Chapter 536: Turbofan 9A finally survived

In fact, if you are willing to wait a few more years, after the US military invades Iraq in 2003, GPS military positioning terminals will be used all over the world by fellow Middle Easterners who have seized trophies and American soldiers who resell the equipment, directly interfering with GPS. The threshold has been lowered several levels.

So much so that after 2010, slightly higher-end precision-guided weapons had to implement several additional terminal guidance methods to achieve composite guidance.

Of course, you can also simply be in the loop the whole time so that you can't interfere, or hit the jammer at hypersonic speeds with lightning speed.

In short, without some magic skills, the hit rate is often terrible.

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

This kind of equipment is a soft-kill weapon and is relatively less sensitive than aircraft cannons.

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

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

At the same time, in the design research room of Institute 603 in Haojing.

A group of designers are sitting around a long conference table.

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

With the promotion of digital design and manufacturing models, most 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 the new era, and the human-computer interaction of computers and software in this era is not very good, so it is obviously not realistic to go completely paperless in one step.

Especially for many parts that require on-site modification, it is more convenient to use pen and paper.

That's why there was such a scene of a combination of earth and foreign countries.

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

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

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

Research on subsequent improvements to the JH-7 has already begun when the two JH-7s were modified.

However, the officially finalized JH-7A is definitely a brand new mass production, so the depth of improvement must be much deeper than the upgrade of the old aircraft.

Not to mention anything else, the advancements in aviation power, electronic equipment, aviation materials and production processes during this period alone are enough to create a new sub-model without significantly modifying the aerodynamic shape.

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

Tang Changhong paused for a moment, then signaled the conference assistant to switch the projected PPT content to the next page, then gave up half of his body and pointed at the curtain with a telescopic pointer:

"This is the determined indicator of the domestic turbofan 9A engine. In accordance with the requirements of superiors and the advanced experience of our brother units, our improvements to the JH-7A this time will try to focus on the engine..."

He had originally prepared a long sentence, but only halfway through, he found that most people's attention had been completely attracted by the content projected on the screen.

Just let everyone enjoy it for a while.

"Is this our completely domestic Sibei?"

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

In fact, the original plan was to equip about 7 of the basic model JH-100s.

However, in the end, only two regiments were reluctantly delivered and a few more aircraft were owed, and they fell into a situation of insufficient engine supply.

As a result, the Haofei Group's investment in this model was not recouped for a long time, and everyone had a hard time.

Now I finally see an engine that can be made in China. It would be a lie to say that I am not happy.

But soon someone saw the specific performance part behind it.

Then, I realized that the situation was not that simple...

"This turbofan 9A... seems to be more than just a domestically produced Spei..."

We are all aviation technicians. After being reminded like this, we naturally quickly discovered the difference:

"It seems to be true... Look at the sea level thrust, it actually exceeds 10 tons?"

"The difference in thrust at sea level doesn't matter at all. Look at that envelope, especially the envelope at altitudes above 7000 meters and speeds above Mach 1. Compared with Spey, it's like two engines..."

"The surge margin has also increased a lot..."

"..."

The performance of Turbofan 9A is definitely the biggest surprise at the beginning of 1998 for these researchers who were worried about insufficient engine parts not long ago.

However, when people are extremely surprised, they often cannot help but worry about gains and losses, and even doubt the authenticity of the event...

"Mr. Tang, are you sure that the technical indicators of the new aviation engine can be... stabilized?"

Someone raised his hand first and asked.

The development process of the old JH-7 lasted for a long time, so much so that most of the people sitting here have actually not fully participated in the steps of project establishment and indicator determination of the old model.

Moreover, the basic version of the JH-7 uses the directly imported Spey MK202, which is a very mature model and is completely different from the turbofan 9A that has not yet been finalized.

Otherwise, in aircraft design, power comes first.

If the specifications of Turbofan 9A change significantly, the design of the entire aircraft may be affected.

For China Aviation Industry, this is definitely a real issue that needs to be worried about.

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

So it is normal to have concerns in this regard.

Tang Changhong nodded firmly:

"According to what was reported to us by Liming Group, the subsequent new technologies will only be used as technical verification for the Turbofan 10 and will not be introduced into the improvement of the mass-produced Turbofan 9A."

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

The two sentences immediately silenced the scene.

What everyone is worried about is obviously not other subsequent technological upgrades.

But the actual performance after installation cannot meet the paper performance...

"No, Mr. Tang..."

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

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

"The degree of improvement of this turbofan 9A seems... a bit radical..."

For China Aviation Industry, which has copied or localized dozens of different types of engines, the previous question everyone considered was how many percent of the performance of domestic models can reach that of foreign prototypes.

Now I am suddenly told that after domestic production, not only did the performance not decline, but it actually improved...

I didn’t feel comfortable with it for a while.

Upon hearing this question, Tang Changhong was stunned for a moment, and then burst into laughter.

He said to himself that you haven't seen the technical specifications set by Mr. Chang of the 606 Institute for the turbofan 10, otherwise you would have to stare out your eyes.

In fact, when Tang Changhong himself first saw the data of Turbofan 9A, he was a little unconvinced.

However, the Haofa Group stated that this model is an improved model that Mr. Chang personally consulted.

Then he said nothing more——

Although he has not directly cooperated with Chang Haonan, given his position as the chief model engineer of the Haofei Group, he has heard many legends about the other party...

Of course, in this situation, we must still find some more reasonable reasons.

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

"This is normal. In the improvement process of Turbofan 9A, quite a lot of third-generation engine technology was applied. Therefore, without major changes to the core structure, the maximum potential was squeezed out as much as possible. Besides, Spey MK202 has already It’s a British model from the s and s, so it’s reasonable to be more advanced than it.”

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

"If nothing goes wrong, our No. 811, or at the latest No. 812 prototype, will be equipped with a turbofan 9A and a Spey in series for flight platform testing!"