Because the runway is not long enough, in order to be able to complete the acceleration in the shortest distance, Qin Feng extravagantly turned on the afterburner to carry out, under this operation, the thrust of the tail is too strong, he pulled the operating lever, originally wanted to look up, but if he looked up, the thrust of the engine would go down, and it would blow to the ground! This reaction force hinders the aircraft from raising its head, that is, the aircraft cannot be pulled up, not because the head-up moment is not large enough, but because under the action of the powerful thrust of the aircraft's engine, an additional head-down moment is generated!

Just when he was testing the flight, he could clearly feel that the plane wanted to lift up, but as soon as it was raised, there would be a reaction force on the tail, which hindered the plane from continuing to raise its head!

If it is in a formal flight, this problem does not exist, pull up the nose and wait for the speed to continue to increase, the greater the speed, the greater the aerodynamic torque of the rudder surface, and finally the nose will definitely be able to, but not now, their runway length is limited.

If you go to the test flight institute, this will definitely not be a problem, but now that you are here, it is really a problem, how to solve it?

Qin Feng was completely awake, at this time, the sky outside had just begun to turn white, Qin Feng's mind was constantly pondering this problem, he couldn't pull the plane up, because the thrust of the engine was too strong, so what if I reduced the thrust of the engine?

Qin Feng thought about it, he felt that he had found the trick, yes, he could try it like this!

Do you want to talk to Song Lao?

Don't use it first, after all, you haven't calculated it, at this time, the theoretical calculation may not be easy to use, try it yourself, if it succeeds, and then talk to Song Lao.

The most important thing for high-speed gliding is to verify the head-up, but there are other data to be obtained, so we will continue to carry out high-speed gliding experiments today.

Everyone's head drooped, their eyes bloodshot, obviously they hadn't slept well last night, they must have been studying the problem.

"Let's skate twice more today, if it doesn't work, we have to pull it to the test flight yard, there is no other way." Old Zhou said to Qin Feng.

"yes, I see." Qin Feng said: "I will try my best to fly." ”

Stepping into the cockpit, as before, Qin Feng started the engine, and in the roar of the third uncle, Jian-Shi began to rush forward.

Everyone is recording data, looking at the data transmitted by the TM system, and analyzing every detail of the plane's taxiing. Qin Feng flew several times yesterday, but he didn't pull it up, and last night they had a meeting until midnight, and they didn't discuss a solution, so today, they are already at a low point.

Qin Feng is still full of confidence, just like yesterday, the numbers on the flat display are beating rapidly, when the speed reaches one hundred, Qin Feng quickly turned off the afterburner with his left hand, and at the same time pushed the throttle lever to the position of the slow car, and then, the right hand pulled the operating lever back, so pulled, in an instant, I felt that the horizon on both sides had changed, and my front was no longer the earth, not the runway, but the blue sky, and the nose of the plane was raised, raised!

"What's going on?" At this time, Song Lao on the ground saw it first, his eyes widened and his mouth widened, impossible, right? How did the plane lift its front wheels?

The front wheels have been off the ground, and the fuselage has an angle of about ten degrees between the ground and the ground, sliding forward steadily, this speed is not fast enough, it is just about a hundred, how can it be pulled up?

This shows that the aerodynamic layout is no problem, and the head-up torque is absolutely sufficient, and the key project of this high-speed glide has been verified.

The plane is up!

The other people also discovered this scene, and their eyes widened one by one, at this time, if the movie was slowing down, you could see that the Jian-10 fighter was like a duck, spreading its wings and fluttering, and all the technicians at this time were looking at the fighter with incredible eyes, and their hearts were full of infinite expectations.

How does it work? What's going on?

Taxied forward for more than ten meters, Qin Feng pushed forward the operating lever, and the nose of the plane fell again, making steady contact with the ground, because the speed was not so high, so even if Qin Feng did not release the parachute, just stepped on the brakes, he could steadily stop the fighter.

At the end of the runway, the J-10 fighter stopped, and the technicians were already trotting to this end, looking at Qin Feng above, everyone was incredible: "Qin Feng, how did you lift the plane?" ”

I? Qin Feng wanted to say that he thought about it for half the night last night, and he thought about it for a long time in the morning, if he wanted to say this, it would be a bad rest, and if he didn't rest well, then he couldn't test fly.

"My hands shook a little." Qin Feng said: "Turn off the afterburner, and it has reached a slow state." ”

Qin Feng spoke half-jokingly, and his joke spread quickly, Qin Feng's hand trembled, and as a result, a big problem of test flight was solved, if there was no hand trembling, then the J-10 fighter would have to be disassembled and sent to the test flight institute!

Now, the problem is solved!

"That's right, our thinking is wrong, thinking that the speed is not enough, resulting in the front landing gear can not be lifted, in fact, because the power of the engine is too strong, resulting in too much head torque, so, after the speed is reached, reduce the speed, you can lift the landing gear!" Song Lao deserves to have studied the aircraft all his life, and soon understood the meaning of such an operation, and said it in an instant.

After speaking, he looked at Qin Feng: "Qin Feng, choosing you as our chief test pilot is really the right choice!" ”

"Great, we can continue our experiments!" Zhou Lao also came up and said to Qin Feng: "I really didn't expect that this problem could be solved like this!" That's great! ”

Although Mr. Zhou has always suggested going to the test flight institute, it is also because he feels that it is a waste of time here, and now that it has been solved, the follow-up projects can of course continue to be carried out here!

Qin Feng's hand trembled, how much does it mean? At least a month saved, millions of dollars saved! The haze that shrouded everyone's hearts was blown away like this!

"I have a bottle of 30-year-old Moutai, I want to call immediately, find someone to bring it, and drink it!" Just then, another person shouted.

The J-10 project is of great significance, not only technical personnel came to participate in the test flight, but also many leaders, today at the scene, there is an old leader from the headquarters, looking at this scene, it is also quite excited, this is a good thing worth celebrating!