Start with the aviation industry

Chapter 218 World Top Level
Zhou Yuanliang said loudly again: "Xiao Li, what are you still doing in a daze, move this paddle hub to my office."

Xiao Li looked at him, still in a daze.

He couldn't figure out how to move this propeller hub to Zhou Yuanliang's office, which was sent by Leihuo Technology Industry Group for design verification.

Zhou Yuanliang said loudly again, "Move this paddle hub to my office, move it now!"

Xiao Li finally reacted and prepared to take this part away.

Two people from Leihuo Technology Industry Group came with the car, one of them was He Wenli, chief engineer of helicopter power system design.

He asked puzzledly, "Mr. Zhou, you want to remove this paddle hub, why?"

Because it involves technical secrecy, the people of Leihuo Technology Industry Group are almost inseparable from these parts 24 hours a day.

Zhou Yuanliang smiled a little embarrassedly, "Director He, there is a series of preparatory work to be done for design verification, and formal design verification is at least tomorrow's thing. I want to take this propeller hub and study it carefully. fan."

That's what happened.

If someone else made such a request, He Wenli would definitely refuse it outright, but facing Zhou Yuanliang, he hesitated a little, and then said, "I can't decide this matter, I just need to make a phone call."

"Yes, yes, I have a phone in my office." Zhou Yuanliang said enthusiastically.

After calling for instructions, He Wenli agreed, but repeatedly told him to protect this part and deliver it early tomorrow morning.

Zhou Yuanliang assured again and again that there was no problem.

He went back happily, and behind him was Xiao Li, the chief designer, who was holding the paddle hub in one hand.

The paddle hub is made of titanium alloy and is relatively light, weighing less than ten kilograms. Xiao Li walks quickly with one hand.

Zhou Yuanliang reminded, "Be careful, don't drop it on the ground."

Only then did Xiao Li hold it with both hands, and he didn't dare to walk too fast, and became very careful along the way.

The paddle hub was finally placed on the desk in Zhou Yuanliang's office. He couldn't wait to take out a paper cutter from the drawer, and carefully removed the outer wrapping paper. Finally, the paddle hub was completely exposed in front of him. .

it's beautiful!
Like a work of art!
Like admiring a peerless treasure, he looked at it again and again, touched it fondly, and then took a caliper or an inner micrometer to measure several dimensions.

Gradually, his brows wrinkled.

He couldn't understand the design of some places.

Why is there such a structure, why is the size of this place such that this place is designed to be a little thin, is it really ok?
The more I read, the more I don't understand.

What the hell!
Zhou Yuanliang is a design expert in this area. He led the team to design and develop the propeller hub of the future medium-sized special-purpose armed helicopter, but he still couldn't understand the design of the propeller hub in front of him.

I thought in my heart, it would be great if there were design drawings.

No, if Mr. Lin is here, it would be even better if he can ask for advice in person, and some things he doesn't understand will definitely be cleared up.

After looking at it for a long time, I even drew a sketch with white paper and pencils, and marked some important dimensions.

Then, he weighed the weight of this propeller, and was surprised again, the weight was only 9.8 kg, while the weight of the propeller designed by his team was 15.4 kg.

Why is it so light!
Can such a light hub really meet the needs of that helicopter? It is a transport helicopter with a full load of more than ten tons, which is several tons heavier than that future medium-sized armed helicopter.

Even though he is an expert in this field, Zhou Yuanliang is getting more and more confused, and he is simply at a loss.

TRAIN STATION.

A train stopped at a station, and a large number of people got off the train, some of whom were obviously different, forming a sharp contrast with the passengers who got off the train.

They are Lin Feng and Fang Anping.

If it was the design verification of other parts, Lin Feng might not come in person, but the design verification of composite rotors and hubs is different.

"Boss, our stuff arrived yesterday, and we should be doing preparations for design verification now."

Needing design validation is the composite rotor and hub, which arrived at the helicopter design house yesterday.

If you have your own rotor test tower, Leihuo Technology and Industrial Group doesn't have to go through such trouble, and can do design verification by itself.

Lin Feng ordered, "Director Fang, you need to pay close attention to the laboratory and verification equipment."

Fang Anping immediately replied, "Boss, don't worry, I'm catching these things myself. Soon, we will be able to do many design verifications by ourselves."

Everyone crowded around Lin Feng, talking while walking, and walked towards the exit.

Outside the train station.

Near the exit, the head of the helicopter design institute, Director Qian, and several people were already welcoming him in person.

There are only a handful of people who can be greeted by Director Qian at the train station in person.

Today, Lin Feng is one of them.

Qian Tao looked at the direction of the station entrance, then looked at his Shanghai watch, thinking in his heart, judging from the time, Mr. Lin and the others should have gotten off the train.

Next to him was Director Qian's assistant. Seeing that his leader had been waiting here for more than half an hour, he couldn't help saying, "Leader, in fact, we can meet you at the station. You don't need to come here in person."

Qian Tao shook his head and said, "Xiao Sun, you don't understand."

Xiao Sun really didn't understand. He didn't understand why Qian Tao, who was the leader, would come all the way here and wait outside the train station for so long, just to meet Lin Feng.

What he didn't even understand was that this time, it was Leihuo Technology and Industry Group that asked for their own unit and needed their unit to help them with design verification, rather than their own unit asking for Leihuo Technology and Industry Group.

Perhaps it was because Xiao Sun was puzzled.

Qian Tao said patiently, "Xiao Sun, during the design and development process of this future special-purpose armed helicopter, Leihuo Technology Industry Group has helped us a lot, and we owe him a huge favor."

Yes, they have given great technical support.

Without the support of Leihuo Technology Industry Group, Zhou Yuanliang and the others would not have been able to successfully develop the composite rotor so quickly.

In addition, he still has a little plan in mind.

If you have a good relationship with Lin Feng, if you encounter technical problems in the design and development process of this special armed helicopter in the future, it will be convenient for you to consult and seek help from Leihuo Technology Industry Group.

"Leader, that seems to be Mr. Lin and the others."

Qian Tao hurriedly looked towards the exit, but it was Lin Feng and the others who were coming out of the exit.

He hurriedly greeted him with a smile on his face, "Boss Lin, welcome, welcome!"

The two shook hands tightly.

After exchanging some polite greetings, everyone boarded the car and headed to this helicopter design institute under the warm invitation of Director Qian.

In the afternoon, all the preparations had been done.

The rotor test tower is equipped with a composite material rotor designed and developed by Leihuo Technology Industrial Group, and the titanium alloy propeller hub is matched with the rotor for testing.

All the wires are connected and you are ready to go.

Several technicians are doing the final inspection, and there are many people around. Every time the rotor verification test is done, this unit is the most lively moment.

Quite a few people looked at the brand-new composite rotor on the test tower, which they had never seen before, and discussed it hotly one by one.

"It's a composite rotor again. I don't know what the verification results will be."

"Mr. Zhou led the technical team to successfully design and develop the composite material rotor. I don't know how big the technical gap is between the two."

"I am optimistic about Mr. Zhou's composite material rotor, which is the rotor for future special armed helicopters."

"I am optimistic about Leihuo Technology Industry Group."

"."

The entire experiment site was very lively, there were not hundreds of people watching, at least dozens of people, including some experts, even some old experts with gray hair appeared here.

They know more than ordinary technicians, and they are full of expectations for this design verification.

"Zhou Yuanliang was able to successfully design the composite material rotor. I heard that Shanglehuo Technology and Industry Group asked for advice several times."

"The composite material rotor he designed is already very good, and has basically reached the world-class technical level. I don't know what will happen to the composite material rotor of Leihuo Technology Industry Group."

"It looks like design verification will start in one or two minutes."

"."

While these experts were also talking about the composite material rotor, Qian Tao, Lin Feng and others came together, and there were many people behind them, including several senior executives of this unit.

Zhou Yuanliang is an expert in helicopter power system design, and he personally directed the composite rotor design verification.

"Report to the director, the preparations are basically complete, we are doing the final inspection, and after 10 minutes, the design verification will start."

Director Qian nodded in satisfaction.

Lin Feng said, "Old Zhou, this design verification is up to you."

Zhou Yuanliang said hastily, "Mr. Lin, you are too polite. You have helped us so much. I am honored to be able to do such a small thing for you."

10 minutes passed quickly.

The alarm bell sounded at the test site, and the onlookers stood outside the white warning line. Several staff members wearing red armbands whistled to maintain the order at the site.

The alarm goes off and the countdown begins.

After the 30-second countdown, everyone saw that the rotor on the test tower began to rotate at an increasing speed, and even standing outside the safety white line could still feel relatively strong airflow.

The speed quickly reached hundreds of revolutions, and the situation of the helicopter on the ground began to be simulated, and various data were displayed on the test instruments.

Several experimenters reported loudly.

"Vibration is normal!"

"The noise is normal!"

"Aerodynamic load is normal!"

"Lift and drag are normal!"

"."

Hearing the sound of "normal", the onlookers were slightly commotiond, and some people were even more interested in looking at the fast-rotating rotors on the top of the rotor test tower.

Lin Feng didn't have much expression on his face. This was just the beginning, and there was nothing to be happy about.

After a while, the rotor speed began to accelerate, faster and faster, and the strong airflow that everyone could feel became more obvious.

A sound of "normal" also came to everyone's ears.

Next, various action tests of the simulated helicopter began, such as hovering, inverted flight, side flight and so on.

All data are still normal.

Then, the simulated helicopter’s maximum load climb began, which is also the biggest test for the rotor and hub. At this time, the force is the largest, and the vibration and noise are also the largest.

No one spoke in the whole scene, and everyone's eyes were either looking at the working rotor on the top of the rotor test tower, or at the various instruments and meters. Some people felt a little nervous.

For example, the design experts standing next to Fang Anping put their hearts into their throats one by one, afraid of the slightest problem, He Wenli clenched his fists tightly.

Not only did he participate in the design of the composite rotor and hub, he was even the backbone of the design of the transport helicopter's power system and transmission system.

"God bless, don't make any problems, this design verification must pass smoothly"

The maximum load climbing test time is 300 seconds. In just 5 minutes, many people feel as if a century has passed.

After seeing the speed of the rotor begin to drop, many people breathed a sigh of relief quietly, thinking in their hearts, how about the data of the maximum load climb test, is there any problem?

Soon, several testers reported loudly again, and the words "normal" rang in everyone's ears.

Many people quietly let out a sigh of relief.

He Wenli even let go of his clenched fist quietly, and then said in his heart, this test has finally been passed.

Then a series of simulation experiments and verifications under different conditions were carried out, and it took more than an hour before the first verification was completed.

The composite rotor on the test tower gradually came to a stop, but the whole scene became more lively, many people were talking about it, and everyone was beaming.

"It should be passed once."

"As expected of Leihuo Technology Industrial Group, it actually passed the design verification in one go. It's amazing."

"How about verification data?"

"."

The whole scene was very lively, and the test report was quickly printed out. Zhou Yuanliang took the report and walked quickly to Lin Feng and Director Qian.

"Mr. Lin, congratulations, the design verification has passed once, and the data is perfect."

Lin Feng took the test report and flipped through it, and the people beside him, including Qian Tao and Fang Anping, gathered around one after another, staring at the test report.

Soon, exclamations sounded.

Oh my God!

The data is so amazing! ! !
The rotor lift-to-drag ratio reaches 11.5, the rotor efficiency is 0.91, the vibration is 0.036g, and the maximum noise is only 78 decibels
Qian Tao shouted excitedly, "Boss Lin, the world's top level, the top level!!!"

Lin Feng felt relieved, the product produced by the system must be a high-quality product, and it is true. He never expected that the experimental verification data would be so good. This level has indeed far surpassed the level of most composite rotor blades in the world.

As for Zhou Yuanliang, apart from envy, all he had left was deep admiration.

He led the team to successfully design and develop the composite material rotor, and he has always been very proud. However, after reading the test data of Leihuo Technology Industrial Group, he was a little bit hit, and felt that there was still a big gap with others.

For example, the lift-to-drag ratio of the rotor is 9.1, while Leihuo Technology Industry Group has broken ten, reaching 11.5.
There is a judging standard in the industry that a rotor lift-to-drag ratio of more than ten is considered world-class, and a rotor lift-to-drag ratio of 9.1 can only be regarded as quasi-first-class.

The efficiency of the composite material rotor of Leihuo Technology Industry Group is even more astonishing, reaching 0.91. The industry believes that it is world-class if it reaches 0.8 or above.

Other indicators, such as noise, vibration, compressibility effects, dynamic load distribution, etc., are excellent.

It is indeed the top level in the world!
Lin Feng was in a good mood. After flipping through the test report, he said loudly, "All the data are not bad. Take a look."

Fang Anping was the first to bring the report over, and read it with great interest.

As for Liu Tao, he smiled enviously. With such excellent data, Mr. Lin actually just said that the data is not bad.

It's too Versailles.

This test report began to circulate in the hands of several design experts, and more and more people knew the test data, and suddenly, the atmosphere of the whole scene changed.

"Great, great!"

"This is definitely the world's top level. To be honest, I am looking forward to this transport helicopter from Leihuo Technology Industry Group."

"."

The design verification of the composite rotor and hub was considered a one-time pass, and the task was completed. Lin Feng thought in his heart, should he take the train back tonight.

The distance is not far, only four or five hours by train.If there is a high-speed, it is also convenient to drive, but from here to Fenghuang City, there is no high-speed, only national and provincial roads, so it is better to take the train.

Obviously, Lin Feng had wishful thinking.

Qian Tao warmly invited, "Boss Lin, we didn't drink at noon, but we should have a good drink or two in the evening to celebrate."

He looked happier than Lin Feng, as if the world's top composite material rotor and hub were designed and developed by them.

Good intentions are hard to come by!
I am embarrassed to refuse such a warm invitation, Lin Feng readily agreed, "Then let Director Qian spend the money, and our two units will have a good night's fun."

Refreshing enough!
Qian Tao laughed loudly, and accompanied Lin Feng, talking and laughing.

From the moment he was picked up at the train station, Lin Feng has received high-level hospitality here. There are really not many people who can enjoy such treatment, at least in the eyes of several leaders, there are no two or three times a year.

Of course, the banquet in the evening was very lively. There were three tables, and the dishes were also very rich. Each table had two bottles of good wine.

Fortunately, Lin Feng has a good capacity for drinking, and there are a group of people below to stop the drinking, otherwise he might really get drunk. In the end, Director Qian and the others got drunk on several people.

The next day, because I drank a lot of wine, I got up late. After washing up, I thought to myself, it's time to buy a train ticket and go back.

Unexpectedly, Qian Tao's hearty laughter sounded outside the room door.

(End of this chapter)