In order to solve this problem, everyone has racked their brains and strengthened the hatch in front, but now this problem still appears, the strength of the hatch is still not enough, what should I do?

Do you continue to reinforce?

It is impossible to go the old way, because now the reinforcement is already relatively strong, if you continue to reinforce, you will have to use more materials, resulting in a heavier place in the nose!

For fighters, once the shape is determined, the lift center is determined, the gravity center of the aircraft is also determined, the static unstable layout, these must be determined, the quality of each equipment, are determined in advance, now, even if the cabin door is not much weight, it will bring great trouble to the body, how to adjust is a big problem, so it is impossible to continue to use more materials to reinforce.

If you don't use more materials, you have to use stronger materials to increase the strength with the same weight, for example, with titanium!

With the development of fighter technology, the materials used are also constantly improving, at the beginning of the use of wooden skeleton, canvas skin, and then the entire fuselage outside is wooden skin, and later, it is a metal structure, aluminum alloy because of light weight, high strength, soon became a special aviation material.

However, as technology continues to advance, the strength of aluminum alloy is not enough, and now, many key components on fighters have begun to use titanium alloy.

Titanium alloy with light weight and high strength is more suitable for use as an aviation material than aluminum alloy, but at the same time, it is also more valuable and will significantly increase the cost of fighters.

On the Su-27, a lot of titanium alloy is used, and it is also used on the J-10 fighter, but it belongs to the position of the main force frame and the like, this small hatch, if it is also made of titanium alloy, it is too wasteful, right?

As long as there is a way, try not to use this means, if even a small hatch has to use titanium alloy, I don't know how many peers will laugh at it, right?

At the same time, this is not a problem of the hatch, if the hatch continues to be reinforced, the mass increases too much, then, the hydraulic lever responsible for the door switch, is it also necessary to replace it with a higher power? Otherwise, I'm afraid that the strength is not big enough, so if I continue to change like this, I will have to do more matching experiments.

The fault research meeting was carried out in the middle of the night, and all the technicians were frowning, and there was no good solution at all!

"Brother, you came back so late." When he returned to the dormitory, Qin Feng couldn't help but feel warm in his heart when he saw Qin Xue in his dormitory, cleaning up his bed and washing a lot of clothes that should have been washed.

There is a younger sister who is very sweet.

In the past, Qin Xue was also busy working, every day in the workshop, now, the plane has been assembled, she is finally relaxed, the next avionics test flight, mainly in the test flight yard, 14 of them will follow the fighter to the test flight institute.

So, it's been relaxing for a few days.

"Yes, today's failure, I haven't found a solution yet." Qin Feng said: "You should go back to sleep quickly, what about Zhiqiang?" ”

You're a man with a husband, don't always be here with my brother.

"You still have a bunch of magazines there, look at it, if it's useful, if it's useless, I'll sell it to you." Qin Xue said.

I cleaned Qin Feng's dormitory today, and I also found a lot of magazines, some of which are several years old, I don't know if Qin Feng is still useful.

Qin Feng glanced at it and quickly picked it up: "This is not good, these magazines are all my treasures, waiting to be taken to the test flight institute." ”

Where there is a house, there is a home, and the test flight institute assigned a house to Gu Tingting, so the home is in the test flight institute.

Qin Feng picked up a copy, the aviation magazine he bought a few years ago, on the cover of this magazine, is a beautiful Tomcat fighter, in the early years he went to Grumman, he also inspected this kind of fighter, and even fantasized about buying this fighter as the main fighter of his own air force, who would have thought that by mistake, the Tomcat did not buy, and the Su-27 became his main equipment.

Both kinds of fighters are very beautiful, and the movie of Top Gun was definitely popular all over the world.

Qin Feng took the magazine, glanced at it, and finally stared at the bottom, and suddenly, he couldn't help patting his head: "Found it, I found it!" ”

"What did you find?" Qin Xue is very strange, is there something wrong with his brother's brain?

Qin Feng was very excited, the magazine cover he was holding, the Tomcat fighter was filmed on the ground, the pilot handsomely held the helmet, stood in front of the left side of the plane forty-five degrees, shot up from below, and the blue sky and white clouds were set off behind, it was really spectacular, at the same time, he could also clearly see the landing gear of the Tomcat fighter, especially the landing gear at the front, only to see that in front of the hydraulic rod of the landing gear, there was a small horizontal hatch, and behind, there were two vertical hatches.

The landing gear in front of the Tomcat fighter is built like this! It is not directly split from both sides, but the top piece is made into a small forward flip structure!

If you use both sides directly, it is quite long, and it is precisely because of this that the aerodynamic torque is too large, so that this long hatch is always pushed backwards under air pressure, and even because it is too big, the hatch is finally torn off!

So, what if you change to the current structure?

"Brother, why are you going?" Seeing Qin Feng pick up this magazine and actually run out again, Qin Xue couldn't help but shout, it's so late, and he still wants to go out?

"I'll go find the old man!" Qin Feng said happily: "Today's failure, I have found a solution to the problem!" ”

"Can't you go again tomorrow?" Qin Xue asked.

"Can't wait!" Qin Feng had already run out in a hurry, because he knew that if this problem was not solved, there would be many people who would have insomnia today, and Song Lao would also not be able to sleep, so simply, tell Song Lao about his idea quickly!

"Old Song, Old Song, look at this!" Sure enough, Song Lao hadn't slept yet, and when he picked up the cover of Qin Feng's magazine, his eyes suddenly lit up.

"Our way of thinking, change it, just like this Tomcat fighter, let's have a 2 plus 1, so that we can solve the problem, and our recycling method is more appropriate, cut off this very long landing gear door, the front half can be directly fixed on the front landing gear, no tie rod, as long as the design is good, just can be blocked, and the second half is put away in a conventional way, so that the total length of the arm is shortened, and the rigidity of the door is improved. The lever doesn't need to be changed, and the hatch doesn't need to be reinforced! ”