Return to 2000: Captain of the Great Powers

"You mean you want to do the maneuver without radius at Qitai Airport again?" After hearing Xu Cang's introduction, Bi Lin quickly realized Xu Cang's idea.

In fact, as a witness to the shocking operation at Qitai Airport, Bi Lin understood Xu Cang's thoughts better than anyone else.

"Yes, but not entirely." Xu Cang pondered for a moment, and organized his words a little: "The airflow from the air vent in the valley near Qitai Airport is relatively stable, and it is easy to control the aircraft in a relatively critical state. However, The airflow in the Alps this time is not only stronger than the mountain pass at Qitai Airport, but also quite unstable, and it is impossible to maintain a state of passing a stall angle of attack."

"Then what do you mean?" Bi Lin was a little confused: "Or, you want to complete the approach with a high surface speed and a low ground speed under a super headwind?"

"That's almost what it means." Xu Cang paused for a moment: "Old Bi, do you think it's feasible?"

Bi Lin was obviously silent for a while, and seemed to be seriously thinking about the feasibility of this plan: "Can you guarantee that the airflow will be completely parallel to the direction of the runway? According to what you mean, in order to achieve ultra-low ground speed conditions, the headwind must be close to the runway." One hundred knots. As long as the wind direction has a slight angle with the direction of the runway, the resulting crosswind component will be unparalleled. The aircraft can withstand greater headwinds, but it is difficult to withstand greater crosswinds."

Xu Cang seems to have considered it carefully: "The core of the local cyclone is a wedge-shaped tornado, with a length of more than one kilometer, and its EF level can reach level [-]. According to the cloud map, there will be a short moment in the center of the tornado in the near future. Passing over the manor airport, this will cause the airflow over the manor to be completely parallel to the direction of the runway. After terrain friction and obstruction, the wind speed will be reduced to about [-] kilometers per hour, which I think is a relatively appropriate value."

Unlike the commonly used Beaufort scale, tornadoes usually use the Enhanced Fujita Scale, which is only 0-5.So far, no EF6 tornado has ever been found.

According to conventional experience, the EF series of a tornado is related to the shape of the tornado.For example, the EF level of chimney tornado and rope tornado is slightly lower, generally not more than level 4.

However, the EF level of a wedge-shaped tornado is usually higher, and can basically reach the EF4-5 level.

Of course, there is also a kind of twin tornado. The level, intensity, and range of influence of this type of tornado are not certain.

According to satellite cloud images, the width of the tornado at the core of the Alps cyclone has not yet reached its maximum value, and its EF intensity should be between level [-] and level [-], with a predicted wind speed of [-] kilometers per hour.

However, there are many gullies in the mountains, and the airflow will be much reduced when it passes through the mountains. In the end, the wind speed and airflow in this field should only be fixed at [-] kilometers per hour. This kind of wind speed is more in line with Xu Cang's requirements.

If the tornado is too strong and reaches level EF5 or above, the wind speed usually exceeds 350 kilometers per hour.Such wind speeds are too high for approaching aircraft, even through terrain obstruction.In some extreme cases, the aircraft in the landing configuration cannot form a positive ground speed under such a strong headwind, which is obviously not feasible.

But if the wind speed is too low, it will not be able to achieve the effect of greatly reducing the ground speed of the aircraft.

The wind speed of [-] kilometers per hour at the end of the game was just right, adding one point would be too much, minus one point would reduce it, perhaps this is the only place where the sky favors Xu Cang a little bit.

"EF4 level is a little bit bigger, but the mountainous terrain is rugged, and the wind speed in this field should be more appropriate under the terrain barrier." Bi Lin still agrees with the calculation.

Xu Cang doesn't talk about other fields, but he is flying, which is almost exhaustive.He will take all the factors into consideration, all Bi Lin has to do is to check for omissions and fill in the gaps.

But the obvious fact is that there seems to be no need to change Xu Cang's plan.

"If you want to reduce the ground speed to an extremely low level with a strong headwind, what is your expected ground speed?"

Xu Cang almost didn't think about it: "Within [-] knots, this will be a relatively safe value. I will choose the landing configuration according to the actual wind speed. The airflow in this field is too chaotic. If all the flaps are released, it may not be possible to maintain the landing configuration." Also, I can't guarantee that the terrain will cut the wind down to [-] km/h, and I'll use the flaps restrictively if necessary."

"Yes, releasing too many flaps will reduce the aircraft's ability to resist gusts. It is indeed a good choice to partially use the flaps." Bi Lin thought for a while: "In addition, my suggestion is not to prematurely increase the The landing gear was deployed earlier for the stability of the aircraft."

"Huh? Why?" Xu Cang was taken aback. In his plan, he really had the idea of ​​lowering the landing gear earlier.

After the landing gear is lowered, it will stabilize the yaw of the aircraft like the vertical tail, so if there is really too much airflow, Xu Cang intends to lower the landing gear earlier.

However, Bi Lin didn't expect to directly deny Xu Cang's idea.

"Xu Cang, you still don't fly enough. Maybe you haven't encountered this kind of extreme ice and snow weather, so your understanding is insufficient." Bi Lin paused: "I used to fly in the northeast. The snowy weather at minus 34 degrees is of course not comparable to the current situation in the Alps. However, I couldn’t go down that day because the altitude was too high, so I put the landing gear in advance to increase the rate of descent.”

Xu Cang frowned. It is a very normal operation to release the landing gear in advance to increase the descent rate, but hearing what Bi Lin meant, something big might happen later.

"I seemed to be three or four minutes ahead of schedule, but it was these three or four minutes that almost cost me my life." Even after so many years, Bi Lin always feels lingering fear when thinking about the past: "There is nothing unusual ahead, but As soon as the plane touched down, the taxiing direction immediately lost control. No matter how I tried to control it, the plane still rushed out of the runway. At that time, due to the impact, the engine caught fire. Fortunately, I ran fast. The plane exploded."

Bi Lin stabilized his mood a little: "Later, after investigation, it was found that snow water had accumulated on the landing gear and frozen, directly freezing the rotation shaft of the landing gear. My right landing gear wheel did not rotate after touching down, and it has been in the Locked state. Later, I looked at the wheels of the right landing gear, and all the tires in contact with the ground were worn away, and the hubs were exposed. Xu Cang, this is the only flying accident in my life.”

"Xu Cang, you have to remember. Ice accumulation is always a big taboo in flying, and you have to guard against it." At the end, Bi Lin specially instructed Xu Cang.

Xu Cang was silent for a long time as he heard it.He had never encountered too much rain and snow, let alone such exaggerated ice accumulation.After the snow water freezes, it can directly freeze the wheels of the landing gear. Xu Cang really never thought about this kind of thing.

This is experience, the most valuable experience.

"Old Bi, I understand." Xu Cang said from the bottom of his heart, "Thank you."

The current situation in the Alps is definitely worse than Bi Lin's situation in the Northeast.At the end of the year, the landing gear was released a little earlier, and it was almost glorious in place. If Xu Cang still followed the plan, he would die without a place to bury him.

You know, Xu Cang planned to lower the landing gear according to the situation after entering the cyclone area.This is not three or four minutes ahead of time, it is estimated that it will be close to 4 minutes ahead of time. According to the situation in the Alps, I am afraid that all the landing gear wheels will freeze to death.

The thickness of the snow at Zhuangzhuang Airport has seriously exceeded the standard. If the ground slips, wouldn't it be a complete dead end?
Just for this suggestion, Xu Cang felt that the call to Mr. Bi was extremely worthwhile.

No, this can't be said to be worthwhile, it should be said to be life-saving.

"Also, I suggest only setting the flaps in half." Bi Lin said: "The presence of the flaps can stabilize the aircraft. However, it is not necessary to release all the flaps. This is not about resisting gusts of wind." The situation, or not entirely. If according to what you said, a positive headwind parallel to the runway can be formed at a certain point in time at the airport, then the configuration of the aircraft and the approach speed are not too important, the headwind is enough Limit the ground speed to a level that pleases you."

"Then how much the flaps should be used should not focus on the gear selection of the approach speed, but to deal with turbulence and some unexpected situations. You and I both know that, like the landing gear, the existence of the flaps will also be To increase the stability of the aircraft to a certain extent, it is understandable to intend to increase the stability of the aircraft in a turbulent environment. However, no matter how stable the aircraft is, once the airflow suddenly changes, the aircraft will still have a huge amount of state changes in that environment At this time, the stability of the aircraft is not a favorable factor, because it will inhibit the pilot's short-term stress response operation."

"Therefore, the release of half of the flaps, I think, is a good choice, not the choice of positioning the flaps for the purpose of correcting the ground speed." Bi Lin coughed lightly: "Xu Cang, your technique is perfect. Flawless, any technical problems are not a problem for you. What you lack is just some experience accumulated over time. For ordinary people, in such windy and turbulent weather, the more stable the aircraft, the better However, for you, compared with the stability of the aircraft, you should believe in your own technical level. You should correct the influence of turbulence on the aircraft with the ability to see through the opportunity. We always correct the aircraft from time to time In the slightest, if the plane is too stable, it is a bad thing."

In fact, this is already a bit of fighter thinking.

The stability and maneuverability of an aircraft are always a pair of pros and cons.The meaning of Bi Lin is very simple. Ordinary people do not have such a strong control ability, so they naturally tend to be more stable in order to make less corrections to the aircraft.

But someone like Xu Cang whose technology has been perfected can't suppress the maneuverability of the plane too much, because this means making use of its weaknesses and avoiding its strengths, which is naturally not advisable.

"However, Xu Cang. You have never flown in such harsh and violent weather conditions. In it, if you are not careful, you will only die. To be honest, I don't recommend you to go." Bi Lin was extremely sincere : "Whether it is civil aviation or the entire history of flight, it is extremely rare to survive in such an environment. You have to understand that the problem you face is not a landing distance. You may not even be able to approach the center of the cyclone."

Xu Cang just smiled and said, "Old Bi, there are some things you don't know yet. You are right in one sentence. Any technical problems are not a problem for me now."

"Really?" Bi Lin didn't say anything, but suddenly changed the subject: "Xu Cang, I hope you don't blame him for what happened to old man Si before."

When mentioning this matter, Xu Cang's face didn't fluctuate too much: "That's the old man's wish, so naturally I won't blame him."

"Xu Cang, Gong Yue of the Xianchi branch is not bad in nature. He is from the Northwest, and he wants to be independent so that he can contribute to the development of the Northwest." Bi Lin said: "Before, most of the Muhua headquarters were It is restricting the Xianchi branch. On the one hand, it extracts a large amount of profits from it, and on the other hand, it does not allow it to develop freely, which made Gong Yue's heart grow deeper."

Xu Cang raised his eyebrows, it was the first time he heard Gong Yue analyzed from the heart.If Bi Lin is right, then this suggestion will have a decisive effect on dealing with the Xianchi branch.

"I see, I already have some direction." Xu Cang said: "Thank you, Mr. Bi, for reminding me."

"Everything should be done." Bi Lin paused for a moment: "If you have already made up your mind, then I will naturally not stop you. I wish you good luck."

Xu Cang hummed: "Old Bi, then I'll hang up."

As the phone was hung up, the dark room was plunged into darkness again.Xu Cang just sat so quietly, neither speaking nor moving, as if he had merged with the darkness.

And in the office of the director of the Hanjing Flight Test Institute thousands of miles away, the sun outside is mild at this moment, without the bleak feeling of Munich at all.

However, compared to the atmosphere outside, the atmosphere inside the office is extremely chilling.

A video is playing on the TV in the corner of the office. If Xu Cang is here, he will definitely find that this video is the video of him landing at Munich Airport on British Airways Flight 531.

At that time, the European Civil Aviation Conference happened to be held near the airport, and a large number of media personnel brought professional camera equipment to capture the video of Xu Cang landing clearly.

However, this video has not been made public yet, but it has already fallen into Bi Lin's hands, which shows how powerful Bi Lin is.

The effect of professional equipment shooting is very good. Even before the plane landed, the camera zoomed out a bit to capture all the details of the plane landing.In the picture, it can be clearly seen that most of the right wing of the Boeing 777 of British Airways is broken, but the plane landed on the runway in an incredible state.

"How did he do it?" Beside Bi Lin, Chen Gang, chief of the flight test academy, was puzzled: "Or, how did he stabilize the plane before approaching. If the wing breaks, the plane should be in the It just got out of control in an instant."

"Perhaps it is to exchange the functions of the elevator and rudder, and control the aircraft in a more partial way." Bi Lin sighed: "I said before that he has not reached his peak, but I really haven't. To think he was that high in his prime."

Chief Chen Gang's face is not very good: "Dean, this kind of talent should be called to the flight test institute immediately, this is where he realizes his value. I have read the news about the Alps, and it has been set as a no-fly zone by EASA. Let him pass, in case something goes wrong!"

"You don't understand." Bi Lin shook his head: "He has reached the state of perfection. The so-called clear mind and nature can see God. If he looks directly at his inner heart, he will find that he is a god."

Chief Chen Gang took a breath: "Dean, how is he better than you?"

"Before this incident, he was not as good as me. After this incident, I am not as good as him, a lot." Bi Lin's mood was a little complicated: "There are really people in this world who have honed their skills to such a flawless state, it's a pity, it's a pity. "

Chief Chen Gang's mind moved slightly, he had always regarded Bi Lin as the goal of his life.If Bi Lin commented on Xu Cang like this, then he didn't even need to be jealous.

"Xiao Chen, after a while, you will have to worry about the flight test institute." Bi Lin said suddenly.

This sentence directly changed Chen Gang's expression: "Dean, after Mr. Si passed away, Director Li never asked his teacher to question him. Maybe this matter is not as serious as imagined."

"Impossible. I presumptuously advocated that the Northwest should also be handed over to Xu Cang. I committed a big taboo. Taking the blame and resigning should be my end." Bi Lin sighed: "It's okay, I'm old too, the future is yours Yes. Xiao Chen, you are quite stable. I am relieved to leave the flight test institute to you. By the way, don’t mention the matter of forcibly summoning Xu Cang to the hospital in the future. He has his own way, how he wants to go, then Follow him."

Chen Gang's heart trembled, and he lowered his head: "I see, Dean."

Time flies by in Munich, Germany.When the first ray of sunlight fell on the ground in the morning, the heartbeat that broke the silence suddenly sounded. Xu Cang, who had been sitting in the room all the time, let out a breath of foul air: "Finally. It has begun!"

Due to some unexpected conditions, the difficulty of the rescue flight here is much higher than planned.Xu Cang entrusted Richard with the final inspection of the plane, and he adjusted himself to cope with the flight in the peak state.

Xu Cang changed into clean clothes, which Richard specially prepared for him.

It was an extremely slim Italian suit, not so much a pilot's uniform, but more like a dress.

When he left the room and appeared in the lobby of the hotel, the relatives of the rich people had already dispersed, but the relatives of the employees of the manor hardly left. Even in the past two hours or so, more relatives Came from afar.

Facing the cool dawn in the morning, Xu Cang walked out of the hotel lobby and looked at the relatives of the employees who had been waiting on the slope for a long time.These people never left, and some even got dewdrops on their hair and eyelashes because they stood for too long.

Xu Cang didn't speak, but met the gazes of these people, and slowly walked towards the car Richard had prepared for him.The car would take him directly to the infield apron at Munich Airport.

Beside the car, Richard also changed into a pilot's uniform.Although he was a little old, he was slender and well-proportioned, standing there, he was a bit of a gentleman.

Richard raised his hand and greeted Xu Cang with a smile.

Xu Cang nodded, just wanted to get in the car.But at this moment, the first voice sounded in this silent and desolate morning, it was a woman's voice: "Mr. Xu Cang, can we wait here?"

Xu Cang didn't look to see who said it, because it was meaningless.His footsteps just paused, and beside him, Richard also cast his gaze at him.

"Just wait." Xu Cang lowered his head and entered the car, his voice only echoed around him: "Whatever you want will come."

As the car started, it quickly disappeared from everyone's sight, but none of these people left.

Xu Cang told them to wait, so they should wait.

When Xu Cang appeared at the airport, the CS300 had already been towed to a remote stand, surrounded by only some maintenance and ground service personnel, and a large de-icing fluid spraying vehicle.

The plane here is very close to the end of the runway, and Munich Airport in Germany does not have a dedicated deicing station for the end of the runway, so we can only spray deicing fluid here.

In order to ensure the effect of the anti-icing fluid as much as possible, the car will not be deiced by shutting down the car for a while, but will be deiced by the slow car.

After Xu Cang got out of the car, he did a walk-around inspection.He trusted Richard enough to not pay too much attention to the condition of the plane itself.Just as he circled around and wanted to get on the plane, he seemed to think of something and looked at the deicing vehicle not far away.

"What's wrong?" Richard noticed Xu Cang's strangeness, and followed Xu Cang's line of sight: "Is there a deicing vehicle? What's the problem?"

Xu Cang didn't say much, but went straight to the deicing truck. Richard didn't know, so he followed.

When he got closer, the operator of the deicing truck got off the truck and saw Xu Cang: "What's the matter?"

This person's accent was heavy, but Xu Cang could still understand it vaguely.

Xu Cang pointed to the deicing vehicle: "What type of anti-icing fluid is it?"

The operator didn't answer right away, but first glanced at Richard, and then said, "It's SAE Type [-]."

"SAE Type [-]?" Xu Cang showed a pensive look.

Richard leaned aside: "Xu Cang, this is the Type [-] anti-icing fluid that was just transferred from the outside. It turns out that it doesn't exist here. What's the matter, is there any problem?"

Xu Cang pursed his lips, glanced at the operator, and said suddenly: "Let's release some."

The operator was startled: "What?"

"I mean release some anti-icing fluid." Xu Cang repeated.

"This" the operator was stunned: "Our regulations only allow spraying of the aircraft body, and there is no such thing as spraying anti-icing fluid on the ground."

Richard also never thought that Xu Cang would ask the operator to release some anti-icing fluid on the spot.However, after the initial shock, Richard understood Xu Cang's concerns: "Xu Cang, are you worried about the problem with the anti-icing fluid? No way, this kind of thing can't happen."

However, Xu Cang didn't care about Chad at all, and said again: "It doesn't need much, just release a little bit."

A strange look flashed across the operator's face: "This gentleman, we really don't have this kind of regulation on spraying anti-icing fluid. If I do this, I will be punished."

At this moment, Richard seemed to have a taste, and he didn't stop Xu Cang anymore.

"We will compensate you for the losses you suffered from punishment." Xu Cang pointed to a drain not far away: "Facing there, let's put it."

The operator became more and more entangled: "This, this. Isn't it good!"

However, Xu Cang shouted suddenly: "What are you hesitating about, let it out!"

PS · I am too tired today, so I should write less, and I should write more tomorrow.It’s only about 300 yuan to order a high-quality product. Can it be a high-quality product?If it can be a high-quality product, I will vomit blood ten times that day!