Liu Changxi saw Li Zhan land on the runway of Factory 012 as if he were going home, and taxied the plane to the tarmac like he was going home.

All in all, it feels like Li Zhan has actually been working in Factory 012 and is very familiar with this place. However, after Li Zhan mentioned that there were some things that could not be said, Liu Changxi suppressed all his doubts and curiosity, and treated it as if nothing had happened. They were ordered to drive the Y-8F-400 back to the factory for maintenance.

According to the plan, the next day he and Li Zhan took a civil airplane back to the tourist airport, and he went to Guibei, and Li Zhan returned to Zhongnanchang Station to start his exploratory flight work. But the next day, he received a notice to return on his own and did not have to wait for Li Zhan.

Until the fifteenth day, when the smell of wine on New Year's Day in 2012 had just dissipated and was about to usher in the 2012 Spring Festival, a director of the 012 factory personally sent Li Zhan to the airport.

Li Zhan, who had changed into civilian clothes, took Nanfang 1993 flight to Short Sha, and the Short Sha Garrison District would send a car to pick up the plane at Short Sha Honghua International Airport. The Spring Festival transportation has already begun, and it is difficult to buy a ticket to fly to the tourist airport in a short period of time, so the only resort is to fly to the Honghua Airport in Short Sha, and the troops will send a car to pick up Li Zhan and return to Zhongnanchang Station, which is more than 300 kilometers away.

Non-military activities are not allowed to affect the normal production and life of the locality, so Li Zhan needs to buy tickets through normal channels like everyone else, so he can only toss and turn like this.

Perhaps it was because of habit, while waiting for the plane, Li Zhan walked to the area of the special military seat and saw that the place was full of passengers, so he turned around and walked towards the place where there were few people, and took out his brick mobile phone to call Zhang Yuan, who was far away at the Beiku Meteorological Observatory.

"Lao Zhang, I'm Li Zhan, what's the matter?" Li Zhan raised his voice a little so that what he said in the slightly noisy waiting hall could be heard more clearly.

Zhang Yuan is on duty.

"Yo, why did Instructor Li remember to call me? You don't know what the situation is in the winter every year, I am now eating and living in the duty room. What are your instructions? Zhang Yuan said with a smile.

The Beiku Meteorological Observatory is not only the backbone meteorological station of the Air Force but also an important supporting meteorological station of the national meteorological monitoring and forecasting network, and it is also the northernmost large meteorological station in the west, so every year after winter, the Beiku Meteorological Observatory will be busier than before, and every cold air from the south of the Greater Siberian region is detected by them first, and the data they provide is a basic reference and is very important to the national weather forecasting network.

Li Zhan said, "How can I instruct you, there is nothing else, I am preparing to fly to Short Sand Honghua Airport at Chang'an Airport at this time." I've been paying attention to the cold air coming south these days, and it's much worse than usual. I think most of the South is about to experience catastrophic weather. ”

Speaking of business, Zhang Yuan became serious, "You have the same judgment." Yes, we have issued a warning to the local meteorological department that the weather will be very bad in most parts of the south in the next three days, and we recommend that they take relevant precautions and precautions. ”

"Do you think there will be a snow disaster?" Li Zhan asked in a deep voice.

Zhang Yuan said, "It's very likely. The latest cold air will replenish the southward movement within 24 hours, and I analyze that it will catch up with the previous wave of cold air in the central and southern regions. If only that's the case, it's not bad, but a tropical wind signal has formed in the western part of the South China Sea. Interaction, I think there is a high probability of ice and snow disasters. Remember the Sanhe flood, when it wasn't for the huge whirlpool of Typhoon Super Mario, the situation would not have been worse to that extent? This year's situation is the same. ”

Li Zhan said worriedly, "It is the peak period of the Spring Festival, and if there is an ice and snow disaster, the impact will be great, and millions of tourists will be stranded because of this, and this Spring Festival will not be easy." ”

"There's no way, there's only so much we can do." Zhang Yuan said.

After being silent for a while, Li Zhan asked, "How is the weather from Chang'an to Short Sand, tell me." ”

"Why are you asking this?"

"Aren't I going to fly short sand, I know what to do."

Zhang Yuan couldn't cry or laugh, "You can't take a plane, the civil aviation meteorological department is very professional now, their forecast is no worse than ours, since you can fly, you can sit down with peace of mind." ”

Having said that, Zhang Yuan still informed Li Zhan about the weather conditions along the way. As Zhang Yuan said, the weather conditions along the way are neither good nor bad, and the worst part of the weather occurs in the middle reaches of the Yangtze River, but at that time, the flight was cruising at an altitude of 10,000 meters, and it will not be affected by these bad weather.

The most important thing to pay attention to in any flight is the weather during take-off and landing, theoretically speaking, as long as you fly high enough, no matter how bad the weather will not affect the aircraft. But take-off and landing is a process of frequent changes in vertical height, which is most susceptible to weather.

After learning more about it, Li Zhan relaxed his heart a little and had the courage to board the plane. This seems to be a common problem for pilots, and the more skilled the pilot, the more resistant they are to handing over control of the aircraft. Like old drivers, they prefer to be driven by themselves rather than leave their fate to others as passengers.

If it weren't for the long distance, Li Zhan would rather take the train.

After hanging up the phone and looking up into the distance, Li Zhan gasped, and in the ten or so minutes of talking to Zhang Yuan, the number of passengers in the waiting hall had increased by at least one-half, and there was already a bustling scene. It's only 9 o'clock in the morning, and maybe today's peak has not yet arrived.

A girl who looked like a college student walked over, she walked to Li Zhan in a plain dress and carrying a backpack, looked down at the camouflage backpack with the logo of the Bayi Army that Li Zhan put at her feet, grabbed the corner of her clothes with both hands and showed a nervous smile, "Big brother, I am a student of Xi'an Jiaotong University, I came to catch a plane early in the morning and found that the money was lost, I am very hungry, can you lend me dozens of yuan to buy a box lunch?" I will leave your contact information, and I will change it to you when I get home. This is my student ID. ”

As he spoke, he handed over a student ID.

Li Zhan glanced at it, fake, his girlfriend is a student at Xi'an Jiaotong University, how can fake documents escape his eyes. And this girl's lies are full of mistakes and omissions, and after a little brainstorming, I know that I have met a little liar who cheats money by telling stories.

Then Li Zhan took out the money from his trouser pocket, picked out a fifty sheet and handed it over, "Eat more." ”

"Thank you, thank you, thank you, please leave me a contact information, I will definitely return it to you." The little liar girl said busily, looking at the big handful of hundred-yuan bills in Li Zhan's hand, her eyes lit up.

Li Zhan said, "No need, it's not easy for you to celebrate the New Year." ”

The little liar girl's face stiffened slightly, and finally she was embarrassed to continue telling the story, bowed and turned away.

After talking slightly, Li Zhan raised his eyes and looked at the flight information column, yes, it was really delayed.

Sighing again, Li Zhan put the stack of more than 10,000 yuan of banknotes into his trouser pocket, like he was carrying a handful of tissues and preparing to. Lift your backpack and walk towards the glass wall where you can see the flight area.

Because he was using a civilian communication network, Li Zhan did not mention to Zhang Yuan what he had done in the past half a month at Factory 012, otherwise he might have had a discussion with Zhang Yuan about the icing of the wings of the Y-8. Zhang Yuan is a meteorological expert, and he is a meteorological expert who has a close relationship with the flight, and he knows the aircraft very well, and he believes that Zhang Yuan will definitely have some useful views and suggestions.

The problem of icing in the wings of the Y-8 is a complex systemic problem, a historical problem that has been left over from the time when the An-12 was copied. If you look at a related system alone, it is all compliant, such as the de-icing system. However, if you look at it as a whole, it will form a fatal flaw, resulting in many models of this aircraft can only be used in specified areas.

To completely solve the problem, it is necessary to design from scratch, and to use the overall design technology to repeatedly test the overall performance, such a design concept is still fresh for the 012 factory. In the past half month in the 012 factory, Li Zhan has provided guiding suggestions and opinions on practical use for the R&D team of Y-X through his own practical experience.

Li Zhan believes that there is no technical obstacle to permanently solving the problem of wing icing, but he is also very aware that the same problem is an incurable disease in the world, and the technical requirements are not high, but the requirements for the logical relationship and actual use of the entire system are very high. This is because the de-icing system and protection system need to face a variety of complex weather, continental climate, marine climate, low latitude area, high latitude area......

The most important thing is that the Y-X is a military aircraft, and the most basic premise is that it is used in the battlefield environment, and it is used in all airspace, such as taking off and landing at field airports in high-altitude areas, and civil aircraft do not need to do so.

Taken together, it's easy to meet the performance metrics required by the Air Force, and it's not just about solving the problem of wing icing—your solution must work in synergy with other system solutions, not contradict them.

Outside, there was light snow and the temperature was below freezing.

Li Zhan stood on the curtain wall and looked through the glass at the nearby parking stand, where a de-icing vehicle was being used to de-ice the upcoming flight, which was a necessary means to ensure that the plane flew in winter. In the far flight area, there is also a set of de-icing devices at the take-off position of the runway, and some flights with long waiting times can accept a second de-icing to ensure that no ice crystals remain on the wings.

It is impossible for military tactical transport aircraft to have such ground support conditions in wartime, and all problems must be solved by themselves. Therefore, the de-icing system is required to work normally anytime and anywhere to ensure that the aircraft can fly normally.

When making the proposal, Li Zhan emphasized the importance of greatly improving engine performance, and he even suggested that the Y-X tactical transport aircraft must have the opinion that it can fly 50 kilometers with only one engine without three engines. However, it is clear that his opinion is considered extreme, and the Air Force's indicators clearly require that the aircraft be able to continue to fly XXX kilometers with the remaining two engines working normally.

Significant improvements in engine performance are also relevant to other systems, especially de-icing systems that require heat from the engine.

In any case, Li Zhan believes that Factory 012 will solve all the problems well.

After an hour of delay, Southern Flight 1993 notified the boarding, Li Zhan sorted out his clothes and strode to the boarding gate, the wind was gloomy.