The assembly process of the aero engine is very important.

Seven points of product, three points of assembly.

No matter how good the parts are, if the assembly is not up to par, it is also in vain.

With so many parts combined, the total mass cannot exceed 1,200 kilograms. That's 12 tons.

Because the original design standard of the turbofan 6 was to achieve a thrust-to-weight ratio of 8. It is to use the weight of 12 tons to propel a 10-ton aircraft. If two are installed, it will be able to propel a 20-ton aircraft. At that time, it was hoped that the J-8 fighter would have a take-off weight of 14 tons without weapons, and a take-off weight of about 18 tons with weapons.

It's a pity that the turbofan 6 died before he could get out of the division. Later, the J-8 had to be replaced with two turbojet-13 twin-rotor engines, with a single thrust of only about 66 tons.

Due to the lack of power of the engine, this fighter, known as the "beautiful man in the air", has a range of only 2,200 kilometers, which is a serious short leg. It's hard to even patrol the South China Sea. Taking off from the southernmost airport of the motherland, there is no way to reach the vicinity of the dark sands of Zengmu. It can be said that it is very regrettable. The practical ceiling is only 20,000 meters.

In fact, the shape design of the J-8 is really very beautiful. The aerodynamics are also very good. The only downside is the engine.

If it is a beautiful man in the air with a strong heart, the South China Sea is not a problem at all.

Due to a bad heart, the air mobility ability of the beautiful man in the air is also seriously insufficient. In other words, it's not suitable for martial arts.

If you want to make frequent combat maneuvers, it is impossible. The heart does not allow it.

An hour passed

Two hours passed

The internal parts of the turbofan 6 engine are basically installed.

The manipulator begins to perform the most precise welding.

Liquid metal is used for welding.

It is characterized by fluidity at high temperatures. But it doesn't break down.

Its sealing performance, as well as its adhesion performance, are incomparable with other welding materials. Liquid metal ensures that no part of the body will melt or crack.

Why mention this weld in particular?

Because the original turbofan 6 had a problem with fuel leakage.

Where are the flaws?

It's the most basic thermal expansion and contraction!

The engine is very well sealed at room temperature. Absolutely no leakage.

However, once it runs for a long time, all parts of the engine are in an extremely high temperature state, and the natural expansion will form a mutual squeeze, resulting in unforeseen cracks.

The US imperialists' 71 Blackbird high-altitude reconnaissance plane will also leak oil on the ground.

Even, on the ground, its structure is loose and loose, and it feels like it will fall apart at any time.

Why?

It's thermal expansion and cold contraction!

Once it takes off, when it reaches high altitude, the air frictions, the temperature rises, and the parts expand, it will fit very well.

Unfortunately, we have not yet mastered this particular welding technique.

Now, it's Wang Buan's turn to solve it.

There is no need to doubt the elastic properties of liquid metal. No matter how hot you expand or contract, there is no problem.

Wherever there is a need for articulation, liquid metal is used.

Three hours passed

Four hours passed

The last screw was welded dead by liquid metal.

The screws inside the main combustion chamber have not been replaced. Once there is a problem, it must be replaced in one piece.

You think it's done?

Of course not.

All parts of the engine are also sprayed with flame retardants.

The flame retardant is, of course, produced by the industrial park itself. There are only two levels of rank. The flame retardant capacity is about 3600 degrees.

In other words, in the face of a 3600-degree high temperature open flame, it can also last for at least 60 minutes.

If the temperature of the open flame is not enough to 3600 degrees, then it is completely fine.

Inside and out, as long as it can be sprayed, whether it is 3721, all of them are sprayed. There is no cost anyway. Don't spray white, don't spray.

Including the oil pipeline, the electric control line, the trench, the baffle, all spray spray spray.

Later, when the plane was equipped, it was all sprayed

You think it's done?

Of course not.

And one last procedure.

Retrofit with a wide range of accessories. so that it can dock with the fuselage in the future.

The engine is a round one, and it definitely can't be installed into the fuselage, and it must have to weld a lot of brackets, stress points, fasteners, and the like on the outside.

Easier said than done.

Where is the bracket installed and how much is the capacity data?

You don't have a focus point outside the main combustion chamber, that's going to cause imbalance.

Where are the fasteners installed? In the unlikely event that the fastener comes off and is sucked into the air intake, the engine is ready for scrap. Buy insurance in advance. Otherwise, your boss will definitely beat you to death. An engine is a few million, tens of millions of dollars in dollars. It's not worth so much money if you sell it.

There are also a variety of sensors and monitors, which are even more cumbersome to install.

A small bird can destroy an engine, let alone a piece of metal?

Luckily, there is liquid metal. Just solder them all to death.

Unless the outside temperature exceeds 3600 degrees, there is no possibility of falling off at all.

If you're not careful, you can't!

Any detail can lead to millions of dollars being wasted!

For example, the unit price of the Su-27 fighter imported by China that year was only about 30 million US dollars. However, the price of one engine reached 4 million US dollars, and the price of two engines required 8 million US dollars, accounting for more than 25% of the cost of fighters.

The unit price of the 18 fighters exported by the United States to Canada is only 40 million US dollars, but the two 414 engines cost 13 million US dollars, and the total cost is more than 30. We're not bad either. The unit price of the light fighter "Thunder" exported by us is only 16 million US dollars, and the engine cost has reached 6 million US dollars, and the entire airframe cost needs to be replaced 1 or 2 times, and the final cost of the engine is likely to be higher than the cost of the fighter.

Five hours passed

Start the cycle of checking

Starting from the basic line, to the outer duct, the inner duct, the turbine blade

All inspections need to be documented. A high-speed computer is required. It must be an assembled physical object, and make sure that it is exactly the same as the design drawing in the computer.

Polar Bear once had a MiG-29 that had a bizarre malfunction and was often stopped in the air, but for a short time, and then mysteriously recovered automatically. The ground staff checked back and forth, but could not find out the reason. Finally, the engine was dismantled, sent back to the manufacturer, and a thousand and eight pieces were unloaded, and finally checked out. It turned out that one of the gaskets in the engine was reversed.

The purpose of this gasket is to maintain sufficient high pressure. After reversing the installation, its sealing effect is not good. If the pressure is too high, you will be deflated. Causes the engine to stop. But after being deflated, it returned to normal. Then the engine can continue to ignite and continue to run. Until the next time the pressure is too high and deflated. Cycle.

Fortunately, it was reversed, so it did not lead to fatal consequences. otherwise

Millions of dollars are still a small thing.

If a test pilot is sacrificed, the losses are great.

Any test pilot is the best pilot. Their value cannot be estimated with money.

Why is air parking the worst engine accident?

It causes the plane to fall, to fall.

Serious, you say, is it serious?

After three hours of repeated inspections, it was determined that there were no defects, and the turbofan 6 was truly completed.

Next, it's time to conduct a variety of tests.

Test performance.

Test for reliability.

Test durability.

The first step of the test, of course, is ignition.

If you can't get even the most basic start-up done, it's a pile of scrap metal.

In addition, frequent start-up, start-up, start-out and stop-fire tests are required to ensure that the engine can work smoothly even under the pilot's panicked operation.

However, Wang Buan did not have fuel.

There are all kinds of raw materials in the industrial park. It's just that there is no aviation kerosene.

Wang Buan turned his head to look at Cheng Kailong.

"What are you doing?" Cheng Kailong didn't react at all.

But he was so attracted by the scene in front of him that he almost forgot what he was going to do.

His eyes were already seeing the whole process. But the brain can't react.

"It's done. Wang Buan said.

"So fast?" Cheng Kailong blurted out.

It's only been a few hours?

Actually an engine was assembled?

Doesn't it take days, or even a month or two? You're only two-four-six-seven-eight, and it's only taken eight hours in total!

Eight hours to produce an aero engine, should it be so scary

I also witnessed the entire production process.

"It's done. Wang Buan repeatedly emphasized, "We must find a place to test." ”

"I'm looking for it, I'm looking for it. Cheng Kailong woke up like a dream, waving his hands excitedly, "You wait"

He walked into the distance and made a few phone calls. Then a gust of wind came back.

Wang Buan felt that he would take off at any time.

"Go to the 556 Institute. Cheng Kailong said excitedly.

"Where is it?" Wang Bu'an asked casually, "Isn't it far?"

"It's not too late, it's not too late, it's not too late, it's not too late, it's not too late!"

"Okay. ”

Wang Buan looked at the sky, it was indeed evening!

If it was his own intention, it would definitely be to go back to the Holiday Inn Ligong and spend the night comfortably.

The turbofan 6 engine is just that, and it's not an artifact.

However, Cheng Kailong's mood was so excited and excited, he couldn't bear to blow.

Cheng Kailong continued to call people to come and carry it. He waved his hands excitedly. Smoke out. I found that the draw was finished. In the end, I could only pull out a reed and hold it in my mouth.

How did the reeds come from the dry Loess Plateau?

Don't care about these details

Soon after, a heavy truck arrived.

Actually, there is no need for heavy trucks at all. An Isuzu pickup truck will do the trick.

The weight of the turbofan 6 is only 12 tons, which can be handled by a tractor.

But Cheng Kailong thinks that heavy trucks are safe.

Wang Bu'an commanded the manipulator to lift.

Heavy trucks have their engines loaded up with ease.

The group set off towards Yanzhou Airport.