When he heard this, Qin Feng immediately felt that his heart was beating violently, not only Qin Feng, but everyone else couldn't help but get excited in their hearts.

F404, one of the most advanced turbofan engines of this era, has a thrust-to-weight ratio of 8 orders of magnitude, and there is a gap of at least 20 years!

Now, this engine is already in front of you, and it will be equipped with the J-7 fighter produced by your own side!

Qin Feng glanced at Tu Lao, Tu Lao's eyes also showed longing, Tu Lao's life, almost all of them were put on the Jian-7 project, and now, this project is about to usher in a greater leap, with a new turbofan engine, not to mention anything else, just by replacing such an engine, the aircraft can be reborn, and it really has the foundation for fighting with F-16!

However, as we all know, this is not easy.

Even if the car is changing the engine, there are many things to consider, such as whether the engine compartment can be installed, whether it can match your own transmission system, etc., if you are not thoughtful, there will be all kinds of problems.

In addition to the volume of the aircraft, such as whether the diameter is the same, whether the length is the same, if it is not the same, it is impossible to change the outfit, the Americans in order to install the J79 on the F16, because the J79 is not thick enough, on the outside of the bread of a ton of more than a ton of copper hoops, and the matching problem of the intake tract, different engines, the intake flow is different, can not be simply interchanged, but also to modify the inlet tract, that is a big project, if not modified, From time to time, you have to face unexpected situations such as engine surge, which is extremely frustrating.

This is not as simple as replacing turbojet-7 with turbojet-13, but replacing turbojet with turbofan, and the characteristics of the two engines are different.

"I have specific information here, you can take a brief look at it first." With General Jamal's words, the adjutant began to distribute materials to everyone.

Qin Feng also got a copy of the information in his hand, this is the top secret internal information of General Electric Company, it seems that before they came, they had already passed the news with General Electric Company to be able to get this kind of information, which is definitely more precious than the information in those newspapers and magazines, and the data introduced in it is more real.

It is not easy to develop an engine, even for the technically strong Americans.

The information first introduces the origin of the F404 engine, from the sixties when the development of the F101 engine, this project began, General Electric reduced it to GE15, and then developed from GE15 to a continuously deflated turbojet engine YJ101, in 1975, when the Navy began the Hornet fighter project, this engine fully entered the research and development period, and in 1979, through the finalization, delivery began in 1980.

Most of the structures of this medium-thrust dual-ducted twin-shaft small-bypass ratio afterburner turbofan engine are the same as those of the YJ101, such as high-pressure compressor, combustion chamber and high-pressure turbine, while the fan, low-pressure turbine and afterburner are slightly amplified.

When this engine was developed, it paid attention to reliability and maintenance, the engine structure is simple, the left and right can be interchanged, and the surge margin of the high-pressure compressor is as high as 25%, and the US Navy is also miserable by the TF31 engine of the Tomcat fighter, and now pay attention to these indicators.

Qin Feng watched it with relish, while Tu Lao and the others looked at the more critical data, they looked at the various data introduced behind them in surprise, and found that it was simply tailor-made for Jianqi.

The volume of the engine is similar to that of the turbojet-7, it is easy to interchange, and the most important air flow is also about the same, which shows that the current layout of the J-7 nose air intake remains unchanged, and it is easy to replace this engine, with the smallest means of replacement, to achieve the greatest performance improvement!

General Jamal waited quietly, watching Tu Lao and the others see the last page of these materials before he said, "How is it?" Is there a technical difficulty? ”

"Yes, but it's not very difficult." Tu Lao said: "This kind of engine, as long as it is slightly improved, can be used in our aircraft. ”

As long as the volume and intake flow rate are the same, this is easy to change, because this engine is more than 100 kg lighter than the turbojet-7, so the counterweight of the nose can also be removed, which is definitely a good solution.

"Okay, since you think you can change it, then let's go on to say that in addition to the engine, there are some other improvement options." General Jamal said.

Changing the engine is the first major premise, and on the basis of changing the engine, we can talk about other improvements.

So, everyone continued to listen to General Jamal's words, and the expressions on their faces began to change again.

"With this engine, the fuel consumption rate is very low, but this is not enough, we want to increase the fuel in the engine, by 1,000 to 1,500 liters." After General Jamal finished speaking, he paused: "Of course, considering the difficulties, when necessary, it is okay to cancel an aircraft cannon and leave the extra space for fuel." ”

The internal structure of the J-7 has been almost excavated, and now, find another place to add a thousand liters of fuel? It's not easy!

"In this way, we will be able to further increase the combat radius, and we need an aircraft with a large combat radius, which will reduce the pressure on our air defense operations."

High endurance and large combat radius have many advantages, and in the case of the same number of aircraft, you can increase the patrol time in the air, which is economical.

A large number of air bases have been built in China and a large number of pilots have been trained, and if the endurance of the aircraft is doubled, then at least one-third of the air force can be reduced, and the combat capability remains unchanged, which is quite important.

If you don't have fuel again, you have to continue to think of a way, but in this way, the range of the J-7 can be greatly increased, even if you don't hang the auxiliary fuel tank, I'm afraid you can fly up to 3,000 kilometers, isn't this the standard of the F-16?

That's right, General Jamal almost took the standard of the F-16, and he desperately hoped that the J-7 fighter could be upgraded to the technical level of the F-16.

"In this way, the problem of the combat radius of the aircraft can be solved." General Jamal continued: "The second major item we want to be equipped with a radar with a downward view function, which allows our pilots to find low-flying targets, which is very important to us, and the current radar rangefinder is replaced by a new type of pulse Doppler radar. ”

When they said this, everyone looked at each other, and they wanted to stuff a big radar into the small space in the nose of the Jian-7 aircraft? Do you want to change the air intake layout, and change the nose air intake to two sides?

J-8 has been changed in this way, is there a major operation on the nose of J-7?