Although what Liang Shaoxiu said was not wrong, this plot unfolding was something Chang Haonan never expected.

It seems that under the word of mouth of insiders in the aviation industry, the speed and scope of his fame spread are somewhat beyond imagination.

This is also a good thing, the higher his reputation, the easier it will be to achieve the goals set at the beginning of his rebirth.

Moreover, as a normal person, after hearing others make such an evaluation of himself, Chang Haonan's mood naturally improved a lot.

As for Wang Xiaomo's question......

For him, it's not even a problem.

After all, the Air Police 200 in the previous life was designed on the basis of the Y-8 three-class platform.

Now, after a round of additional improvements, the Y-8F-400 is far superior to the former in all aspects of performance, especially in safety and low-speed maneuverability, and is naturally more suitable as a special aircraft platform including early warning aircraft.

Of course, if the plan designed by Chang Haonan on Ding Gaoheng's side can be completed normally, then after entering the new century, Huaxia should be able to complete the design improvement and localization of the Tu-204/214 passenger aircraft, and at that time, there will be no need for the veteran Yun 8 to continue to take the lead.

So in the end, there shouldn't be as many models that use the three types of platforms as in previous lives.

But these are all later words, and at present, we can only consider making a dojo in the snail shell of Yun 8.

From an afterthought's point of view, the design of the Air Police 200 is not perfect, and there are still many things that can be improved.

And this just leaves room for Chang Haonan, who is not satisfied with simply copying the design scheme of his previous life.

The only thing he needs to determine is what level of radar technology in Huaxia is at the moment.

The development speed of the electronics industry is already fast, and the fact that the 14th Electric Branch in 2002 could create an early warning radar does not mean that the 14th Electric Science and Technology Institute in 1997 will also be able to.

Therefore, after a short period of hesitation, Chang Haonan still did not take care of everything, and chose a relatively cautious way to deal with it:

"Although I am grateful to Liang Gong and Academician Wang for your trust in me, I definitely need some more detailed information to make a judgment on this kind of thing."

"After all, the core of the early warning aircraft is still to engage in radar, and the Yun-8 platform does have a lot of potential for modification from the perspective of structure and aerodynamics, but whether it can be done depends on whether the electric technology group can come up with a compact enough radar."

At this point, he paused and added an example:

"For example, a disc-shaped radome with a diameter of more than ten meters like the ring project you just said will definitely not be able to be installed on the Yun 8, it is too big."

Although he did not directly obtain any guarantees, Wang Xiaomo still sensed a very positive meaning from Chang Haonan's tone and attitude.

It shows that the feasibility of changing the AWACS aircraft is actually very high in the mind of the latter.

It's just that out of the instinctive rigor of the engineering staff, no direct conclusions are given.

This made Chang Haonan's evaluation in Wang Xiaomo's heart increase a lot-

After all, he is an academician of the Electric Technology Group, and he has not intuitively felt the ability of the other party like Du Yishan and others.

Although he has Liang Shaoxiu's endorsement, after meeting him today, the youth of the person in front of him still makes the old academician muttered a little in his heart.

Engineering and theoretical research are not the same, on the one hand, you need experience, and on the other hand, you need to be cool-headed.

Both of these tend to grow over time.

Somewhat like doctors and teachers, an overly youthful image always makes people feel unreliable at first.

And now, Chang Haonan has at least proved that he has no shortcomings in the latter item.

That's how trust is built step by step.

"That's what I think about the design of the radar antenna."

Wang Xiaomo took out a few pieces of paper from the briefcase he was carrying, obviously prepared:

"With our current level of technology, in order to ensure that the radar has a detection range of about 300 kilometers for a target of 5 square meters in the RCS position, about 2,000 T/R components are needed, uh...... Xiaochang: You should know what a T/R component is, right? ”

Seeing Chang Haonan nodding, he continued to speak:

"Combined with the packaging process, if you want to arrange these 2,000 T/R components on one side of the array, then the size must be 8.5*0.6m, in this way, as you just said, the structure of the disc radome and the three-sided array will definitely not work."

Speaking of which, Wang Xiaomo flipped over the content of calculating the antenna size on the first page, revealing the overall scheme concept on the second page.

Unexpectedly, it was Chang Haonan's familiar appearance.

But he still had to pretend to be slightly surprised:

"Balance beam antennas?"

"Yes, in fact, the first flight of the Swedes the year before last, the Saab 340 early warning aircraft has used such a structure, although there are 60 ° blind spots in front of the aircraft and directly behind the aircraft, but the antenna can be installed vertically on the aircraft, and the weight of the entire antenna structure can also be pressed to less than 1 ton, which should be more convenient for your aircraft design department."

"If it's an 8-and-a-half-meter antenna, it should be acceptable."

Chang Haonan saw that the heat was almost there, so he was ready to reveal the more perfect plan:

"But I have a slightly different idea."

Sure enough, Wang Xiaomo showed an expression of interest:

"Tell me about it."

"Actually, I also paid attention to the situation of the Saab 340 at that time, so I did some calculations in my spare time."

Chang Haonan picked up a pen from the side, and at the same time, Guo Lin also took the opportunity to put a piece of paper in front of him.

Hand the paper .jpg to the big guy

The so-called attention to Saab 340AEW naturally does not exist, this model first flew in 1994, at that time Chang Haonan has not been reborn, just a sophomore who works hard but has average talent.

It's just that this kind of thing is obviously what he says.

"First of all, even in terms of balance beam design, Saab's proposal was terrible, and they chose a radar bay bracket that had the most adverse impact on the aircraft."

As he spoke, Chang Haonan waved his pen and drew several different radar installation methods on the paper.

"The A scheme chosen by the Saab 340AEW has a positive derivative of the heading stability of the bracket, which plays an unstable role, while this is not the case with the other three schemes."

"But the point I want to say is not this, but this kind of balance beam antenna, no matter how it is designed, it cannot avoid the bracket causing side washing at the vertical tail, interfering with the direction of the vertical tail flow, and at the same time, the blocking effect of the bracket reduces the flow velocity on the vertical tail, it can be said that the damage to the stability of the course is even greater than the radar antenna itself."

"Is that so?"

For non-aviation majors, this conclusion may sound counter-intuitive at first glance, but the question of aerodynamics is just that, and some small and inconspicuous places are at stake.

"That's right."

Chang Haonan nodded, and the action of outlining the lines on his hand was also fast:

"In order to make up for this loss of stability, not only do you need to design two large pelvic fins at the tail, but also consider increasing the vertical tail part, if it is a large aircraft like Il-76, it is just that, but the maximum take-off weight of the Y-8 is only 60 tons, and the impact on the structure after modification is great, and the fuselage needs to be further adjusted, which is too much work."

"So let's not let go of our thinking, simply don't want this obstructive bracket, connect the radar array directly with the fuselage, and let the antenna itself as a support structure, so that the impact on the stability of the course and the resistance brought by it will be smaller, and a larger array area can be obtained, in addition, a similar 'hat' structure can be added to the top of the side-view antenna, and the antenna arrays in the front and rear directions of both sides can be installed, although the performance is certainly not comparable with the side, but at least it can be regarded as achieving 360° full coverage."

"Although there will still be some effects, it can be offset by the addition of two pelvic fins, and there is almost no need to make major changes to the overall structure of the aircraft."

Painting is also a matter of practice, because he often has to present his plans in a similar way during this time, so what he paints now is at least less abstract.

At least Wang Xiaomo can see it at a glance.

In fact, the plan that Chang Haonan came up with is basically the "wedge tail" antenna of the American E737 early warning aircraft in the previous life, which can be regarded as a comprehensive upgrade of the traditional balance beam scheme.

The only disadvantage is that the wedge-tail structure has a much larger dead weight than the balance beam, so it cannot be mounted on a platform that is too small.

However, the only advantage of the Y-8 as a special aircraft platform is that the load is large enough.

The Boeing 737 has a load of 16 tons, and the Y-8 can carry 20 tons.

More than a few hundred kilograms is not a problem at all.

In short, if the Air Police 200 can use this design in advance, it can definitely bring a huge performance improvement.

Good news for pilots as well.

You know, AWACS is generally not easy to fly.

(End of chapter)