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Chapter 75 The God of Mental Arithmetic(1/2)

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The student on the right seat opened his mouth when he heard this, while the Airbus student standing behind him looked at Jin Fuli with disdain.

Is it still possible to do this, with a Boeing pilot flying an Airbus simulator?

"It doesn't matter! I said, as long as you can bring the plane down, I don't care what method you use or who flies it." Jin Fuli leaned back on his seat: "Xu Cang, please think about it, this plane is not good.

fall."

There was no expression of anxiety or hesitation on Xu Cang's face, and his eyes were calm: "There are still twenty nautical miles away from the site, and the height is more than 20,000 feet, which is just right!"

It just so happened that when these three extremely ordinary words came out of Xu Cang's mouth, I heard the feeling of being as immovable as a mountain, as if this project that was extremely difficult in the eyes of others was just an easy task, and it could be done soon at an altitude of 20,000 feet.

The final conclusion was reached.

Jin Fuli narrowed his eyes: "Then you need to be able to fly at the green dot speed all the time. How can you fly without reference?"

The green dot speed allows an aircraft that loses power to fly with the best glide ratio. If calculated based on the best glide ratio, it is indeed possible to fly to this field at an altitude of more than 20 nautical miles and more than 20,000 feet. But this is a

The ideal state is difficult to achieve most of the time, and naturally it cannot achieve the effect of flying at an altitude of more than 20,000 feet and flying 20 nautical miles.

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

At this time, the altitude margin of the aircraft is very small. If there is a slight deviation, the aircraft will not be able to fly to the field. Moreover, Xu Cang also needs to consider that after establishing the landing configuration, the aircraft's altitude to pitch ratio will change unexpectedly.

There is a big difference from the smooth state.

Generally speaking, a gliding landing with both engines turned off is a great test of the crew's computing power. It is quite difficult with the help of computers and manuals, let alone without these additional help.

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

The Airbus students in the back took a deep breath. This Boeing boy was so arrogant. The green dot speed table was not just one or two lines, but a 4×11 table. If there was even one data misremembered,

It's gone, and the plane can't even land.

But when Xu Cang's expression fell into the eyes of the co-pilot on the right seat, he didn't look like a stubborn duck at all. Everything seemed to be logical and relaxed.

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

Compared to 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 pass today, although his performance makes me feel sick."

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

Xu Cang didn't say anything else. There was already enough wasting time, there was no need to waste more time.

Now that ECAM ENG DUAL FAILURE is not available, we can only complete the corresponding disposal items based on memory. But most pilots cannot remember this, so without ECAM and without the quick checklist, they will be dumbfounded.

But Xu Cang is different, he is never the same as others!

"Let me tell you, you can do it, okay?" Xu Cang didn't dare to have high expectations for the student on the right. If he couldn't even listen and do things, then Xu Cang would have to consider being alone.

The disposal was completed, even for him it only increased a little more difficulty.

But under the pressure of a lot of mental arithmetic that will soon come to us, it would be good to have others to help share the burden.

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 commander 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

Silence began.

Xu Cang didn't respond after waiting for a second or two. He had already lost the last of his patience. He suddenly shouted: "Answer me!"

The sound was so loud that it almost overturned the entire simulated cabin, making the ears of everyone in the cabin buzz. It was really like the sound of the sky shaking, and it was heart-shaking.

Even people like Jin Fuli felt agitated and found it difficult to control themselves.

"What a great momentum!" Jin Fuli never thought that there was any bullshit statement about showing off one's domineering power. He just felt that everyone has one pair of eyes and two hands, so what's the difference?

But seeing Xu Cang today with my own eyes, I really sighed, people are indeed different.

The student in the right seat who was already panicking was so shocked by Xu Cang's yelling that 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 on the right who was obviously confused might have been encouraged by Xu Cang to calm down, swallowed a mouthful of saliva, and said with force: "I can do it!"

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

The power of the emergency power source comes from the emergency engine. Similar to Boeing, the power of the Airbus 320 mainly comes from the generators driven by the two engines. However, unlike the Boeing 737, the Airbus 320 also has an emergency engine, and its hydraulic power comes from

Ram air turbines, small fans that protrude from the belly of the aircraft, automatically extend in the event of severe hydraulic and electrical failures.

Under normal circumstances, the emergency power supply will automatically connect, but there is no guarantee that a problem will occur and it needs to be verified. This emergency power supply will provide the minimum power to the aircraft, which is quite necessary.

The student in the right seat quickly confirmed that the emergency power supply had been turned on, otherwise all the instruments in the cockpit would have gone dark.

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

After that, Xu Cang gave the order again: "Close FAC1 and then open it!"

FAC is the Flight Stabilization Computer. This is a very important piece of equipment. There are two sets in total, namely FAC1 and FAC2. Under normal circumstances, FAC1 is the main use and FAC2 is the backup. Only one Flight Stabilization Computer can still be used during flight.

, then normal operation can basically be maintained with little impact. But if both parts fail, the impact will be relatively large, at least on the aircraft yaw, envelope, low energy warning and wind shear prediction functions.

Extremely adverse impact.

In addition, the laws of flight operation will also be degraded. Specifically, the pitch changes from the normal law to the backup protected law, and the roll and yaw are degraded to direct laws. The aircraft's protection for each characteristic speed is missing, and the pilot cannot control the aircraft at all.

If you are careful, it is easy to exceed the speed limit, which is quite dangerous.

Therefore, Xu Cang must restore the operation of even one flight stabilization computer.

The student in the right seat was quite useful at this time. He followed Xu Cang's instructions and turned off and then on a flight stabilization computer. Xu Cang was always paying attention to the status of the aircraft, but he could also devote his energy to monitoring the student's movements.

Prevent him from making mistakes.

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

At this moment, Xu Cang had already adjusted the speed of the aircraft to close to 280 knots within the optimal pitch attitude range. This is a very suitable speed for restarting the aircraft, except for the engine failure when operating with high thrust.

For the problem of failure, at this time, the speed should be greater than 280 knots to prevent the engine core from locking up.

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

In Jin Fuli's settings, the aircraft did not stall for a long time, and the aircraft was not in a heavy rain environment. There should be no need to restart repeatedly. If it cannot be started once, it is likely that trying again will be in vain.

Moreover, the most important thing is that 280 knots is not an optimal gliding speed. This means that, flying the same horizontal distance, the aircraft loses more altitude at 280 knots than at the optimal gliding speed.

many.

Xu Cang's height margin was originally very small, which greatly limited his room for trial and error. If he could now have an altitude of more than 30,000 feet, he would be able to try it two or three times.

But the reality is that he only has one chance to restart!

Generally speaking, it takes thirty seconds to wait for the engine to ignite before you can see the result, but Xu Cang will not wait like this and directly asks the student in 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 still

Relatively large. If the altitude of the aircraft is too high, sometimes the APU cannot start.

As Xu Cang expected, the engine did not respond at all after trying to restart. Although this attempt can be made without any auxiliary conditions without any restrictions, and waiting for the APU bleed air to become available will also help the engine start, but Xu Cang

Cang is not going to try it anymore.

At a speed of 280 knots, the altitude lost faster than he expected. Theoretically, under windless conditions and at a speed of 280 knots, the aircraft would lose a thousand altitudes every 2.2 nautical miles it flew.

feet. However, at the green dot speed, the plane will fly 2.5 nautical miles before it drops a thousand feet. The gap of 0.3 nautical miles is still a world of difference in life and death, especially when Xu Cang noticed that the plane was still at a weak

This is one of the reasons why the aircraft loses more altitude under the headwind.

He had no chance to try again, so he really planned to complete the landing with both engines stalled.

"The engine main switch is turned off for thirty seconds, then turned on!"

Under Xu Cang's command, the nervousness of the student in the right seat began to gradually ease, and his movements became faster. However, in the eyes of the Airbus students behind him, these scenes were truly bizarre.

A Boeing pilot directed an Airbus pilot to deal with a malfunction in the Airbus simulator. There was no sense of disobedience in the scene, as if Xu Cang was the Airbus captain, calm and calm.

If anyone dares to describe such a scene to them without seeing it with their own eyes, they will 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 Level 7 co-pilot. He has just passed the bureau inspection and entered the left-seat flying stage. At this time, the co-pilot’s theoretical level is considered to be the best. Ask him if he is right.

.

The chest of the student named Brother Wang kept rising and falling. Regardless of whether Xu Cang had done anything wrong, his calm demeanor alone was fascinating.

The eyes of Jin Fuli next to him are getting brighter and brighter. This is no longer a rough jade that has not yet been carved, but is clearly a peerless jade that is ready to shine.

Those blind people in the Boeing fleet are indeed rubbish. They don’t even want such people. Blindness is not enough to describe them.

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

After the APU is available and the aircraft descends below 20,000 feet, verify the wing anti-ice switch, open the APU bleed air, and close and open the engine main switches again one at a time.

At the same time, Xu Cang began to slow down the aircraft. He had confirmed that the engine would no longer be started, so he would adjust the aircraft's speed back to the green dot speed.

At this moment, the weight of the aircraft is 13,000 pounds, which is about 60 tons. The height is less than 20,000 feet, so the speed should be about 200 knots. Xu Cang quickly moved the stick slightly to gradually slow down the aircraft.

Two hundred knots, and then maintain this speed.

As mentioned before, under windless conditions, with the same loss of one thousand feet, the speed of 200 knots can fly 2.5 nautical miles, but the speed of 280 knots can only fly 2.2 nautical miles. The difference is quite obvious.

At a speed of two hundred knots, the average aircraft descent rate is approximately 1,600 feet per minute.

Seeing Xu Cang maintaining a speed of two hundred knots, Jin Fuli pushed the Airbus student next to him: "Is this the green dot speed?"

Even if Jin Fuli has been flying Airbus for so many years, he would never remember this. The Airbus student has already checked it out: "Team Jin, it's two hundred knots, he really knows."
To be continued...
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