This time, when Chang Haonan's voice fell, the entire venue was almost completely silent.

You can even hear the sound of swallowing saliva clearly.

When the J-10 was originally designed, the use of the turbojet 15, that is, the domestic model of the R29 (the engine of the later version of the MiG-23) was indeed considered.

However, after the transfer to the full-fledged R&D process at the end of the 80s, the target installed power soon changed to the AL31FN, which is more realistic, better performing, and basically identical to the Su-27, another third-generation aircraft equipped by the Air Force.

Although it is only a standard third-generation turbofan engine, for the Huaxia aircraft designers at that time, this engine with a military thrust of 7.5 tons and an afterburner thrust of 12.5 tons at sea level is definitely a dream machine.

"Also, I can reveal a little more."

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Compared with the current model, it is also an increase of more than 10%.

But......

"Comrades of Project No. 10, the reason why I chose to come at this point in time is because the overall design of the turbofan 10 engine has been determined, and all components have completed trial production and component-level testing."

Like a fish in the sea, a bird in the sky.

"Comrade Haonan, this engine ...... Are you sure you can catch up with the timing of our No. 10 project? ”

In other words, the performance indicators reflected in this are not empty design parameters, but ...... It has been verified. ”

"At present, all the parts of the turbofan 10 can be produced in our country, so ...... There is no need to worry about the problem of being cut off in production. ”

So, he adjusted his sitting posture and replied solemnly:

"The parameters of the final product may still be fine-tuned, but it is unlikely that there will be any major changes."

To put it simply, it is all-round encirclement.

When he said the last sentence, the atmosphere that had gradually tensed up just now relaxed again, and even erupted into a few light laughs.

Just as the most hated by the workers is the boss who draws the cake but can't realize it.

However, after all, the turbojet 14 can only be regarded as a second-generation medium thrust, which does not meet the basic requirements of Project 10.

You must know that the latter is already a model in the third generation of engines with a significantly more supersonic and afterburner performance orientation.

In fact, if you compare it with the turbofan 10A with slightly lower thrust prepared for the J-11, then even the afterburner fuel consumption is significantly lower than that of the AL31FN.

But after seeing the data of the turbofan 10 on the PPT, there are even people who are imagining whether they can use this as a driving force to develop a fourth-generation fighter, and if they use the old model again, it will be too uncomfortable.

Therefore, it is normal to have this unbelievable sense of unreality.

Chang Haonan pondered for a moment, but still shook his head:

After such a round of Q&A, the entire conference room finally returned to its previous working state.

Who would have thought, or who would dare to think, that Huaxia would have a kind of three-and-a-half-generation aviation at their fingertips?

“……”

In short, for these technicians in the field, the upper limit of the engine performance they could get in their concept before today was the AL31FN that was currently installed on two prototypes.

About two minutes passed, and there was still no one in the entire room.

And this kind of self-confidence will also imperceptibly infect others on the scene.

"For example, the Americans' F22, the combat radius is lower, and they can also make up for it with their hundreds of air tankers, and our Huaxia Air Force cannot have such a large tanker fleet in a short period of time, so ...... It is still necessary to maintain a basic range. ”

There is nothing that people fear more than to have hope once and then it will be shattered.

"When designing this engine, considering that the aerodynamic design of the third-generation aircraft was not optimized for long-term supersonic flight conditions, I still have to take into account the subsonic working conditions in most cases, and there is no way to set the afterburner speed under the afterburner too high, otherwise it will lead to the economic fuel consumption of the aircraft not going down, thus affecting the available combat radius, which is even more important for a medium-sized aircraft like our No. 10 project."

Before Chang Haonan just cut out this page of PPT.

It's also related to technology, but it's not my own project after all, so it's much easier to talk about.

And its supporting power, and now it has been installed on several other models of the turbojet 14, also proves that Huaxia has the ability to design and manufacture a high-performance aviation engine.

2605: F700: 43: 6000:: 6c7

"This military thrust ...... It shouldn't be enough to use only one unit for Project 10, but if two units are installed on Project 11, is it possible to cruise at supersonic speed......

After a long time, Song Wencong finally opened his mouth to break the silence that had lasted for too long.

"In short, on the issue of power, you can rest assured, I, as well as my colleagues in the field of aviation power, guarantee that we can provide a strong heart for our third-generation aircraft in China!"

Still, he chose a slightly less relevant topic as an introduction.

This means that although this model is enhanced for high-speed conditions, it still maintains a fairly balanced performance.

The usable thrust after installation is even lower.

Before today.

It was not until the J-8C entered service two years ago that it was considered to have a fighter that surpassed the fighter-bomber.

Before you know it, everyone seems to be sitting a little straighter than before......

On the PPT page that Chang Haonan turned to, a table and two performance curves clearly reflected the difference between the turbofan 10B and AL31FN.

Someone below raised his hand and asked.

"In fact, the only problem at present is that domestic refining and chemical companies cannot immediately come up with aviation fuel that meets the requirements of this engine and is of a high enough standard...... Of course, I have also reported this problem to the logistics department, and they promised to solve the problem within two years. ”

Including the Taihang engine, when it was originally planned, it was also a model with basically similar performance and in-situ replacement.

"If I have to say, at certain altitudes, and with a clean load, it is possible to reach a flight speed of about Mach 1 without afterburner...... Not to mention the double-engine J-11, even the J-10 is possible. ”

The calm and serious tone made Chang Haonan reveal a natural confidence when he spoke.

That's it, the J-7 that was finally built was the model with the best air combat performance among the domestic aircraft in China for a long time.

Originally, if I had been using the AL31FN, I wouldn't have felt anything.

Again, the result of optimizing the sea level data.

Chang Haonan's eyes swept over the crowd at the scene, and after a pause, he continued to increase:

But a high-performance aviation engine will definitely bring more freedom to the whole project, allowing aircraft designers to maximize their talents.

No one wants to break the feeling that everyone is immersed in happiness at this moment.

And Chang Haonan, who was sitting on the stage, just smiled.

In other words, compared with those three-and-a-half-generation engines that have squeezed their potential dry, the turbofan 10 in front of them, although the performance on paper is basically in the middle of the middle, has not yet begun to exert power......

For two years, this was one of the questions he heard almost most often.

What's more, the military thrust of the turbofan 10B is also 8.4 tons.

With the exception of slightly higher afterburner fuel consumption due to higher afterburner thrust and afterburner speed, all performance is a visible advantage.

This feeling of being free from restraint highlights a comfort.

Although aircraft design is a complex system engineering, it cannot simply be assumed that the better the power, the better the performance of the final aircraft.

You must know that the best engine used in Huaxia at that time was the Spey imported from the United Kingdom, with a thrust of 9 tons, and the actual thrust-to-weight ratio was not even 5.

Even the F110-GE-129EFE and AL41, which are half a generation ahead, dare not say that they can surpass in this regard.

Chang Haonan said and flipped the PPT to the next page, returning to the overall design of the No. 10 Project II prototype.

Only this time, no one will question the feasibility of this improvement idea.

Everyone could already foresee that a fighter that was more advanced and more comprehensive than the original would be born in their hands.

(End of chapter)