Chapter 81: Turbojet 14 (Magic for the Helmsman Flying Luppp002 Plus Update) (2-in-1)

Due to the major changes in the design of the No. 04 and No. 05 verification machines, the day after the completion of the first flight of the No. 04 aircraft, Yang Fenghata quickly presided over a work coordination meeting involving different factories of the 83 Project to determine the current technical status of the 83 Project.

Unlike the previous progress seminars that were only within the 601 Institute, this conference was of a higher level, covered more and more fields, and had several times as many participants.

Overall, the wing-related improvements were carried out very smoothly.

At the same time as Chang Haonan was designing the slats, the wing structure research team successfully arranged the relevant pipelines and hydraulic mechanisms for the leading edge slats into the main wing structure at the cost of reducing the volume of the wing fuel tank by about 5%, which saved the most time for the entire improvement project.

Lin Shikuan's digital design team also docked with Factory 112 and successfully introduced digital manufacturing technology in the improvement and production process of the new wings of the 04 and 05 prototypes.

This allowed Fab 112 to begin production of the new wing almost simultaneously with the wind tunnel testing as soon as the complete design data was available.

In the course of a few days of wind tunnel testing, the flight control design team calculated the control rate of the aircraft with slats as quickly as possible, and modified the previous flight control system accordingly.

They have accumulated a lot of experience in the design of analog and digital fly-by-wire flight controllers in the past J-8ACT and the J-8IIACT, which are about to make their first flight, respectively, so their capabilities in this area are quite reliable.

It is for all these reasons that the prototype 04 was able to complete the refinement and re-launch flight in such a short period of time, and the key components of the 05 have already begun production.

The new integral arc windshield led by Yao Mengna has also completed the structural design and installed the first sample on the No. 04 prototype, and she is assisting Factory 112 to design a new set of forming clamping system control software to ensure the quality of molded parts and reduce the scrap rate.

However, if it was all this kind of good news, then there would be no need for Yang Fenghata to convene this meeting.

Again, the problem lies in the flying hair matching work.

After the intake road professional group and the 606 Institute in charge of the P14 engine were docked, they still could not find out the root cause of the smoke-swallowing shutdown of the engine after the missile launch on the inner pylon.

Objectively speaking, the working conditions of the engines when the Thunderbolt 8 or Thunderbolt 11 missiles were launched were indeed very bad -

When the 612 Air-to-Air Missile Research Institute in Luoyang was developing the Thunderbolt-8 air-to-air missile, there was no smokeless propellant with up to standard performance in China, so the pyrotechnic effect of this missile when it was launched was very spectacular.

Plus the P14 engine, which was not very stable in the first place......

This is a problem caused by the weak system of the aviation industry.

Huaxia is not the only one in the world that uses smoked or slightly smoked propellants, in fact, as long as the aircraft and engines are properly designed, a small amount of primary smoke composed of carbon particles and metal oxides will not affect the launch platform.

For aviation industry powers, even if a link in the equipment system is not perfect, it can often be compensated for by the margin left in other aspects.

But for Huaxia at the end of the 90s, every link in the equipment system is not perfect, and it is not easy to achieve its own design indicators, so once something goes wrong, it is difficult to expect other parts to help recover.

When the topic came to this, the atmosphere of the lively venue at the beginning gradually became heavy.

Fortunately, although the aviation industry system in China is insufficient, it at least has a unified leadership, and there is no phenomenon of different systems attacking each other.

At this time, the 601, 606 and 612 institutes are a whole, and it is useless to throw the blame, the key is to find a way to solve the problem.

"Since it's impossible to determine what the specific engine problem is, we might as well think differently."

In the end, a comrade from the overall design team put forward his own idea:

"The detaching mode of the missile on the innermost pylon can be changed from the slide type to the ejection or drop type, which can reduce the smoke concentration faced by the engine, thereby reducing the failure rate."

Chang Haonan, who was sitting in the first row of the conference table, wrote this question in his notebook and thought about it with a slight frown.

The comrade's line of thought is, of course, feasible.

The missile needs to pass through a launch frame and a hanging beam to be tightly connected to the aircraft.

The so-called slide launch means that the missile is directly ignited on the launch pad and slides away from the launch frame along the trajectory by relying on its own thrust.

In the case of catapult and drop-off launch, the missile first leaves the launcher through the ejection mechanism or its own gravity, and then ignites in mid-air.

Since the missile has already reached a certain distance from the carrier aircraft at the time of ignition, the impact on the latter is naturally much smaller.

In fact, these two methods first appeared in order to launch heavy air-to-surface missiles with relatively large movements and static movements during ignition.

It is no problem to deal with the same Thunderbolt 8, which is too much movement, and the future Asped or Thunderbolt 11/12.

But everything has a price.

Both of these methods have strict requirements for firing overloads, and as a weapon used in close combat, the Thunderbolt 8 happens to often need to be fired under large overload conditions.

So if this method is really adopted, it basically means that the inner pylon can only carry medium-range air-to-air bombs or auxiliary fuel tanks.

What's more, Chang Haonan doesn't like to avoid questions like this.

Although the smoke concentration of the Thunderbolt 8 at the time of launch was large, it could be launched normally when hung on the previous J-7E and J-8B.

Similarly, the R27 medium-range air-to-air bomb, which does not use smokeless propellant and has more movement when fired, can even be launched directly under the Su-27's air intake.

So whatever you may say, the P14 is definitely flawed.

Even if the immediate problem was solved by changing the launch method, the two unstable engines would still be a problem.

It has to be changed!

The truth of this matter is not complicated, Chang Haonan can see it, and other people who participated in the work coordination meeting can naturally see it.

Moreover, changing the way the missile is detached does not actually require any changes to the aircraft itself, as long as the hair frame is changed, and there is no need for even any unit in the 83 Project to participate.

Therefore, this proposal was ultimately chosen only as a fallback option.

On the other hand, it is also due to the overhaul of the wing design, so the 83 project has one more prototype, and the number of test flights is expected to be more than originally planned, and the 606 Institute and the air intake professional group still have the opportunity to investigate the cause of the problem.

Of course, the best way to do this is to abandon the Turbojet 14 and go back to the slightly inferior but proven Turbojet 13F2.

But not only the 606 Institute, but even others involved in the 83 Project were unwilling to do so.

The reason why the development of China's aero engine has been bumpy is that in addition to its weak foundation and the high difficulty of aviation engine as the industrial crown, there is also an important reason that our aviation engine project has only existed as a supporting aircraft project.

This is not only the case for imitations, but also for self-developed models.

If the aircraft project is dismounted, then the corresponding aviation development will also be dismounted.

As a result, there is almost no front and back undertaking between different types of aviation development, and each project is starting from scratch for scientific research institutes.

In fact, not to mention every project, a project with the same code name can be reinvented many times at different stages due to completely different performance and technical requirements.

Such a lesson is especially memorable for the 606 Institute.

In 1963, in order to improve the H-5 bombers that were heavily equipped at that time, the 606 Institute developed the No. 950 engine based on the turbojet 6 under the leadership of Wu Daguan, which was later named the turbofan 5, which increased by 35% and reduced fuel consumption by 30% compared with the original H-5 engine.

In 1970, the turbofan 5 completed the ground test car, and the performance of all aspects fully met the requirements, although there is still a gap compared with the world's advanced level, but it is a smooth first step.

However, in 1973, as the Air Force abandoned the plan to continue to improve the H-5, the turbofan 5 project, which had been completed to a high degree, was also discontinued.

The turbofan 6, which was established a little later than the turbofan 5, also had a bumpy road, after four launches, four dismounts, five changes to the design objectives and transfer of the design location, and finally ended with the J-9 project.

The turbojet 14 "Kunlun", which is supporting the 83 project, is the first one in China to complete its own design, trial production, testing, and successful installation and test flight, and it is also the first aero-engine aero-engine with completely independent intellectual property rights.

Although the performance of this engine in all aspects is very average, everyone has feelings for such a "lone seedling" of aviation power system.

If you choose to use the old model at this juncture, even if it is only temporary, it will definitely have an adverse effect on the Turbojet 14, which stumbled to the test flight process.

Therefore, at the end of the meeting, Yang Fenghata still decided to let the representatives of the intake tract professional group and the 606 Institute go to Yanliang to find ideas to solve the problem, and the 03 prototypes that have just been transferred to the past and the 01 prototypes that have passed before are flying there frequently, which can provide more data.

The other groups cooperated with Factory 112 to complete the production of 05 prototypes as quickly as possible.

……

Throughout the second half of the meeting, Chang Haonan was thinking about his next steps.

He returned to Shengjing ahead of schedule this time to verify the design of the turbojet 14 engine, especially the compressor structure.

If you want to continue to promote the progress of the 83 Project, then the engine must be an unavoidable link.

Moreover, if the progress of the turbojet 14 can be straightened out, it will also be a good start for Huaxia's aviation development industry.

No matter what you do, you need positive incentives.

It's like when you're studying, if you can have a progress bar, and you can increase by a few tenths of a percent by reading a book and doing a few questions for a while, then the number of good students will probably be much higher.

Therefore, first use the fastest speed to get a usable finished product, even if the performance is not bright, it will also produce a good feedback effect.

This hard bone must be gnawed down!

So after the meeting, Chang Haonan directly found Yang Fenghat.

The latter was discussing something with a middle-aged man with a solemn face at this time.

"Eh, Xiao Chang."

Yang Fenghata noticed Chang Haonan who was walking towards him, and then patted the other person opposite him and introduced:

"Oh, Lao Yan, this is the Xiao Chang I told you just now, Chang Haonan."

After the man heard Chang Haonan's name, he turned his head and looked him up and down a few times:

"Comrade Xiao Chang, I have heard Mr. Yang say before that the technical improvement of the 83 Project was presided over by a young man in his early twenties, and today I finally met the real person!"

The other party took the initiative to shake hands with Chang Haonan, but the expression on his face was still very ugly.

At this time, Yang Fengyi said to Chang Haonan again:

"This is the leader of our 83 Project Power Joint Research Team and the chief designer of the turbojet 14 engine, Yan Zhongzhong."

Chang Haonan suddenly realized.

Judging from the current progress of the 83 Project, Yan Zhongzhong, as the general person in charge of the power system, is indeed facing great pressure.

"Hello Yan Gong, I have also admired your name for a long time."

Chang Haonan had certainly heard of Yan Zhongzhong's name before he was reborn.

Although the turbojet 14 developed by him was not successful in the original timeline, the QD128 gas turbine for power generation developed on the basis of it has successfully entered the market stage and even successfully exported, which can be regarded as a positive result in another field.

After the three of them exchanged a few words, Yang Fenghata changed his words and said to Chang Haonan:

"I remember the first time we met at BJC, you mentioned that the theoretical principles of fluid mechanics and the engineering methods of computational simulation are universal, and you are also conducting research in the field of compressor blade design and manufacturing."

"So I and Lao Yan were still talking just now that we want to transfer Ling to the power joint research team and dock some work with the 606 Institute, I don't know what your opinion is?"

How is the opinion.

That, of course, is no comment.

It's better to say that Chang Haonan was still thinking about how to open this mouth with Yang Fengfa just now, and now he doesn't have to worry about it.

Therefore, he agreed to this arrangement almost without thinking, and his decisiveness surprised Yan Zhongzhong next to him.

The latter looked at Chang Haonan, who was standing straight in front of him, again, and said in a solemn tone:

"Xiao Chang, before making a decision, I still have to give you a preventive shot."

"Turbojet-14 is our country's first complete attempt to develop an aero engine model from scratch, and the foundation in this regard is weaker and more difficult than the field you were engaged in before, and it is ...... There is also a risk to your life, so I hope your decision is well thought out. ”

In fact, Yan Zhongzhong himself was almost killed in an engine test accident, so this danger to his life was definitely not a scare.

"In this way, the power joint research team is expected to decide who will go to Yan Liang the day after tomorrow, and you will give me the final answer at that time."

Chang Haonan originally wanted to express himself directly, but after looking at the other party's expression, he didn't speak in the end, just nodded.

Yan Zhongzhong was obviously worried that he would make a choice on the spur of the moment, and as a result, he would underestimate the difficulties he faced, and some emotions would appear when the time came.

This is arguably not uncommon.

Instead of wasting words to explain, it is better to wait for two days and let the other party feel at ease.

"Okay, I'll figure it out."

The first order should be broken 2500, and it will continue tomorrow

(End of chapter)