In fact, if you are willing to wait a few more years, after the US military invades Iraq in 2003, the GPS military positioning terminal will be all over the world by the Middle East villagers who have seized the trophy and the American GIs who resell equipment, which will directly lower the threshold of GPS interference by several grades.

So much so that after 2010, slightly high-end precision-guided weapons will have to engage in several additional terminal guidance methods to achieve composite guidance.

Of course, you can also simply make it impossible for you to interfere in the loop throughout the whole process, or hit the jammer at hypersonic speed.

In short, if there is no trickery, the hit rate is often miserable.

But Chang Haonan still hopes to put this equipment into use as soon as possible.

This device is a soft-kill weapon and is relatively less sensitive than an aircraft cannon.

But if used correctly, it can still have a very critical effect.

After sending Xu Yang out of the door, Chang Haonan returned to the office, picked up the receiver of the red telephone, and called the office of the Commission of Science and Technology.

At the same time, Ho Kyo, 603 Institute of Design Research Room.

A group of designers sit around a long conference table.

At the front of the room, there is a drawing board and a curtain.

With the promotion of digital design and manufacturing mode, the vast majority of research institutes and factories in the aviation industry system have begun to gradually bid farewell to the traditional ruler + drawing board.

However, after all, it is the collision of the old and new eras, and the human-computer interaction of computers and software in this era is not very in place, so it is obviously not realistic to go paperless in one step.

In particular, many parts that need to be redrawn on the spot are more convenient to use paper and pen.

That's why such a scene of combining the local and the foreign came to life.

Chief designer Tang Changhong stood up and came to the side of the curtain:

"Comrades, a few days ago, the 624 Institute has sent back the basic performance test results of the turbofan 9A."

"Combined with the performance of the new aviation engine, our next step is to specifically determine the improvement plan of the J-7A."

The research on the follow-up improvement of the J-7 has begun when the two J-7 were modified before.

However, the officially finalized J-7A must be a new mass production, so the depth of improvement must be much deeper than that of the old aircraft.

Among other things, the advances in aerodynamics, electronics, aviation materials and production processes over this period of time alone are enough to save up a completely new sub-model without significantly modifying the aerodynamic shape.

Therefore, after hearing the topic of the meeting, everyone present instantly cheered up.

Tang Changhong paused slightly, and then signaled the meeting assistant to switch the projected PPT content to the next page, and then gave up half of his body and pointed to the curtain with a telescopic whip:

"This is the index determined by the domestic turbofan 9A engine, in accordance with the requirements of the superiors, as well as the advanced experience of the brother units, we will try to improve the J-7A this time, and we will try to ...... around the engine."

He had prepared a long sentence, but in the middle of it, he realized that most people's attention was completely absorbed by the content projected on the screen.

I just let everyone enjoy it for a while.

"This is our completely domestic Spey?"

"If there is an engine, the delivery of the new machine should be guaranteed......"

In fact, the basic model of the J-7 was originally planned to be equipped with about 100 aircraft.

However, in the end, only two regiments were barely delivered, and a few were still owed, and they fell into a situation of insufficient supply of engines.

As a result, the investment of the Pickaxe Fei Group in this model has not been recovered for a long time, and everyone has lived a hard life for a period of time.

Now that I finally see an engine that can be made in China, it must be false to say that I am not happy.

But soon someone saw the specific performance part later.

Then, realize that the situation is not so simple......

"This turbofan 9A...... It seems that it is not just a domestic Spey......"

Everyone is a professional technician in aviation, and after being reminded like this, they naturally quickly discovered the difference:

"That seems like it...... Look at this sea level thrust, it has broken 10 tons? ”

"It doesn't matter if you almost have a little bit of thrust at sea level, you look at the envelope, especially the envelope with an altitude of more than 7,000 meters and a speed of more than Mach 1, compared to Spey, it's like two engines......"

"And the surge margin has also increased a lot......"

“……”

The performance of the turbofan 9A was definitely the biggest surprise at the beginning of 1998 for these researchers, who were worried about the lack of engine parts not long ago.

However, in the case of extreme surprise, people often can't help but suffer from gains and losses, and even doubt the authenticity of the event......

"Mr. Tang, the technical indicators of the new aviation development are determined to be able to ...... Stabilized? ”

Someone was the first to raise his hand and asked.

The research and development process of the old J-7 lasted for a long time, so that most of the people sitting here did not fully participate in the project establishment and index determination of the old model.

Moreover, the basic version of the J-7 uses the directly introduced Spey MK202, which is a very mature model, and it is not at all the same thing as the turbofan 9A that has not yet been finalized.

Otherwise, how can we say that aircraft design, power comes first.

In the event of a significant change in the specifications of the turbofan 9A, the design of the entire aircraft may be affected.

And this is definitely a real problem to worry about for the Huaxia aviation industry.

Or rather, almost every model has faced a similar situation before.

So it's normal to have concerns about that.

Tang Changhong nodded firmly:

"According to the information reported to us by Liming Group, the subsequent new technology will only be used as a technical verification of the turbofan 10, and will not be introduced into the improvement of the mass-produced turbofan 9A."

"So the technical state of the engine has been basically determined, and there will be no major upgrades."

The two sentences directly silenced the scene.

Obviously, what everyone is worried about is not the subsequent upgrade of other technologies.

However, the actual performance after installation cannot reach the performance on paper......

"No, Mr. Tang ......"

The person who just asked the question wiped the sweat from his head:

"I mean, there won't be any more problems with the progress of the engine, and the reliability, right?"

"The degree of improvement of this turbofan 9A seems to be ...... It's a bit radical......"

For the Huaxia Aviation Industry, which has imitated or localized dozens of different types of engines, the problem that everyone considered in the past was that the performance of domestic models could reach several percent of foreign prototypes.

Now I suddenly told that after the domestic production, the performance not only did not decrease, but also improved......

I didn't get used to it for a while.

Hearing this question, Tang Changhong was stunned for a moment, and then laughed dumbly.

He said in his heart that you haven't seen the technical indicators set by the 606 Institute for turbofan 10, otherwise you have to stare out your eyes.

In fact, when Tang Changhong first saw the data of turbofan 9A, he was a little unbelievable.

However, the pickaxe group said that this model was an improved model that Mr. Chang personally asked.

And then he didn't say anything more—

Although he has not directly cooperated with Chang Haonan, with his status as the chief model engineer of the Pickaxe Fei Group, he has always heard a lot of legends about the other party......

Of course, on this occasion, we must find some more reasonable reasons.

So, after briefly organizing the language, Tang Changhong replied:

"This is normal, in the process of improving the turbofan 9A, quite a lot of third-generation engine technology has been applied, so in the case of no major changes to the core structure, the maximum potential has been squeezed out, and the Spey MK202 is already a British model in the sixties and seventies, and it is reasonable to be more advanced than it."

"Moreover, this model has now entered the end of the high-altitude platform test, and so far, there have been no major problems, which is enough to prove that this is a relatively mature model."

"If nothing else, our 811, or 812 prototype at the latest, will be equipped with a turbofan 9A and a Spey for flight platform testing!"

(End of chapter)