Chapter 1204 Blueprint for the Next Generation Fighter
As Chang Haonan finished speaking, the PPT was turned to the second page.
On it was a schematic diagram of the aircraft engine structure and a fairly simple table -
"Fourth-generation fighter benchmark engine performance indicators"
Thrust-to-weight ratio: ~10
Bypass ratio: 0.3-0.4
Fan pressure ratio: 3.8-4.5
High-pressure compressor single-stage pressure ratio; 1.08-1.46
Total boost ratio: ~25
Turbine pre-temperature: ~1850K
Afterburner thrust: 150-155kN
Intermediate thrust: 95-100kN
…
The turbofan 10 left enough room for upgrading the fourth-generation power, which many people knew.
But almost no one thought it would be enough to this extent.
The data in front of us is almost on par with the F119PW100 engine used on the F22.
Although there is a certain gap in aspects such as fuel consumption, it is more due to different performance choices rather than absolute backwardness in technology...
If the previous page of PPT can still be regarded as a pie that Chang Haonan drew for everyone.
Then this table, even if it cannot reach the level of making a pie, at least it can be regarded as seeing the dough, the dough board and the rolling pin.
For a moment, the entire venue, including Song Jiaxiang, felt that happiness came too suddenly and was caught off guard...
"Academician Chang, this... should still be the modified WS-10... right?"
Song Jiaxiang asked with a somewhat uncertain tone:
"I mean, in terms of the development schedule..."
Chang Haonan naturally understood what he meant, and immediately nodded and replied:
"Generally speaking, the third-generation fighter engine is limited by its basic structure and cannot meet all the requirements of the fourth-generation fighter for the power unit through simple improvements, so a new fourth-generation power needs to be developed."
"But because of the special situation of WS-10, we don't have to go through the development process again, but can make modifications based on it... I personally suggest that, at least in the development stage, we call this power WS-10G, which can confuse outsiders to some extent... As for what it will be called after it is finalized, we can discuss it later."
But it is obvious that everyone's focus is not on the details such as the name.
You know, before, each unit basically planned and designed the performance plan according to the WS-10B.
And now...
Chang Haonan noticed that there was a commotion at the 601 Institute, and it seemed that a new plan was being changed on the spot.
The fourth-generation pre-research was originally quite imaginative, so it was impossible for each institute to have only one set of preparations.
Since the expected power level has changed drastically, the priority of the internal plans will naturally change.
He took a look at it from a narrow angle and found that the plan that appeared on the other party's computer screen was a plan that seemed to be somewhat similar to the F22, although the details were different.
However, while they were busy, the 611 Institute sitting next to them successfully seized the initiative.
"Comrades, let me start by throwing out some ideas."
The first person to speak was Yang Wei, who has now taken over the position of chief designer of the 611 Institute:
"The foundation of modern aviation stealth technology is still based on the stealth of aircraft shape. Whether it is radar-absorbing materials or plasma stealth technologies, it will be difficult to occupy a major position in the next 15-20 years. Therefore, the measures to achieve stealth are relatively unified. The difference mainly lies in what kind of aerodynamic design methods and wing surface composition the aircraft adopts under the stealth requirements."
The words he used were very modest, but judging from his momentum, he was directly aiming to set the tone for the meeting.
While saying this opening speech, the conference staff had already switched the projector line to the computer in front of Yang Wei:
"In this regard, our principle is not to be innovative, but also not to imitate blindly."
"Just now, Academician Chang gave us a target power of the fourth-generation fighter that is no less powerful than the F119PW100 engine, which provides a solid foundation for our aircraft design work... But even so, if we just follow the technical ideas of the F22, it is impossible to really get a product that exceeds its performance..."
Even Chang Haonan, who is not very clear about the inside story, can hear that this sentence is very targeted.
Sure enough, the busy 601 Institute suddenly stopped for a moment.
After all, everyone is a second-level unit under the same system.
They all know each other's details to some extent.
Yang Wei continued as if he hadn't seen anything:
"From the perspective of external experience, the United States had canard layout plans in the early stages of the ATF and JSF project selection process. Although they were later defeated by conventional layouts in the competition, it was more because the United States could not completely solve the interference of the front wing on the main wing while meeting the stealth requirements."
"But through the training of Project No. 10 and the flight data accumulated by nearly 100 J-10 aircraft at various stages, we have undoubtedly surpassed the United States in the performance characteristics and design methods of the canard-plus-delta-wing aerodynamic layout, which is enough to support the application of this design plan on the fourth-generation fighter..."
At this point, he pulled out a slightly rough schematic diagram on the PPT, but it can already see some of the characteristics of the J-20:
"The number of airfoils of the canard plan is the same as that of the conventional layout. As long as it is designed properly, it will not have a negative impact on the forward radar reflection area that aviation comrades are most concerned about. The inlet part can also use the DSI structure that we are familiar with to further improve Stealth capability, but compared to the J-10, the air inlet of the fourth-generation fighter needs to be optimized to the supersonic range. Fortunately, the target power performance is strong enough to support sufficient subsonic performance..."
"The air intakes on both sides of the fuselage facilitate the installation of a bomb bay of sufficient size in the middle of the air intake. Although it will increase the cross-sectional area of the middle fuselage by about one-third and the structural weight by about one-fifth, the air intakes The flow channel between the inlet and the engine fan is to avoid the bomb bay, which will naturally form an S-shaped inlet on the axis of the intake duct that is conducive to low RCS requirements and better balance the relationship between stealth and flight performance..."
"Of course, the canard layout will inevitably lead to an increase in the axial size of the aircraft. At the same time, in order to make up for the loss of stability compared to the conventional layout, it may be necessary to add additional directional stabilization surfaces. These will indeed increase the aircraft's lateral stealth capabilities. It will bring some adverse effects, but our future combat model is different from that of the US military, including Comrade Lu Guang’s speech just now, which also placed supersonic mobility in front of the lateral RCS..."
"..."
Regarding this plan of the 611 Institute, Chang Haonan, who has seen the J-20 with his own eyes, may be more familiar with it than Yang Wei himself today.
But after listening to the whole process, I still gained a lot of new gains.
Especially in terms of performance trade-offs, it has indeed reached a certain level of perfection.
In fact, Chang Haonan has no strong will to make changes in the route selection of the fourth-generation fighter jets, and is completely prepared to let nature take its course.
He believes that based on the current level of China Aviation Industry on this timeline, no matter which solution is chosen in the end, it will be able to come up with a product with performance no less than that of the F22.
However, Chang Haonan was still a little curious about how his opponent planned to counterattack.
He did know that in addition to the famous three-wing design, the 601 had a traditional layout plan similar to the later enlarged version of the J-35A.
Combined with what I just saw at a casual glance...
Maybe it's that one?
But if that's the case, it seems a bit too boring.
Besides, what Yang Wei just said is right.
Under the current technical conditions, the F22 has basically reached the peak of the fourth-generation fighter with conventional layout. If we blindly follow the development pace of American aviation technology, the result will only be further and further away.
For a time, almost all the attention in the venue was focused on the people in School 601 opposite.
And their response was quite rapid.
Soon, a new diagram appeared on the curtain at one end of the conference room.
It was the plan Chang Haonan had seen before.
At first glance, it does look like an F22 using a DSI air intake.
In other words, the F35 in a double-release layout.
But now taking a closer look, Chang Haonan immediately noticed a new detail——
This aircraft has neither canards nor a tail in the conventional sense!