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date="2021-10-04"

title="chapter Ten"

weight="139424"

series = ["UAAG Air Crash Investigation Team"]

mode = "manual"

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The engine used by McFly F435 is the Trent 810 produced by Rolls-Royce.

In the 1990s, several major aircraft manufacturers, such as Boeing, McAir, and Airbus, launched their own ultra-large long-range passenger aircraft in a few years to compete in the market. As an engine supplier, Rolls-Royce did not give much credit. Through technological reforms, it developed a new type of engine: Trent 810.

At the time, Trent 810 meant the top engine technology.

It consists of a three-rotor layout and is equipped with the most advanced high-pressure system modules, which allows the aircraft to obtain greater thrust while being short and light, saving flight costs, so it is very popular.

To this day, the Trent 810 is still one of the best-selling aircraft engines.

Zhuo Huan: "In order to save costs and reduce the weight of the engine, Rolls-Royce has reduced the burden on every detail of the engine, including its MCD magnetic chip detector." He seems to have written a Rolls-Royce engine as In the book, every word is printed in the mind, and there is no need to read the manuscript. I blurt out this complicated and huge knowledge. "Normal magnetic chip detectors use conventional physical means, that is, magnetic metal."

Taking a black oil-based pen from the table casually, he drew a schematic diagram on the whiteboard.

"When the lubricating oil passes through the MCD magnetic debris detector from the oil tank, through the oil return path, the magnetic debris in the lubricating oil will be attracted by this piece of magnetic metal. Metal magnetic debris residue.” Zhuo Huan said, “In order to achieve this, a normal engine needs to use one main magnetic plug and seven secondary magnetic plugs, so as to ensure that the magnetic debris in the lubricating oil is filtered. But Trent reaches 810 magnetic plugs. nothing."

The vast majority of people present were professional aircraft accident investigators, but before consulting the information, no one dared to say that they knew the design of the Trent 810 engine.

Only Reid·Irvin·Patrick can do this.

Old Joseph asked: "Without a magnetic block, what kind of magnetic device does the Trent 810 use?"

Zhuo Huan looked at him: "Electromagnetic induction."

There was an uproar.

Zhuo Huan wrote the formula on the whiteboard: "Through precise calculations, when the current passes through the MCD magnetic debris detector, a strong magnetic field is generated due to electromagnetic effects. This magnetic field is directly used to absorb magnetic debris floating in the lubricating oil. This The move made the Trent 810 engine not need to be loaded with any magnetic plug, directly saving 6kg of weight cost."

After a pause, he announced in a flat but solemn voice: "This is a genius design."

Instead of using magnets, electricity is used directly to generate a magnetic field through electromagnetic induction to absorb magnetic debris floating in the tubing.

This is the realm of God, a design that genius can come up with.

After hearing these words, old Joseph's face showed hesitation. He seems to realize something, but he hasn't said it for a long time. Among all the people present, there were also people who came up with an almost impossible answer, but none of them dared to say it.

Finally, someone couldn't help but speak: "The original design of Trent 810 was to use electricity to create a magnetic field. Do you want to say that this device has actually failed the power system?"

is it possible?

After many years of design, Rolls-Royce has spent thousands of people's efforts. They must have done countless experimental tests on the MCD magnetic chip detector. Twenty years have passed, and no accident has happened.

How could something happen suddenly now?

and……

Old Joseph looked at Zhuo Huan seriously: "What changed this magnetic field and caused the power failure?"

Everything has been calculated by the scientists, and there will be no mistakes.

Thousands of designers have worked hard in this MCD magnetic chip detector, and they have carefully calculated every step.

Just like the code written in the computer, the machine is only responsible for computing the code and will never rewrite the code. Then there must be a mysterious external cause that has tampered with this line of safe code.

Fucheng's brain started to work quickly, and he thought about every sentence and every word of Zhuo Huan.

All the investigators present were also thinking wildly. They discussed in a low voice, wanting to find answers from the collision of inspiration.

In the end, they raised their heads and looked at the man standing in front of the whiteboard, wanting to hear the answer from him.

But this time, Zhuo Huan put the oil-based pen back on the table.

He looked down at the small MCD swarf detector on the table: "Unfortunately, I don’t know. But what we have to do now is to demonstrate-under the action of an external magnetic field, the magnetic field of the MCD swarf detector Will it change; if it does, will this change be counterproductive and affect the aircraft’s electrical system."

"Everyone—"

"This is our next task."

People from Rolls-Royce arrived at the investigation headquarters in the afternoon.

The name Rolls Royce is not unfamiliar. As we all know, it is one of the top luxury cars in the world.

In fact, it is indeed the Rolls Royce.

Rolls-Royce is divided into two parts, one part produces Rolls-Royce cars, and the other produces aircraft engines. In order to facilitate the distinction, the latter is also called Rolls-Royce engines.

Researchers from Rolls-Royce engines came to the investigation headquarters to assist UAAG in troubleshooting the engine.

After the other party arrived, he said directly: "Science is always moving forward with difficulty after repeated mistakes. Failure is the only way to success. Rolls-Royce is very willing to cooperate with the investigation, but we do not think it is. Engine failure."

"The MCD magnetic chip detector of Trent 810 has been tested 3176 times in our laboratory and has never failed."

"The magnetic field of the magnetic chip detector is provided by the power system. If its magnetic field changes, the power system must have changed first. This is a chicken and egg problem. If the power system does not go wrong, the magnetic field will not Error. So in the final analysis, it will not be a problem with the engine itself."

Zhuo Huan: "Where is the designer of this MCD magnetic chip detector now?"

The researcher sent by Rolls-Royce was choked with a word. He didn't expect that he said so much, the other party ignored him at all. But thinking about who the person in front of him is, he can only forgive this person's arrogance.

"Because of limited personal ability, Rolls-Royce dismissed the designer twelve years ago."

Zhuo Huan gave a "tsk", he turned his head to talk, and found that it was Lina standing beside him.

With frowning eyebrows, Zhuo Huan shouted to Fucheng, who was holding a JAL JL917 flight chart for research. After he arrived, he asked Lina to tell him what happened here, and then said to Fucheng: " You see, I said, geniuses are always lonely."

Unknown Rolls-Royce personnel: "...?"

Fucheng: "..."

Rolls-Royce researchers firmly believe that it is definitely not the problem with their engine.

The engine's magnetic field is all provided by the aircraft's electric system. If the electric system does not make a mistake, the engine's magnetic field cannot go wrong.

However, Zhuo Huan did not give them a chance to defend.

Everyone put a new Trent 810 MCD magnetic chip detector into the laboratory, and applied a special magnetic field to it from the outside, constantly changing the direction and intensity of the magnetic field. After only 37 experiments, a conclusion was reached.

Old Joseph smiled and said: "Obviously, when the magnetic field of the MCD magnetic debris detector is externally affected, as long as the magnetic field is greater than 156 Gauss and the direction angle is greater than 18.6 degrees, the original magnetic field of the magnetic debris detector will be changed; If it is greater than 865 Gauss, it will adversely affect the electrical system, overload the aircraft electrical system, and cause a short-term downtime, that is, a crash."

The Rolls-Royce researcher's face changed, but he soon calmed down and asked with a smile: "Where can the external magnetic field of 865 Gauss be obtained?"

The smile on old Joseph's face gradually disappeared.

The magnetic field of 865 gauss is almost negligible in the laboratory, and the magnetic field strength of a permanent magnet is 1000 gauss.

But on an airplane, without any external force, where can we find such a magnetic field?

Old Joseph couldn't help turning his head and looked at Zhuo Huan.

Under the clear moonlight, the man glanced at them indifferently, took off his white lab coat, and placed it on the back of the chair. He didn't speak, but turned and pressed the button of the glass door of the laboratory, and strode out.

Through the window, a little spark lit up in the silent night.

Leaving the laboratory, Zhuo Huan and Old Joseph returned to the investigation headquarters.

Everyone looked at them expectantly, waiting for them to give the final results of the experiment.

Old Joseph smiled bitterly and said: "Indeed, the external magnetic field can change the electromagnetic field of the MCD magnetic chip detector. After reaching 865 Gauss, it will affect the power system and cause downtime. But where can I find this external magnetic field?"

Everyone showed disappointed expressions.

After Zhuo Huan returned to the investigation headquarters, he searched for related papers in front of the computer.

He wrote unhappy on his left cheek, and irritable on his right. Four words are printed on the top of the head

Keep away from strangers.

The terrifying depression was unstoppable, and the army was mighty and smashed down, oppressing the entire investigation headquarters so that no one dared to speak out.

Su Fei was hiding behind the computer quietly looking at the big demon king, and suddenly a figure flashed in his peripheral light.

Su Fei raised his head: "Hey, don't go, don't ignore him! Come back!"

The light was blocked by the person's figure, and Zhuo Huan slowly raised his head and saw the person coming.

Zhuo Huan: "Huh?"

Fucheng put a piece of information in front of his eyes: "On December 19, 2019, JAL JL917 took off from Tokyo and flew to Helsinki, Finland. On the night of the flight to the Arctic Circle, the Arctic Circle erupted in a 38-year-old aurora frenzy. According to sighting records, the aurora exploded 73 times in the same location, which occurred within two hours."

With his lips slightly opened, Zhuo Huan looked at the black-haired young man in front of him, and suddenly couldn't say a word.

Fucheng: "I read the interview reports of 89 survivors on the plane, 65 of whom reported that they saw aurora during the flight of the plane—"

"It was a good weather in Finland that day, but unfortunately, in the Arctic Circle, it doesn't seem to be."