Yodel was shocked, and then looked at the young technicians who were talking and laughing in front of the S-70 helicopter, and his eyes became a little complicated.

It's no wonder that Joddle is like this, because the integrated tooth, shaft, and bearing structural components are not ordinary components, but one of the most cutting-edge key components of helicopters.

Because it is with this key component that the helicopter's final drive has increased its service life from about three thousand hours in the seventies to more than six thousand hours.

It has been doubled, which is not a leap forward, but a flyover to improve the comprehensive performance of the helicopter, such as safety, adaptability and maintainability.

As for what is a final drive?

If the heart of a helicopter is the turboshaft engine, then the helicopter final drive is the aorta that connects the heart.

Because of this, the helicopter after the final drive, just like the car with the gearbox, is not important, but quite important.

Therefore, the quality of the final reducer directly image the performance of the helicopter, but this thing is too complicated, dense gears, bearings, connecting shafts tightly bite together, not to mention anything else, just a variety of gears, the optimized design of the bearing will make the designer's thick hair directly tired bald.

What's more, these internal gears, shafts and bearings are all aviation-grade precision components, not to mention the time-consuming and laborious processing, but also a large number of lightweight materials, rigid materials, all in all, its difficulty is no less than that of ordinary aero engines.

Because of this, only the United States and the Soviet Union can do a good job in the helicopter final reducer in the world, and Europe is a younger brother in this regard, and it needs to rely on the export of technology from the United States in order to barely maintain the status of the so-called "helicopter development and production area".

But even so, the quality of the final reducer is not the same, the top of course belongs to the United States, the vast majority of helicopters in the world have a service life of about 3,000 hours.

The life of the main power transmission components of the American Apache helicopter gunships has already reached eight thousand hours.

The Gulf War at the beginning of the year was a good proof of this, and in the desert areas of the Middle East, where the climate is changeable and sandstorms are severe, Apache helicopters have shown good sustained combat capability.

Compared with the "Little Antelope" helicopter sent by France, the accuracy rate of the British "Bobcat" helicopter is obviously much worse.

The reason for such a contrast is that the United States has applied a new shaft-bearing-gear integration technology to the main reproduction of their Apache helicopter gunships.

The originally separated shafts, bearings and gears are regarded as a whole by using the unit design principle, and then the finite element software is used to model it to form a complete assembly model, and then the design software is used to produce the drawing, and then it is manufactured through advanced processes such as precision machining, complex heat treatment, electron beam welding, and laser welding.

In this way, more than 10 gears, shafts and bearing components of a certain part of the original final reducer are completely replaced by this compact structural component, and the processing uses very precise processing technology, so that this part of the main reducer components is not only simple in structure, easy to maintain, and the overall structural weight is also greatly reduced.

What's more, because it is an integrated design, the degree of structural optimization is much higher than that of the original distributed component design, and the lubrication effect is not only efficient, but also with the suppression of the overall vibration, the service life is increased at once.

A total of several of these shaft-bearing-gear integrated components are applied to the final drive on the Apache gunship, eliminating nearly 100 parts.

Not only does the Apache gunship's final drive capable of transmitting a high speed of 20,000 revolutions per minute, but the overall life is also close to that of the turboshaft engine it carries.

At the same time, it also makes the Apache gunship powertrain more compact and lightweight, leaving a lot of redundancy space for subsequent armor protection and the installation of the Longbow radar in the future.

Therefore, it is not an exaggeration to say that the integrated technology of shaft-bearing-gear is a subversive core technology.

In contrast, the Soviet Union is much inferior, still using the traditional gear, shaft, bearing design separately, centralized optimization, it is no problem to use, but the service life is difficult to exceed 3,000 hours, and the daily maintenance is also very inconvenient, the accident rate is high, as for the compact or something, not to mention it, compare the height of the Mi-28 and the Apache fuselage.

m-28 is 4.81 m high and Apache is 4.05 m.

The difference between the two is 0.76 meters.

Don't look at this gap of more than half a meter, it is equivalent to an increase of several orders of magnitude in the area of the bomb on the battlefield.

Didn't the Soviets want to make the Mi-28 helicopter gunship low and have a smaller bomb area? It's not that they don't want to, but they can't, and for this reason, the technology is almost meaningless, and there is no way to balance compactness and service life.

The Europeans are better, and the final drive in the A-129 helicopter gunship produced in Italy has applied the integration technology of shaft-bearing-gear.

It's just that many of the core technologies of the Italian A-129 armed helicopter are purchased from the United States, including the shaft-bearing-gear integration technology, and the Italian contractor handed over the design drawings of the main reducer of the A-129 armed helicopter to the United States, and the United States helped optimize the shaft-bearing-gear integration technology, which has the excellent power transmission performance of the A-129 armed helicopter.

All in all, in short, the shaft-bearing-gear integration technology is the key to the rebirth of the helicopter, even in Europe, where aviation technology is developed, it is also at the absolute frontier.

Not to mention, the European "Tiger" helicopter has been launched for several years, but the test model has not been released for a long time, and what is the reason? It is not that the performance of the shaft-bearing-gear integration technology applied to the final reducer is not up to standard, which has delayed the entire progress.

What is not even reasonable in Europe, can be done in backward and poor China?

"Mr. Yodle~~ Mr. Yodle?"

Just when Yodel was shocked, he finally digested Gu Jingyou's words, and completely denied that China did not have the ability to possess such key technologies with his rigorous analysis unique to the German nation, the concerned voice of the leader of the army aviation who was asked by him interrupted Jodel's myth.

Hurriedly smiled apologetically: "I suddenly thought about something just now, it's okay...... It's all right......"

"If you feel uncomfortable, there is a doctor on site who can check it for you. The leader of the army aviation was still very concerned about Yodel's situation, and Yodel hurriedly waved his hand: "No, no, I'm really good." ”

The voice fell, and he was just about to ask the leader of the army aviation next to him about the shaft-bearing-gear integration technology that Gu Jingyou just said, but he heard the sound of the helicopter propeller turning outside the hangar, and immediately interrupted what Yodel was going to say. ”

Yodel nodded suddenly, it is common for civilian helicopters to land and replenish supplies at military stations, and there is no way to make most of the helicopters belong to the type with short legs.

So he subconsciously glanced at the airport outside the hangar, and at this look, Yodel immediately opened his mouth wide, and almost subconsciously shouted: "S-64, aerial crane?"

Immediately, he quickly shook his head: "No, it's much smaller than the aerial crane, this is ......"

As a result, before he could guess what model the strange helicopter that was landing outside, he heard the young man named Zhuang Jianye not far away also lose his voice in surprise: "Why did our group's helicopter come here?"