Hearing Lin Yongming's request on the phone, Wang Ming looked strange.

He couldn't figure out how Lin Yongming, who had fully supported the introduction of Russian-made engines a month ago, suddenly changed his sex.

Moreover, on the phone, the other party said that he wanted to develop his own engine, but it didn't seem to be referring to the WS-10.

Is there a new plan?

Is it in time?

Or is there an alternative on the American side?

It seems that they have plans to share the full set of CFM56-3 engine technology with Huaxia, and even plan to provide some upgrade technology.

But even so, it's too late.

Wang Ming wanted to ask for an understanding, but Lin Yongming pushed him back with a sentence of "confidentiality regulations", and the other party asked him to call back with a confidential line in half an hour, and then inform him of the details.

So, he had to hang up the phone in confusion.

At this time, most of the people in the conference room also heard the content of the call, and everyone looked at each other, not knowing what to do for a while.

"Anyway, let's put the plan on next week's second round of negotiations and postpone it."

"I have made an appointment with Mr. Lin, and I will discuss the details with him a little, and if I can report it at that time, I will report it to you immediately."

With that, Wang Ming hurriedly left the conference room.

At this time, he was full of doubts, almost not equal for a moment, and he wanted to call the internal phone immediately to find out what was going on on the group's side.

Behind him, the purchasing representatives who remained in the conference room were talking.

"Self-developed engines? What's going on, it's a bit exaggerated....... J-10 is about to be put into service and mass production, and now it is about to be replaced, how can it be in time? ”

"It's not a matter of immediacy, it's a question of impossibility. Isn't it whimsical that WS-10 is progressing so badly, and now it is going to be a new project? ”

"Maybe it's not a new project? Maybe forced? ”

"Forced? Are you saying that the AL-31FN has significant flaws? ”

"Quite possibly, otherwise how would you explain these three accidents? Don't we actually think there's something wrong with it? It's just that there is no way, the lesser of two evils. ”

"Makes sense...... But it's not right, haven't you seen it over there at 606? There is not enough data to see the problem. ”

"What if they're not the ones who see the problem?"

"What are you kidding, they can't see it, is there anyone in the country who can see the problem? Damn, it's not going to be another brain-slapping decision, right? ”

"It looks like it....... It's a bit troublesome now, if the AL-31FN is really stopped, then our plane will still fly a fart! ”

"It's better not to fly than to fall, I think it's the right thing to do, I'd rather be late, and the direction can't be wrong."

"Then you just don't have a backache when you stand and talk, we are too short of third-generation aircraft now....."

......

Half an hour later, in a completely closed office.

Wang Ming sat at the table, frowning and making a phone call.

“...... Leader, this decision was really too sudden. ”

"We have been promoting this introduction project for two years, not only everyone has paid their efforts, but the progress of the Jian-10 project is also matched with the introduction work."

"If the introduction plan is temporarily canceled now, the entire Jian-10 project will be affected."

"I really can't understand why the plan was suddenly changed, and if it's because of a couple of recent accidents, I don't think that reason is sufficient."

"For one, these accidents are not enough to show that the AL-31FN engine itself has major flaws; Second, we really have no other choice, even if there are some minor problems with this engine, we can only grit our teeth and go first......."

"What if the AL-31FN is a major flaw?"

On the other end of the phone, Lin Yongming interrupted Wang Ming's words mercilessly.

Wang Ming here was stunned when he heard this, and subconsciously said:

"It can't be! The AL-31FN is a tried-and-true engine, and it has consistently performed well on the SU-27, and although there are constant minor issues, the overall performance and design philosophy are no problem......."

"Leader, if you say that there is a problem with AL-31FN, then at least you have to come up with convincing evidence, otherwise...... It's hard for me to convince the staff below me. ”

"After all, this engine has been proven by the 606, and in our current conditions, it is a qualified product."

Wang Ming's tone was firm, and his confidence came not only from the so-called "Russian experience", but also from the professional judgment of those experts in the 606 Institute.

If they don't see the problem, then this engine is fine.

Even if you are a leader, you have to respect the objective law, and you can't overturn all the judgments of professionals with a single sentence from your superiors, right?

However, what he didn't expect was that Lin Yongming did not try to use his position to subdue himself, but patiently explained:

"The AL-31FN engine is good, but I want to ask you, do you know what the design concept of this engine is? In what ways did they increase the power of this engine when the material strength was not strong enough? ”

"Design of low-pressure rotor with double intermediate bearings and four bearings."

Wang Ming replied without thinking.

Although he is not an expert in this field, he still understands some basic principles.

"Do you know what the flaws are in this design?"

"Flaws? For now, there are no obvious flaws in this design, if anything...... Presumably because the connection of the bearing is more complicated? ”

"That's right! That's the crux of the matter! All the spindles of this engine need to be fixed and supported by roller bearings. The rotation of the roller rod requires a large amount of lubricating oil to reduce friction, so that it will not be sintered, peeled, extruded and deformed, or even cracked and worn. ”

"That's why the lubrication system was particularly important for this engine."

"Generally speaking, the nozzle for spraying lubricating oil will be installed in the engine very close to the bearing, and the high-pressure, high-flow lubricating oil will be directly injected into the balls and rollers of the bearing at high speed."

"However, due to the special design of AL-31FN, the bearings between the rotors, regardless of the inner ring and the outer ring, are connected to high-speed rotating parts, and there is no way to install a fixed lubricating oil nozzle, so it has to settle for the next best thing, first injecting the lubricating oil into the low-pressure turbine shaft, and then throwing the oil from the left and right sides to the bearing through the high-speed rotation of the turbine shaft."

"Such a design, whether it is flow, speed, or pressure, does not form a reliable lubrication and cooling effect, and this is the fatal flaw of this engine!"

"Lubrication reliability!"

"Do you know why this engine performs better than the J-10 on the SU-27? Why is it so much less likely to fail on the Su-27? ”

Hearing Lin Yongming's words, Wang Ming on the other end of the phone had already fallen into deep thought.

Lubrication reliability...... This is a direction that neither he nor even the researchers of the 606 Institute have considered.

It's not because they don't have enough capabilities, but because the too barren flight data simply can't reflect the real situation of the work of the lubrication system in the engine, and every time there is a problem with the engine, the Russian side will immediately collect and check it, and it doesn't even have the opportunity to check those worn components!

He couldn't help but break out in a cold sweat.

If this is the case, then this engine, J-10 will definitely not be used.

The reason is simple, load!

The Su-27 is a twin-engine fighter, while the J-10 is a single-engine!

No wonder the problem is with the engine under high load every time!

His cold hairs stood on end, and his mouth opened subconsciously, but he could only stutter a few words.

"It's because....... The Su-27 is a twin-engined ......."

"That's right!"

Lin Yongming on the other end of the phone sighed heavily.

"So you know now why I stopped the introduction."

"We almost missed this major defect, and if it is really introduced, we will face a series of problems in subsequent use......"

Wang Ming nodded Muran, from Lin Yongming's explanation, he had already sensed the seriousness of the matter.

However, at the same time, another question arose in his heart:

Who discovered this problem?

It is absolutely impossible to be Lin Yongming, he does not have such a level of professionalism.

It's not 606, because just earlier today, I discussed with them about this engine.

Could it be that some old monster is out of the mountain again?

He subconsciously wanted to ask, but soon realized that this might not be the question he should ask.

So, he could only stabilize his mind and change the topic and said:

"Leader, I see what you mean."

"But even so, it is not wise to hastily halt the introduction of AL-31FN, we should at least purchase a small amount and get through the window first......

"There's no need."

Lin Yongming on the other side replied decisively.

"We don't have to buy this engine anymore, and we probably won't even have to wait for the WS-10."

"We're going to build a whole new engine."

"A more powerful and technologically advanced engine."

Hearing this, the shock in Wang Ming's heart was beyond words.

It's really time to build an engine.

And judging from Lin Yongming's tone, his confidence in this matter is something he has never seen before......

Who gave him such confidence?

Thinking of this, he could no longer control his curiosity, and couldn't wait to ask:

"Who's going to make it?"

Lin Yongming on the other end smiled and gave him an expected answer:

"The one who discovered the defect in the AL-31FN lubrication system, of course!"