Chapter 766 Preliminary Test Completed

With the feedback of data, Liu Hai breathed a sigh of relief as the tests passed one by one.

Although Sun Aiguo did not understand what each test represented, he watched Liu Hai write down the data one by one on the notebook. Each test had a correct interval value. If the test result was between these correct values, then there would be no problem.

The reason why this value is an interval is that the working state of the engine itself is different. When the engine is under power, the data of each part is higher, such as temperature, oil pipe pressure, etc.

"Director, the preliminary test of the engine has been completed. How long do you think it will take to get on the test bench?" This is also a necessary process.

"Get on, get on immediately, it's ready over there." Sun Aiguo was waiting for this sentence.

Then Sun Aiguo, Liu Hai and the deputy director in charge of military industry signed.

The engine that has been tested on site will be sent to a professional test bench for testing.

This test bench is not inside the motorcycle factory, but in a ravine.

The next day, Liu Hai, Sun Aiguo and others also went to this place together.

The engine is packed at the factory, then loaded into a box truck and transported to the test bench.

Although it looks like a few vans, the security is still very strict.

We arrived safely and smoothly in the mountainous area where the test bench is located. After the engine was unloaded, it was checked again before it was put on the test bench.

Anyway, this is the engine test process.

After connecting various pipelines and starting equipment, it was not Liu Hai who commanded this time, but professionals.

The engine started to ignite, and Liu Hai, Sun Aiguo and others looked at the engine on the test bench in the ravine from a distance.

Although in theory, various safety measures have been taken for the test run, Liu Hai and Sun Aiguo are still far away, because no one knows what will happen.

In fact, the risk of testing this kind of fighter engine is not high. The high risk is the liquid fuel rocket thruster, and the dangerous thing is also the fuel.

In case of leakage or other accidents, it will be troublesome.

When Liu Hai saw the red flame sprayed from the tail of the engine, he knew it was stable. No matter what, as long as the ignition is successful, even if there are problems later, it can continue to optimize.

After a month of continuous testing, the preliminary data of this engine was finally obtained.

"Very good, very good!" On the day when the test data came out, the leaders of the relevant departments of the fighter jets came in person. Looking at the data on a thin piece of paper, they almost laughed out loud with joy.

The data are as follows: single-unit thrust 8.0 tons, afterburner thrust 13.1 tons.

The overall weight of a single unit is 1.6 tons.

The fan is a 3-stage axial flow type, and the rotor blade material is titanium alloy.

The compressor is a 9-stage axial flow type, the first 3 stages are made of titanium alloy, and the last 6 stages are special steel.

The fuel in the combustion chamber is sprayed and atomized through multiple double-cone nozzles and multiple small vortex cups to achieve smokeless combustion, with a uniform outlet temperature field, and the material is a high-temperature resistant nickel-based alloy.

The high-pressure turbine is a single-stage axial flow type, with high-load air-cooled blades, using impact and air film cooling, and the blades are cast using a single crystal casting method.

Alloy crystallization is one of the most important technologies in aviation engines.

This engine is Liu Hai's engine based on the Su-27's own engine, absorbing part of the F135 engine on the aircraft carrier.

There is also the F404-GE-402EPE engine used by the F/A18C, with a thrust of 7.9 tons. Historically, this engine was replaced in 1991.

Of course, the f135 engine is a fully digital system, so it is impossible to copy many things now.

The f135 engine is used from the f22, and is extended from the f119 engine. The afterburner thrust exceeds 18 tons.

However, the f135 engine cannot be copied now, and the full electronic control system is not suitable now.

Moreover, if the full electronic system is used for control, the performance of the current engine can be improved.

"Liu Gong, good job!" The department leader took the lead in applauding the department. Before the leader came, he had memorized the relevant technical data in our country.

The thrust of the aircraft engine currently used in our country is less than 6 tons.

What does the thrust of the aircraft engine represent? It represents combat effectiveness, which means that it can carry more fuel, expand the combat radius, and carry more weapons and equipment, making the fighter more combat-effective.

Carrying a more powerful radar allows the aircraft to see farther and hit farther.

"Thank you for the compliment, this is what I should do." Liu Hai was modest on the surface, but he was actually very happy in his heart. He passed the big test.

Although the various parameters of this engine are still far behind the engine indicators of the fifth-generation aircraft of various countries in 2020, I have put a lot of effort into this engine, and it can be said that there are many technical integrations.

After all, the engine technology I learned at the beginning and the engine technology on the aircraft carrier belong to two directions. Of course, our Taihang engine also absorbed the strengths of various companies later.

However, Liu Hai was also very tired during this period. Whenever he had time to enter the aircraft carrier space, he stayed in it for a long time. Thanks to the various design software in the aircraft carrier space, there is a special aviation engine software on the aircraft carrier, which mainly helps engineers quickly understand the current status of the aircraft engine, service life, etc.

Of course, there are also a lot of information in the hands of many engineers that is very helpful.

In fact, the most important thing is the information in the hands of engineers, because if engineers want to complete the maintenance and diagnosis tasks of aircraft, they must have enough information to judge and have enough methods to quickly repair and maintain.

The notes of these engineers are the most important, because many tips are not in the regular process.

Later, why did the bald eagle say that he could not go to the moon again? On the one hand, it was said that his information was lost, but more people said that the workers' notes were gone.

In fact, in 2020, Fat Goose is also like this in many weapons and equipment. There is enough information, but there is no one to turn these information into complete parts or equipment.

Because the generation of old workers between the two countries has grown old, and the new workers have no idea how the old workers did it.

To put it bluntly, just like some ancient crafts in our country, you can't restore them even if you get these process records intact.

Fat Goose has spent many years without fully understanding the control system of their Tu-160 bomber, let alone changing the control system to an electric-by-wire system.

Of course, another disadvantage of Fat Bear is that before the separation, his technical system, whether manufactured or designed, was not completed in one place.

For example, the engine parts of this aircraft may be gathered from the parts produced by hundreds of factories in his member countries.

So it will be more difficult to restore it.

Of course, there is no money on the other hand. If there is money to keep trying and making mistakes, then it may take a few years to figure it out.

As for the situation of the bald eagle, it is hard to say whether it is a fake data or a real data loss.

The applause in the conference room lasted for a long time. Those who can attend this meeting certainly know what this fighter engine means to us.

As for the cost, don't talk about it at all, because in the face of national defense, no matter how big the investment is, it must be made.

Of course, the cost of this aircraft engine is not cheap, and a large number of various high-temperature resistant alloy materials are used.

The raw materials of these alloy materials have a small storage volume and a small content in the ore. If you want to get enough raw materials, you have to mine more ores and then refine more ores.

It can be said that the price of many rare metals exceeds that of gold, such as metal Lai, which is one of the indispensable materials for aviation engine crystallization and one of the materials required for the combustion chamber nickel-based alloy, but the reserves of this thing are limited, which can be said to be more difficult than panning for gold in the sand.

Liu Hai also calmly accepted everyone's applause. After all, he really made great efforts this time.

"How long will it take for this engine to be mass-produced?" The main leader asked impatiently after the applause died down.

"We started making engines half a month ago to test our newly designed fighter jets." Sun Aiguo said.

Sun Aiguo's level is high enough to make the decision to produce privately. According to the process, it cannot be produced before the engine test is completed, because no one knows whether the engine is qualified or not.

Dongfang Heavy Industry's enterprise level is high enough, and Sun Aiguo's qualifications are sufficient, so it is completely fine to make the decision. Even if there is a problem with the subsequent engine, the scrapping of the previously produced engines will not have much impact on Sun Aiguo.

If it were someone else, they would definitely not have this courage, because the materials used in this engine itself are expensive, not to mention the electricity, manpower, material resources, etc. consumed in production.

"Good." The department leader said a good thing about Sun Aiguo's doing this.

"What about the fighter jet?" The department leader asked again.

"Basically, we are waiting for the engine. The fuselage has been built, and we are waiting for the engine to be installed before starting ground testing." Sun Aiguo said with a grin.

To be precise, the fuselage has been manufactured, and the engine is just waiting. The main reason is that the manufacturing difficulty of the engine is too high.

"It is expected that ground testing will begin in January next year at the latest." Sun Aiguo gave an approximate time.

It is because of the engine manufacturing that it has been delayed. Of course, strictly speaking, this is already a light-speed fighter.

"If everything goes well, it will be finalized in the second half of next year, mainly the fly-by-wire system, which is our first time." Sun Aiguo didn't know why the fly-by-wire system was so troublesome, but Liu Hai said it was troublesome.

"We look forward to your good news."

"Let's go and see how the plane is!" The department leader couldn't sit still.

"Hey, the arched back of this plane looks a bit like a shark?"

A key person involved in the design of the plane explained: "Leader, this plane adopts a lifting body design with wing-body fusion, with a smooth transition to form a lifting fuselage. The front fuselage is slightly larger, which can accommodate larger and heavier avionics equipment, and the result of aerodynamic design optimization makes it have less resistance and better flight performance."

"This is mainly because my country still has some gaps with foreign countries in fighter radar."

my country has begun to keep pace with or even lead the world in large radars and ship radars, but the miniaturization of radars is still very slow.

Just like the anti-artillery radar that Liu Hai took out, that thing is big and is completely made of materials.

The radar on the ship can also be made bigger, because it is not a big deal for the ship to have an extra ton or two tons, but the fighter radar is not the same, and it is different if it has a few hundred kilograms more.

"In this way, our aircraft can see farther and hit farther."

The department leader glanced at Liu Hai standing next to him, and then said approvingly: "The design should take into account our overall equipment level."

"Theoretically, the combat radius of this aircraft can reach 1,600 kilometers."

"In addition, it has 10 hardpoints and a total load of weapons and equipment exceeding 8 tons."

The department leaders nodded when they heard this.

"I wonder if Fat Bear's Su-27 has been built? Don't let the two families collide by then, but my engine level is a bit higher than theirs." Liu Hai only heard the technician's introduction in his ears, but did not listen. Because I deal with them every day, there is no need to listen carefully.

Of course, after having this aircraft, it will be easier to develop carrier-based aircraft and the like in the future.

"However, building a carrier-based aircraft is also a headache. It must use a catapult to take off by ski jump, and it is impossible to use the maximum heavy load of the aircraft." However, Liu Hai's problem is that building a carrier-based aircraft also faces problems.

If a carrier-based aircraft wants to take off with full fuel and bombs, it must mount the catapult.

Liu Hai also had a headache when thinking about his teaching building No. 001, because there were too many systems in it.

The main thing is that I can't just throw out all the drawings, and before the drawings are taken out, the relevant technology must also be taken out.

That is, why is it designed like this and what is the idea behind the design?

Of course, in the eyes of some people, these systems in the 001 teaching building built by Liu Hai have not been verified, and there is no way to verify them now.

After the department leaders finished the visit, they gathered all the people involved in the project and gave a brief speech.

"Invite the main leaders during the ground test of the aircraft!" Sun Aiguo said to Liu Hai after the department leaders left.

"Leader, please look at the arrangements." Liu Hai nodded.

"I hope our fighter jet can succeed." Sun Aiguo let out a long breath.

"It will be no problem." Liu Hai didn't panic. Anyway, if it didn't work, he would just copy F18.

The bald eagle can use this as a carrier aircraft, but he can't use it?

There is something in place, so Liu Hai doesn’t panic at all. Anyway, if it fails, it will come again.

Of course, Sun Aiguo didn't know that bangs had a secret.

"Now you have one less job in hand, and you can spend more time with your family."

"The other two projects are also a headache." Not to mention the No. 001 teaching building, the difficult part of the liquid fuel rocket engine is the control system.

Although it sounds simple, there are too many things to encounter in practice, such as sensor accuracy, sensor position, control unit accuracy, etc.

One disadvantage is that it is easy to squat when taking off and landing.

The Liquid Rocket Butt Squat is very dangerous, and one downside is a big cloud of fireworks.

"You! You can go back early today."

"I'll go back early and call my wife first and ask him to get some good wine and food."

"Director, how about I give you some good wine?"

"I drink less now. I just drink once to feel happy. Drink less alcohol, live a few more years, and see more of the development of our factory."

"Okay!" Liu Hai nodded.