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Chapter 775 Commemorative Medal

There is no need to explain the testing process in detail. The first Qinshan engine has been running for 600 hours. Although some minor problems occurred along the way, they were all solved one by one.

The first engine is now being disassembled and all components thoroughly inspected and then evaluated.

The original engine life of the Su-27 is 900 hours, the first overhaul time is 300 hours, and then it is completed after two overhauls.

Later, after our country introduced it, we successfully extended the engine life to 1500 hours, and the first overhaul time was 500 hours.

According to Feixiong's earliest engine production standards, a service life of 50 hours can be mass-produced. The early Rafale M88 engine was also mass-produced in 50 hours.

This is mainly related to the average combat life of aircraft during war. By the time Liu Hai traveled through time, the minimum standard for engine life was 4000 hours.

Liu Hai originally wanted to set the first overhaul time of the Qinshan engine at 1000 hours, but thought it would not be too conspicuous, so he set it at 600 hours, and then evaluated it after a comprehensive inspection of the parts during the overhaul.

Ordering a thousand hours yourself and ensuring that the service life can reach 1000 hours after inspection are two different concepts.

I set the goal of 1000 hours, but it feels a bit too advanced, so I'm going to be conservative.

Now that it has run smoothly for 600 hours for the first time, it is already considered a world-leading engine level.

In 2020, some engines even reached a full lifespan of more than 6000 hours.

Liu Hai estimates that his engine can also reach a full lifespan of 3000 hours.

The long life of the latter engine is actually related to various aspects of control.

The fully electronic system at the back can monitor the performance and temperature of every part of the engine.

Make timely adjustments to the entire system, such as the amount of fuel injection and other things.

Keep the engine in a good condition at all times, so the thrust of the subsequent engines becomes higher and higher, and their service life becomes longer and longer.

After all, the life of the material will be greatly reduced after exceeding a certain high temperature for a certain period of time.

Of course, the materials also have certain factors.

After a while, Sun Aiguo also came, and the deputy factory director in charge of military industry also came.

To be precise, this was not the first test. Liu Hai was staring at a notebook, which contained data related to the test. Liu Hai filled in each data as it came out.

These are all procedural things, and Sun Aiguo knows that.

Everyone at the scene felt a little nervous.

It was already one o'clock in the afternoon, but no one was worried about eating because the test was about to be completed.

Finally, at half past one, the person in charge of the testing announced that the test data fully met the factory standards.

At this moment everyone applauded. Although this was not the first engine, everyone knew that the plane was waiting for this thing.

"This is good news. Sorry for delaying your meal time. Please hurry up and eat." Liu Hai just then felt hungry.

"When will the assembly start?" Sun Aiguo asked.

"We will start assembly soon. The workers who are hoisting the engine have been waiting for a long time." Liu Hai said.

"If everything goes well, we can install both engines today." Liu Hai did not say that the first engine shipped out of the factory should be installed first.

This is not possible. On the one hand, the assembly process does not allow it. On the other hand, the weight of an engine will cause changes in the strength of the internal structure if it is hung on one side for a long time. No one can explain this situation clearly.

So the two engines are installed together during hoisting.

In this regard, Liu Hai has drawn on the design experience of some fighter jets on aircraft carriers.

While Liu Hai was having his meal, the engine had been packaged and sent to the lifting workshop.

Although there is not much distance between the two, it must be done.

This is a question of responsibility from one department to another. Whoever dares to say that this is not packaged will be held responsible if problems arise during transportation.

Liu Hai, Sun Aiguo and others changed into new work clothes and had a quick bite to eat at noon.

The work of lifting the engine has been simulated and trained many times.

All the staff members looked at the two engines with shining eyes. The person in charge of assembly command also took a deep breath and gave the order.

An engine is placed on a special cart.

The trolley pushes the engine directly under the aircraft and then lifts it up.

Because it is the first actual operation, it is a little complicated. The engine needs to be transported to the right place and checked before continuing to lift the engine. After the engine is lifted into place, it needs to be checked again before moving to the next step.

The same applies to connecting various pipelines.

One person operates, one person checks, one person supervises, and one person is responsible for registration.

Who operated this project? Who checked it? And who supervised it?
Although the process is a bit complicated, it is the first time to actually do it.

Of course, when it comes to later maintenance, most people will follow this, because an engine is not cheap.

Of course, there is no need to do this in an emergency. As for how their ground crew will be trained later, this is none of Liu Hai's business.

Because actual training may be somewhat different from current operations.

However, in Liu Hai's opinion, he would rather wait one more minute than rush for it, because if he rushes for it, no one knows what will happen.

There's no need to have a time-shortening competition to see who's the fastest, because if something goes wrong it'll be a huge problem.

Liu Hai and Sun Aiguo did not interfere in anything and let the people on the scene handle it themselves.

Complete all the steps and the installation is complete.

"You won't be able to catch up with the news when you go home, but you can watch TV series." When the assembly was completed, Sun Aiguo saw Liu Hai finish signing, looked at the time and said with a smile.

"Then let's get off work." Liu Hai laughed and said that he would definitely not be the only one to come tomorrow to witness the appearance of the new generation of fighter jets and conduct ground tests.

"Then let's get off work." Sun Aiguo also nodded.

Liu Hai felt a little nervous and excited at the same time, as the results of his exam would be announced tomorrow.

I was so excited that I couldn’t sleep at night, so I cooked several dishes with my junior sister. Liu Hai went to work the next day in high spirits, but my junior sister was listless. She found an excuse to sleep at the company all morning, mainly because her children were on holiday and she felt embarrassed to sleep at home.

More people came the next day, including the main leaders, after all, it was our country's new generation of fighter jets.

"Mr. Liu, nice to meet you again." When the main leader came, Liu Hai and his people were waiting. The main leader first greeted Sun Aiguo, and then went straight to Liu Hai.

"Hello, leader." Liu Hai shook hands with a smile.

"This is your territory, you do your job and we are just spectators." The main leader then spoke. In fact, this sentence was also said to other leaders, telling them to shut up no matter what happened.

As the factory gate slowly opened to both sides, the twin-engine heavy fighter J-10 made its official debut.

Of course, at this time, the fighter planes were all yellow-skinned, that is, a layer of protective material was applied on the outside of the fuselage, because during the flight test, the fuselage would inevitably be contaminated. When the paint is applied later, the surface of the aircraft is polished and then the paint can be applied.

In addition, the wear of this material on the aircraft surface can also tell where the wear is most severe.

Because when an airplane is flying, there is always a place where the resistance is the greatest.

This was the first time for many leaders to see the shape of this aircraft, especially the high arched back.

"This fighter pilot must have great vision!"

"That's for sure."

"It can be seen from all directions." Many leaders whispered when they saw the fighter jet.

"Twin-engine heavy fighter, tsk tsk!"

"It is said that the combat radius can reach 1600 kilometers."

"1600 kilometers is enough!"

The combat radius of a fighter jet can be divided into many situations.

There is the combat radius with the tanker, and there is the combat radius with the support of auxiliary fuel tanks.

In addition, the bomb load is also important. Generally, the fighter jet is not fully loaded during training because a fully loaded fighter jet is very dangerous.

Especially in terms of ammunition, some ammunition may have problems during landing.

Normally, the flight is just like a civil airliner, with a safety amount of fuel added to the required fuel consumption.

Moreover, most fighter jets’ ammunition training uses simulated bombs.

Although the weather in Kyoto today was chilly and windy, everyone present was filled with excitement.

On the one hand, this fighter jet itself brings surprise to everyone, and on the other hand, this fighter jet was created by Liu Hai.

If other factories were to produce fighter jets, their leaders wouldn't have such great confidence because they wouldn't necessarily have such excellent designs.

But Comrade Liu Hai is different. The actual products he manufactures are often better than the designs.

Although the wind was cold, the sun rose as usual. Today was a rare sunny day. The plane moved to the runway in the first rays of sunshine in the morning.

Everything in the plane was filled except fuel.

The vehicle is used for refueling, because the amount of oil in the ground taxiing test is also different according to the test content, and the weight added is different.

Liu Hai designed a twin-seat, twin-engine heavy fighter. Historically, we imported single-seat ones in the early days, and introduced twin-seat ones later.

The two pilots climbed into the plane and sat in the cockpit according to the procedure.

The two pilots also had a notebook in their hands and followed the steps on the notebook.

At this time, the leader, Liu Hai and others had already arrived at the warm tower, where they could look down at the yellow fighter jets on the runway.

The tower here can also command aircraft landing, but most of it is used for flight tests and aircraft factory testing.

The tower was replaced by a professional test commander, who also had a notebook in front of him.

Both parties followed the steps in the book, one step at a time.

After one engine of the fighter jet was ignited, the pilot reported all the engine data, and then started the second engine under the command of the tower.

The two engines were ignited and the test pilot reported various data of the two engines.

Then, under the command of the tower, we started taxiing on the runway, which had been cleared long ago.

When the fighter jet glided in a circle along the predetermined route, of course slowly at the beginning, it returned to the starting point.

There was warm applause in the tower.

"Congratulations, congratulations!" said the main leader while clapping his hands.

"This is the joint effort of all of us," Sun Aiguo said modestly.

Ground testing of the fighter jet is further complicated because this one uses fly-by-wire mode.

During the first ground taxiing just now, no unnecessary movements were performed. After a preliminary inspection, we refueled and immediately started the second ground taxiing.

This time the fighter ran two laps and began to consciously increase the throttle.

The two test pilots found that the fighter had an excellent field of vision, just like sitting on the back of an airplane, which was completely different from other fighters.

"The view is simply unbeatable, coupled with the bubble-shaped cockpit." The two test pilots felt for the first time how comfortable it was to look at the scenery from inside an airplane, even though everything outside was withered now.

Test pilots have flown many aircraft, not to mention civil airliners, where the field of vision is very narrow.

Don’t even mention the previous fighter jets. Compared with the field of view of this fighter jet, they are nothing more than little brothers.

And the pilot can see the various conditions of his aircraft, such as wings and tail.

After completing the three ground tests and it was almost noon, everyone took a photo together.

Of course, the fighter jet's maiden flight has yet to be finalized, which will take some time.

Liu Hai got another commemorative medal today. Liu Hai will not participate in the subsequent tests because he just follows the process and takes it step by step.

It can be said to be quite boring, testing over and over again.

However, I will definitely go when the ground test is completed and the first flight is completed. But it is expected to take at least one month. During this period, the main task is to test the performance of various aspects of the aircraft, as well as the control, etc., especially the fly-by-wire control program.

Liu Hai had a day off in the afternoon. This year is considered to be a relatively late day off. Of course, others who participated in the ground testing of the aircraft didn’t have to think about having a day off.

After a certain period of ground testing of the aircraft, the entire aircraft must also be inspected and maintained.

The news media did not report on this incident because it is only a ground test.

Moreover, the internal testing site of the motorcycle factory is not visible to outsiders, unless someone sees it when the aircraft flies every day.

"What happened?" the junior sister asked after returning home in the evening.

"It's a temporary success. Please keep this for me." Liu Hai took out today's commemorative medal.

When the junior sister saw Liu Hai’s commemorative medal, she was so happy that she couldn’t close her mouth. She kissed Liu Hai and took the medal to the study.

The junior sister specially found a place to put Liu Hai's commemorative badges. Looking at so many commemorative badges, the junior sister admired him even more in her heart. She thought of the first time she knew that her senior brother was so capable because of an aircraft test.

My junior sister participated as a paramedic that time, just like today's fighter ground test, there are many people on standby, including the fire brigade, ambulance doctors, etc. These people are silently on standby. Of course, there are more people, such as the Air Force and civil airliner flight routes, to prevent anyone from snooping into our secrets.

(End of this chapter)