This is the case of the turbofan six of the year, after the project was proposed, it was quickly saved, and it was tested on the bench, which was a lot of precious time, and the technical problems could not be overcome, and finally it could only be hurriedly finalized and then dismounted.

The current turbofan ten, isn't this also going down this old path?

All aspects of the country are backward, in terms of aero engines, the gap is also the largest, after all, the aero engine is called the industrial field of Everest, you can know how difficult it is, even if the country does not know at first, and later through the research and development of turbofan six, you can also know how difficult it is.

At that time, it was originally planned to map and copy the turbojet-15 as the main power of the J-10, but such a turbojet engine, the thrust-to-weight ratio of only 6.5 of the second-generation turbojet, can not meet the needs of the third-generation aircraft, advanced turbofan engine is inevitable.

Moreover, at that time, there were still technical reserves of CFM-56 in China, so after careful analysis, there was a "lawsuit", and nine experts, a veteran of the aviation industry, jointly wrote a letter asking the central government to support the turbofan engine project. Later, the central authorities realized the shortcomings in the aviation development and decided to conduct preliminary demonstrations.

With the engine, there must be an installed object, after demonstration, it was determined that the prototype of the J-10 was equipped with turbojet 15, and the turbofan 10 was replaced in the later stage, until now, it is such an idea.

The J-10 fighter equipped with the turbojet 15, the rear fuselage is quite smooth, extending all the way to the back, without additional protrusions, and now although you just look at its large frame, you can imagine the overall shape of the aircraft, besides, there is the wooden prototype behind.

"Wouldn't you be a little impatient if you go to the stage now?" Qin Feng said.

"Yes, but if you want to catch up with the progress of our J-10 research and development, you have to be fast." Song Lao sighed and said, "At the last meeting, didn't you also propose to use the Su-27 engine?" This is a great stimulus for our domestic aero engine companies. ”

This matter has something to do with you! Hearing Song Lao's words, Qin Feng felt that his face was a little red, he just said whatever he thought of at that time, and it was indeed not professionally demonstrated.

If the Su-27 is introduced in China, the Su-27 engine will be used, so that the domestic engine will be unified, which is also good news for logistics.

"We have a preliminary understanding of the parameters of the Su-27 engine, and there is a big gap with the current turbojet-15." At this time, several people came to the rear of the fuselage, the noise in the workshop was slightly smaller, and the medical staff on the scene were organizing everyone to drink water and rest, and working like this for a long time was very harmful to the body.

Song Lao pointed to the rear fuselage and said, "First of all, the diameter of the engine is different. If we were to modify the engine with the Su-27, it would mean a major overhaul of the rear fuselage. ”

Turbofan and turbojet, the diameter is different, for Song Lao, the most hope is to be in place in one step, directly have a qualified turbofan installed, now use the turbojet 15 test flight, and then change the turbofan, that means that the body will be greatly improved.

This is also the reason why Song Lao is not interested in using the third uncle's engine.

Although the thrust-to-weight ratio is high, the three-aunt engine is not particularly fuel-efficient, and the life is not high, and the rear fuselage needs to be overhauled.

Not only the rear fuselage, but also the front air intake has to be greatly changed, because the flow of the intake does not match, the turbofan engine needs a higher flow rate, so that even if the thrust is large, but the windward area is larger, maybe the maximum speed will decrease.

Of course, there are some reasons, Song Lao will not say, if the Su-27 engine is introduced to assemble the J-10, what about the status of the turbofan 10? If the turbofan ten is squeezed out, maybe this project will be yellow again, then it is likely that there will be no advanced turbofan engine research and development capabilities in China.

From the point of view of the fighter designer, he hopes to have an advanced turbofan engine with high thrust, but from the point of view of the development of the entire aviation industry, the domestic engine will have a future.

Qin Feng nodded: "Yes, I still didn't think it through at the time, but I believe that my superiors will make the right choice." ”

The angle at which he stands is not high, but the superiors will consider it from a higher angle, and Qin Feng still believes in the superiors.

"yes." Song Lao let out a sigh of relief, and then continued to explain: "Our current turbofan ten is just a prototype verification machine, and there are no requirements for various indicators of life, as long as it can run stably. ”

If you directly say that the turbofan ten has come out, on the bench test, that is also incorrect, now on the bench, is just a verification machine, the indicators of the verification design are no problem, the engine can run smoothly, this is of course also from the previous turbofan six research and development experience, first verify whether it matches, reliability or something, and then talk about it.

On the last day of 88 years, this turbofan 10 verification machine was already on the ground, almost a year after the end of the demonstration, and this progress was very fast.

Now, their pressure is even greater, in the past, whether it was with a turbofan 10, or with a turbojet 15, it was a factory product, now, if the third aunt is used, it is completely introduced from the outside world, and it is a major blow to the research and development of domestic aero engines.

"Oh, I see." Qin Feng said: "In this case, then I really look forward to being able to take a look." ”

If there is such an engine in China and it can run smoothly, then there is no need to consider foreign ones.

Qin Feng also had expectations for this, but his time was also very tight.

The noise started again, and the technicians, after a little rest, began to fight again, for them, it was necessary to race against time, after all, the entire J-10 project was full of a sense of urgency, and under the pressure of introducing the Su-27, this sense of urgency was even greater.

"Let the comrades work hard." General Lin, who had been watching just now and didn't speak much, spoke: "The Air Force is full of expectations for Jian-10. ”

No matter how good the Su-27 is, it is also imported from abroad, and the J-10 is his own child.

The Air Force's heart is also clear that now the Air Force is obsessed with the Su-27, that is because the Air Force is in urgent need of modern fighters, and after the Air Force purchased the Su-27 and solved the urgent need, the Air Force will still attach importance to the J-10.

Therefore, when General Lin looked at the enthusiastic technicians, he needed to encourage them with words.