No one knows how many phone calls Ding Gaoheng made that night and how many people he woke up from his sleep.

In short, in the afternoon of the next day, a newly delivered H-6 landed on the runway of Yanliang Airport, and was quickly towed into the assembly workshop to prepare for modification.

There is not much time left for them, but fortunately the aircraft itself already has a complete pipeline and control system, which can be improved slightly.

To Chang Haonan's surprise, a little later in the arrival of the bombing 6, another Boeing 737-300 slowly appeared in the sky.

Flew over from Shengjing.

Although at first glance it looks similar to the livery of most civil aircraft, the tail is painted with a parallelogram flag.

It is similar to the Challenger 601 business jet he flew in when he came to Hojing a few days ago.

The VIP plane of the 34th Air Division.

"Is there a leader coming?"

Chang Haonan, who had just completed the on-site inspection of the bombing 6 in the final assembly workshop, was a little stunned for a while.

The specifications of this negotiation are indeed very high, but even according to the principle of reciprocity, Huai Guomo's rank is definitely enough, and there is no need for a person with a higher status to show his face in person.

And the level of security around the airport is completely different from that at Beiling Airport.

As the Boeing 737 landed and began taxiing a few minutes later, his doubts were quickly answered.

What came out of the plane was a group of old acquaintances.

"Senior sister? Foresters? ”

Chang Haonan quickly recognized the two people who came out of the cabin first.

One is naturally Yao Mengna, who has not been seen for more than a month.

The other is the leader of the digital design team who was taken by Chang Haonan and his wife for a few months in the 601 Institute, and now he can barely take charge of himself, Lin Xikuan.

"Dr. Chang!"

After seeing Chang Haonan, who was wearing an aviation industry overalls and standing not far from the parking stand, Yao Mengna involuntarily pulled a smile at the corner of her mouth, but she still maintained a little reserve, only slightly speeding up her pace.

But Lin Shikuan didn't pay attention to it so much, and walked down the gangway quickly, stretched out his hands and shook hands with Chang Haonan:

"Happy New Year, Dr. Chang, I'm so happy to be working with you again."

Among the employees of the aviation industry who have cooperated with Chang Haonan, only Lin Shikuan has always called him Dr. Chang because of his habit at the beginning, and he obviously respects him more.

On the one hand, the two have worked together for a significantly longer time, and on the other hand, Lin Shikuan and his entire digital design team have also gone from Chang Haonan and Yao Mengna to a rising star in the entire research institute since Chang Haonan and Yao Mengna arrived at the 601 Institute.

It can be said that Lin Shikuan's entire life has changed because of Chang Haonan.

"Senior brother, long time no see, Happy New Year."

Yao Mengna also walked down later, but almost subconsciously stood opposite Lin Shikuan, side by side with Chang Haonan.

"Happy New Year, Senior Sister."

Behind the two of them are more than 20 engineers from the 601 Institute who have participated in the improvement and design of the J-8C.

Now Chang Haonan finally figured it out.

It should be that the Commission of Science and Technology has played a role, and it is worried that the strength of the 603 Institute alone will not be enough to complete the research and development of the H-6AIT aircraft and the improvement of the anti-icing system of the MA60 in such a short period of time.

As for this Boeing 737 plane......

If it is combined with the Challenger 601 that I sent over, it does have some deep meaning-

When Chang Haonan came over by himself before, he didn't know exactly what he was going to do, and he was arranged to take off from the military part of the Shuangta Airport, and he took a specially sent business jet, but he felt a little flattered.

But on both occasions for the transport of personnel, neither aircraft of the civil aviation system were chartered.

Obviously, there are confidentiality concerns.

Although Chang Haonan has always been far away from the rivers and lakes, he knows very well that the development of the aviation industry is not only a technical problem, but also a route problem.

Judging from the current situation, Ding Gaoheng and the system of the Science and Technology Commission are obviously superior.

For him, this result is obviously a reassuring pill.

At this time, Yi Yuanhe also stepped forward and thanked the brother units for their support on behalf of the entire Hojing factory.

"Mr. Yi is polite, why don't you feel grateful, isn't our Huaxia Aviation Industry a family......

Lin Shikuan said and walked behind Chang Haonan and Yi Yuanhe to the office building of Factory 172.

His words are not entirely polite, at least Chang Haonan had seen many bigwigs from 603 and 611 when he was celebrating in his previous life.

In the 90s, the first people involved in the aviation system were not all retired, and they were actually more closely related to each other.

Besides, the Commission of Science and Technology has come forward to coordinate, can you still not give face?

That's the benefit of being in one place.

After the greetings, the group also arrived at the office space prepared for them.

Lin Shikuan turned to Chang Haonan again:

"Changgong, you will assign the work to all of us next."

"What ...... this?"

Chang Haonan briefly analyzed the current situation:

For him, it is not difficult to design the plane nozzle array, and with the assistance of the designers of the 603 Institute, as long as some key parts are sorted out, the rest of the numerical simulation part only needs to let the computer run on its own.

On the contrary, the analysis of the icing situation of the wing under SLD conditions and the aerodynamic effects need more manpower to complete.

"Let's go, let's go to the design room first, and I'll briefly explain the current situation to you......"

Subsequently, Chang Haonan spent about 10 minutes introducing the two tasks in front of him.

Of course, it was only about the need to design a new icing jet and retrofit the MA60 to adapt to even harsher climatic conditions, which had to be completed within a week, and omitted all the parts related to the EU-China negotiations.

It's not that they don't trust Lin Shikuan, Yao Mengna and others.

It's just not necessary.

Until the dust settles on the negotiations, the fewer people who know about it, the better.

"So my arrangement is to leave three to four people to assist in the design of the plane nozzle array and to change the original refueling control system to a water spray control system, Lin Gong, Senior Sister Yao, the two of you and the rest of the comrades, need to help improve the work of the Xinzhou 60."

After Lin Xikuan listened to the work arrangement, he reached out and pushed his glasses, and asked with some hesitation:

"It's okay to improve the design, but ...... After the design is completed, it will have to be manufactured, is a week really enough? ”

"Of course, it's not enough to make new ones."

Chang Haonan replied crisply:

"But I have already done some small calculations last night, and I found that the lift coefficient of the increase and drag reduction airfoil is more obvious when it encounters large particles of cold water droplets."

"Because of the limited time, I only tested it once at 100 microns and 500 microns, and the results were fine at 100 microns, but under the condition of 500 microns, the icing on the leading edge slat thickened the flow boundary layer on the upper surface and the scale of the standing vortex behind the slat became larger, and the lift coefficient was reduced by 54.6% within 180 seconds of icing, while the icing on the winglets led to a change in the flutter characteristics, and the effect of the previously designed active flutter system was weakened, and the flutter velocity was directly reduced by 15%."

"This situation cannot be saved even if there is a good de-icing system, so if you want the aircraft to fly normally in extremely harsh working conditions, you have to use back the more conservative wing before, and you just need to let Factory 172 modify it."

It's the same SLD, and it's also different.

Droplets with a diameter of 100 microns and 1000 microns are both called SLDs, but the effects on the aircraft are obviously completely different.

The reason why Chang Haonan wants to simulate a situation of 500 microns or even worse is to show off his skills on the face of Europeans, so he did not hesitate to modify the aircraft for this purpose.

As for the model that is really market-oriented, it is natural that the new wing will also be used.

Unless there is a clear request from the customer to fly in extremely bad weather.

That's the scope of the special aircraft business, and this kind of user can naturally accept the corresponding performance loss.

In fact, in the previous life, even until Chang Haonan's rebirth, there was no aircraft in the world that could verify the compliance of supercooled large droplets, mixed phases and ice crystal freezing conditions through the method of the whole aircraft icing test.

Therefore, the normal configuration with the 4 types of anti-icing capabilities in the Huaxia standard is absolutely enough to cope with normal flight conditions.

The Americans are just making cards out of nowhere.

Improving the accuracy of weather forecasts is the way to go.

You have to take off in a snowstorm with high humidity, and the gods can't save them when they come.

After explaining, Chang Haonan put down the chalk and looked back at everyone:

"Do you understand?"

Looking at the key data of Chang Haonan and the mathematical model written down on the blackboard, the members of the 603 Institute who participated in the meeting below collectively performed a dumbfounded-

Didn't we just get the assignment yesterday?

It's only been one night, huh?

I thought it was just the beginning?

Why did you even get the results of the phased research out?

Be a person!

After a long while, one of the engineers raised his hand weakly:

"Permanent Worker...... By that means, you already have an idea? ”

Chang Haonan smiled and nodded:

"Of course, we'll go to the computer room for a detailed chat later."

And Lin Xikuan, who had already been surprised by this, immediately pouted, and said in his heart, You little comrades of the 603 Institute still don't see much, and Chang Gong has not shown the most inhuman side before he is shocked like this......

Too young!

(End of chapter)