This pole, the most direct is to use a round tube, yes, the second one, is the cross-sectional shape of the pole, originally this is an air refueling tube, is it so complicated to use? In order to save trouble, it is good to use a round pipe directly, and no one knows that the problem of this noise is that the round pipe comes out.

The last problem is the selection of the position of the refueling pipe, the space on the nose is not large, the front is the radar, the back is the cockpit, it can only be selected somewhere between the radar and the cockpit, however, the selection of this position, there is still a lot of attention, first of all, the position of the refueling pipe relative to the engine air intake, the farther away the better, because this pole, to interfere with the air intake!

For J-8, this kind of interference is no way, because its air intake is on both sides, and J-10 is different, J-10's air intake is in the belly of the aircraft, the refueling pipe is poked on the nose, it doesn't matter which position, plus J-10 is fly-by-wire control, so, the operation is very flexible, and it is very difficult to refuel in the air on J-8, and it becomes very easy to get on J-10.

Now, we need to continue to study before we can find the problem.

"Yes, we have to study these issues carefully." The chief engineer of the aircraft said: "Although there are many problems in front of us, we believe that these problems will be solved one by one." ”

Finding problems, studying problems, solving problems, these are the steps of test flights, of course, it is easy to find problems, but it is not easy to study and solve.

The second test flight was carried out three days later, and when Qin Feng changed into his flight suit in the pilot's preparation room, he carried a new flight helmet in his hand.

In fact, many pilots like this kind of leather flight cap, which has a feeling of being a World War II pilot, but soon, the flight cap is outdated, after all, this kind of flight cap cannot provide enough protection, and pilots began to use flight helmets.

The first generation of standard flight helmet is TK2, which is a sky blue flight helmet, made of fiberglass, heat insulation, sound insulation, impact resistance, anti-shattering, printed with a red five stars, the edge of the shell is sewn with sheepskin, and three shock-absorbing pads are used inside.

After that, this flight cap has been continuously improved, and now a large number of people are used, it is already TK 2A, in appearance, the biggest difference is the color, this flight cap is white, it is still made of fiberglass, but its volume is larger, so that it is more comfortable to wear, and the inner latex sponge layer is thickened by 3 mm, so that the thickness of the whole liner reaches 20 mm. Of course, when doing a big overload maneuver, it is even more uncomfortable to wear this thing.

Now, what Qin Feng is holding in his hand is the latest model that has been improved, codenamed TK10 flight helmet.

This kind of helmet is specially developed for the J-10, for the domestic third-generation aircraft, all kinds of supporting equipment, have also been updated, this helmet from the appearance, compared with the previous helmet, the hemispherical underneath, did not shrink back, and even expanded outward.

What is it for?

Of course, it's for the part of the ear, here is the shell ear protection part, after expanding outward, the space inside is larger, of course, it is very smooth and rounded, and it looks more beautiful.

The inner sponge is thicker, and when you wear it, a better effect is that it can greatly reduce noise.

In combat, the noise is quite strong, so to speak, and in the chainsaw factory is not much different, the noise of the tail engine, is a high-decibel chainsaw machine, for the pilot, the less noise in the ears, the better the protection of hearing, and at the same time can better complete the task.

The pipe outside is noisy, how to solve it? Noise-canceling headphones, this idea to solve the problem, is also going around in a circle, now, that tube is not easy to solve, so just wear a helmet with good noise cancellation performance first, and continue to fly up.

Qin Feng was neatly dressed and walked out of the locker room, and when he went out with his helmet, he found that many people around him were watching him.

Everyone's eyes were full of concern, Qin Feng knew why, since the last accident, in the past few days, the test flight institute has been very quiet, and no new test flight tasks have been arranged, and today's test flight is equivalent to the first time after the accident, and everyone hopes that they will come back safely.

This is nothing, when the fault analysis of the J-7 is completed and the re-test is completed, the J-7 is also going to fly back to the fly, and Qin Feng has long been psychologically prepared.

And when Qin Feng walked to the plane, he turned his head back, and saw a person standing there quietly in the grass below.

Gu Tingting.

In the past few days, the entire test flight yard has been immersed in sadness, Qin Feng's mood is not high, after returning home, Gu Tingting and Qin Feng got along very peacefully, and they didn't even communicate much, deliberately avoiding this topic, and today, when Qin Feng stepped on the plane again, Gu Tingting came to see herself.

Qin Feng knew what she was thinking, she knew the risks of flying, but she would not stop herself, because test flights were her own career, so she could only watch there and look forward to it.

Qin Feng's heart swelled with an inexplicable emotion, he suddenly stretched out his hand, beckoned his wife, and shouted: "Let's go pick up the little tiger head together at night!" ”

For Qin Feng, he knows how high the risk is in flight, but he wants to give his lover a sense of security, please rest assured, I will definitely come back safely!

Qin Feng stepped on the plane, retracted his thoughts, and then methodically made preparations before takeoff.

Looking at Qin Feng's appearance, Gu Tingting's heart was full of various feelings of ups and downs, this person, only caring about flying, forgetting everything, Xiaohutou has been on vacation, and now he is at home, he has actually forgotten about this matter in the past few days!

Just thinking about it, she felt someone behind her pulling her hand, and when she turned her head, she saw that it was actually a little tiger head, this little ghost, who secretly ran here alone!

Gu Tingting hid the little tiger head behind her body, for fear that Qin Feng would see the distraction, and at this time, Qin Feng had already entered the flying state.

Start the engine!

Hey, why didn't you hear the sound of the engine, didn't it start successfully? Qin Feng looked down at the engine tachometer, but the speed was steadily rising.

Well, it seems that the sound insulation ability of this new helmet is really good, now, there is no need to worry about noise, if you don't consider noise, how fast can it fly?