Return to 2000: Captain of the Great Powers

Chapter 332 Landing!A rare and strange stall in the world!
Richard's ability is still quite strong. After experiencing the initial panic, he finally stabilized the plane.As the height decreases, the air volume tends to decrease and stabilize, and the difficulty of manipulation becomes smaller and smaller.

For the landing under the super large headwind, the difficulty is that there cannot be a long-term large angle, because the headwind volume is too large, as long as there is a significant angle, the airflow will hit the fuselage, resulting in a larger angle.However, this included angle will not last too long. When the included angle reaches a critical value, the yaw stability of the aircraft will take effect.

The upwind airflow would impinge on the deflected vertical tail, forcing the aircraft back onto a trajectory parallel to the airflow.

However, because the approach speed is too high, there is actually very little time for Richard to make corrections, and the runway is heavily snowed, and the braking effect is extremely poor. It is better to straighten the plane in the air, rather than wait until it touches down to make corrections cross.

It can only be said that the chairman of the International Federal Airline Pilots Association does have two brushes. After a little adaptation, he seems to have found the trick, and has been stabilizing the aircraft to a height of about [-] feet.

At this height, the entire Manor Airport can be clearly seen.It's just that the snowfall was too heavy, except for the approach light column that can guide to the center line of the runway, the rest of the place, including where is the runway, where is the taxiway, and where is the road surface, all know nothing. reference.

"The ground speed is 210 knots, the surface speed is [-] knots, and the altitude is [-] feet!" Richard became more and more confident, and even reported some important flight data to Xu Cang on the eve of landing.

Suddenly, a beam of green light lit up on the top of the tower standing near the airport, and Richard immediately understood: "The tower has given the light signal, and it is time to land."

"After landing, turn off the car with both engines, push the lever to the maximum, use the maximum automatic brake, do not use manual brake." Xu Cang reminded.

At this time, Xu Cang felt that his sight had recovered a bit, at least the surrounding black vision area had obviously subsided a lot, this was the result of the blood supply to the brain and the reactivation of the optic nerve.However, it will take some time until he fully recovers his eyesight, and it must be after he lands.

"Don't push back?" Richard didn't move his eyes, but he still couldn't help asking in doubt.

"No! You are controlling very well. The aircraft is very low speed. Even if reverse thrust is used, the effect will be mediocre. Moreover, if reverse thrust is used, the snow on the road will cause more damage to the engine, so simply shut down the car directly. More than 60 knots Ground speed, a runway of 600 meters is enough."

The muscles on Richard's face twitched a few times. Unexpectedly, at this time, Xu Cang was still concerned about the two engines.

Indeed, when the thrust reverser is turned on, the air grille of the engine intake opens, causing the airflow direction to be reversed.If a large amount of snow water is inhaled here, whether it is the snow water itself or other substances mixed in it, it is more likely to pollute the entire engine.

The effect of reverse thrust is at high speed, but the effect of reverse thrust at low speed is actually very general.

Instead of taking the risk of scrapping the two engines to seek a reverse thruster with limited effect, it is better to directly shut down the engine and protect the engine, which is more cost-effective.

Being able to say such things shows that Xu Cang is already more confident in the matter of landing.

Richard didn't get too entangled in this kind of thing. The effect of reverse thrust is indeed very poor at such a low ground speed. What Xu Cang said is very reasonable. After all, the two PW6000 engines cost tens of millions of dollars. It is better to keep nature.

"If there is an accident, I will try to deflect out."

Before landing, Richard reminded Xu Cang one last time.What he originally meant was that if an accident happened and the plane could not stop on the runway, he would try to deflect the plane. At that time, he would not care whether the plane rushed to the taxiway or the apron.

You must know that the end of the runway is facing an extremely steep downhill slope. If you rush down, there is definitely no possibility of surviving.

But before Richard's words came out, he suddenly felt the nose of the plane drop.

This nose-down is very strange, because in the ultra-low-altitude environment, the headwind suffered by the aircraft has been relatively stable, and there is no ejector rod, how could the nose fall down?
Moreover, this nose-down does not seem to be caused by airflow or control, as if the aircraft suddenly loses strength.

If an ordinary pilot encounters this situation, if the nose of the aircraft falls, then the lever should be brought, which is a normal operation.

But Richard was different. His vision and skills surpassed [-]% of the pilots in the world, and he belonged to the top group. He immediately noticed that there was something abnormal in the nose-down situation. For example, in the case of airflow and manipulation effects, it is more inclined to another situation.

"Stalled?"

Richard first thought of this factor, but the aircraft's stick shake warning did not sound.

However, there is a situation where the stick shake warning does not sound but the speed is stalled, and that is severe icing.

If severe ice builds up on the wing of an aircraft, it will change the surface structure of the wing to some extent, thus directly affecting the flow of air on the surface of the wing.

The aerodynamic layout of an aircraft is an extremely sophisticated technical project. How the air flows, at what speed, and what effect it produces are all determined in various tests before commercial use.Once the wings are heavily icy, it will undoubtedly break the original aerodynamic layout, thereby affecting the generation of aircraft lift.

It is for this reason that icing of aircraft is very taboo.

The aircraft's angle of attack detector can detect the data of the aircraft's angle of attack. However, the reason for the stall due to excessive angle of attack is that the airflow flowing through the surface of the wing will be separated when the angle of attack is too large. Therefore, once the angle of attack detector detects the aircraft's If the angle of attack is too high, a stick shake warning will be issued.

But if it is icing, the angle of attack of the aircraft itself does not increase, but the stall caused by the direct change of the aerodynamic layout of the wings due to icing.In this case, the angle of attack sensor cannot detect it, and the natural stick shake warning is out of the question.

Moreover, when they were on the ground, Richard and Xu Cang were extremely worried about the problem of ice accumulation on the plane.The wind and snow here are too violent, and the temperature is too low, so the anti-icing fluid may not be effective.Not long ago, the plane was only slightly close to the cyclone, and several flight data probes were blocked due to icing. Although the backside melted smoothly due to the heat generated by the plane's dive and friction, it can also be seen how serious the ice accumulation inside the cyclone is.

From this point of view, it is very likely that the wings of the aircraft were icy, producing a stall-like effect.

"The wings are icy, and the stall has occurred!" Richard felt more and more afraid. If he had held the stick like an ordinary pilot just now, it would undoubtedly deepen the stall, and he would not be able to change it back then.

Without even thinking about it, Richard pushed up the pole directly, and the speed of the plane began to increase instantly.Usually in such a situation, it is necessary to add some throttle, but Richard was afraid that adding the throttle would cause a large increase in the speed of the aircraft, so he did not use the throttle.

Considering that the nose-down trend was not too obvious just now, Richard felt that even the stall should only be shallow, and it should be able to correct it by pushing down the stick a little.

Now there are only two hundred feet left in the altitude. The altitude margin is definitely not enough, but it is barely enough for him to recover and land.

Xu Cang heard Richard's words before the push, and he could vaguely see the situation outside at this time, but he didn't take over the control, because he didn't feel that there was anything wrong with what Richard did at that time. .

At an altitude of [-] feet, for pilots of his level and Richard's level, it is completely possible to recover and land, especially since the stall does not seem to be too serious.

However, as the action of Richard's jacking deepened, Richard suddenly felt something was wrong.Generally speaking, due to the stall of the wings, the lift of the aircraft is reduced and the nose of the aircraft is pitched down. This is a normal logical chain.However, with the action of the rams generated, the stall should be suppressed and the aircraft's rudder effect should be restored.But in fact, why did he feel that the plane was falling faster and faster, and it was still in that limp state?
It's not that Richard pushes the bar, the speed of the plane's descent should be getting faster and faster.

The thrust of the aircraft was sufficient, and Richard maintained a relatively stable attitude after ejecting the bar.In this case, the falling speed of the plane will increase, but it should only appear when Richard pushes the lever. When the attitude of the plane stabilizes, the falling speed of the plane should also stabilize.

However, the fact is that even though Richard maintains a relatively constant attitude, the falling speed of the plane is still accelerating, which is actually rather strange.

In fact, a better explanation for this situation is that the operation of Richard's ejector does not actually eliminate the influence of the stall.

The plane was still in a stall.

"Not enough reform?"

Richard first thought of this possibility, but he had already ejected the pole. If it still can't be corrected, isn't the plane in a deep stall?
But judging from the somatosensory and previous tendency of the nose drooping visually, the plane should not be in a state of deep stall, right?
If the plane was in a deep stall at that time, they can basically close their eyes and wait for death now.

However, even if he didn't understand it in his heart, Richard couldn't believe it when the facts were in front of him.The state of the aircraft now looks like it is falling down due to the loss of lift in a stall state.

So, Richard began to increase the amount of ejector rod again, hoping to recover the aircraft from the stall first, and then perform a flared landing.

However, in this case, the height space, which was not so abundant, became tense all of a sudden.

The speed of the aircraft is inherently large, and the resulting standard descent rate will also be large.Richard made another push, and the plane's descent rate exceeded [-] feet for a short time, and it was almost touching the ground.

However, at this time, Richard was a little bit stuck, and even said that he fell into the pipeline effect.All he could think about was the stall, and he thought he could level the plane at the last moment, but in fact, the plane's condition was already in jeopardy.

In fact, Xu Cang also had some signs of this.

Both of them felt that they would recover from the stall first and then touch down.

However, Xu Cang suddenly remembered the stick shaking warning he had encountered when he dived.At that time, Xu Cang also recovered from the push rod, but in the end the stick shaking warning did not disappear, and the speed at that time was much higher than now.

Although there was no stick shake warning this time, judging from the sinking of the aircraft and the drooping of the nose, the aircraft is undoubtedly in a stall, and the stall situation is still getting worse, at least there is no recovery.

Both cases, treated in the same way, yield nearly the same results.

There is absolutely no wrong way to recover from a stall, otherwise, the stall ejector would not be something engraved in the genetic instinct of the pilot.So, what's the problem when the ejector rod can't get out of the stall?

If there is no problem with the recovery method, then there is something wrong with the stall itself!
Suddenly, Xu Cang thought of an extremely rare possibility.

"Damn!"

Xu Cang didn't care whether he could see clearly at this moment, so he yelled, "Give it up!"

After finishing speaking, Xu Cang directly brought the pole back a lot.

Richard was a conditioned reflex, and Xu Cang instinctively let go of the sidestick with his right hand as soon as he gave an order.But when he noticed that Xu Cang started to take the lever, his face changed drastically: "Xu Cang, the plane like you is going to lose lift and hit the runway."

As we all know, taking the lever during a stall is a reverse operation, which will only aggravate the stall.

Once the stall is too serious, the lift force is lost, and the aircraft of dozens of tons falls down, shouldn't it be smashed to pieces?
However, what Richard didn't expect was that Xu Cang cut off the throttle abruptly, but didn't stop it. However, with the lever on, the plane crazily reduced the sinking naturally, just like a very normal operation.

Take the stick, then the plane looks up and the sinking decreases.

That's right, it's that simple, it's that direct.

"This" Richard is stupid, if according to his expectation, the plane should have lost all lift at this moment, and then smashed hard on the runway, smashed to pieces.

However, the fact is that the airplane did not enter a deep stall, and even recovered quickly from a stall.Not only has it been changed, but Xu Cang's movement with the pole is extremely rough and violent. On the eve of landing, the sinking and the original increased speed have been greatly reduced.

"No, no, why is this, how did this happen?" Richard felt deeply doubted about his own technology for a moment: "Did the plane not stall?"

However, if the aircraft does not stall, what does the drooping of the nose before and the faster and faster sinking rate mean? Isn't this a typical stall performance?

But if the plane stalled, why did the plane stop sinking when Xu Cang moved the lever, it was exactly the same as if there was no stall.

However, before Richard figured it out, the altitude of the plane was already very low. Even though Xu Cang slammed the lever, it didn't completely prevent the plane from sinking.In just three or four seconds, the plane landed heavily on the runway.

As soon as the plane landed, Xu Cang yelled, "Richard, hand over to the controls!"

(End of this chapter)