Alien Industrial Tyrannosaurus-Rex

A long, long time ago, two young people got together, and they were determined to build an advanced aircraft engine.

The first young man said: "I plan to start from scratch, learning other people's works first, starting from models with low material and craft requirements and simple structures. Then I will figure out how each part of this thing works bit by bit. , How to cooperate. Through a little bit of trying to modify their designs, find the rules among them, and summarize a set of theories. Finally, you can make the most reliable and best models within your ability according to your own materials and technological level. ."

The second young man said, "Well, it's not necessary to start from scratch. Let's copy this thing first, it's pretty simple--ah, it's broken? Forget it, let's not do this, let's copy the next one." "I copied a few engines and found that it's nothing difficult. Let's build a very advanced one, which is three blocks better than foreign countries, right-I can't do it with so much effort? Forget it, we can't fix this. Stop doing it, buy foreign ones." "These foreign engines are good, buy some more—what, don’t you sell them abroad? Hurry up and do it yourself." "Damn, it's so difficult..."

Self-reliance, gradual progress.

Copycats learn from and tinker with it.

This is the two-legged walk in my country's aviation engine research.

Two completely different roads.

One is to start from scratch.

One is to start directly from the castle in the air.

Due to historical reasons, these two legs are always uneven. I limped left for a while, then limped again.

Sometimes, both legs are still lame.

Obviously, the first young man is a reasonable example on the road to self-improvement in engine development. Our country needs so many engines, it is absolutely impossible to copy by copying.

Unfortunately, the actual situation in our country is closer to second place. In the long history of engine imitation, improvement, self-research and introduction, my country’s engines have been in a state of making one or losing one for a long time, failing to systematically summarize the accumulation of technology and experience, and sublimate it into a set. A complete theoretical system is used to guide the research and development of new engines. In this distressing experience, Turbofan 6 is the most controversial one.

Some people even attacked it as the biggest cancer, and it has been so intense that it is hard to imagine.

And later generations of military fans, with regard to the dismounting of Turbofan 6, their attitudes are also very polarized. Some are heartbroken, some are gloating, and some are relieved.

More people are at a loss, and don't know what's going on.

In the words of Baidu Encyclopedia: "The turbofan-6 aero engine is the first military afterburner turbofan engine with a thrust-to-weight ratio of 6 and was first developed in the 1960s. The development was stopped in the early 1980s. It was not put into use, but it is of great significance in the history of China's aviation industry."

To quote an in-depth article: "So far, none of the domestic aeroengines put into service in China has been developed independently in the strict sense. Starting from a type of blade and a roulette, it gradually forms a level Compressor rotor, one-stage turbine. Then gradually expand the number of stages to become a basically complete combination of high and low pressure gas and turbine. Then the core engine of the engine and even the complete gas generator are tested, and finally the model verification machine is derived from this , And finally perfected into the equipment model-this kind of thing has never appeared in China's public aero engines."

"This long-term lack of upstream research prevents my country from forming a solid and detailed theory, test basis, design basis, and methods in the engine field. In the process of model development, developers have to refer to various types of existing engines and adopt similar Principle scaling design or even direct surveying, reverse engineering, patchwork and integration of various parts of different models of engines in different countries."

"It is under this background that the turbofan 6 has an extremely high performance index (12.6 tons of thrust, which is as high as the index of the Taihang engine) and an unprecedentedly difficult model. The preliminary design began in October 1964, but it appeared in In 1966, all the drawings were completed, and the magical speed of trial production of prototypes began. In this hazard-laden design, the defects of performance matching and coordinated operation among a large number of components are hidden under the shortage of materials and craftsmanship; trial production with serious shortages Components and prototypes make it extremely difficult to eradicate these intertwined faults, and exhaustive methods are still invisible."

In general, Turbofan 6 is a big tragedy.

It mounts three times, dismounts three times, and relocates its production base five times. Intermittently, lingering.

Its researchers believe that it was born out of time and has ill-fated fate.

But onlookers believe that the study of Turbofan 6 was wrong from the beginning. It is simply a castle in the sky, a mirage.

Researchers believe that the failure of Turbofan 6 is due to insufficient investment.

Onlookers believe that Turbofan 6 is a waste of precious national resources.

Although forty to fifty years have passed, the pros and cons of the turbofan 6 are still being debated. There is always no conclusion.

What is Cheng Kailong going to do?

Take yourself to see the remains of Turbofan 6?

"Your guess is not wrong. Our technology team is also very polarized." Cheng Kailong said bluntly, "Some people advocate starting from scratch, step by step. Start with a few solid products. Even if the various indicators are smaller. It doesn't matter. But more people come up to push hard, ranking first in the world in various indicators."

"I'm afraid the latter has the upper hand, right?" Wang Buan sneered disdainfully.

"It's true." Cheng Kailong said without shy, "the current flamboyant style is also a bit powerful."

"Everything surpasses Britain and catches up with the United States!"

"But the actual situation is not so good."

"Uncle Ella."

"Ha ha."

Cheng Kailong smiled wryly.

He certainly understood what Wang Bu'an meant.

Uncle Ella is the homophony of the polar bear "al-31f" engine. It is the latest engine introduced in our country.

On the one hand, it is an overwhelming propaganda that domestically produced aero engines has broken through the level of something. It feels very powerful. It seems that the American Emperor can be slapped at any time. But on the other hand, it is necessary to purchase advanced engines from foreign countries. Anyone with a discerning eye can see that there is a problem. Of course, the specific inside story is not good at the details.

Some scientific researchers have become old fritters.

Sleek sophistication and deception.

Can Taihang engines work? It has caused a lot of controversy. Some people's views are still very intense.

In Wang Bu'an's view, Taihang has made great progress. But there are also shortcomings.

Because the Taihang engine was developed on the basis of the turbofan 6. There are some usual problems.

The publicity must be partly exaggerated.

Some of the data must be falsified.

Only the troops themselves know the true performance.

After the Taihang engine was equipped with fighter jets, it stopped in the air twice, causing extremely serious damage.

As for the parts flying out of the engine, Wang Buan would rather believe that it was the enemy's slander. Otherwise, its designer must be dragged out for shooting. Too awkward to kill people.

"Arrived."

"Get out of the car."

Cheng Kailong brought Wang Bu'an to its industrial park.

From a distance, Wang Bu'an saw a large aero engine placed outside the industrial park.

Its appearance was already rusty, crumbling and dilapidated.

However, its basic body shape is still complete.

This is the turbofan 6 aircraft engine.

An unavoidable topic.

A controversial thing.

Wang Buan walked to the side of Turbofan 6 silently.

Its remains are relatively complete.

After all, it has never been officially installed on an aircraft in service. There is no possibility of being destroyed.

However, the parts inside it are already very badly damaged.

This is the result of trial and error.

Especially the life test is very devastating to the engine.

He reached out to touch the metal wreckage.

Robot Wizard One automatically analyzes the composition of the metal.

The shell is an ordinary iron-based alloy, and the temperature is about 760 degrees. Obviously there is no problem.

The outer shell of the engine generally does not have too high temperature.

The inner wall is mainly a nickel-based alloy. Withstand temperature of about 1200 degrees. This is a problem.

Once the speed of the turbine is extremely high, the temperature of the inner wall is definitely more than 1200 degrees. Under normal circumstances, it will reach or exceed 1500 degrees.

Obviously, there is a 300-degree gap in the middle.

This gap is very fatal. It can cause extremely serious problems with the engine at any time. It is very difficult to pass the test.

The most important thing is the turbine blade. It is also a nickel-based alloy.

Obviously, this is the most fatal flaw.

Because the maximum temperature of nickel-based alloys is about 1200 degrees.

The turbine blades need to withstand temperatures exceeding 1500 degrees.

More importantly, the strength of nickel-based alloys cannot be used to make turbine blades.

Turbine blades not only have to withstand very high temperatures, but also withstand very high pressures, as well as extremely terrifying centrifugal forces.

Nickel-based alloys can't even reach the first point, and the latter two points are even more difficult.

According to the estimation of the quality of the turbine blades of this turbofan 6, it will run for about 10 hours at most, and then the turbine blades will have to be scrapped.

10 hours is obviously worthless.

Does a fighter plane fly for an average of 10 hours before having to dismantle the engine for overhaul?

I'm afraid the Air Force Rabbit will shoot you.

There is no doubt that the performance of cobalt-based alloys is the best. Withstand high temperature can reach more than 1500 degrees.

The problem is that my country is a country with very scarce cobalt resources.

The technical difficulty of manufacturing cobalt-based alloys is also very large.

On the wreckage of Turbofan 6, Wang Bu'an did not find any cobalt resources.

I don't know if the properties of cobalt were not discovered at all, or the cobalt-based alloys at that time had not yet been noticed.

Inferring from this, the history of this turbofan 6 should be very long.

Such a backward engine is rare now.

Nowadays, the proportion of nickel-cobalt alloy in aero engines is getting heavier. The proportion of titanium alloy is also increasing.

Only nickel-cobalt alloys can withstand extremely high temperatures. Titanium alloys reduce weight.

As for the turbine blades, they are all single crystal blades.

When nickel-based alloys are used for turbine blades, it is no wonder that there are rumors that there are parts flying out of the engine.

Really, it's not surprising at all.

Once the turbine blades fall off or break, anything can happen.

In the final analysis, it is still a matter of raw materials.

The level of raw materials is not enough, even the best design is difficult to achieve.

Conversely, if the quality of the raw materials is good enough, even if the design has some flaws, it can explode with amazing power.

"Which garbage dump did you turn it out?" Wang Bu'an asked casually.

"I pulled it out of the abandoned warehouse in Yanzhou Airport." Cheng Kailong said, "I gave it to you."

"What is it for me?" Wang Bu'an shook his head and said, "It's worthless."

"If you can copy one, you can stop a lot of people."

"Copy? What do you mean?"

"According to its design specifications, make a usable turbofan 6 without major problems."

"why?"

"Prove your ability. Prove that you, Wang Bu'an, are not idlers, glib tongues, criminals and criminals."

Cheng Kailong said solemnly.

He can't joke. He really hopes that Wang Bu'an can do it.

At the beginning, the design of the turbofan 6 was so far-reaching, so great. With the technical conditions at the time, it could not be achieved at all. However, to this day, it is outdated.

The large thrust engines in the world today are often 14 tons or more than 15 tons. The maximum even reached more than 18 tons.

There is even news that the American emperor’s f-135 engine has undergone a major upgrade and has also passed ground tests with a thrust of more than 23 tons.

The design of the turbofan 6 is less than 13 tons. Obviously it can't keep up with the times.

However, this is definitely not to say that it is useless.

On the contrary, it has many uses.

You know, there are many less advanced aircraft in our country.

If the turbofan 6 can be replaced with reliable quality, the performance of these aircraft can also be greatly improved.

For example, F-6, F-7, F-8 and so on. There are also various trainers.

The key is to have reliable quality and low cost.

"Complete copying is impossible." Wang Buyan shook his head and said.

"Why?" Cheng Kailong was a little disappointed.

"Because I don't want to copy such a backward product."

"What do you mean?"

"The same design, with a little modification, can reach about 18 tons of thrust."

"Are you serious?"

Cheng Kailong immediately extinguished the cigarette in his hand with excitement.

Can the turbofan 6 reach 18 tons of thrust?

how is this possible?

Is Wang Bu'an serious?

Isn't he also talking nonsense and deliberately exaggerating the data?

"You don't have to doubt. It is not a big problem if the thrust is increased to 18 tons." Wang Bu'an said methodically~www.wuxiaspot.com~ You should remember how the turbofan 6 passed the test. "

"Of course I remember. Increase the temperature of the combustion chamber. It has increased by more than 50 degrees." Cheng Kailong said angrily.

"Yes. Just forcibly raise the temperature by 50 degrees."

"But the consequences are extremely serious."

"Yes."

How serious are the consequences?

As a result, the overall life of the engine has been greatly reduced. The overhaul time is less than 150 hours.

In other words, an engine needs to be replaced in 150 hours at most.

So there is a phenomenon of buy one get one free.

why?

There must be 10 more on the shelves. Maybe 13 will be there too. Thank you all for your support.