"Finally gone." The next day, I had another day of meetings with these people, and finally, Pelehaq and the others went back to the capital together, watching them get into the car, and finally someone let out a long breath.

The other party came here to coordinate scientific research projects, but there is always a time when everyone feels uncomfortable, especially, the other party has been saying how F404 is, it is the inevitable choice of J-8, everyone is tormented in their hearts, do you think we don't want to, this matter, we have to report it first, and it is still long.

"In addition to their F404, we still have our own projects." Mr. Gu said to Qin Feng.

Hearing Mr. Gu's words, Qin Feng took over the conversation: "Is this our turbojet-13?" ”

The turbojet-13 has already begun to be tested, and it won't be long before it can be put on the plane for test flights, although the increase is not very much, but after all, it can be regarded as an increase.

Hearing Qin Feng's words, Mr. Gu shook his head: "No, in addition to the turbojet-13, we also have a new project, the turbojet-14.The thrust is not low, and the maximum afterburner thrust can exceed 7 tons." ”

New project?

Qin Feng is very strange, if there is such a project, then how could Tu Lao never mention it before, if the thrust is greater, then it is obvious that it can be used by the Jianqi CP.

"Where's this engine?" Qin Feng asked.

"It's in our 606 Institute, and I'll take you to see it tomorrow." Mr. Gu said.

Qin Feng had been to the 606 Institute before, and he was still engaged in the turbofan six engine at that time, but now, the turbofan six has been dismounted, what about those people, has the entire research and development team been disbanded?

Qin Feng thought of this and couldn't help asking, "What about our team that studies Turbofan Six?" ”

"How do you know everything?" Mr. Gu suddenly glanced at Qin Feng strangely: "The one who is researching the Turbojet-14 now is the previous team, and it is still led by Lao Zhang." ”

At that time, the turbofan was discontinued, and the entire research and development team was scattered, and if there was no new project, more than ten years of experience would be in vain.

At this moment, everyone finally thought of something, this is to reserve an engine for J-7 and J-8!

Not to mention the turbojet-7, even the turbojet-13, the power is not enough, if there is an engine with more thrust, it would be even better, after everyone's efforts, this project was finally adopted.

At the same time, in order to reduce the difficulty of research and development, we decided to adopt a simpler method, simply put, to get the existing advanced technology in China, to save an engine!

What is there in the country now?

Turbojet-7, Turbojet-13, Turbojet-15, as well as Spey, and the dying turbofan-6, so everyone chooses from this.

The three-stage low-pressure compressor of turbojet 13 is used as the low-pressure and the first-seven-stage high-pressure compressor of Spey 202 is reduced to the ratio of high-pressure, and the high-low pressure turbine and combustion chamber are designed with reference to turbofan 6 and turbojet 15, so that the most advanced in the country is taken out, so that the progress should be faster, right?

These technologies have matured, and as long as you can save them together, you can directly test them.

In fact, it is also like this, from 1983 to put forward the plan, in 1984 to establish the project, in 1986 to produce the verification machine.

I don't know how this verification machine is, if this engine can run stably, then it can be installed on your own J-8 fighter.

In this way, the power problem is solved, although its fuel consumption rate is not low, but at least the thrust is strong enough, after all, the hope of introducing the F404 engine is too slim, or based on self-research is better.

Hearing Mr. Gu's brief introduction, Qin Feng's brows furrowed even more.

This plan sounds good, but if you think about it carefully, you will know that there is a big problem, for example, the most critical point, how to ensure its matching?

The West has never used this method, they have developed the core aircraft first, waited until the core aircraft was developed, and operated stably for tens of thousands of hours, and then improved into different aircraft through different duct ratios.

And is it okay to do this kind of research and development?

However, it seems that if you want to make it quickly, this is really a choice, if this kind of engine is suitable, it can also be introduced to Tu Lao, Tu Lao has been worried about the engine of the J-7 CP, if the international cooperation talks collapse, then do it yourself, you can only rely on the turbojet-13 temporarily, the thrust is still relatively small, and it should be enough to replace this turbojet-14, after all, the thrust of the F404 engine is only at the eight-ton level.

With such an idea, the next day, Qin Feng went to the 606 Institute with Mr. Gu.

Thinking about the time when he went there before, seeing the experiment of Turbofan Six, Qin Feng had a sense of foreboding.

In the distance, the roar of the engine was heard, and the characteristic howling of the turbine was mixed with the creaking sound.

"Abnormal engine noise!" Qin Feng said.

The engine of the fighter, even if there is a murmur, means that there is a problem inside, and it must be stopped to study, and sure enough, before the two of them can walk in, the roar of the engine disappears.

On the bench, the engine, which was about the size of the turbojet-7, stopped rotating, and the people around it surrounded it and said: "No, the high pressure and low pressure do not match, after starting, it will be like this for a few minutes, and it will not be able to run!" ”

Zhang Lao's brows were furrowed, this failure has been with them for a long time, everyone has tried all kinds of methods, thinking that it can be corrected, but no matter how it is done, it just doesn't match.

Low-pressure compressor and high-pressure compressor are two shafts, set together, this is the most common twin-rotor structure, except for the French M53 is the simplest single rotor, most of the military aircraft, are twin-rotor.

The high-pressure compressor rotates fast, the blades are small, the low-pressure compressor rotates slowly, the blades are large, and when the two are matched, the airflow will flow from the low-pressure area to the high-pressure area, if the two do not match, it will form turbulence in it, if it is light, it is abnormal noise, if it is heavy, it is surge, and even the engine blades are broken, and the engine is scrapped.

Now it's just a slow state, and if you put the throttle on the gas, there will definitely be a serious surge, causing the engine to not work at all.

Now, seeing Mr. Gu coming in with a few people, Zhang Lao shook his head helplessly: "No, it's still not good." ”

In the past, everyone thought that jumping up was the best, but now, this failure is seriously bothering everyone, what should I do?

"Can you tell me about the condition of our engine?" Qin Feng asked.

Many people know Qin Feng, after all, Qin Feng's name has spread, and now, after Qin Feng finished speaking, a designer on the side introduced Qin Feng.