next few years. In a sense, it's a good thing that this kind of major failure occurred during this run, at least we knew that there was a problem here, and we definitely wouldn't have let such a major technical failure take the plane into the sky, which is good! ”

At this time, in addition to self-comfort, there is not much way to solve the problem, and the only way to solve the problem is to wait for the technician to complete the final troubleshooting work.

It was also at this time that Sun Huizhong, the chief designer of the J-18, walked out of the hangar, and at a glance it could be seen that this was in poor spirits, thinking that it was the reason for the long-term mental pressure and hard work in the past few days.

For this reason, my heart is slightly sour, in fact, this situation is a very common thing in the aviation industry, and it is not good to say anything to force the order to rest or something, anyway, everyone comes over like this, Yang Hui himself has experienced similar situations many times, even his wife Yang Yue also often encounters, everyone really wants to get to the time when they really can't stand it, don't guess that at this time in a corner of the hangar, it is still equipped with a marching bed and the like as a place to rest!

Hurry up and walk over, don't say anything else, clasp your hands tightly and pat your shoulder, a look is the best communication, all this is self-evident. After everyone came around, Chief Master Sun sat on the flower platform with his buttocks, and after gently beating his legs, he dragged his tired voice.

"The general situation can be regarded as a clarification, we have to make it clear that the first aircraft uses a turbofan 10 engine, this aircraft has been used intensively for up to five years, and has a total of 260,000 hours of on-board operation time, and there is no big design problem in itself, so we focus on the design of the fuselage."

This is quite realistic, whoever should bear the problem, and will not blame more problems that were originally on their own side to other systems, at least this is what people who do scientific research and technology should look like.

Then everyone still had a curious expression, and Chief Master Sun said quickly: "The problem is that our turbofan 10 engine this time is not the engine that J-18 plans to install and use when it is finally finalized and delivered, so we are not fully in accordance with the requirements of the turbofan 10 engine to design the engine control system when we design, but more to consider the turbofan 12 that will be finalized and installed in the future, so it causes some of the engine control systems to be mismatched with the aircraft. This is the initial conclusion we have reached. ”

Hearing such a conclusion is quite convincing, at least it is not a hidden problem in the design, but it belongs to some aspects that are not taken into account in the design, at least it is much better to know how to improve and eliminate these faults.

So, even if everyone had the bottom in their hearts and knew that the problem could be solved, Yang Hui soon had some ideas: "If this is the case, I'm afraid you need to conduct a comprehensive inspection of the aircraft's power control system." Since the turbofan 10 uses much electrical control than the turbofan 12, then I think the problem is likely to lie in this aspect, and it should probably be more electrical control standards when designing the J-18 power control system, so it will also be a little mismatched with the mechanical control of the turbofan 10! ”

Anyway, the problem that Yang Hui can think of is probably here, and it should be impossible to have problems in other aspects, so he directly said the reason for the failure that he guessed, just as a reference, maybe the problem is really like this, who knows this kind of thing?

After looking at Yang Hui, Mr. Sun nodded silently: "That's right, what Mr. Yang said is the same as the preliminary conclusion of our technical research team, so in the next few days, we also need to pull the aircraft out to re-conduct the joint debugging test between the aircraft and the power system. ”

They are all insiders, and after thinking about it for a while, they know that this problem is indeed very likely to come out here, and they all agree with this idea very much, and this also gives Mr. Sun a lot of encouragement, and he will stand up and enter the hangar to continue to arrange the necessary power joint debugging test for the next few days.

There is not much rhetoric, and until the fault is actually confirmed and troubleshooting, there is no guarantee that this time is right, and the intense troubleshooting requires more "bold guesses, careful testing and validation" than confidence.

After Chief Master Sun walked into the hangar again, Yang Hui stood outside and watched for more than ten minutes, and after smiling and greeting those troubleshooting personnel who were occasionally free, he still chose to turn around and leave here.

Along the way, Yang Hui roughly thought about it, if this failure is what he just guessed, there should be only two solutions, or two ways to solve the problem: the engine accommodates the aircraft design, or the aircraft accommodates the engine design, and there is no other way.

The so-called engine accommodates the aircraft, naturally after confirming the fault, temporarily change the mechanical and hydraulic control part of some turbofan 10 engines to electrical control, which requires the cooperation of 0112, they have the electrical control system design scheme of turbofan 12, take it according to the turbofan 10 before this large amount of money after testing the valuable database to change, almost can be used, such a scheme does not need to move the design of the aircraft, and it can be easier to replace the turbofan 12 in the future.

The other is according to the mechanical hydraulic control requirements of the turbofan 10, and then the corresponding mechanical hydraulic control pipeline is arranged on the aircraft, and these pipelines need to pass through the fuselage until they reach the cockpit, and such improvement needs to disassemble the aircraft again, and the complex hydraulic pipeline is not easy to arrange.

The fuselage of the aircraft is originally an inch of land, not to mention the fighter plane, where is the space to arrange more pipelines outside the design, and the arrangement of these pipelines also requires additional drilling operations on the closed box section structure of the aircraft with complex stress, but the structure after punching will be seriously damaged, which requires a certain strengthening of the structure, which can be described as troublesome.

Therefore, this time the problem is solved, I am afraid that the engine design team of the 0112 institute will be more affected, fortunately, the turbofan 10 has gone through all the processes in the development of the turbofan 10, and the small improvement of the control system is relatively simple, all because the 0112 institute has completely mastered all the test data of this engine, everything is so handy, if it is replaced by an engine that does not have detailed R&D test data in China, who dares to move these inherent designs?

And this is the advantage of having independent intellectual property rights, and the rest is absolutely unsolvable!

Don't think about these things about the J-18 troubleshooting, if the J-18 failure is bad news, then you need to use a good news to rush to the joy, it just so happens that there is another aircraft here in Guiyang to make its first flight, it is nothing else, it is a domestic early warning aircraft project that has been established for several years.

It is less than three years since the project was established, although the development team of the "Quantum M" airborne early warning radar system has also been dug from Russia, but this time the radar has been overhauled, and it is not so easy to complete after all, so the first aircraft is not equipped with radar, but there is no radar and the first flight is still to be carried out. (To be continued.) )