I don't know if there is such a supersonic tremor in the test flight of the MiG-23, if not, then the people have expected this problem when they designed it, and if so, they have already solved it with the most ingenious method now.

How to fix it? Let's look at the principle first.

At supersonic speed, the turbulent current pushes the rudder, swaying slightly from side to side, and reacts to the hydraulic oil, bringing instability to the oil pressure, and at the same time, the body also trembles.

The root cause of this is the flutter of the rudder, so now, simply balance it on the hydraulic oil circuit!

That's what hydraulic dampers are!

A damper is a device that provides resistance to movement and dissipates movement energy. The use of damping to absorb energy and shock absorption is not a new technology, in aerospace, aviation, military, guns, automobiles and other industries have long been used in a variety of dampers to reduce vibration and energy dissipation. (This sentence is from Du Niang)

Now, by simply connecting this special damper in series in the oil circuit, the oil pressure can be balanced and this vibration can be eliminated.

"What is this, our previous J-7 plane, without this thing, isn't it still good?" Lao Wang asked, as an expert in the hydraulic system, it is very strange that there is something he doesn't understand now.

"Mr. Gu, I suggest that we first remove the two hydraulic dampers on this and install them in our J-8 aircraft for a test flight to see if this fault can be eliminated." Qin Feng also has no temper with this stubborn old king, whether it has any effect or not, you will know if you install it.

"No, what if the oil circuit fails? Crashed the plane, who is responsible? Without scientific research, how can it be so indiscriminately referenced? Sure enough, Lao Wang continued to object.

"Then we only equip it in the main circuit, and in case there is a problem, we can switch to the backup oil circuit." Qin Feng said: "Let's install it tonight, and I'll fly tomorrow!" ”

Due to the lack of understanding of new technologies and the lack of test equipment, a large number of problems that should have been found in tests on the ground need to be verified by the actual aircraft, and it is necessary to rely on the courage of the pilot to face the danger to find the fault.

Qin Feng was mentally prepared, and now, he believed that he had accurately grasped the pulse, and he thought that his analysis and judgment were fine.

If there is a problem, it is a specific calculation problem, how much resistance is needed for the damper, how much oil pressure is in the operating system, these have to be calculated to know, this is a specific match.

However, in any case, as long as this vibration can be weakened after going up, it means that it is correct, and then it will be calculated and redesigned.

Anyway, the vertical tail of the two is about the same size, and it won't be too much of a problem to think about it, at most it is to switch to the backup oil circuit.

"Okay, I'm for it." Mr. Gu spoke: "I hope we can solve this damn problem." ”

Lao Wang's face was ugly, and he said loudly: "Let's talk about it first, if the plane crashes because of this problem, the responsibility is not mine!" ”

For Lao Wang, the most feared is to take responsibility, and now he has said ugly things in front, my hydraulic system design is good, and you have to modify it indiscriminately.

With that, he strode out.

Mr. Gu could only smile helplessly and said, "If something really goes wrong, I'll take responsibility." ”

After he finished speaking, he watched as everyone began to dismantle the two devices, and continued to distract from the nose of the MiG-23.

"Mr. Gu, our J-8 should have used nose air intake a long time ago, and now, with this MiG-23 as a reference, we can't delay it any longer."

Qin Feng has long seen that the nose of the J-8 has air intake, and it should have been changed to two sides of the air intake, as an interceptor, there is only so much space as the air intake cone to accommodate the radar, how can it meet the needs of air combat.

"What, Qin Feng, do you want to fly? I can report you to participate in the development of this modification. Mr. Gu said.

Qin Feng didn't answer, he was also looking at the nose of the plane, how good would it be if there was a mature fighter with air intake on both sides or belly.

Pity.

The technicians removed the damper and installed it on the tail of the J-8, and this improvement was tossed until dawn, and when they finished it, Qin Feng was also in high spirits and came to prepare for the test flight again.

"Qin Feng, be careful, if the problem can be solved this time, you are a great hero." Wang Yang said on the side.

"yes." Several others also said: "Fight for our test pilots!" ”

Everyone is a warrior in the sky, but in the past, test pilots really did not participate in the design and improvement of the aircraft, at most they just talked about the feeling of the test flight and judged for themselves.

Like Qin Feng, directly explaining the source of the failure, and even improving it together, is definitely the first, everyone admires him very much, don't look at him young, but it is everyone's hope.

"Don't worry, I'm flying to Mach 1.5 today!" Qin Feng said, strode up to the cockpit, and buckled his unique high-altitude helmet with goggles, but this helmet was too uncomfortable, and he didn't know when the domestic advanced helmet would be made.

After Qin Feng stepped into the cockpit, he turned his head to take a look and found that in the crowd, Lao Wang was actually there.

His eyes were bloodshot, obviously he hadn't slept well since he went back last night, and now the expression on Lao Wang's face was complicated.

As the developer of the J-8, of course he hopes that this fighter can be finalized as soon as possible and be able to defend the sky of the motherland, but if it is said that there is a problem with his design, his self-esteem feels greatly stimulated, and his heart is so contradictory at this time.

Lao Wang didn't sleep well all night, he got up early today, and watching Qin Feng step into the cockpit, his heart flew with this fighter.

As before, starting the two engines, Qin Feng skillfully piloted the fighter plane into the blue sky, climbed to 10,000 meters, and he took a deep breath.

"006 report, request for a test flight of the supersonic subject."

"It's okay to start, watch and see."

"006 Roger."

The afterburner in the tail opened, and with the feeling of pushing back, the fuselage of the J-8 fighter shuttled through the sky, piercing the sonic boom cloud and entering supersonic speed.

The corner of Qin Feng's eyes kept sweeping the Mach watch, Mach 1.1, Mach 1.2, and when the pointer continued to turn to the right, Qin Feng found that his heart was beating a little hard.

Closer, closer!