Song Shangcai was not a big man just now, and after obtaining permission, he carried out a set of flight maneuvers that were not too overloaded, but could occupy all the control elements of the aircraft.

Only about ten minutes passed, and the operational characteristics of this aircraft were basically figured out.

Although it is not as perfect as the flight controller, it is definitely no problem to carry out the normal test flight subjects according to the plan before takeoff.

"Report to the command center, flight tests can begin."

The calm voice on the radio, and the normal flight trajectory on the radar, all breathed a sigh of relief.

"Roger!"

The commander, who was sitting in front of the radar monitor, replied only a few words.

The test subjects of this flight have been memorized by the test pilots before takeoff, and the key route data of several core projects have been entered into the flight computer, so there is no need to confirm each flight action to the ground as before.

Therefore, at the same time as the situation was reported just now, Song Shangcai had already put the throttle stick to a relatively low position and began to test the flight boundary of the engine on the left little by little.

At an altitude of 6,000 meters, whether supersonic or subsonic, there is actually nothing to measure in level flight, mainly depending on how much performance can be maintained under some practical working conditions.

As a result, the plane was soon deliberately manipulated into one of the later test subjects.

Soon, Song Shangcai in the cabin felt from the numbers on the tachometer, when the air intake state was destroyed, the pointer on the left side was obviously more stable than the right side.

You know, the AL31F is already known for its high adaptability and endurance, and this turbofan 10 even performs even better in this regard......

Of course, he still understands the principle of step-by-step, such as large sideslip angles, as well as large angles of attack, which are more anti-natural data, naturally it is impossible to measure them during the first flight.

The first flight, the project is mainly shallow and complete.

And judging from the current results, with the current state of this aircraft with a single-engine turbofan of 10, it is likely that the real limit cannot be measured-

The reason why the AL31F on the right was kept was originally to be a guarantee.

In this way, if something happens to the test engine in the sky, it will not lose all power and power, and the plane can be brought back.

This is also a common practice in countries when testing new engines.

However, judging from the state of this test flight, Song Shangcai is basically sure that the guaranteed engine limits the upper limit of this aircraft......

"We'll have to wait until we get the new model for both engines......"

He still felt a little pity in his heart.

"Report to the command center, the 6000-meter altitude test has been completed and is ready to climb to the next test altitude."

It was still just a routine report, so while he was talking, he had already pulled back the joystick, allowing the plane to pull up the nose and start climbing.

"Roger, pay attention to fuel consumption."

The tower's response was heard over the radio.

Originally, according to the calculation, the light fuel brought should be enough to complete the test subject, but if everything can be calculated accurately, then there is no need for a test flight, so you should be careful in the sky.

Soon, the aircraft jumped to the second test altitude of 8,000 meters.

This time, Song Shangcai was obviously more familiar with the road, and the same few subjects as at 6,000 meters were completed in almost half the effort compared to before.

And then naturally, 8,000 meters, 10,000 meters......

The theoretical maximum ceiling of the J-11 is around 23,000 meters, but the turbofan is not as good as the turbojet in principle in the high-altitude environment, so the maximum ceiling of the second-generation aircraft is basically really able to fly and has practical combat significance, while the maximum ceiling of the third-generation aircraft is relatively virtual, especially the design of the central lift body type.

Therefore, according to the plan, this test flight will only be carried out at most to the practical ceiling, that is, 18,000 meters will be aborted.

But.

As mentioned above, if you can calculate everything accurately, then you don't need to test fly.

When Song Shangcai manipulated the No. 1010 aircraft to an altitude of 16,000 meters, he found that the plane, which had become more and more handy in his hands, once again did not obey the call......

And it's much more serious than it was at the beginning.

It's not a lot of pressure to maintain level flight, but if you make a little bit of a big move, the plane will go into all sorts of strange attitudes.

Although it can be changed later, this situation is obviously no longer suitable for continuation......

So he immediately switched back to the original safe mode.

Removing the safe mode even requires entering a string of passwords, but switching back only requires a single key.

The attitude of the aircraft quickly returned to normal.

Only then did Song Shangcai realize that after reactivating the integrated control of flight thrust, the speed of the engine on the left side suddenly dropped by nearly one-third compared with just now......

In other words, at an altitude of 16,000 meters, the turbofan 10 on the left side has almost a third more thrust than the other engine with the same throttle opening......

"In the command center, the envelope at an altitude of 16,000 meters cannot be tested, and it is currently judged that the thrust gap between the engines on both sides is too large."

After barely suppressing the shock in his heart, he took a deep breath and said on the radio.

During the test flight process, no one can judge what will happen in the next second, so as long as the demonstrator or prototype leaves the ground, it is the test pilot who is the biggest.

Therefore, neither Chang Haonan nor He Ming can and will not interfere with Song Shangcai's decision.

Not to mention the flight commander.

"Roger, ready to return."

Although there are still two altitudes in the original test subjects that have not been carried out, as the first lift-off test of the new aircraft, it is now obvious that the task has been exceeded.

Furthermore, the two heights were not completed because the engine was not good, but because it was too strong......

After a burst of cheers, a technician in charge of archival paperwork quietly approached Chang Haonan:

"Mr. Chang, this test flight log...... How do you write it? ”

The latter was stunned for a moment, and immediately understood what the other party meant.

In any case, this was an unexpected abort of a test flight.

Logically speaking, if a problem is found, a follow-up failure analysis meeting should be held.

But this time the situation is ...... Obviously, it's quite different from before.

"Just write it truthfully, but you don't have to be so rigid."

After a moment of thought, Chang Haonan replied:

"Just note at the end of the situation that the reason for the suspension is that the test engine is too strong to maintain the balance of the demonstrator."

There is a sense of déjà vu in college when you dunk a rebound and then say you can compensate for it, but the school has to report the criticism and publicize it for a month.

The other party immediately understood, nodded his head, and then stopped talking.

Although the test flight process just now took a long time, it was actually in the airspace around Shengjing all the time, and it would not fly far, so it was actually fast to return home.

Therefore, with the exception of the necessary flight command personnel, the rest of the people quickly left the control center and prepared to meet the triumphant pilots as is customary.

Luo Shida originally followed behind, but when he saw He Ming not far away, he quickly stepped forward and came to the latter's side:

"I said Xiao He, this Comrade Haonan definitely looks less than 40 years old, and when this project is completed, he will probably become the youngest academician in our country, right?"

"Uh......"

Hearing that the first half of the sentence was outrageous, but the second half was a bit of a reasonable judgment, He Ming didn't know where to start for a while.

After a long moment, he replied:

"Mr. Chang...... I guess it will definitely be the youngest academician in our country who didn't run. ”

"But he's ...... now I'm only 25 years old, and if I finish the entire turbofan 10, I can't exceed 30 ......."

He originally wanted to say that it was still possible for an academician who was less than 40 years old, but it was too outrageous to be less than 30 years old.

But the things related to Chang Haonan in the past two years were outrageous, and it was not bad for this one, so he held back his firm words.

And Luo Shida, who was next to him, suddenly felt that something was not right-

Chang Haonan has been wearing old-fashioned overalls these days, and he doesn't care much about trimming, so he has always felt that the other party is a young talent who is thirty-five or sixteen years old but has a young appearance.

As a result, he is only twenty-five this year, and he is still a young talent......

Ten years ago, he was fifteen years old......

Obviously, there seems to be something wrong with his speculation.

"Comrade Haonan is twenty-five years old this year...... So the current version of the Turbofan 10 was the first to start...... Not his responsibility? ”

Luo Shida asked with a strange expression.

He Ming shook his head directly:

"How could it be, it was from the beginning."

Luo Shida was directly shocked:

"Wasn't he a kid when he first started working on the project?"

"Two and a half years ago...... Even if it's twenty-three, it shouldn't be considered a child, right? ”

At this time, He Ming's attention was already on the plane in the distance that was constantly decreasing in altitude, and after answering, he accelerated the pace of his feet.

Leaving Luo Shida alone in the wind.

"It's only been two and a half years......

(End of chapter)