As usual, Qin Feng dressed neatly, stepped into the cockpit, and the ground crew followed, when he sat down, help him fix the seat belt, whether the cockpit canopy was locked, just when the cockpit canopy was about to be closed, the ground staff suddenly said: "Comrade Qin Feng, now in the entire test flight yard, the person everyone admires the most is you." ”

This is a young ground crew, with an innocent smile on his face, looking at Qin Feng, at this time, the cockpit canopy has been slowly closed, Qin Feng looked at him, and suddenly felt a burst of satisfaction.

Stick to what you should insist on and be your truest self, even if you offend someone? I am for the motherland and the people, and the words of this ground worker made Qin Feng's heart warm.

In the face of science, everyone is equal.

Qin Feng watched the ground staff go down and moved the gangway, after the ground crew left, he looked at him attentively, his eyes were full of admiration, so Qin Feng raised his hand and saluted him, and the ground staff was even more excited in an instant, and returned the salute.

The fighter plane started, slid onto the runway, and rushed into the blue sky.

After arriving at the predetermined airspace, Qin Feng looked at the various states in good condition, calmed down, and shouted towards the tower: "006 report, the height is ten thousand two, the speed is nine hundred, the request accelerates to Mach 1.6, and then enters the engine parking experiment." ”

"Roger, stay safe."

"006 understands." Qin Feng shouted over the radio and turned on the afterburner.

The fighter plane quickly sprinted into supersonic speed, Qin Feng took a deep breath, and then, it was up to him.

If he knows exactly what to do to get the engine to stall, then he's found exactly what the problem is.

On the ground, Lao Liu was still muttering: "Could it really be a problem with the air intake?" But why? ”

Next to him, standing was Lao Wang: "Maybe, it's true, I've already suffered a loss on the oil road, we designed a fighter for the first time, we have very little experience, there are problems everywhere, to be honest, although Qin Feng's words are ugly, so I can't get off the stage on the spot, but in hindsight, I have to thank this kid." ”

Just when everyone was chatting on the ground, in the sky, Qin Feng had already begun to continue maneuvering.

The speed reached Mach 1.6, Qin Feng pulled the operating stick violently, and all of them hugged the operating stick into his arms, and the fighter's butt fell to the ground at once, and his head was pried up.

Then, Qin Feng pushed the operating lever and kicked the rudder, his movements were the most violent, not as gentle as others at all.

Why is it not easy for others to stall the engine? Because they were all cautious when they operated, they were not as fast as Qin Feng's operation.

There is no shame in this kind of engine surge, and now the American F-14 Tomcat fighter has been in service for several years, and pilots are often warned to be careful with the engine, and if you are not careful, the engine will surge.

But at least people will never fail two engines at the same time.

The tail shuddered violently, and after a few clicks, sure enough, the loud roar was gone.

"006 reports, two engines stopped." With the experience of the last time, Qin Feng was not anxious at all, after the fighter engine stopped, he pushed the operating stick, and the fighter turned into level flight, slowly drifting forward.

At this time, Qin Feng didn't even restart the engine immediately, because he knew very well that he couldn't start it at this time.

The blue sky and white clouds outside made people's mood slowly relax, Qin Feng watched the pointer of the altimeter continue to slide, and at an altitude of two thousand meters, he twisted the button to start in the air.

There is only one chance, and if the air start is not successful, then he is left with only a parachute jump.

The roar of the tail was heard clearly.

Engine start in the air successful!

"006 reports, the experiment has been completed, request a second time."

Is it dangerous?

Of course, there is danger, and there is still danger in the flight of normal field troops, but Qin Feng is confident, he has already felt the law, he has mastered the skills, and he believes that he can control this beautiful man in the air.

"006, stay safe." The ground obviously discussed it for a while before deciding to let Qin Feng continue to fly.

Qin Feng pulled the fighter plane and climbed to an altitude of 10,000 meters, this time, it entered in the subsonic airspace, just like the time Wang Yang entered last year.

Keep circling!

Although the speed was not high, however, the nose of his plane kept turning, the air flow in the air intake tract became less and less, and the engine in the tail snorted a few times and stopped again.

After the second successful start in the air, piloting this J-8, Qin Feng landed lightly, and as soon as he stopped, there were already technicians who came up impatiently to copy the data.

Sixteen air flow sensors were added to the air intake, distributed in four circles, up, down, left and right, which faithfully recorded the condition of the engine before it was turned off.

When the data was displayed on the computer screen, the technician who analyzed the data couldn't help but shout: "That's right, that's right, it's true, the air flow inside is less than half of what it would normally be!" ”

"The engine doesn't get enough air, of course it stalls!"

"The further back it goes, the smaller the air flow, which is really the reason why the air intake is too long!"

Looking at these data, Lao Liu's face was ugly, and he knew that Qin Feng was right again this time.

In maneuvering, the nose turns sharply, and the air intake cone will play a counterproductive role, which will block the air intake of the air intake, resulting in a sharp decrease in the incoming air, and because the inlet is particularly long, the further back, the smaller the airflow will be, and when it comes to the engine, there is too little air, and the engine will naturally not be able to rotate.

This kind of air parking is not an accident, otherwise, Qin Feng easily entered the air parking twice, as long as the conditions are met, the air parking will happen.

Since it is not an accident, then this fault must be solved.

Then, then, a very important question came before them.

How to change?

Yesterday, Qin Feng put down his words, and if he wanted to change it, he could only change it to air intake on both sides.

The air intake on both sides, of course, will be blocked, and when you steer, you will be blocked by the fuselage, but at most only one, not all of them.

The belly air intake is the best, it will not be blocked when turning, it will not be blocked when climbing at a high angle of attack, and it will only be blocked when diving, but if you dive, are you still afraid that the engine will stall?

Therefore, when the fighter developed to the third generation aircraft, many fighters began to use belly air intake, and now the J-13 fighter secretly developed by 601 also has a version of belly air intake.

However, it is a newly developed aircraft, what to do with the J-8 in front of you?