Return to 2000: Captain of the Great Powers

Chapter 75 The God of Mental Arithmetic (please subscribe!)
The student on the right seat opened his mouth when he heard this, while the Airbus student standing behind looked at Jin Fuli with disbelief.

Can you still do this, Boeing pilots fly Airbus simulators, there is such a saying?
"It doesn't matter! As I said, as long as you can land the plane, I don't care what method or who flies it." Jin Fuli leaned back on the seat: "Xu Cang, think about it, this plane is not good fall."

There was no anxiety or hesitation on Xu Cang's face, and his eyes entered the water calmly: "There are still twenty nautical miles away from this field, and the altitude is more than 2 feet, just right!"

It just so happened that these three extremely ordinary words came out of Xu Cang's mouth, but they felt as immobile as a mountain, as if this extremely difficult project in the eyes of others was nothing more than an easy task, and it could be accomplished in a short time at an altitude of [-] feet. The final conclusion came to a conclusion.

Jin Fuli squinted his eyes: "That requires you to be able to fly at the speed of the green dot all the time. How do you fly without a reference?"

The green dot speed can make the aircraft lose power to fly the effect of the best glide ratio.If calculated according to the best glide ratio, the height of 2 nautical miles and more than 2 feet is indeed enough to fly to this field.But this is an ideal state, which is difficult to achieve most of the time, and naturally it is impossible to achieve the effect of flying [-] nautical miles at an altitude of more than [-] feet.

The difficulty lies in that the speed of the green point will keep changing according to the height and weight of the aircraft, and the height and weight of the aircraft itself are also changing. Without a table reference, it is difficult to adjust the green point speed of the aircraft in time.

At this time, the altitude margin of the aircraft is very small, and if there is a slight deviation, the aircraft will not be able to fly to the field.Moreover, Xu Cang has to consider that after the landing configuration is established, the height-to-distance ratio of the aircraft will change unexpectedly, which is quite different from the clean state.

In general, a gliding landing with two engines turned off is a great test of the crew's computing power.It's not easy without a computer and a manual to help, let alone without that extra help.

However, Xu Cang pointed to his brain: "It's okay, the data is all in my brain."

The Airbus trainees in the back all gasped. This Boeing boy is so arrogant that there is no limit. The green dot speed table is not just one or two lines, but a 4 by 11 table. If there is a data misremembered No, the plane can't even land.

But Xu Cang's expression fell into the eyes of the right-seat co-pilot, it wasn't a dead duck's mouth at all, it seemed that everything was logical and relaxed.

"He really knows how to fly an Airbus?" The hair of the right-seat co-pilot was a little messy under the blowing of the air conditioner. He was disheveled. When did the pilots of the Boeing fleet become so versatile? I never heard of it!

Compared with the doubts of the Airbus trainees, Jin Fuli clapped his hands and laughed: "Very good, very good! If you can land on the runway, I will let this kid go today, although his performance makes me feel sick."

The student seated on the right lowered his head and remained silent, while the two observing behind him were also trembling.From what Jin Fuli said, the captain of the Airbus was indeed very angry.

Xu Cang didn't say anything more, there was enough wasted tongue, there was no need to waste any more time.

Now that ECAM ENG DUAL FAILURE is not available, you can only complete the corresponding disposal items from memory.But most pilots don't remember this, so without ECAM, without the quick checklist, you have to be dumbfounded.

But Xu Cang is different, he has never been the same as others!
"For me, you can do it, can you?" For the student on the right, Xu Cang did not dare to have too high expectations. If he can't even do what he listens to, then Xu Cang will consider himself alone. After completing the disposal, even for him, it only increased a little difficulty.

But under the pressure of a lot of mental calculations that will be ushered in the near future, it is also good to have others to help share it.

The student on the right seat was a little nervous at the moment, Xu Cang's voice was not loud, but full of majesty, as if he had returned to the state of the chief teacher of the General Administration.The student whose mind was blank had already begun to doubt himself. He didn't know if he could cooperate well with Xu Cang, and continued to fall into silence.

Xu Cang did not answer after waiting for a second or two, and had already lost his last patience, only to hear him suddenly shout: "Answer me!"

The sound was so loud that it almost overturned the entire simulated cabin, and the ears of everyone in the cabin were buzzing.

Even people like Jin Fuli feel agitated and unable to hold themselves.

"It's so imposing!" Jin Fuli never thought that there was any nonsense and domineering talk, only that people have one pair of eyes and two hands, what difference can there be?
But seeing the current Xu Cang with his own eyes, he really sighed, people are indeed different.

Xu Cang yelled at the student on the right seat who was already flustered, his mind exploded, his lips were trembling, he didn't even know why he was afraid of a Boeing pilot, but he was just afraid!
However, the student seated on the right, who was clearly in a state of confusion, forcibly restrained his emotions under Xu Cang's encouragement, swallowed a mouthful of saliva, and said forcefully, "I can do it!"

"Okay!" Xu Cang didn't say much, and went straight to the point: "Verify that the emergency power supply is connected."

The power of the emergency power supply comes from the emergency engine. Similar to Boeing, the power of the Airbus 320 mainly comes from two engine-driven generators, but unlike the Boeing 737, the Airbus 320 also has an emergency engine, and its hydraulic power comes from The ram air turbine, the small fan that protrudes from the belly of the aircraft, automatically extends in the event of a severe hydraulic and electrical failure.

Under normal circumstances, the emergency power supply will be automatically connected, but it is not guaranteed that there will be a problem, so it needs to be verified.This emergency power supply will provide the aircraft with minimum power and is quite necessary.

The student in the right seat quickly confirmed that the emergency power had been turned on, otherwise the instruments in the cockpit would have been completely black.

"Thrust handle, slow!" Xu Cang murmured, and put the thrust handle away.

Afterwards, Xu Cang gave another command: "Close FAC1 and then open it!"

FAC is the Flight Stability Augmentation Computer, which is a very important device, and there are two sets, namely FAC1 and FAC2.Under normal circumstances, FAC1 is the active one and FAC2 is the standby one.As long as one flight stabilization computer can still be used during the flight, it can basically maintain normal operation with little impact.But if both parts fail, the impact will be relatively large, at least in the aircraft yaw, envelope, low energy warning and windshear prediction functions will have extremely adverse effects.

In addition, the laws of flight operation will also be downgraded. The specific performance is that the pitch is changed from the normal law to the standby law with protection, and the roll and yaw are both downgraded to the direct law. The protection of the aircraft for each characteristic speed is missing. If you are careful, it is easy to exceed the speed limit, which is quite dangerous.

Therefore, Xu Cang had to restore the operation of at least one flight stabilization computer.

The student in the right seat was quite useful at this time, and followed Xu Cang's instructions to turn off a flight stabilization computer first and then turn it on again.Xu Cang kept his eyes on the status of the plane, but he could still devote his energy to monitoring the student's movements to prevent him from making mistakes.

After confirming that the action was correct, Xu Cang ordered without stopping: "Select the engine mode, and the ignition position!"

At this moment, Xu Cang has already adjusted the speed of the aircraft to close to 280 knots in the range of the best pitch attitude, which is a very suitable speed for the restart of the aircraft, except for the problem of engine failure during high-thrust operation , At this time, the speed should be greater than 280 knots to prevent the engine core machine from locking.

Xu Cang stretched out a finger: "We only try to restart once."

In Jin Fuli's setting, the aircraft has not been shut down for a long time, and the aircraft is not in a heavy rain environment, so there should be no need for repeated restarts.If it can't be started once, there is a high probability that it will be futile to try again.

And, most importantly, 280 knots is not an optimal gliding speed.That is to say, flying the same horizontal distance, the altitude loss of the aircraft at 280 knots is more than that at the best gliding speed.

Xu Cang's height margin is very small, which greatly limits his room for trial and error.If he can have a height of more than 3 feet now, it is not impossible to try it two or three times.

But the reality is that he only has one chance to restart!
Generally speaking, it takes 30 seconds to see the result after waiting for the engine to ignite, but Xu Cang will not wait like this, and directly ask the student on the right seat to turn on the APU.At this time, the altitude of the aircraft is not particularly high, and the success rate of starting the APU is relatively high.If the altitude of the aircraft is too high, sometimes the APU cannot be started.

Sure enough, as Xu Cang expected, the engine did not respond at all after trying to restart.Although this kind of attempt can be unlimited without any auxiliary conditions, and the APU bleed air will be available later, it will also help the engine start, but Xu Cang does not intend to try again.

At 280 knots, the altitude loss was faster than he expected.Theoretically, at a speed of 280 knots under calm conditions, the altitude of the aircraft will drop by 2.2 feet for every 2.5 nautical miles it flies.However, at the green dot speed, the aircraft travels 0.3 nautical miles before dropping a thousand feet.The difference between the [-] nautical miles and the difference between life and death is still very different, especially when Xu Cang noticed that the plane was still under the weak headwind, which was one of the reasons that caused the plane to lose more altitude.

He had no chance to try it anymore, so he really planned to complete the landing with both engines turned off.

"Engine master switch off for 30 seconds, then on!"

Under Xu Cang's command, the nervousness of the students on the right seat gradually eased, and their movements became faster.It's just that these scenes fell into the eyes of the Airbus trainees behind, which is really an anecdote.

A Boeing pilot commanded an Airbus pilot to deal with the failure of the Airbus simulator, but there was no sense of disobedience in this scene, as if Xu Cang was the captain of the Airbus, calm and calm.

If they hadn't seen it with their own eyes, whoever dared to describe such a scene to them, they would definitely call that person crazy.

One of the students gently pushed the person next to him with his elbow, and whispered, "Brother Wang, did he do anything wrong?"

Another student named Brother Wang is already a seventh-level co-pilot. He has just passed the inspection by the bureau and entered the stage of flying with the left seat.At this time, the co-pilot's theoretical level is considered to be the best, so you must be right to ask him.

The student named Brother Wang kept heaving his chest, not to mention whether Xu Cang did something wrong, just this calm demeanor is fascinating.

Jin Fuli's eyes are getting brighter and brighter, this is no longer uncut jade, it is clearly a peerless beautiful jade that can already shine.

Those blind people in the Boeing fleet are indeed trash, they don't even want such people, blind is not enough to describe.

Soon, Xu Cang ordered to put on an oxygen mask. After all, after the two engines were turned off, there was a problem with the aircraft's pressurization, and there was a risk of decompression.

After the APU is available and the aircraft descends below [-] feet, verify that the wing anti-ice is off, the APU bleed is on, and the engine master switches are again closed and opened one at a time.

At the same time, Xu Cang started to slow down the plane. He had confirmed that the engine would not be started again, so he had to adjust the speed of the plane back to the green dot speed.

At this moment, the weight of the plane is [-] pounds, it looks like [-] tons, and the altitude is less than [-] feet, so the speed should be around [-] knots.Xu Cang quickly moved the stick a little bit to slow down the plane to [-] knots, and then maintain this speed.

As mentioned earlier, under the condition of no wind, the same loss of 2.5 feet, the speed of 280 knots can fly 2.2 nautical miles, but the speed of [-] knots can only fly [-] nautical miles, the difference is quite obvious.

At a speed of [-] knots, the average rate of descent of the aircraft is about [-] feet per minute.

Seeing that Xu Cang maintained a speed of [-] knots, Jin Fuli pushed the Airbus trainee next to him: "Is this the speed of the green dot?"

Even if Jin Fuli has been flying Airbus for so many years, he usually doesn't remember this.The Airbus student has already checked it out: "The gold team, it's two hundred knots, he really knows."

Jin Fuli hummed, showing no overly surprised expression.Xu Cang's performance just now, if he wasn't the most thick-skinned guy in the world, then he should be really confident and arrogant.

Obviously, Xu Cang is more partial to the latter.

"You make preparations." It can only be said that Xu Cang's hand is terribly steady, saying that it needs a speed of [-] knots, and it really won't miss a single knot. People who don't know how to do it think it's an airspeed indicator its stuck.

After the APU was powered on, most of the power system was restored, and the student in the right seat subconsciously asked, "Which runway, approach, and blind landing?"

When Xu Cang heard this, he was stunned for a moment, and then waved his hand: "Forget it, I was thinking too much, you can do whatever you want, and in the end we still have to fly."

Since the average descent rate will basically exceed the descent trajectory of the three-degree glideslope when both engines are turned off, it will not be able to keep up with the guidance of the blind landing. Therefore, even if you want to fly a blind landing, you can't fly.

It's even hard to say whether it landed on runway 23 or 05. You can only see the height of the aircraft nearby.Judging from the current approach heading, it is estimated that runway 05 will be used.

"You can make a distance circle, five nautical miles, ten nautical miles and 25 nautical miles." Xu Cang thought for a while: "Choose the approach speed, our flap deployment plan will be different from usual, the flaps and landing gear All releases are subject to my password, and you are in charge of the speed control. Also, close the cabin and kitchen switches, and turn on the cabin signal board."

The reason why the cabin and kitchen switches are closed is to unload the load on the electrical system and prevent unexpected situations.

After the plane was lower than [-] feet, Xu Cang ordered the ram air switch to be turned on, and at the same time ordered: "After passing the transitional level, adjust the air pressure reference, turn off the crew's oxygen below [-] feet, and notify the cabin of the upcoming flight at [-] feet. Landing, broadcast anti-collision attitude at [-] feet, when touchdown, close the engine master switch and APU master switch, understand?"

As the altitude of the plane decreases, the headwind becomes stronger and stronger, and the actual altitude change of the plane is somewhat different from the description in the manual. Xu Cang has to calculate according to the data of the plane at all times, and the pressure gradually increases. It is impossible for him to carry the right seat all the time. The students are flying, just taking advantage of now to explain everything that will happen next.

To be reasonable, these are not difficult operations, so it’s not impossible to do all of these, right?

"I'll give you OK days for this field, and you'll have four nines of visibility, so fly!" Jin Fuli said casually.

The OK day is CAVOK, there is no cloud in the sky, and the visibility is four nines, that is, the visibility exceeds ten kilometers. This is the best weather, and there is no obstacle to the vision.

Reasonably speaking, Jin Fuli is still a bit humane, and he didn't make a mess of high or low visibility for Xu Cang.However, as long as the standard of visual approach can be met, Xu Cang doesn't care.

Compared with the weather and approach method at this field, Xu Cang was a little worried about the altitude of the plane at this moment.From the beginning of the disposal, the altitude margin of the aircraft was very small, and the altitude lost by restarting the engine, the altitude of the aircraft was already very dangerous.

But if the green dot speed can be perfectly maintained, it is still possible to fall on the runway, but the headwind in the high-altitude environment has a very bad negative effect.

The plane seems to be unable to fly to the airport!

The most critical data for dual-engine flameout is height. Once the height is not enough, Immortal Ren Daluo will not be able to play well.

Behind Xu Cang, Jin Fuli suddenly realized a problem after noticing Xu Cang's dignified profile. He seemed to have forgotten to remove the high-altitude wind just now.In other words, he didn't intend to set up a high-altitude headwind for Xu Cang.

Reasonably speaking, Xu Cang has done a good enough job, but even if it seems that the height is not enough, isn't this project a dead end?There is no need to practice this kind of game that is destined to end!
Jin Fuli looked at his watch, and there was not enough time to do it again, so he couldn't help feeling a little regretful.It's a pity that my own inadvertent mistake messed up the project.However, the information he wanted was already in his pocket.

"What's the matter, the plane can't land?" Although it was his own mistake, Jin Fuli would not admit it.

At this moment, the student in the right seat also discovered the impact of the headwind on the plane, and looked back at Jin Fuli with some uncertainty: "Team Jin, this wind"

The two Airbus trainees standing behind also noticed that the height might not be enough, and the trainee of the seventh-level co-pilot had even worse eyesight, regretting endlessly: "It's a pity, it's just short of the headwind, there's nothing we can do."

"Oh, since there is no other way, let's forget it. The height of the flameout of the two engines is not enough." Jin Fuli laughed, and went down the donkey on the slope, which was very natural: "It's almost time, pack up and go, and deal with it later. It's okay."

However, just when everyone was about to pack their things, Xu Cang's indifferent voice sounded into everyone's ears: "Who said there is no other way?"

The student on the right seat who was about to pull out the earphones hung his hands in the air, and looked at Xu Cang in surprise. Seeing that Xu Cang didn't look like he was going to leave at all, he couldn't help but feel puzzled, and turned his head to look at Jin Fuli instead.

Jin Fuli himself had a problem when setting up the simulator. He only remembered to set the ground wind to calm, but he ignored canceling the high-altitude wind.How can I fly at a height that is not rich?
Therefore, Jin Fuli's seemingly arbitrarily incapable conclusion is not unreasonable.

Jin Fuli was just packing up the documents and materials. Hearing what Xu Cang said, he put down the documents and said earnestly: "No, I said Xu Cang, you should be able to see that the height is not enough."

"No!" Xu Cang said softly, "There is still a chance!"

That voice was like the cry of a warbler in the empty valley, soft and weak, just like Xu Cang's undecided heart at the moment.Complicated and complicated data kept pounding in Xu Cang's mind. Even Xu Cang, who was as talented as Xu Cang, felt that the world was spinning, and it was difficult to find the source of the solution.

It's too messy, too messy!
Xu Cang's eyes kept shaking, as if he couldn't settle down, he just wanted to find a glimmer of life in Ruhai's data.

Jin Fuli frowned: "Xu Cang, what are you talking about? I don't believe you can't see such an obvious thing."

"But you overlooked one thing." Xu Cang's forehead leaked a trace of cold sweat, for a long time, he didn't expend a lot of effort.

Seeing that Xu Cang seemed to be unable to hold on at any time, Jin Fuli felt a little dignified in his heart: "Is there anything else I didn't expect?"

"Wind, it's wind!"

Suddenly, Xu Cang's eyeballs finally stopped moving, everything became clear at this moment, and he finally found the final solution to the messy data.

"Wind?" Jin Fuli looked at the Airbus students around him rather blankly, a little puzzled: "Didn't I just talk about wind? Do you understand?"

The Airbus trainees next to him all shook their heads. Their thoughts were exactly the same as Jin Fuli's. Didn't they just conclude that the plane could not fly to this field because of the headwind?

Could it be that this kid didn't hear it just now?It shouldn't be so close, no matter what, you should hear it.

Suddenly, Xu Cang's eyes burst into incomparable light, and he burst out laughing: "But...but the wind can change, don't you guys know?"

Jin Fuli is such an experienced person, from Xu Cang's seemingly endless words, he instantly understood what Xu Cang meant.However, understanding is one thing, or the more you understand, the more you feel that Xu Cang is delusional.

Jin Fuli, who was silent and did not refute, attracted the surprise of the Airbus students next to him. Could it be that Xu Cang was not aimless, but this is totally unreasonable!

"No!" The seventh-level co-pilot was half a captain after all, with extraordinary knowledge, and he was beginning to have a taste.After a while, his eyes burst into flames: "That's right! This is not a real flight, it's a simulator. The change of the wind is uniform, so it can be calculated! No, no, no."

The seventh-level co-pilot kept shaking his head: "Impossible, even if the wind speed of the simulator varies evenly, how can we calculate the trajectory of the descent by manpower? This is impossible."

If he was on a real flight at this moment, then Xu Cang would be helpless.In a real environment, the wind direction and wind speed are uncertain. Although they follow approximate rules, such nonlinear changes cannot be calculated.

But the simulator is a simulator after all, it cannot simulate the irregular wind direction and wind speed from high altitude to the ground under the real flight, at least not on this simulator.

On this simulator, the wind direction from high altitude to the surface is fixed, while the wind speed decreases uniformly with height until it reaches zero at the ground.Such a uniform and regular change in wind speed gave Xu Cang a slight possibility of calculation!
However, this is only theoretical. In the view of the seventh-level co-pilot, theory often represents fantasy.A mirage, visible but untouchable.

The other two Airbus trainees didn't understand the situation at all because of their low technical level, while Jin Fuli said in a low voice: "Xu Cang, I don't like this kind of behavior that relies on guesswork to make decisions. This plane can't land. It's not your reason, you don't need to be brave."

Obviously, like the seventh-level co-pilot, Jin Fuli also felt that it was impossible for Xu Cang to calculate an accurate trajectory of the descent by manpower, even if the change of wind speed was uniform.

The only explanation is that Xu Cang relied on guessing!Jin Fuli didn't like this very much.

"Xu Cang, have you forgotten that if the flaps and landing gear are lowered in the later stage, the altitude will drop faster!" Jin Fuli said coldly.

In the manual, the recommended landing configuration with twin engines out is flap profile 3.However, with the flaps 3 and the landing gear lowered, under no wind conditions, the aircraft will lose 1.2 feet of altitude for every [-] nautical miles it advances, which is close to twice the altitude loss velocity at the green dot speed. doubled.

Xu Cang took a deep breath, and felt that the world was open-minded and his thoughts were clear. Everything that was chaotic and unrecognizable seemed so clear. He had already seen all the future trajectory of the plane.

"What if we land in a smooth configuration?" Xu Cang suddenly asked softly.

Jin Fuli was stunned, and immediately refuted: "Are you kidding me? Landing in a smooth configuration, the landing speed must be high, and the length of the Jianchuan runway is not enough."

"Enough!" Xu Cang laughed: "Just touch down at the end of the runway instead of other areas."

"Not to mention whether you can fly to this field, even if you can fly, the end of the runway is not just what you say you can land. You have no power now, how can you guarantee that you will definitely land on the end of the runway?" At this time, Even the seventh-level co-pilot couldn't help but question it.

However, Xu Cang pointed down along the set of the simulator, and in almost unobstructed weather, he just pointed to the Jianchuan runway not far away: "Did you see that runway entrance sign? I will land there, not at all More, no less!"

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(End of this chapter)