Faced with this completely sudden request, Chang Haonan was a little confused at first.

After all, when he first arrived here in the morning, Jiang Fuhe's emotions, although he didn't think about it deeply, he could still feel it.

Why did it take less than half a day to make a 540° turn in attitude?

You don't even use the word "join", but directly invite yourself to "take over" a project.

And that's not all.

More importantly, I didn't expect to have such a vertical take-off and landing engine.

Although at this point in time, the 624 Institute should indeed have obtained some technical information for the R79V300 engine.

But he was pretty sure that he had never had such a project in his previous life.

Huaxia's research on vertical take-off and landing aircraft, even if it must be said to exist, is limited to the J-6 vertical take-off and landing model full of war hammer flavor in the 70s.

The idea is extremely wild, that is, to hang four lift fans directly outside the J-6.

Even so, it is already the most serious project in this direction.

After all, regardless of the level of feasibility, at least at the level of the aviation industry has really formed an idea.

And the next ones are basically the ticket works of aviation enthusiasts, and they can't be counted.

In fact, for today's Huaxia, the priority of vertical take-off and landing aircraft is definitely not high.

Although due to Chang Haonan's involvement, Huaxia's level in the aviation industry and even the entire manufacturing industry is much higher than in the previous life.

However, comprehensive national strength cannot be reversed in one or two years.

Limited resources still have to be concentrated on key projects.

VTOL is the kind that can be done, but it can also be not.

After all, the combat effectiveness is certainly not as good as the fixed wing of the same technical level, and China does not have the needs of the United States to bully children all over the world.

If it is really implemented, in addition to playing tickets for naval aviation, there is a high probability that it will have to be taken out for export.

But that would have to be sold with a light aircraft carrier or an amphibious assault ship.

Arms sales at this level depend on international influence.

At present, China in the late 90s is obviously not qualified.

Therefore, Chang Haonan did not immediately choose to agree or refuse, but asked about the reason for the project itself:

"Mr. Jiang, it's still early for the turbofan 10 to be finalized and put into service, and I can't make a decision now......

"It's just...... I don't know what you are talking about this VTOL engine...... What is the origin? ”

Heaven and earth conscience, he asked this question, really just to satisfy his curiosity, and did not mean anything else at all.

But Jiang Fuhe doesn't sound right-

After all, the reason why he studied vertical take-off and landing was because the original thrust-to-weight ratio was 9 and the first level of thrust was occupied by the turbofan 10, a core machine that was infinitely close to the fourth generation, and he had no choice but to go sideways.

Now the initiator actually asked this question directly, which has a kind of beauty of face-to-face NTR.

Fortunately, Jiang Fuhe is not a really cautious person in the end, and intellectually knows that the other party most likely doesn't know the twists and turns in the middle, so he took a few deep breaths in a row, which can be regarded as calming down the emotions that were almost red just now.

But when I think about it, it's even more uncomfortable-

Although it is said that his project was killed by Chang Haonan, but during the whole process, the latter may not have realized what happened at all......

Before others could exert their strength, they had already fallen......

It's so angry, but there's no way around it.

"Mr. Jiang?"

Looking at Jiang Fuhe, whose expression on his face was becoming more and more twisted, Chang Haonan was a little worried about whether he had stimulated the other party, and cautiously shouted tentatively.

"Huh?"

"Oh......"

Jiang Fuhe decided to reconcile with himself for the second time.

This kind of thing, only once and countless times.

So, he tried to maintain as flat a tone as possible:

"Mr. Chang may not know that our hospital raised its own funds a few years ago and purchased a part of the technical data of the R79V300 engine, which was originally intended to be used as the technical mother of the fourth-generation engine."

"But later I found that the performance of the core machine was not enough, even if we didn't consider the production process of our country, squeezing out the limit was a thrust-to-weight ratio of 8.5-9, which did not meet the power requirements of the fourth-generation engine."

Actually, this story, of course, is clear to him.

Although the R79 engine has a bit of a fourth-generation engine in the core engine stage, most of the technology and design ideas are still the third generation, and the three-and-a-half-generation engine is not very capable of it.

At the very least, the compressor pressure ratio cannot be compared with today's turbofan 10.

The radical core structure was largely chosen to reduce the weight of the engines to support the vertical take-off and landing capabilities of the Yak 141.

Therefore, it is reasonable to squeeze less than 10 first-level thrust-to-weight ratio.

Otherwise, the Russians themselves would not have had to bother to develop AL41F and AL51F later.

However, at this time, you should definitely let the other party continue.

Therefore, he deliberately made a puzzled expression, and even adjusted his sitting posture in order to match his not very realistic acting skills:

"And that kind of thing?"

"Yes, I am going to apply some new technologies on the basis of its design, and make a 3-8-1-1 or 3-7-1-1 structure of the fourth-generation core machine."

When he said this, Jiang Fuhe leaned back in the chair, but he didn't feel the expected palpitations, and he was probably relieved:

"As a result, before we officially started the action, we were called by Academician Liu to participate in the design review meeting of your Taihang project, and found that this idea has been preempted, and the degree of completion is still very high."

"Although the country's investment in the aviation industry has increased in the past two years, it is obviously impossible to support two similar aviation development projects at the same time, but then again, the technical data of R79 is our self-raised funds, and it is impossible to just throw it away.

At this moment, Chang Haonan finally knew what was going on with the strange look that the other party had since this morning and lasted until just now.

It turned out that without knowing it, I almost killed the project that others had high hopes for-

Although in the original timeline, the project derived from the R79 core machine ended up in the end, but at least in the eyes of Jiang Fuhe now, the "culprit" must be that he Chang Haonan can't run.

After pausing slightly, and adjusting his mentality again by the way, Jiang Fuhe continued:

"Vertical take-off and landing, until now we have also studied a small year of effort, the other parts are fine, that is, the thrust between the lift fan and the main fan is not well balanced, we have done several simulation tests with the old model engine, the thrust fluctuates greatly, it really wants to be installed on the plane, I am afraid that it will have to overturn halfway through takeoff."

"So, just now I heard you say that you can use the distributed control gain matrix to improve the accuracy and stability of thrust control, so I wondered if I could use this technology on our model as well."

"Technically, it's definitely fine......"

Chang Haonan lowered his head and was about to analyze the pros and cons of this vertical take-off and landing project, when he suddenly caught a key word in the other party's mouth:

"Wait...... You just said ...... Lift fan? ”

"yes."

Jiang Fuhe nodded:

"We have also studied the scheme of the main engine plus lift engine of the Yak 141, although the principle is relatively simple, but the lift engine is not used at all in level flight, the dead weight is too large, and more importantly, it is too difficult to balance the lift between different engines."

"So we thought, can we use one engine, but the thrust is output through two sets of fans, so that at least the balance can be a little easier, and of course the demand for the engine itself is higher......"

Hearing this, Chang Haonan couldn't help but sigh that Huaxia still has some capable people in the field of aviation development.

You must know that the JSF project on the other side of the ocean is only a few PPTs, and the vertical take-off and landing models of X32 and X35 have not yet been shadowed, and the relevant technical solutions are only a few words.

In other words, Jiang Fu and their ideas are definitely not backward, but they are limited by objective conditions, and many ideas cannot be brought into play.

In view of this, Chang Haonan swallowed back the words of refusal that had already reached his lips:

"The vertical take-off and landing engine is indeed a promising technology."

"In this way, after the test of the turbofan 10 is over, I will systematically organize the technology related to the distributed control gain matrix into materials."

"As for hosting the project ......"

Chang Haonan waved his hand:

"After the completion of the A and B types of the turbofan 10, the next step should be to turn it into a true fourth-generation engine, and this process may last several years."

"For me personally, I probably don't have the time and energy to work on two projects that are far apart...... It's not good to take away the beauty of people, this engine is a self-funded project of your hospital, even if it turns positive in the future, the main unit should be you. ”

"However, if Jiang always needs it, we can communicate at any time, we are all colleagues."

Chang Haonan's response can be said to be quite decent.

even made Jiang Fuhe feel a little embarrassed because of his thoughts in the previous half of the day.

"Then, thank you in advance for Mr. Chang's support......"

As they spoke, the two shook hands again.

Only this time, Jiang Fuhe finally showed a sincere smile.

(End of chapter)