Chapter 893

"Carbon fiber composite fan blades?"

Djokovic looked at Liu Cong suspiciously, and almost wrote the four words "I don't believe" on his head. Not only Djokovic, but also other Russian aviation industry executives and experts were deeply suspicious of Liu Cong's words.

It's no wonder that these old people will react like this. In today's world, only the United States can apply carbon fiber composites to the fan blades of turbofan engines.

That is the general ge-90 turbofan engine with large bypass ratio and high thrust, which can be called the king of power. The thrust of a single engine reaches 56.9 tons, thus sounding the death knell of the four engine airliner. Because the Boeing 777 equipped with two ge-90 can easily fly tens of thousands of kilometers between continents, and the fuel economy and maintainability are greatly improved. Compared with the four engine airliner like the Boeing 747, it is more convenient Some chicken ribs.

Of course, this is only one aspect of ge-90's civil aviation revolution. The reason why ge-90 can achieve such a high level of civil aviation revolution depends on various black technologies poured into it. One of them is the upper fan blade of primary fan made of carbon fiber. The reason why ge-90 can crush competitors such as RORO and Pratt & Whitney and ascend to the throne of aeroengine is largely due to this model It's an epoch-making carbon fiber fan blade.

Although carbon fiber composites have been widely used in aviation and aerospace, some important parts cannot be replaced by carbon fiber composites, including the fan blade of turbofan engine.

Because the strength of most carbon fiber composites is enough, but the toughness is quite different from that of titanium alloy and other metal materials, which leads to the failure of carbon fiber composites in the key index of bird impact. Often, after the bird impact, the carbon fiber composite fan blades are completely broken, leading to engine shutdown.

Therefore, the vast majority of aeroengine companies give up after a few rounds of tests. Only GM sticks to it and finally obtains carbon fiber composites with high strength and ultra-high toughness. On this basis, it completely overcomes the disadvantage of weak structural strength of carbon fiber in bird impact, and thus opens a new era of aeroengine.

What does this kind of scorpion cake mean?

Two words, monopoly.

Among other things, if you look at the US Boeing 777's air launch order, you can see that it has been smashed to GM without stinging.

As for the two competitors, RORO and Pratt Whitney, facing the crushing advantages of ge-90 technology, naturally know that they can't make a breakthrough in materials in a short time.

The new generation of twin engine wide body airliner represented by Boeing 777 will be taken away by general motors. Forced to do so, Pratt & Whitney simply takes advantage of its mechanical advantages and designs a set of complicated planetary gear sets between the primary fan and the engine air compressor, so as to reduce the speed of the primary fan and control the efficiency of the fan blade tip entering supersonic speed, The possibility of increasing the diameter of the first stage fan can be obtained by means of this nearly self injurious method of reducing efficiency.

Luo Luo is not as ruthless as Pratt & Whitney. Instead, he has sent out his traditional art skills and three rotor technology. When Luo Luo stepped into this deep pit, he almost lost his life. This time, he can't go back to the pit again. If he doesn't come up with an engine of the same level, he will have to be run to death by GM. if he stepped into the pit, he may be killed. It's better to fight.

Pratt Whitney and RORO, the powerful aviation giants, have no way to deal with the small fan blade on ge-90, let alone other enterprises or countries.

Among them is Russia, which has fallen to the bottom but is still ambitious.

A group of Russian aviation people with Djokovic as the core really want to make the general technical route and copy the glory of the Soviet era.

After listening to the impassioned speeches of Djokovic and others, the Moscow authorities were also excited and approved 20000 rubles as funds with a stroke of a pen.

Yes, there are only 20000 rubles, not 20000 US dollars. In Russia, the economy has been patted on the floor, and it has been devalued by all kinds of friction and blood drawing from the West. 20000 rubles, not to mention the cutting-edge carbon fiber composite fan blades, are hard to wipe with toilet paper.

What's more, even if it's not rubles but dollars, 20000 is not enough.

Because of this, Djokovic was helpless at that time, but he didn't feel sad that the country would be defeated. After all, only the United States had such ability in the world, and the only superpower with the only technology was a good match.

It's not that Russia can't do it, but that the reform at this stage has not been completed.

Just like the serfdom reform in the 18th century and the industrialization in the 1930s, Russia has experienced a long period of pain, but once the pain is over, the fighting nation, like the polar bear, will slap all obstacles.

As a result, China's take-off plan says that it has made such a thing that even the two major aviation giants and the former superpowers, who are not bad, can't make it.

After listening to this, Djokovic had a kind of university professor who listened to the kindergarten children figure out gotbach's conjecture at one stroke. The strong sense of absurdity made him have a kind of personal experience of what is called magic realism.It's good that you China can make the fourth generation fan blades. You can also make carbon fiber composite blades. Don't insult the term of carbon fiber composite. You know, like other things, this thing is divided into three parts, six parts and nine parts. That kind of carbon fiber with high toughness and high strength is only available in the United States. China is still in the process of catching up with modernization How can a country have this ability?

Of course, daydreaming is possible.

Liu Cong studied the manufacturing technology of engine fan blades with master Ju in his early years. Later, he was sent by Zhuang Jianye to Beihang University for further study. Later, he returned to Tengfei group to study management with Liu Chun. Until Liu Chun retired, Liu Cong went from behind the scenes to the stage.

To put it mildly, Liu Cong was blackened from the inside to the outside by two of the most slippery old guys in the original No.23 branch. In addition, Zhuang Jianye, the shameless "role model", was admired by Liu Cong day by day. Liu Cong, who was seemingly naive, was actually very dark inside.

Because of this, Djokovic puckered up, Liu Cong knew how many sheep dung eggs these old men could pull.

Now I see an old hairy man's unpredictable face. If I don't know what these people are thinking, then he won't have to say that he is the third big black belly tycoon of the 23rd branch in the future.

So he didn't answer directly, just waved his hand: "it's not far from the engine test field anyway, let's go and have a look."

Then he raised his legs and walked towards the test field. No matter what Djokovic thought, the host's house started, they could not stop and kept up.

Soon, the group came to the No.1 test bench of the test field, and went up the elevator. Just as a wd-60ml turbofan engine was being hoisted on the facilities and equipment, Liu Cong pointed to the stopped engine fan blade: "here ~ ~ that is the carbon fiber composite blade produced by our own t-zb800 carbon fiber!"

Djokovic and others followed the reputation and only looked at it once. A group of people immediately opened their eyes and couldn't say a word.