The expert surnamed Sun was stunned for a moment, and then looked at the high-level military generals for a while with a touch of trepidation, which made his heart instantly cold: most military generals looked at him with disgust, especially in the Air Force, that Mu Guang is no longer even able to describe the disgust, he is simply speaking: just such an old thing, he doesn't understand anything, he doesn't understand anything, and he can become a famous aero engine expert in our country?!

The face that was still pale just now instantly became bloodshot! Only then did he react, Lin Hongfei didn't answer his words directly just now, it wasn't that he was out of words, but that this little bastard deliberately dug a hole for himself! I saw that I jumped straight without even looking at it!

He wanted to say something to redeem the current decline, but Lin Hongfei was ahead of them, "I know that this time our comrades in the army have brought a lot of technicians and engineers who are very experienced in the maintenance of D-30K...... When it comes to the familiarity of the military and the military-industrial system with the D-30KP, I don't think anyone is more familiar with it than them. ”

"It's a good idea, let our own people be judged." The commander-in-chief of the Air Force immediately spoke, and his eyes were full of appreciation when he looked at Lin Hongfei: The kid's confidence seems to be very strong.

……………………

The technicians and engineers who were temporarily transferred by the Air Force and were very good at D-30KP quickly rushed over, and this level of technical verification was not something that could be concluded by the two sessions for a while, but it did not prevent them from coming to a general conclusion in a short period of time: "Chief of the report, judging from the information we have seen cursosoly, the difference between D-30KP and D-30KU is indeed not big...... For example, the difference between KP and KU is like the same car engine. Some models need to perform a little better at higher revs, while others need to perform a little better at starting and low to mid speeds, depending on the requirements...... Comrade Lin Hongfei is an expert in this regard, and the same engine can be tuned to meet different needs. ”

"Of course, there are subtle differences," another engineer adds, "such as the change of a single-cylinder four-valve to a single-cylinder two-valve, such as the coordination between the stroke of the piston and the opening and closing of the valves, just like the engine is tuned differently according to different needs, and the turbine certainly doesn't have cylinders or anything like that, but that's the general meaning." In general, there is not much difference between KP and KU, but the specific differences are those that require a relatively long period of work. ”

So that's it!

Most of the leaders here don't understand that the aero engine is too technically contented. But when it comes to internal combustion engines, use the analogy of internal combustion engines. That's much easier to understand.

"No need. Go down, comrades, for your hard work. The commander-in-chief of the Air Force waved his hand, he just needed to know whether the difference between KU and KP was very big, as for how big the difference was, he didn't care, he needed to know that the difference between KU and KP was just similar to "different tuning made by the same engine for different use needs".

"It's not hard." Several technicians and engineers hurriedly waved their hands.

"So how big is the difference between KP, KU and 30F-6?" The commander of the Air Force asked. That's what he's most concerned about.

As the "queen" engine of the MiG-31, the D-30F-6 engine does not have an afterburner of 93.1KN and a maximum afterburner thrust of 152KN, which is covetous to the leaders of the Air Force, although the weight of the D-30F-6 is indeed a little larger, and the engine does not use the vector nozzle that is currently the most popular in the world and will become the mainstream in the future. But in the face of the huge thrust of 152KN, it is enough for the military to ignore the huge differences in other aspects...... Our fighters do not need to be as tall and fast as the MiG-31, but the enormous benefits of high thrust are self-evident.

It's just that as soon as the Air Force Commander said this, several engineers and technicians looked at each other, quietly, and no one spoke for a while.

"What's going on?" The face of the commander of the Air Force was a little unbearable.

Although he is not naïve to think that the difference between D-30F-6 and D-30KU and D-30KP is only the difference in the bypass ratio, what does your expression mean?

The chief was unhappy, not to say no, a group of technicians and engineers glanced at each other, and one of the most respected old engineers stood up, "Chief, the difference between the KU and KP series is small, because the initial design of the KU and KP series is to be used as the power of the transport type of aircraft, and its flight envelope is almost the same, so the difference between the two engines is very small, and even in the absence of KP, it is not a big problem to install KU on the Il-76, but D- 30F-6 is a different story entirely. ”

"At the beginning of the design of this engine, it was used for high-altitude and high-speed interception operations, and it was somewhat similar to the use of turbojet in terms of use, and in the current retired and active military turbofan, his bypass ratio was the smallest, only 0.4, and the only purpose of doing so was that the R-15B-300 turbojet of the MiG-25 was too fuel-consuming, and the degree of fuel consumption could not even be supported by Lao Maozi, so he had to use this relatively fuel-saving D-30F-6 with better fuel-saving effect."

"But in general, because the initial design is used as the power of high-altitude and high-speed interceptors, this engine can not be directly moved to our fighter jets, and it is not impossible to use it as the power of multi-functional fighters, and it can even be regarded as a very strong power, but there are many things that need to be improved, fuel economy, bypass ratio, reliability, easy maintenance and many other aspects need to be worked on."

"So much change?" The head of the Air Force Armament Department was a little chilled when he heard this, and immediately asked anxiously, "Is there a big difference between the core aircraft and the KU and KP?" ”

The engineer's words gave him confidence: as long as the engine could be modified and used in a multirole fighter, it would be good news; But at the same time, it also made him a little worried, if this engine changes a lot, will it be beyond our ability? Can we catch up with the speed of equipment of our military aircraft in time?

"The basic structure of the core machine is 80% the same as that of KU and KP, but many parts seem to be different from KU and KP in terms of materials." The engineer was helpless, "The main thing is the difference in materials...... Of course, as long as you put in a lot of effort, you will definitely be able to catch up with the development plan formulated by the Ministry of Defense, eh? ”

Speaking of this, the engineer's eyes suddenly lit up, and he suddenly remembered another thing, "Mr. Lin, I heard that your company has obtained a large number of technical materials from Russia over the years, among which materials, especially aviation materials, account for a considerable proportion, isn't that the case?" ”

This man's ears are good enough. Lin Hongfei smiled bitterly and nodded, he had a bad premonition in his heart, he seemed to have been fooled?

After receiving an affirmative answer from Lin Hongfei, the engineer immediately became excited, "If Mr. Lin has the process technology data for most of the materials used to manufacture the core machine." That's a lot simpler, it really is. In order to Lin Zong, their company's R&D and work efficiency. I believe what Mr. Lin said before: the test run of the D-30K at the beginning of 97 should not be a problem, as for the goal of transforming the D-30F-6 into an engine used in a multi-role fighter......"

He pondered for a moment and gave a figure that I don't know whether it should be considered conservative or radical, "If you want to make overall progress in terms of fuel consumption, economy, maintainability, overhaul intervals, and the life of the whole machine, the most important thing is to make it not only have good high-altitude and high-speed characteristics." It also has the characteristics of good low altitude and low speed, and at the same time reduces the weight of the engine, which can be difficult and arduous, I personally estimate. Being able to come up with a prototype by 2004 is considered a great success, and even being able to come up with it during '09 can be called a 'great achievement'. ”

Improve the D-30F-6 so that it can come up with a prototype within 10 years on the premise of meeting the requirements for combat use in the next 30 years? If it weren't for the fact that this was put forward by a god-level technical elite within the Air Force and even the leaders of the Air Force, the chief of the armament department and the commander of the Air Force would have almost directly rebuked this remark: "Ridiculous!" But since these words came out of Tianya's mouth......

"Mr. Lin, are you sure?" The head of the Air Force pondered for a moment and asked Lin Hongfei.

"Chief, we can't answer you," Lin Hongfei smiled bitterly, "Aero engine is a highly complex, huge and abnormal system engineering, its difficulty is even more than manufacturing a fighter jet, which requires the cooperation of many factories, scientific research units and scientific research personnel, if everything goes well, there is absolutely no problem with coming up with a prototype in 04, I Lin Hongfei will dare to make a military writ with all my property and income now, but if it is like this, the first thing that comes to everyone's mind is their own small departmental interests... He smiled bitterly, "It's really Amitabha Buddha to be able to come up with a prototype in 09." ”

Lin Hongfei's words are indeed not nonsense, with a suitable engine, it is not difficult to create an excellent fighter from scratch on the basis of this engine, but if you want to make an excellent military turbofan engine from scratch, the difficulty is not only two or three times higher?

The eyebrows of the air force chiefs were immediately twisted into the word "Chuan"!

Lin Hongfei's words are right, as long as everyone cooperates closely with each other and has enough time and financial support, this is indeed not a problem, but the most rare thing is this, look at the attitude of AVIC First Group, this is nothing, just people almost hit a dog brain in their heads, counting on a group to close them and their two groups? The difficulty is almost as good as daydreaming.

However, the Air Force obviously cannot control the head of the AVIC First Group, which is another independent system, and strictly speaking, it can be regarded as the "nutrition provider" of the Air Force, and the relationship and interest entanglement are even more intertwined, since it is not the direct superior of the AVIC First Group, it is naturally impossible for the Air Force to directly order the AVIC First Group to unconditionally cooperate with Lin Hongfei's research work...... AVIC First Group also has a big opinion: why? Our group also has a lot of research tasks, okay? How about your two groups cooperate well with our first group?

"Comrade Hongfei?" The chief of the air force instinctively and subconsciously looked at Lin Hongfei first, and when it was impossible for the first group to compromise, the first thing the chief of the air force thought of was to let Lin Hongfei's second group compromise with the first group...... No way, who made Lin Hongfei look young and easy to bully?

"Please rest assured that the Second Group of AVIC has the confidence and determination to complete the task of developing and improving this engine within the time frame of the entire Air Force development plan." Lin Hongfei made a guarantee without hesitation. At the same time, he also rejected the unreasonable request of the Air Force in this way: Do you want me Lin Hongfei to bow to those grandchildren of a group? Are you kidding?

"That's right, everyone eats according to their abilities, the reason why the head of the Military Commission divided AVIC into two is not to hope that everyone will compete with each other and accelerate development in the competition, Comrade Lin Hongfei, you can rest assured, our HNA side will definitely vigorously support your two groups!" The head of HNA, who had not spoken before, spoke.

The relationship between Xifei and HNA is a little bigger, and the use of the J-7 makes HNA very satisfied, and the leaders of HNA, who have long been worried about the status quo of the Eighth Master, who is suitable for high-altitude and high-speed interception operations, are about to lose their hair, and now they finally have a good fighter-bomber available.

In particular, after the news that the H-6 can be replaced with a D-30KP turbofan engine with greater thrust and more fuel efficiency, the leaders of HNA are even more excited: in the past, because HNA's fighters generally had short legs, it was difficult to form an effective deterrent and deterrent to the Nansha and Xisha waters, not only did some clowns jump around there, but HNA almost broke the backbone, and now it is okay, if the H-6 engine is replaced with D-30KP, the combat radius is as high as 3300 kilometers. If you combine it with anti-ship missiles and long-range cruise missiles under development, look at how those beam-jumping clowns are still bouncing!

The current leaders of HNA look at Lin Hongfei as pleasing to the eye, how can they let Lin Hongfei be bullied?

"Tsk......"

Seeing that Lin Hongfei resolutely refused to back down, and that the HNA side was afraid that the world would not be chaotic, the air force chiefs sighed heavily: Nima, what is this called! (To be continued......)