Chapter 181 A few things about Turbofan 9
Although he didn’t quite understand why Chang Haonan was so interested in the domestic Sibei from the 430 factory, Zhong Shihong didn’t ask any more questions.
He knows that he should unconditionally support all decisions of the general technical consultant.
At least that is the case if it does not seriously affect the interests of Factory 410.
So that night, the two of them met in a small conference room with several technical backbones sent by the 430 factory.
Zhang Zhenhua spread some technical materials he brought on the conference table.
"General Counsel Chang and Director Zhong, the main work our factory is currently doing is to strive to localize the SPEI MK202 engine introduced in the past in accordance with the deployment of superiors. This model is currently planned to be named turbofan 9'Qinling'."
"At present, the navy and air force aviation forces recognize the combat capabilities and cost-effectiveness of the JH-7, and hope to equip more aircraft of this type, so the number of turbofan 9 equipment in the future There should be a lot.”
“…”
He spent a few minutes briefly introducing the situation of the Turbofan 9 project.
Of course, this link is mainly for Chang Haonan.
After all, he is only in his early 20s, so normally he shouldn’t know much about things in the late 1970s.
Chang Haonan was also happy to take some time to listen to it, otherwise it would be difficult for him to explain where his knowledge of Turbofan 9 came from.
Besides, there are some secret history-level things in it, which he did not know before.
In short, Zhang Zhenhua’s idea is to directly purchase the equipment or engage in cooperative research and development through investment. First, he can imitate the original Sibei MK202 to solve the urgent need of the JH-7, and then if Chang Hao Nan still has extra energy, so it would be best to give the Turbofan 9 a radical improvement just like it did the Turbojet 14.
"Hmm..."
Chang Haonan looked at the information about Sibei on the table and did not immediately give a positive answer. Instead, he touched his chin and thought for a while.
This moment of hesitation made Zhang Zhenhua, who was sitting opposite, feel nervous again after he had just relaxed a little.
Fortunately, he studied the previous experience of this general counsel in the afternoon and found that the latter had participated in the formulation of a series of independent aviation industry standards and seemed to have a strong obsession and persistence in self-reliance.
This kind of people are often the most disdainful of the argument that building is worse than buying rather than renting.
So he gritted his teeth and continued:
"Many people now have the opinion that they should go directly to Rolls-Royce to buy hundreds of Spey engines for the JH-7, but we still feel that, It is somewhat unreliable to rely on purchasing such core equipment that affects national defense security from abroad, especially from Western countries."
Of course Chang Haonan knew that the other party was trying to provoke him. He immediately waved his hand:
“Don’t worry, I will definitely support pushing the turbofan 9 forward.”
“But the specific operation is still somewhat different from what you think. ”
Zhang Zhenhua felt that he needed to keep some quick-acting heart-saving pills on hand.
"What do you mean..."
Chang Haonan organized the language slightly:
"No matter who was right or wrong in the debate in the 1970s, from now on From a perspective, the technology of SPEI MK202 has indeed lagged behind.”
“Except for the two indicators of military fuel consumption and maximum thrust on paper, SPEI’s performance is not even as good as that of the finalized vortex. Spray 14A”
"And more importantly, its upgrade potential has been squeezed out. The ring-tube combustion chamber and excessive bypass ratio have fundamentally limited its performance in fighter jets."
"So, the only use of this model at present is to be equipped on the JH-7 model."
After hearing this, Zhang Zhenhua nodded helplessly.
Although he is unwilling to admit it, what Chang Haonan said is all true.
Sibei's design is really too old, and even in the era when it was first introduced, its performance was very average. Its thrust at medium and high altitudes is not even as good as the turbojet 7.
It is also for this reason that the overall performance of the British version of the Phantom-F4K fighter equipped with a turbofan engine is not as good as that of the American version of the late-model Phantom equipped with a J79 turbojet engine.
Twenty years ago, it could be said that Spey's design concept was at least advanced, but now, especially after the emergence of the turbojet 14, the situation has changed.
At this time, Chang Haonan changed the subject, first suppressing and then rising:
“But what you just said is right, the domestically produced Sibei, or turbofan 9, is for For the JH-7, it plays an irreplaceable role.”
"So, I hope to use a more efficient way of resource utilization to help you build the Turbofan 9 and carry out subsequent upgrades."
Although there is no such concept yet, 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 heat was almost over, Chang Haonan revealed his ultimate goal:
"I hope to use the Turbofan 9 project to verify some manufacturing technologies."
"Technical verification?"
This statement made Zhang Zhenhua look a little confused,< br>
“Neither Qinling nor Kunlun can meet the needs of third-generation fighter jets, so the project to develop third-generation high-thrust turbofan engines must be put on the agenda as soon as possible.”
Chang Hao Nan stood up and paced slowly while giving an explanation.
Not only for Zhang Zhenhua, but also for Zhong Shihong.
“We must admit that we lack too much technology in this area. With our current capabilities, it is difficult to complete even the design work, let alone other parts that follow.”
"But if we have to wait until the preliminary design of the turbofan 10 is completed and we start to solve the manufacturing problems when we start manufacturing the engineering prototype, then the cycle is a bit too long, and the time spent focusing on the design is equivalent to a waste. Halfway through.”
“So I plan to synchronize these two processes, or nearly synchronize them. While improving the design plan, I will also incorporate some new technologies that may be used in the production of turbofan 9. Verify and improve during the process of improvement. ”
“According to my thinking, the design of Turbofan 9 should not change much compared to SPEI MK202, but with the advancement of our manufacturing technology. , it may gradually use a series of new things such as precision-cast casings and fans without margins, single-crystal turbine blades made of new materials, etc. Of course, in this process, its performance will definitely be improved compared to the original version. ”
Zhang Zhenhua understood.
Zhong Shihong also understood.
Chang Haonan is playing a big game.
At the expense of slightly sacrificing the design finalization progress of turbofan 9, we ensure that the more important turbofan 10 will achieve higher research and development efficiency.
If everything goes well, it can even be transferred to the small batch production stage immediately after the design is completed, and the time required for production finalization will be greatly shortened.
"Using Turbofan 9 as a verification of Turbofan 10..."
Zhang Zhenhua's fingers tapped the table gently rhythmically:
"Factory 430 is supporting factory 410. This piece It doesn’t sound good to tell the story, but it doesn’t do any harm to us.”
“Even if the design process needs to be modified frequently and the production finalization is delayed, it is still compared to the timetable of General Counsel Chang. , It will definitely be much faster than us working behind closed doors.”
These words are more like he is convincing himself and other people in the 430 factory.
"I agree!"
(End of this chapter)