Chapter 160: Overnight test (3/13)

The assembly process of an aero engine is very important.
Seven-point product, three-point assembly.
No matter how good the parts are, it is useless if the assembly fails.
With so many components combined, the total mass cannot exceed 1200 kg. That is 1.2 tons.
Because the original design standard of the turbofan 6 was a thrust-to-weight ratio of 8. It is to use 1.2 tons of weight to propel a 10-ton aircraft. If you install two, you can drive a 20-ton aircraft. At that time, it was hoped that the J 83 fighter jet 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 Turbofan 6 died before leaving the army. Later, the F-8 had to be replaced with two turbojet-13a twin-rotor engines, with a single thrust of only about 6.6 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. Even patrolling the South China Sea is difficult. Taking off from the southernmost airport of the motherland, there was no way to reach the vicinity of the great mother shoal. It can be said to be very regrettable. The practical ceiling is only 20,000 meters.
In fact, the shape design of the F-8 is really very beautiful. The aerodynamics are also very good. The only drawback is the engine.
If the beautiful man in the sky has a strong heart, Nanhai is not a problem at all.
Due to a bad heart, the aerial maneuverability of the beautiful man in the air is also seriously insufficient. In other words, it is not qualified to fight.
It is impossible to make frequent combat moves. The heart doesn't allow it.
One hour passed...
Two hours passed...
The components inside 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 temperature. But it will not decompose.
Its sealing performance and bonding performance are incomparable to other welding materials. Liquid metal can ensure that no part of it will melt or crack.
Why is this welding mentioned in particular?
Because the original turbofan 6 had the problem of fuel leakage.
Where is the defect?
It is the most basic thermal expansion and contraction!
The engine is very well sealed at room temperature. It will never leak.
However, once running for a long time, all parts of the engine are in a state of extremely high temperature, and naturally expand, they will squeeze each other, resulting in unforeseen cracks.
The U.S. Emperor’s SR-71 Blackbird high-altitude reconnaissance aircraft can also leak oil on the ground.
Even on the ground, its structure is loose, and it feels like it will fall apart at any time.
why?
It's just thermal expansion and contraction!
Once it takes off and reaches high altitudes, air friction, temperature rise, and parts expansion, it will match well.
Unfortunately, we have not yet mastered this special welding technology.
Now, it is Wang Bu'an's turn to solve it.
There is no need to doubt the elasticity of liquid metal. No matter how you expand or contract, there is no problem.
Wherever connection is required, liquid metal is used.
Three hours passed...
Four hours passed...
The last screw was welded to death by liquid metal.
There is no need to replace the screws inside the main combustion chamber. Once a problem occurs, it must be replaced as a whole.
Do you think it's finished?
of course not.
All parts of the engine should also be sprayed with flame retardants.
The flame retardant is of course produced by the industrial park itself. The level is only two. The flame retardancy is about 3600 degrees.
In other words, it can last at least 60 minutes in front of an open flame at 3,600 degrees.
If the temperature of the open flame is less than 3,600 degrees, it is completely fine.
Inside and out, as long as it is a place that can be sprayed, no matter it is three or seven twenty-one, all are sprayed. Anyway, there is no cost. Do not spray white or spray.
Including oil pipelines, electronically controlled pipelines, grooves, baffles, all of which are not dangerous at all.
When the aircraft is equipped in the future, they will all spray...
Do you think it's finished?
of course not.
There is one last procedure.
Install various accessories. In order to dock with the fuselage in the future.
The engine is a sleek one, and it certainly cannot be installed inside the fuselage. It must be welded with a lot of brackets, focus points, and fasteners on the outside.
easy to say, hard to do.
Where is the bracket installed? How big? Endurance data?
Where is the focus? You shouldn't put a focus on the outside of the main combustion chamber, it will cause an imbalance.
Where are the fasteners installed? It is absolutely not allowed near the air inlet. If the fastener comes off and is sucked into the air intake, congratulations, the engine can be scrapped. Hurry up and buy insurance in advance. Otherwise, your boss will definitely kill you. An engine is millions, tens of millions... The unit is US dollars. You are not worth so much money if you sell it.
There are also various sensors and monitors, which are even more troublesome to install.
A bird can destroy an engine, let alone a piece of metal?
Fortunately, there is liquid metal. Solder them all directly.
Unless the outside temperature exceeds 3600 degrees, there is no possibility of falling off.
You can't be careless!
Any detail may cause millions of dollars to be lost!
For example, the unit price of the Su-27 fighter plane imported by my country was only about 30 million US dollars. However, the price of one engine reached 4 million U.S. dollars, and the price of two engines required 10,000 U.S. dollars, accounting for more than 25% of the cost of the fighter.
The unit price of the fa-18 fighter jet exported from the United States to Canada is only 40 million U.S. dollars, but two f414 engines require 13 million U.S. dollars, and the total cost is more than 30%. We are not bad either. The unit price of our exported light fighter "Fierce Dragon" is only 16 million U.S. dollars, and the engine cost has reached 6 million U.S. dollars, and the cost of the entire body needs to be replaced one or two times. The final engine cost is likely to be more than the cost of a fighter. Even higher.
Five hours passed...
Start to check back and forth...
Starting from the basic line, to external ducts, internal ducts, turbine blades...
All inspections need to be recorded. A high-speed computer is required. It must be a physical product assembled to ensure that it is exactly the same as the design drawing in the computer.
The Polar Bear once had a bizarre failure of a MiG-29, which frequently stopped in the air, but the time was short, and then mysteriously recovered automatically. The ground crew looked up and down, but they couldn't find the reason. Finally, the engine was disassembled and sent back to the manufacturer. After unloading one thousand and eight yuan, it was finally checked. It turned out that a sealing washer inside the engine was installed upside down.
The function of this sealing washer is to maintain sufficient high pressure. After being installed upside down, its sealing effect is not good. If the pressure is too high, it will be discouraged. Causes the engine to stop. But after being discouraged, it returned to normal. Then the engine can continue to ignite and continue to run. Until the next time the pressure is too high to deflate. Back and forth.
Fortunately, it did not lead to fatal consequences if it was reinstalled. otherwise……
It's a trivial matter to spend millions of dollars in the water.
If a test pilot sacrificed, the loss would be great.
Any test pilot is the best pilot. Their value cannot be measured with money.
Why is aerial parking the most serious engine accident?
It will cause the plane to fall and crash.
Are you serious?
After repeated inspections for three hours, it was confirmed that there were no defects, and this turbofan 6 was truly completed.
The next step is to conduct various tests.
Test performance.
Test reliability.
Test durability.
The first test is of course ignition.
If even the most basic startup cannot be completed, it is a pile of scrap iron.
In addition, it is necessary to test frequent starting, stopping, starting, stopping... to ensure that the engine can work smoothly even under the panic operation of the pilot.
However, Wang Bu'an had no fuel.
The industrial park has all kinds of raw materials. There is no jet fuel.
Wang Bu'an turned to look at Cheng Kailong.
"What do you do?" Cheng Kailong didn't react at all.
However, he was so attracted by what he saw before him, he almost forgot what he was going to do.
His eyes have already seen the whole process. But the brain couldn't react.
"It's finished." Wang Bu'an said.
"So fast?" Cheng Kailong blurted out.
Only a few hours?
Actually an engine was assembled?
Doesn’t it take several days, even one or two months? You just... two, four, six, seven, eight hours in total!
An aero engine was produced in eight hours. Would it be so scary...
It happened that I also witnessed the entire production process.
"It's finished." Wang Buyan repeatedly emphasized, "Find a place to test."
"I'll look for it, I'll look for it." Cheng Kailong woke up like a dream, waving his hands excitedly, "Wait..."
He went to the distance and made a few calls. Then a gust of wind came back.
Wang Bu'an felt that he would take off at any time.
"Go to 556 Institute." Cheng Kailong said excitedly.
"Where?" Wang Bu'an asked casually, "Not far? Look, it's getting late..."
"It's not too late, it's not too late, test overnight, test overnight!"
"Ok."
Wang Buyan looked at the sky, it was indeed evening!
If it was his own intention, it would definitely be going back to the Li Palace Holiday Hotel and talk about it after a comfortable night.
The turbofan 6 engine is nothing but an artifact.
However, Cheng Kailong was so excited~EbookFREE.me~ so excited, he couldn't bear to hit.
Cheng Kailong continued to call for someone to come and move. He was waving his hands excitedly. Smoke. Found that it was done. In the end, only a reed was pulled out and held in its mouth.
Huh? How did the reeds come from the dry loess plateau?
Don't care about these details...
Soon after, a heavy truck arrived.
In fact, there is no need for heavy trucks. An Isuzu pickup truck can do it.
The weight of the turbofan 6 is only 1.2 tons, and the tractor can handle it.
But Cheng Kailong felt that heavy trucks were safe.
Wang Bu'an directed the hoisting of the manipulator.
The heavy-duty truck installed the engine easily.
A group of people set off for Yanzhou Airport.