The Military-industrial Scientific Research System of the Academic Master Chapter 536

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 use several additional terminal guidance methods to achieve composite guidance.

Of course, you can also simply have people in the loop the whole time so that you can't interfere, or use hypersonic speed to hit the jammer at lightning speed.

 In short, without some uncanny 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.

If nothing 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.

 “Is this our completely domestic Sibei?”

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

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

But 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.

 That's why there was such a scene of combining the local and the foreign.

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

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 turbofan 9A.”

 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.

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

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 completely go paperless in one step.

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

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

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

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

 Now that we have finally seen a domestically produced engine, it would be a lie to say that we are not happy.

 Let me just let everyone enjoy it for a while.

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..."

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.

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

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 Spey..."

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

“It seems true... Look at the thrust at sea level, it's over 10 tons?”

“The difference in thrust from sea level doesn't matter at all. Look at the envelope, especially the envelope at altitudes above 7,000 meters and speeds above Mach 1. Compared with Spey, it's like two engines..."

   “The surge margin has also been increased a lot...”      …”

  The performance of Turbofan 9A was 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 their 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 not fully participated in the steps of project establishment and indicator determination of the old model.

Furthermore, 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.

 This is definitely a real issue for China Aviation Industry to worry 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 technology will only be used as a 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.”

 Those two sentences immediately silenced the scene.

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

 It's just that 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 could reach that of foreign prototypes.

Now I suddenly heard that after being made in China, the performance not only did not decrease, but actually improved...

 It was hard to get used to it for a while.

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

He said to himself that those are the technical specifications set by Mr. Chang from the 606 Institute for turbofan 10. Otherwise, you would have to stare out your eyes.

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

  However, 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 status as the chief model engineer of 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 1960s and 1970s, 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 prototype No. 811, or at the latest No. 812, will be equipped with a turbofan 9A and a Spey in series for flight platform testing!”

 (End of this chapter)

Chapter end