Chapter 627 The confusing vertical take-off and landing
Faced with this completely sudden request, Chang Haonan was a little confused at first.
After all, even though he didn't think deeply about Jiang Fuhe's emotions when he first arrived here in the morning, he could still feel them.
Why did it take less than half a day for his attitude to make a 540° turn?
The word you hear is not "join", but directly invite yourself to "take over" a project.
And, it’s not just that.
More importantly, I still didn’t expect to have a vertical take-off and landing engine.
Although at this point in time, Institute 624 should indeed have obtained some technical data of the R79V300 engine.
But he was very sure that he had never had this kind of project in his previous life.
Even if China’s research on vertical take-off and landing aircraft must be said to exist, it is limited to the Warhammer-flavored J-6 vertical take-off and landing model in the 1970s.
The idea is extremely wild, which 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 feasibility, at least an idea has been truly formed at the aviation industry level.
The ones that follow are basically the works of aviation enthusiasts, and they are countless.
In fact, for China today, the priority of vertical take-off and landing aircraft is definitely not high.
Although due to Chang Haonan's intervention, Huaxia's level in the aviation industry and even the entire manufacturing field is now much higher than in its previous life.
But comprehensive national strength cannot be reversed in one or two years.
Limited resources still have to be focused on key projects.
Vertical take-off and landing is something that can be done, but it can also be done without.
After all, the combat effectiveness is definitely not as good as that of fixed-wing aircraft with the same technical level, and China does not have the same need as the United States to bully children all over the world.
If it is really implemented, in addition to giving it to the naval aviation force for fun, it will most likely have to be used for export.
But that has to be sold together with a light aircraft carrier or amphibious assault ship.
Arms sales of this level all depend on international influence.
At the moment, China in the late 1990s is obviously not up to par.
So, Chang Haonan did not immediately choose to agree or refuse, but asked about the whole story of the project itself:
"Mr. Jiang, it's still early for the turbofan 10 to be finalized and put into service. I can't make a decision now about whether I can participate in a new project..."
"It's just...I don't know about the vertical launch you are talking about. What is the origin of lowering the engine? "
Heaven and Earth Conscience, he really just wanted to satisfy his curiosity by asking this question, and had no other meaning at all.
But Jiang Fuhe didn’t feel right about it——
After all, the reason why he studied vertical takeoff and landing was because the original push weight was higher than the 9th level and was pushed by the turbofan. 10, a core machine that is infinitely close to the fourth generation, has occupied the ecological niche, and it has no choice but to go eccentric.
Now the instigator actually asked this question directly, which has the beauty of an in-person NTR.
Fortunately, Jiang Fuhe is not a really narrow-minded person after all. He also knows rationally that the other party most likely does not know the twists and turns in the middle, so he took several deep breaths in succession and calmed down. He almost turned red just now. Wen's mood.
But when I think about it, it becomes even more uncomfortable——
Although speaking of it, his project was killed by Chang Haonan, but during the whole process, the latter was probably not aware at all. What happened...
I had already fallen down before others could exert their strength...
I'm so angry, but there's nothing I can do.
"Mr. Jiang?"
Looking at Jiang Fuhe, whose expression became increasingly troubled, Chang Haonan was a little worried that he might have irritated the other person, so he cautiously called out again. A sound.
“Huh?”
“Oh...”
Jiang Fuhe decided to reconcile with himself for the second time.
This kind of thing happens only once and countless times.
So, he tried to maintain as calm a tone as possible: "Mr. Chang may not know something. Our hospital raised funds by itself a few years ago and purchased some of the technical data of the R79V300 engine. It was originally intended to be used as the third The technical motherboard of the fourth generation engine. ”
“But later it was discovered that the performance of the core engine was not enough. Even if our country’s production process was not taken into account, if the limit was squeezed out, it would only be 8.5- The thrust-to-weight ratio of 9 does not meet the power requirements of the fourth-generation engine.”
In fact, of course he knew this story.
Although the R79 engine is already a bit like a fourth-generation engine in terms of core engine level, most of the technology and design ideas are still third-generation, and it is unlikely that it will be able to reach the third and a half generations.
At least the stage pressure ratio of the compressor cannot be compared with today's turbofan 10.
The choice of a radical core aircraft structure is largely just to reduce the weight of the engine to support the vertical take-off and landing function of the Yak 141 aircraft.
So it is reasonable to squeeze out less than 10 level one push weight ratio.
Otherwise, the Russians themselves would not have to bother developing the AL41F and AL51F later.
But at this time, you should definitely let the other party continue talking.
Therefore, he deliberately made a puzzled expression, and even adjusted his sitting posture to suit his unrealistic acting skills:
"Is there such a thing?"< br>
“Yes, later we plan to apply some new technologies based on its design to make a fourth-generation core machine with a 3-8-1-1 or 3-7-1-1 structure.”< br>
When talking about this, Jiang Fuhe leaned back in his chair, but did not feel the expected heart palpitations. He was probably relieved:
"As a result, before we officially started the action, we were Academician Liu called over 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. , but it is obviously impossible to support two similar aviation development projects at the same time. But having said that, the technical data of R79 is self-raised by our institute, and it is impossible to just throw it away. In the end, after much deliberation, the only The only way out is to let him return to his old business."
At this time, Chang Haonan finally knew what was going on with the weird look on the other side that started this morning and lasted until just now.
It turns out that without knowing it, I almost killed a project that others had high hopes for——
Although in the original timeline, the project derived from the R79 core machine ended without any problem, at least in Jiang Fuhe's view now, the "culprit" must be Chang Haonan who can't escape.
After a slight pause, and after adjusting his mentality again, Jiang Fuhe continued:
“We have been studying vertical take-off and landing for a year now. Other parts are fine, but 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, and the thrust fluctuates greatly. If it were to be installed on the aircraft, I'm afraid it would fail halfway through takeoff. It has to overturn.”
“So, just now I heard you say that distributed control gain matrix can be used to improve the accuracy and stability of thrust control, so I thought about whether this technology can also be used in ours. On the model number.”
“Technically there is definitely no problem...”
Chang Haonan lowered his head and was about to analyze the pros and cons of this vertical takeoff 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 Yak 141’s main engine and lift engine. Although the principle is relatively simple, the lift engine It is completely useless in level flight because the dead weight is too large, and more importantly, it is too difficult to balance the lift between different engines.”
"So we were thinking about whether we could use one engine, but output the thrust through two sets of fans. This would at least make the balance a little easier. Of course, the demand for the engine itself would be higher..."
Hearing this, Chang Haonan couldn't help but sigh. China actually has some capable people in the field of aviation development.
You must know that at this time, the JSF project on the other side of the ocean is only a few PPTs. The vertical take-off and landing models of X32 and X35 are not yet available, and there are only a few words about the relevant technical solutions.
In other words, Jiang Fu and their ideas are definitely not backward, but they are limited by objective conditions and many of their ideas cannot be used.
In view of this, Chang Haonan swallowed back the polite words of rejection that were already on his lips:
"Vertical take-off and landing engines are indeed a promising technology."
"In this way, after the test of the turbofan 10 comes to an end, I will systematically organize the related technologies of the distributed control gain matrix into materials "
"As for hosting the project..."
Chang Haonan waved his hand:
"After the A and B types of turbofan 10 are completed, the next step should be Turning it into a true fourth-generation engine may take several years.”
"For me personally, firstly, I probably can't spare the time and energy to participate in two projects that are far apart, and secondly... it's not easy to take away the beauty of others. This engine is a self-funded project of your institute, even if When I become a full-time employee in the future, you should be the one in charge.”
“However, if Mr. Jiang needs it, we can communicate at any time. We are all colleagues.”
Chang Hao. Nan's response can be said to be quite appropriate.
It even made Jiang Fuhe feel a little embarrassed because of his thoughts during the previous half day.
"Then, thank you in advance for Mr. Chang's support..."
While talking, the two shook hands again.
Only this time, Jiang Fuhe finally showed a sincere smile.
(End of this chapter)