Just when the Russian side replanned the next day's air show project, Chang Haonan no longer had the energy to continue to pay attention to the things at the Xiangzhou Air Show.

Everyone didn't expect that Chang Haonan's next place of work was neither Shengjing 601 Institute, which still needed to carry out the finishing work of the 83 Project, nor Rongcheng 611 Institute, which had already thrown an olive branch to him and was just waiting for the project review and approval, not to mention the Bingcheng 602 Institute that chatted with him at the end of the dinner.

Rather, it was the Nanzheng 182 plant, which did not even show up at the air show.

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

The person who came was a local staff member in Xiangzhou, who should be the organizer of the air show.

After confirming the identity of the person outside the door, Chang Haonan opened the door with sleepy eyes.

He was somewhat angry when he was woken up.

"What's the matter?"

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

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

"Nan Zheng called?"

Chang Haonan was stunned for a moment.

He didn't remember any crossovers he had with there.

"Am I going down to answer the phone?"

The man outside the door shook his head:

"No, this phone is secret, it's an internal phone, so you'd better change your clothes, we have to go to the Xiangzhou Municipal Party Committee Confidentiality Office."

"Okay, you wait for me."

……

Nearly an hour later, Chang Haonan, who was dragged out of the bed, finally rushed to the confidentiality office and got in touch with Du Yishan on the other end of the phone.

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

"Factory 182...... Is it Shaanxi Fei? ”

At the time when Chang Hao originally joined the work, Factory 182 had become the aircraft factory corresponding to 606, just like Factory 172, and its presence in the field of aircraft design was quite weak, so it took him about a second to realize what the other party was talking about.

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

"Just this evening, a special type of Y-8 aircraft that has just completed the modification suddenly lost its pitch balance in the process of preparing to land at the end of the test flight, although because of the very low altitude and the crew responded in time did not cause a first-class accident, but the plane was still seriously damaged, and the initial suspicion was that it suffered from wing icing."

"The technical capabilities of Factory 182 are relatively limited, so they applied for foreign assistance and needed us to help find out the specific cause of the accident and improve the aircraft."

"Before the start early tomorrow morning, there will be a Boeing 737 landing at Xiangzhou Airport, you take that plane to Nanzheng, and we will talk about the rest of the things after we arrive."

Hearing this, Chang Haonan was also in his heart.

The Y-8 wing is icing.

In the original timeline, this was a long-standing problem that plagued the Huaxia Air Force for nearly 40 years, and it led to extremely heavy losses.

For example, on June 3, 2006, an Air Police 200 early warning aircraft crashed while performing a mission, and all 40 people on board, including the crew, were killed, 34 of whom were senior engineers who tested radar and electronic equipment, which dealt a heavy blow to the development of China's avionics field.

He even knew some of the victims.

According to the investigation, although there were non-technical factors such as overloading of the aircraft (a lot of additional test equipment was installed), the main cause was the pitch axis instability caused by the icing of the wings.

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

"Okay teacher, I got it."

"See you tomorrow."

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

He did not know whether the 1996 accident existed in his previous life, after all, it was only a second-class accident with no casualties, and it may not be publicly reported and publicized.

But this is undoubtedly an opportunity for redemption -

Including the June 3 air crash, the Y-8 crashed at least 4-5 planes for the same or similar reasons in the first 20 years of the 21st century alone.

Even if Chang Haonan has changed a lot of things after his rebirth, at least in the next ten years or so, it is impossible for the People's Air Force to completely eliminate this model.

It will also be almost the only medium-sized special aircraft platform available to the aviation industry before the Tu-204/214 is localized.

Therefore, if the problem of wing icing of the Y-8 can be completely solved at the moment, many unnecessary losses can be avoided.

Those excellent pilots and engineers can continue to shine in their posts......

This night, Chang Haonan had insomnia.

After getting on the Boeing 737, he finally got some rest on the plane.

Until woken up by the wheels touching the ground and the subsequent sound of brakes.

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

The cold wind blowing on his body in early November made him shiver involuntarily, and at the same time, he instantly sobered up.

"Teacher."

Du Yishan has been waiting next to the gangway for some time.

After approaching, Chang Haonan noticed that his eyes were bloodshot, and he was afraid that he hadn't slept all night last night.

"Come with me, let's take a look at the plane first."

The two teachers and students got into a jeep next to them, one left and one right.

"After I called Ling yesterday, I took the comrades of Factory 182 to do an all-night data analysis, and the cause of the accident has been basically sorted out."

As a veteran of the aviation system, Du Yishan is still very capable in these areas that require experience, despite his advanced age:

"Due to initial design problems, the Y-8 only used engine hot air for heating on the leading edge of the intake tract, the leading edge of the wing and the engine guide blades, while the leading edge of the tail, propeller and hub fairing only had electric heating."

"When the aircraft is close to landing, the environmental conditions are atmospheric temperature 2 °C, humidity 71%, temperature dew point difference 4 °C, just under the conditions that are most likely to freeze, the horizontal tail of the aircraft quickly freezes, but because the Y-8 does not have a convenient means to observe the tail situation, so when the pilot realizes that the flat tail situation is not right, it is too late to turn on the electric heating de-icing device."

"According to our calculations and analysis, the supply of hot air in the engine is sufficient, so the main wing and the engine intake will basically not be iced, but the problem of tail ice is more complicated, and the progress of this Yun-8 modification is very urgent, you need to use simulation to improve efficiency, and minimize the number of flight tests."

Just as Du Yishan was briefing Chang Haonan on the situation, the jeep had already driven to a large parking shed.

Inside, there was a strange-looking plane parked, or rather, lying on its stomach.

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

This is a Y-8J maritime alert aircraft.

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

(End of chapter)