After the seminar, Chang Haonan was unsurprisingly surrounded by a group of people again.

In addition to the people who approached him to discuss the aspects of fluid dynamics simulation, there were also people who were interested in the situation of the MA60.

Even Yao Mengna and Lin Shikuan, who were with him, were asked a lot of questions.

Therefore, it was not until more than one o'clock in the morning that Chang Haonan and the three finally "escaped" from the conference room.

"Whew-"

Lin Shikuan, who had not encountered this kind of battle for a long time, moved his somewhat stiff body and exhaled deeply in a happy mood.

Although it was with Chang Haonan, the feeling of being surrounded and asking questions.

Refreshing!

But in the blink of an eye, he felt a little worried.

"Dr. Chang, the flow field simulation analysis you just mentioned at the meeting can really be completely consistent with the test flight results?"

In the past year or so, Lin Shikuan and his engineers have actually been working hard to learn from the advanced experience of foreign counterparts, and have read a lot of literature and technical manuals when the information is not developed and there are technical barriers in the field of engineering simulation.

They can't be blamed for not making any outstanding achievements, after all, Huaxia has no foundation at all in this regard.

Therefore, Lin Shikuan knows very well that even the Americans, who are at the forefront of the world in aerodynamic simulation, cannot guarantee the accuracy of the numerical calculation results, and can only say that there are no problems in terms of laws.

However, Chang Haonan is ready to directly challenge the comparison of numerical calculation results with test flight data!

"Exactly the same, of course I don't dare to say, that's why we need to test fly." Chang Haonan shook his head: "But if you can choose the right simulation method, it is not difficult to control the average difference at a level of about 5%. ”

This data shocked Lin Shikuan so much that he even forgot to continue to take a step, and directly fixed himself in place.

In engineering, a 5% error is already an accuracy that you can't even dream of.

You can't find two identical leaves on a tree, and you can't find two identical air currents on a single earth.

Even if two test flights are carried out on the same aircraft in a row, there may be a difference of a few percent between the data obtained.

"Yes...... But...... How is this done? Lin Shikuan asked in an unbelievable tone:

"We've talked to the French and the Americans, and even they can't do that."

"Could it be that they are hiding their secrets?"

"It's not a technical detail, there's no need to hide it." Chang Haonan waved his hand:

"Besides, if you look at their aircraft design cycle, you can roughly estimate that they really can't do this kind of accuracy."

"But, have you ever thought about ......"

Speaking of this, Chang Haonan suddenly stopped, turned around and faced Lin Shikuan behind him:

"Just because they can't do it doesn't mean we can't do it? Or are we inherently stronger than them? ”

"This ......"

Lin Shikuan looked blankly at Chang Haonan with his hands in his pockets.

He could feel that under the other party's breezy appearance, there was a kind of self-confidence hidden!

We are already stronger than them!

How many people could say this from the bottom of their hearts in the 90s?

However, Chang Haonan didn't just say it.

The tone and expression on his face when he said this sentence seemed to have a kind of magic that made others believe that he could really do it.

Yao Mengna, who had been walking in front alone, also subconsciously looked back because of this sentence.

The image of the other party seemed to grow taller at this moment.

Of course, what neither of them knew was that for Chang Haonan, who came back from 2023, it was really normal to have this kind of thought.

Looking at the stunned Lin Shikuan, Chang Haonan smiled, turned around and continued to walk in the direction of the dormitory.

The former finally reacted at this time, and quickly chased after Chang Haonan:

"You're right, we can be better than them, just in terms of aerodynamic simulation...... Among other things, the software we use is written by both French and Americans. ”

In fact, it is very normal for people living in this era to have this kind of thought.

Whether it is Yao Mengna or Lin Xikuan, their patriotic feelings may not be worse than Chang Haonan.

But feelings are one thing, reality is another.

In the face of huge disparities, it is easy to lose hope with one blow after another.

And Chang Haonan can just be that hope.

"Software, after all, is just a tool." He shrugged and replied, "Tool builders aren't necessarily the best at using tools, just as those of us who build airplanes don't necessarily fly airplanes." ”

After a pause of a few seconds, he continued:

"But what you said is also reasonable, other people's tools are not the most handy after all, sooner or later, we can also use our own tools."

Justified.

After hearing this, Lin Shikuan nodded:

"Well, I hope you're right, if you need help with anything during this time, just say it, and our entire digital design team will listen to you."

Of course, Chang Haonan was not ready to be polite to the other party, after all, he was still counting on more management experience through these people.

"The flow field simulation itself can be done by the two of us, and your task is to follow the idea that Yao Bo said the day before yesterday to get out the digital structure diagram of the entire aircraft as quickly as possible, so that the efficiency can be greatly improved when the wing is improved later."

In the original timeline, J-8F in order to straighten out the flow field disorder problem on the wing surface after the bomb, an additional pair of wing knives was added, from an engineering point of view, this is of course the least impact on the overall design, and later the Americans encountered the same problem when developing EA18G, and the solution was to directly add a pair of wing knives.

But that doesn't mean there aren't better options.

A better solution means more changes, and without a digital design approach, the project schedule will be very delayed.

"We'll do it as soon as possible."

When Lin Shikuan said this, he hesitated.

After a few seconds, he turned around and walked back in the opposite direction.

"Huh? Why are you going? ”

Yao Mengna, who was walking together, didn't react for a while.

"Go overtime."

"This ......"

Yao Mengna looked at Lin Shikuan, who was gradually moving away, and then looked at Chang Haonan next to him.

"Aren't we going along?"

The latter simply shook his head:

"I know what I'm going to do, and it's a thing that I need to rest."

……

Three days later, when a Jianjiao-7 plane borrowed by Yang Fengfa landed on the runway of Beiling Airport, Chang Haonan also handed over the calculation results of the wing flow field to the former.

This speed almost caught the team in charge of the project by surprise – no one expected the simulation results to be available in three days.

In fact, this is because it took two people a day to convert the numerical results output by the computer into a more intuitive flow field distribution map, otherwise two days would be enough.

Yang Fenghata looked at the simulation results in front of him and took a deep breath:

"Change the schedule and test fly early!"