Qin Feng inexplicably remembered the information he saw, the international flight test equipment has long been updated, such as the French one, transmitting data at any time, if the test flight institute can introduce this type of equipment, then the various states on his own plane, the ground can be intuitively seen, which is much more efficient than relying on radio communication as now.

After coming to the test flight institute, the plane was equipped with data recording equipment developed by the test flight institute, but these data still had to be flown back before they could be studied.

In other words, if the plane falls, the data will be gone, and in this case, it is still necessary to take any risk and drive the fighter back.

Qin Feng secretly made up his mind in his heart, and at the same time, he began to gradually reduce the throttle in his hand.

"The speed has been reduced to five hundred."

"The speed is reduced to three hundred."

"The speed is reduced to two hundred and four, and the operation is already very difficult."

While Qin Feng was operating the plane, he kept reporting that if he wanted to tailspin, he had to stall first and reduce his speed, which was one of the most common stalls.

"The speed is reduced to two hundred and two, and the nose of the plane is raised!"

As in the theoretical analysis, as the speed continues to decrease, the nose of the aircraft rises upward, the angle of attack increases, and it enters a stall state. Then, according to the plan, Qin Feng made a few wrong maneuvers, and the plane accurately entered the positive tail spin.

During normal flight, as long as it is not misoperation, it is impossible to enter the tailspin, and only when it is a fierce confrontation with the wrong operation, this special situation will occur.

As a test pilot, how to enter the tail spin is also a technical work, and when the plane entered the tail spin, Qin Feng took a deep breath.

Then, the world spins.

But it feels a little better than last time.

The last time the plane was upside down and entered the tail spin, and the head was on the ground, and the rotation of the earth would soon make people feel nauseous and vomit.

But this time, it is just entering the tail spin, the sky is still overhead, and at an altitude of 10,000 meters, there are no clouds, and there are no white clouds, there is no reference.

The physical fitness of the pilots is quite good, and after a few turns, they have adapted, and there is nothing to feel in level flight.

The J-7 fighter entered the tail spin, as if entering a huge whirlpool in the sky, spinning and turning downward.

At this time, Qin Feng had an urge to press the bar to the left.

If it can be judged that the plane is rolling to the right now, then the average pilot's knee-jerk action is to press the lever to the left to change the slope, which will only make the tail spin more powerful, and eventually cannot be cleaned up.

"006 has entered the tailspin, and the height is 10,000."

After entering the tail spin, you can't change it out immediately, but you also have to experience these feelings of entering the tail spin, and report it after you go back.

As a result, the fighter plane spun and fell in circles, and Qin Feng secretly stood up in his heart: "One, two, three..."

When he reached the sixth lap, he continued to shout: "The sixth lap tail spin, 8,000 height, ready to change." ”

With that, he let go of his hands and feet.

That's right, in this kind of tailspin, you can't change it according to the usual forward operation, because the height is still there, so the first experiment is to flatten the rudder and neutralize the rod, and if the tailspin can't be stopped, then press the rod.

The operating lever was released and was in the middle position, and the feet on the rudder also left to prevent misoperation due to tension, at this time, Qin Feng's body was pressed on the seat due to overload, his eyes were still staring at the various instruments, and at the same time, his mouth was still counting.

"Seven, eight, nine..."

"The height is five thousand, and it has not been changed, and it is ready to go down the pole." Qin Feng looked at the meter in front of him, and now he has turned fifteen times, and the flat rod still can't work, so he has to follow the rod.

Just after he finished shouting, suddenly, he felt that the plane was no longer rotating and began to dive downward, and he was suddenly happy in his heart: "The tail spin has been changed!" ”

The plane dived downward, the speed continued to increase, and when the speed reached 500 kilometers per hour, he pulled up the operating stick, and the J-7 fighter was like a tamed beast, obediently continuing to fly smoothly.

The first test flight was spent in such a dull situation, Qin Feng's mentality was very stable, but the people on the ground were sweating.

Although the theoretical analysis is very thorough, when you really fly, you have to take a great risk, and this is the gap between theory and practice.

Qin Feng verified this theory into practice and compiled it into the flight textbook, and in the future, when the pilots behind him were flying, they would know how to deal with this situation.

How much altitude, how many turns the plane has to turn, how much it descends, in order to successfully change out, this has examples to rely on.

And Qin Feng's test flight looks unremarkable, but in fact, it is frightening every step of the way, and he will encounter danger at any time.

Tu Lao and the others are even more anxious, if they don't fly the tail spin, their own plane has already been finalized, if they fly, they can't change it, but it will affect the stereotype.

Now, hearing that the test flight was completed and Qin Feng was returning, the eldest let out a long sigh of relief.

The nose of the J-7 fighter was raised and landed steadily in an elegant posture, which is definitely a perfect standard.

When I was in the 132 factory, every time I conducted a test flight of a major subject, countless people would come up to celebrate the success of this test flight, and in the test flight institute, perhaps thrilling test flights were often carried out, so after Qin Feng came down, it was also very common.

It's different from the scene in the sky, and it feels strange.

After sliding back to the tarmac, the ground crew opened the equipment compartment and copied the flight data for easy study, and the refueling truck also started up to refuel the fighters, and in the afternoon, the second test flight was about to be carried out.

Back in the conference room, Qin Feng began to report.

"This time, the level flight small watch speed into the tail spin, change out is very smooth, as long as there is altitude, then as long as we do not misoperate, the aircraft has its own ability to change." After Qin Feng finished talking about his feelings, he concluded.

Some aircraft, into the tail spin is not easy to change, or even can not be changed, some aircraft, in the design of the ability to automatically change the tail spin, although the MiG-21 has long been behind, this aspect is really good.

The flight data was entered into the computer at the base, and after analysis, everyone agreed with Qin Feng's point of view.

In the afternoon, Qin Feng's second test flight subject began, with high speed and high angle of attack entering the tail spin!

The test flight is boring, every test flight is as if it has been passed through from the ghost gate, and in the whole tail spin test flight, Qin Feng flew alone, felt it alone, and just like that, it flew for more than ten days.