After no power concerns, when I look at the schematic diagram of the plane on the PPT, the feeling is completely different.

There are no disadvantages, all advantages.

If anything, it is because the flexibility or agility of the aircraft will inevitably decline because it becomes larger and heavier, and the maximum speed on paper may decrease slightly after losing the area ratio design, which used to be almost the theoretical optimal solution.

But because of the larger thrust engines, there will certainly not be a major regression in terms of overall maneuverability.

Times have changed, my lord.

These are no longer the days of cannon combat, and the loss of agility doesn't matter at all.

"So, let's move on to the improvements to this Class II prototype."

"First of all, the most obvious part of the improvement is naturally the air intake, about the overall design idea of this part, I have discussed with Mr. Song and Mr. Yang before, and, since last year, with the assistance of brother units, the layout of related fields of research."

"This time, we also invited Chief Engineer Sun Huizhong from Guihang Industry, who will be a member of the No. 10 engineering design team in the subsequent design process......

Hearing that his name was suddenly mentioned, Sun Huizhong's face showed a look of shock and surprise, and he quickly stood up, turned around and greeted the venue behind him.

Originally, Chang Haonan actually wanted Song Wencong to talk about it, but the latter said that it was Chang Haonan's intention to hand over this part of the work to Guihang to complete, and it was not good to be greedy.

That's what seems to be a random sentence just now.

For a project like Project 10, which involves many systems and departments, many people are not familiar with each other at all, except for the core leadership members.

This is especially true for someone like Sun Huizhong who joined halfway.

If you don't integrate smoothly into the team, it's easy to look like an outsider who has come to pick peaches.

For example, when the production of Jianjiao-7 was handed over to Guihang, it was not without objections.

After all, Rong Fei at that time was also poor and was about to use pants.

It's much better now to be casually mentioned in the middle of a technical seminar like this.

After all, if you hold a special meeting for this matter, which is not nutritious, it will become a burden for everyone.

After introducing Sun Huizhong's situation to everyone, Chang Haonan quickly retracted the conversation to the point:

"The results of the actual installation test of the DSI air inlet are finally reflected in the Jianjiao 9 advanced training aircraft that has been designed and finalized and almost simultaneously achieved domestic and export sales, and the data collected during the test flight of this model will be used in the follow-up research and development of the No. 10 project."

"According to the current test flight and the extended data calculation results, the DSI inlet is 1.2 and below the incoming Mach number, and the pressure coefficient of the surface of the lip bulge is symmetrically distributed along the center line of the bulge, the pressure gradient is obvious, and it has the characteristics of increasing along the main stream direction in different sections, and the sweeping effect of the bulge configuration on the attached surface layer is significantly stronger than that of the current binary adjustable air intake."

"After exceeding the Mach number of 1.4, the sweeping ability of the surface layer of the bulge surface will be sharply reduced, and the separation of the surface layer will be strengthened, which will cause a large intake pressure loss and distortion, and it is expected that after the use of the vortex generator, this obvious inflection point can be extended to the Mach number of 1.8."

"Of course, the specific design details still need to be determined by the comrades in charge of the inlet design according to the actual situation, but I already have a relatively mature design method here, so I don't have to explore it from scratch."

As soon as this sentence fell, there were several faint exclamations with a little joy below.

Obviously, the intensity and difficulty of this work was much lower than they had previously expected.

"However, considering that there are already heavy aircraft and special interceptors in the future Air Force equipment sequence, there is no need for the J-10 to undertake high-speed interception tasks, and it is difficult for the aircraft to reach a speed of more than Mach 1.8 under the commonly used combat load, so such a performance calibration is not a problem for a single-engine medium aircraft."

Speaking of this, Chang Haonan also paused slightly.

On the one hand, it is to let the people below absorb the content, and on the other hand, it is also to take the opportunity to drink saliva and turn the PPT to the next page at the same time.

It's still the same plane, but the view has been switched to the belly part.

"It can be seen from the first size diagram that the three-dimensional dimensions of the new design have basically remained the same, but the cross-sectional shape of the aircraft has changed significantly, which increases a certain resistance, but also improves the area of the belly part and the internal volume of the fuselage."

"In the original design, the aircraft had a total of only seven main hardpoints, of which only four could carry weapons and ammunition, and although the payload capacity could be increased with composite pylons in operation, it would still limit the multi-purpose performance of the aircraft."

"After the modification, the original belly center line pylons can be split in two, the fuel supply system here can be eliminated, replaced with electrical wiring, and if necessary, even two more light-load pylons can be added on the side edge of the air intake between the main and auxiliary landing gear."

PPT is indeed a good thing, so that Chang Haonan, who is not good at painting, no longer needs to pollute his own and other people's eyes with chalk and blackboards.

With just a few clicks, the new pylon arrangement is displayed in the upward view of the aircraft.

"Mr. Chang."

Taking advantage of this opportunity, an engineer sitting in the first row below raised his hand and asked:

"Two medium-range air-to-air bombs, plus the corresponding pylons, are about 400-450kg, will adding such a part of the weight to the side edge of the first half of the air intake channel affect the strength of the lip part?"

His concerns were clearly justified.

After all, in the existing design, the main role of the six sticks in the connecting part of the air intake and the body is really to strengthen the structure......

"This problem was considered at the beginning of the program, and at first it was intended to be reinforced at the joint, but later it was found that the DSI inlet itself can reduce the mass of nearly 300kg compared to the binary adjustable air intake, so there will not be such a big difference."

"The part that really needs to be properly handled by the comrades involved in the structural design is how to arrange the electrical wiring required by the two pylons in the outer wall of the air intake......"

That is to say...... The belly part is not ready to be used to arrange the auxiliary fuel tank? ”

"That's right."

Chang Haonan nodded directly:

"In the belly of the machine, the original plan to arrange the auxiliary fuel tank is only 900 liters, after the modification of the body, the fuel volume in the aircraft is expected to increase by about 1100L, which can completely cover the 900L fuel of the belly auxiliary fuel tank."

"In this way, the prime space between the two landing gears is left, and it is completely possible to mount two air-to-face weapons that are relatively large in size and weight."

"Placing the large loads closest to the centerline of the aircraft allows for higher maneuverability, although the total weight does not change compared to the conventional arrangement under the wings, but the moment of inertia of the aircraft is smaller."

Speaking of this, people who react faster have basically understood what Chang Haonan meant.

"Comrade Haonan means to transform our No. 10 project into a multi-role fighter that can be compatible with various types of missions......"

Yang Wei looked at the design plan projected on the curtain and pointed out the key to it.

It's not just the application of a certain technology.

It's a shift in thinking.

"Yes, a real multi-role fighter."

Chang Haonan immediately expressed his affirmation, and then began to talk about his overall thoughts:

"Although technically speaking, the current J-10 also has the ability to do so, but in terms of overall layout, it is not suitable for tasks such as battlefield jamming or air raids outside the defense area."

"Of course, as far as the current situation of struggle is concerned, a medium-sized aircraft that favors pure air superiority and focuses on agility does meet the needs of the air force."

"However, with the continuous development and progress of our people's air force, the transformation from a simple territorial defense force to an offensive and defensive air force, and even an offensive air force, is actually just around the corner."

"An aircraft with limited range and payload capacity must be difficult to adapt to the increasingly complex operational scenarios of the People's Air Force in the future, and the vitality of a model of aircraft depends to a large extent on the extent to which its basic design can meet the needs of users."

"That's why I came up with such a preliminary plan, hoping that Project 10 can truly become an all-round model with no obvious shortcomings with the size of a medium-sized machine!"

In fact, from the very beginning of his involvement in Project Ten, his goal was to make the aircraft surpass the F16 in all aspects, not just air combat performance.

It's just that before the performance of the turbofan 10 is really determined, this matter is indeed difficult

So he never said this goal.

The J-10 of the previous generation chose a single-function technical route with air superiority because of the limitations of technology (the self-weight was originally too large, and the engine thrust was not enough) and vision (no one could have imagined that the Air Force would have thousands of third/fourth-generation aircraft in more than ten years).

But the problem is that excluding the special scenario of carrier-based aircraft, medium aircraft cannot roll up to heavy aircraft of the same technical level in any way in addition to cost.

Therefore, whether it is F16 or J-10, the "light" part of the light and heavy combination must be biased towards doing dirty work (licking the ground) in the end.

However, when the Air Force really took the original J-10 to do chores, it found that it seemed to be unsuitable for dirty work......

There have even been famous scenes of using asymmetrical mounts, with air-facing weapons on one side and air-to-air ammunition on the other.

It's not that it can't be used, but it's awkward to use.

And now that the more powerful turbofan 10B has been born, it is natural to solve this problem without any worries, so as to create a real hexagonal warrior!

(End of chapter)