Although he didn't quite understand why Chang Haonan was so concerned about the domestic Spey of Factory 430, Zhong Shihong didn't ask much.

He knew he should unconditionally support the General Technical Counsel in everything he decided.

At least on the premise that it does not seriously affect the interests of the 410 factory.

So that night, the two met with several technical backbones sent by the 430 factory in a small conference room.

Zhang Zhenhua spread out some of the technical information he brought on the conference table.

"General Counsel Chang, Director Zhong, the main work that our factory is doing now is to strive for the localization of the Spey MK202 engine introduced in the past in accordance with the deployment of the superiors, and this model is currently planned to be named turbofan 9 'Qinling'."

"At present, the Navy and Air Force aviation are very recognized by the combat capability and cost performance of the J-7, and hope to be equipped with more aircraft of this type, so the number of equipment of the turbofan 9 in the future should be a lot."

“……”

He took a few minutes to give a brief overview of the turbofan-9 project.

Of course, this link is mainly for Chang Haonan.

After all, he's only in his early 20s, so he shouldn't know much about the late '70s.

And Chang Haonan was also happy to take some time to listen to it, otherwise he would really not be able to explain where his knowledge about the turbofan 9 came from.

Besides, there are some secret history-level things in it, and he really didn't know about it before.

In short, Zhang Zhenhua's idea is to directly purchase equipment or engage in cooperative research and development in the form of investment, first copy the Spey MK202 as it is, and solve the urgent need of the J-7, and then if Chang Haonan still has extra energy, it is best to treat the turbofan 14 like the turbojet 14, and give the turbofan 9 a reborn improvement.

"Hmmm......"

Chang Haonan looked at the information about Sibei on the table, and did not immediately give a positive answer, but touched his chin and thought for a while.

This moment of hesitation made Zhang Zhenhua, who was sitting opposite, relax a little and nervous again.

Fortunately, he specially studied the previous experience of this comrade general counsel in the afternoon, and found that the latter had participated in the formulation of a series of standards for the autonomous aviation industry, and it seemed that he should have a strong obsession and insistence on self-reliance.

And this kind of person is often the most unbearable for the argument that it is better to buy and buy than to rent.

So he gritted his teeth and continued:

"Now there are many people's opinions that they should directly ask Rolls-Royce to buy hundreds of Spey engines for the J-7, but we still feel that it is somewhat unreliable to pin this kind of core equipment that affects national defense and security on foreign countries, especially from Western countries."

Of course, Chang Haonan knew that the other party was provoking himself with words, so he immediately waved his hand:

"Don't worry, I'll definitely support pushing the turbofan 9 down."

"But the specific operation is still a little different from what you want to fear."

Zhang Zhenhua felt that he needed to always have some quick-acting heart pills.

"What do you mean ......"

Chang Haonan organized the language a little:

"Regardless of who was right and who was wrong in the debate back then in the 70s, from today's point of view, Spey MK202's technology is indeed lagging behind."

"In addition to the two indicators of military fuel consumption and maximum thrust on paper, Spey's performance is not even as good as the turbojet 14A in the finalized state."

"And more importantly, its upgrade potential has also been squeezed to the limit, and the ring pipe combustion chamber and the excessively large bypass ratio have fundamentally limited its use in fighter jets."

"Therefore, the only use of this model at present is to equip it with the J-7 model."

After hearing this, Zhang Zhenhua nodded helplessly.

Although he is reluctant to admit it, what Chang Haonan said is all the truth.

Spey's design is too old, and even in its early days, the performance alone was very mediocre.

Its thrust at medium and high altitudes is even inferior to that of the Turbojet 7.

It is also for this reason that the comprehensive performance of the British version of the Phantom, the F4K fighter, equipped with a turbofan engine, is not as good as the American version of the late-stage Phantom equipped with the J79 turbojet engine.

Twenty years ago, it would have been said that Spey's design concept was at least advanced, but now, especially after the advent of the Turbojet 14, the situation has changed.

At this time, Chang Haonan changed his words, and came first to suppress and then to raise:

"But what you just said is right, the localized Spey, or turbofan 9, has an irreplaceable role for the J-7."

"Therefore, I hope to use a more resource-efficient way to help you get the turbofan 9 out, and also carry out subsequent upgrades."

Although there is no such concept at the moment, Zhang Zhenhua feels that he should have been PUA, and there is evidence.

But he had no other choice.

"Tell me about it."

Seeing that the fire was almost over, Chang Haonan said his ultimate goal:

"I hope to use the turbofan 9 project to verify some manufacturing technology."

"Technical validation?"

This statement made Zhang Zhenhua show a somewhat confused expression,

"Neither Qinling nor Kunlun can meet the needs of the third-generation fighter, so the project of developing the third-generation high-thrust turbofan engine must be put on the agenda as soon as possible."

Chang Haonan stood up and gave an explanation while pacing slowly.

Not only for Zhang Zhenhua, but also for Zhong Shihong.

"We have to admit that we lack too much technology in this area, and with our current capabilities, it is difficult to even complete the design work, let alone the rest of the work."

"But if you have to wait until the preliminary design of the turbofan 10 is completed, and when you start to build the engineering prototype, you will start to solve the problems in manufacturing, then this cycle is a bit too long, and the time to focus on the design in front of you is equivalent to wasting half."

"So I'm going to synchronize these two processes, or approximate them, and at the same time improve the design scheme, and verify and refine some new technologies that may be used in the production and improvement of the turbofan 9."

"According to my thinking, the design of the turbofan 9 should not be much different from the Spey MK202, but with the advancement of our manufacturing technology, it may gradually use a series of new things such as precision casting casings and fans, new materials of single crystal turbine blades, and of course, in the process, its performance will definitely improve compared to the original."

Zhang Zhenhua understood.

Zhong Shihong also understood.

Chang Haonan is in the next big game.

At the cost of slightly sacrificing the design finalization progress of the turbofan 9, it is ensured that the more important turbofan 10 in the future can obtain higher research and development efficiency.

If all goes well, the design can be transferred to small batches even immediately after completion, and the time required for production finalization can be significantly reduced.

"Turbofan 9 as a verification ...... for turbofan 10"

Zhang Zhenhua's fingers tapped the table with rhythm and gentleness:

"The 430 factory is supporting the 410 factory, which is not very nice to say, but it is not bad for us."

"Even if we have to modify the design process frequently, and the production finalization is delayed, it is still much faster than our closed-door construction compared to the schedule of the general consultant."

These words are more like he is convincing himself that there are other people in the 430 factory counterpart.

"I agreed!"

(End of chapter)