"It seems that it is necessary for us to come this time." The meeting had ended, and Tu Lao sighed very much that night when he stayed in the guest house of the Navy compound.

This time, I came to seek support, and I can see that the comrades in the navy attach great importance to their own projects, which makes Tu Lao more confident, if the navy can purchase a batch, or even change it to a carrier-based aircraft, then the 132 factory will also gain supreme glory because of this, after all, carrier-based aircraft!

"I listen to the meaning of the navy, not only our J-7 to change carrier-based aircraft, does J-8 still have this idea?" Qin Feng asked towards Tu Lao.

"yes, don't you know?" Tu Lao was very strange and looked at Qin Feng: "You have participated in the test flight of the J-8, and you have been in Shenyang for so long, don't you know that the J-8 has plans to change to a carrier-based aircraft?" ”

Although Tu Lao has only been to the naval compound for a long time, after all, Tu Lao's status is higher than Qin Feng's, and his knowledge is more than Qin Feng's, and Jian-8 really has plans to change to a carrier-based aircraft.

"Don't say anything else, just Jianba's tall hanging tail, it's enough to choke." Qin Feng sighed, is this still how bold people are and how productive the land is?

"It is said that if the Jian-8 is on the ship, it will make a plan with a double vertical tail, so that the height will be reduced." Tu Lao said.

Qin Feng could only shake his head helplessly, it is not suitable for J-8 to go on the ship, but he can't object to anything, let's compete, there is always a good plan to come out, in short, in his own eyes, J-7 is definitely more suitable than J-8.

"Old Tu, I think that if we want to further improve our plane, it's time to do it on the wing." Qin Feng thought of what he thought of at the meeting today, and finally said this idea.

Tu Lao nodded: "Yes, this is also what I want to say, let's change the wing, it is urgent, the next stage of combat effectiveness improvement, mainly on the wing!" ”

I didn't dare to do it before, but now, I have to do it!

For fighters, the first one determines its performance, the second is the wing, the wing almost produces more than 90% of the lift, different wings, has a great impact on the performance of the aircraft, the characteristics of the wing, such as the lift-to-drag ratio characteristics, high-speed and low-speed characteristics, determine the general range of capabilities of the entire aircraft.

If you want to improve performance, you have to start with the wing and use new technology to modify it!

"I think the first thing is to add the leading edge maneuvering flaps." Qin Feng said.

In supersonic aircraft, in order to pursue high-speed performance, it is necessary to have low drag, so thin wings with sharp leading edge and relatively small thickness are generally used.

However, such a design has a weakness, flying at high angles of attack, the leading edge of the upper surface of the wing begins to create a separation of air flows, and the maximum lift coefficient is significantly reduced.

The leading edge maneuvering flap, as the name suggests, appears in front of the wing and can rotate downward, which increases the front curvature of the wing. In this way, the lift-to-drag ratio of the aircraft is greatly improved, the take-off and landing performance of the aircraft is improved, and the maneuverability of the aircraft at the high angle of attack is improved.

This technology, the West has long begun to use, such as the United States, the first generation of jet fighter F86 fighter used the leading edge slat, obtained an unparalleled advantage of horizontal maneuverability, on this basis, they continued to improve, to the second generation of jet fighter F104 used the leading edge flap, at that time it was still manually controlled, and when it came to the third generation, it began to be automatically controlled, relying on advanced fly-by-wire flight control, so that this flap can be automatically deflected, F-16 is an outstanding representative in this regard.

And what about domestic? Until now, there was no such thing at all, and the jets of the past were all about high altitude and high speed, and they just had to fly over it.

In order to control the separation of airflow, it is simply a few knives on the wings, and this kind of leading edge maneuvering flaps is something that you dare not touch.

Why?

"The hardest thing about this thing is the servo." Tu Lao said on the side, if it is simple, can you not use this technology?

On the one hand, the hydraulic action cylinders that push the flaps require high machining accuracy, if there is a burr or something, fall into the hydraulic oil pipe, maybe it will be stuck, on the other hand, it is this servo.

The servo is a hydraulic mechanism, the hydraulic oil goes in, the output of the deflection torque, drives the leading edge of the motorized flap to rotate, look at the position to know, the need for the servo to be quite thin, small in size, but the power is also large, which is not easy to achieve!

Finally, there is the requirement of reliability, and if reliability does not go up, then it will not work.

"Yes, there must be difficulties, but if we want to improve now, we can only face the difficulties, and besides, we are a foreign arms sales project, and we can find qualified foreign servos." Qin Feng said.

Make your own, there must be an imitation, first find a foreign one, your own use is suitable, and then survey and copy it.

Tu Lao nodded: "Yes, if this kind of technology is used, it will be of great benefit to the performance of our aircraft." ”

"As for the modification of the wing, we will definitely not be able to do it ourselves, or how about we join forces with the university?" Qin Feng said: "Let's find the Western University of Technology, the experts and professors there, to help us together and make a more advanced wing." ”

It's definitely not okay to go to 611 or something, people don't have time, you might as well find a university to cooperate.

If you want to find a university, Xi'an University of Technology is the most suitable, it was originally a specialized aerospace college, and now, in order to improve the performance of the J-7M, especially to remove the damn counterweight, it is already cooperating with Xi'an University of Technology, and now, you can just go to them and change the wing.

Different from other research institutes, the biggest feature of the 132 factory is that it is not bad for money, through the current export contract, the 132 factory has made a lot of money, has sufficient sources of funds, and has the courage to go it alone.

Tu Lao nodded: "Yes, we can consider it." With the change of the wing and the greatly improved maneuverability, this kind of aircraft will definitely be able to be sold. ”

Suddenly, Qin Feng frowned, making Tu Lao stunned: "What did you think of again?" ”

"Tu Lao, let's change the wing, we have to find other experts to work together, let's change the Jian-7 to the level they want for Lao Ba, you say, even if we are confident, can they rest assured?"

This is an important question, and Tu Lao was also stunned when he heard it, yes!

If it is Song Lao leading the team, there should be no problem, they surveyed and mapped the imitation MiG-21MF, directly from front to back, the whole calculation, know how to change, how you want to change, how to change, however, the design room of the 132 factory is not up to this level, although they are full of confidence, but, I am afraid that people have concerns.

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