The military-industrial scientific research system of the academic master.

Just when Russia was re-planning the flight show for the next day, Chang Haonan no longer had the energy to continue paying attention to the Xiangzhou Air Show.

No one expected that Chang Haonan's next work place would be neither the Shengjing 601 Institute, which still needed to finish the August 611rd Project, nor the Chengcheng 602 Institute, which had already extended an olive branch to him and was just waiting for project review and approval. So, let alone Bingcheng No. who only chatted with him at the end of the dinner.

It was the Nanzheng 182 Factory that had not even appeared at the air show.

After the dinner on the first day of the air show, Chang Haonan, who was already lying on the bed and about to fall asleep, was suddenly awakened by the rapid ringing of the doorbell.

The visitor is a local staff member from Xiangzhou, who should be the organizer of the air show.

After confirming the identity of the person outside the door, Chang Haonan sleepily opened the door a crack.

He was a little angry when he was woken up.

"anything?"

As a result, the other party's words made him sleepless:

"Comrade Chang Haonan, there is a call from Nanzheng, saying that there is urgent matter for you."

"Did Nan Zheng call?"

Chang Haonan was stunned for a moment.

He didn't remember having any interactions with him.

"Should I go down and answer the phone?"

The person outside the door shook his head:

"No, this call is confidential, it's an internal call, so you'd better change your clothes, we're going to the Xiangzhou Municipal Party Committee's Confidentiality Office."

"Okay, just wait for me."

……

Nearly an hour later, Chang Haonan, who was pulled out of bed, finally rushed to the confidentiality office and contacted Du Yishan on the other end of the phone.

"Xiao Chang, the Science and Technology Commission has issued an urgent task. I need you to go with me to the Nanzheng 182 Factory."

"Factory 182...is Shaanxi Fei?"

When Chang Hao originally started working, Factory 182, like Factory 172, had become the aircraft manufacturer corresponding to the 606. Its presence in the field of aircraft design was quite weak, so it took him about a second to realize that it was the other party. Where are you talking about.

"Yes, Shaanfei." Du Yishan on the other side of the phone said in a serious tone:

"Just this evening, a special model Y-8 aircraft that had just been modified suddenly lost its pitch balance when it was preparing to land after a test flight. Although it did not cause a first-class accident due to the low altitude and the timely response of the crew, the aircraft was still affected. "Severe damage was caused, and it is initially suspected that the aircraft suffered icing on the wings."

"The technical capabilities of Factory 182 are relatively limited, so we have applied for foreign aid. We need to help find out the specific causes of the accident and improve the aircraft."

"Before tomorrow morning, there will be a Boeing 737 landing at Xiangzhou Airport. You can take that plane to Nanzheng. We will talk about the rest after we arrive."

Hearing this, Chang Haonan also felt a chill in his heart.

Yun-8's wing was icy.

In the original timeline, this was a long-standing problem that had plagued the Chinese Air Force for nearly 40 years, and it resulted in extremely heavy losses.

For example, on June 2006, 6, an Air Police 3 early warning aircraft crashed while performing a mission. All 200 people on board, including the crew, died. 40 of them were senior engineers who were testing radar and electronic equipment. For my country's aviation industry, Developments in electronics have dealt a heavy blow.

He even knew some of the victims.

According to the investigation, although the cause of the accident also included non-technical factors such as overloading of the aircraft (a lot of additional test equipment was installed), the main reason was the instability of the pitch axis caused by ice on the wings.

Obviously, the problems encountered by Nanzheng this time should be similar.

"Okay teacher, I understand."

"See you tomorrow."

After hanging up the phone, Chang Haonan was in a daze.

He didn't know whether the accident in 1996 existed in his previous life. After all, it was just a second-class accident with no casualties, and it might not be reported and publicized.

But this is undoubtedly a chance for redemption——

包括6·3空难在内，运8仅在21世纪的头20年中，就至少因为相同或相似的原因坠毁了4-5架之多。

Even if Chang Haonan has changed many things after his rebirth, at least in the next ten years or so, the People's Air Force will not be able to completely eliminate this model.

It will also be almost the only medium-sized special aircraft platform available in the aviation industry before the Tu-204/214 realizes localization.

Therefore, if the problem of Y-8 wing icing can be completely solved now, a lot of unnecessary losses can be avoided.

Those outstanding pilots and engineers can continue to shine in their positions...

That night, Chang Haonan couldn't sleep.

After getting on the Boeing 737, he finally rested for a while on the plane.

Until I was woken up by the wheel touching the ground and the subsequent sound of brakes.

After the plane stopped, Chang Haonan strode out of the cabin.

The cold wind in early November blew on him, making him shiver involuntarily, and he suddenly woke up at the same time.

"teacher."

Du Yishan has been waiting beside the gangway for some time.

After walking closer, Chang Haonan noticed that his eyes were bloodshot. He probably didn't sleep all night last night.

"Come with me, let's go see the plane first."

The teacher and student got into a jeep next to them, one on the left and the other on the right.

"After I called you yesterday, I led the comrades from Factory 182 to conduct an all-night data analysis, and we have basically clarified the cause of the accident."

As a veteran figure in the aviation system, although Du Yishan is old, he still has strong abilities in these areas that require experience:

“Due to initial design issues, the Y-8 only used engine hot air for heating on the leading edges of the inlets, wing leading edges and engine guide blades, while only the tail leading edges, propellers and hub fairings were heated. Electric heating device.”

"When the aircraft was approaching landing, the environmental conditions were an atmospheric temperature of 2°C, a humidity of 71%, and a temperature dew point difference of 4°C. It happened to be in the most icing conditions. The horizontal tail of the aircraft quickly formed ice, but due to the operation 8 There is no convenient way to observe the condition of the tail, so when the pilot realizes that the horizontal tail condition is not right, it is too late to turn on the electric heating and de-icing device."

"According to our calculations and analysis, the supply of hot air to the engine is sufficient, so there will be basically no icing on the main wing and engine inlet. However, the problem of icing on the tail wing is more complicated, and the Y-8 modification progress is very fast. It is very urgent that you use simulation methods to improve efficiency and try to reduce the number of aircraft for flight testing."

Just as Du Yishan was introducing the situation to Chang Haonan, the jeep had already arrived in front of a large parking shed.

There was a strange-looking airplane parked inside, or rather lying on its side.

Although the appearance is indeed that of the Yun-8 at first glance, the navigator cabin in the original nose part has been replaced by a bloated "big nose".

This is a Y-8J maritime surveillance aircraft.

In other words, it is planned to be transformed into a platform for transporting 8J warning aircraft!