Mach 1.24, the pointer is gently pointing at this position, in the past, the rudder pedals on the foot have been slightly trembling, and the fuselage has begun to shake.

And now, when the pointer points here, there is no feeling, and the plane continues to fly very smoothly!

"006 report, speed 1.24, everything is fine."

Qin Feng suppressed the excitement in his heart and shouted on the radio, and when he heard this voice, cheers immediately came from the tower.

That's great!

The last subsonic vibration has troubled everyone for several years, and this supersonic vibration has been solved in just one day, which is too efficient, if you encounter difficulties, you can easily overcome it as now, and it will be no problem to complete the finalization at the end of the year.

Qin Feng's heart was also full of joy, and the Mach watch pointer in front of him continued to deflect, and it had reached Mach 1.3.

The fighter plane was still flying smoothly, and no tremors were noticed!

At this time, although the rudder surface of the tail rudder was disturbed by the air flow, the internal damper firmly resisted the hydraulic cylinder, so that the cylinder continued to maintain a normal position, the oil pressure was stable, the rudder surface was normal, and there was no vibration!

"The speed has reached Mach 1.4 and everything is normal." Qin Feng continued.

"Accelerate to Mach 1.5 and return home." An order came from the ground.

Although Qin Feng wanted to continue the test flight next, he thought that the focus this time was to check whether the damper was working properly, so he accelerated to Mach 1.5 according to the instructions from the ground, and then turned off the afterburner.

The fighter plane crossed a curve in the sky, flying in the direction of the airport.

Lao Wang's mouth opened wide, and his mouth kept babbling: "Impossible, impossible, my oil circuit is fine, how is this possible?" ”

"Lao Wang, what's wrong?" A voice came from beside him.

"Lao Gu, you said, with such a small thing, it's really good? On our previous planes, we didn't have that thing. Lao Wang said.

"This Qin Feng, there are a few brushes, we all think that the nose has low air intake resistance, and the result? After the wind tunnel experiment, the resistance on both sides is small, and some people are still unwilling to accept this conclusion. Mr. Gu said.

Everyone is holding on to the original concept, so down, self-contained, how can it progress? Only by continuous learning can we move forward.

Everyone is old, and they can't learn anymore, look at Qin Feng, who has been constantly reading, enriching himself, and has always been aiming at the forefront of the world's aviation science and technology, and is also good at using his brain.

Yesterday, Qin Feng took everyone to find the MiG-23 and found the idea, which seems to be accidental, but in this accident, there is an inevitability.

"It's not that I don't want to accept it, I just think it's very..."

"What? You still don't want to accept that you are old, and the future belongs to these young people. Mr. Gu said: "Next, we need to carefully calculate from the data to see how the effect of this damper is, after all, we have to fly above Mach 2, and the road ahead is still very long." ”

Lao Wang nodded, watching the fighter plane return, he wanted to pounce on it to see, disassemble the tail, see how the damper worked, and whether there was any oil leakage, but he felt that his old face couldn't say goodbye to Qin Feng, so he slowly hid aside.

The fighter plane stopped, Qin Feng stepped off the plane, looked at the people who came up, and said: "Flew to Mach 1.5, it is very stable, we can continue to fly in the follow-up subjects, Mr. Gu, our finalization time is urgent, the task is heavy, I can continue to fly in the afternoon." ”

"Don't worry, let's see how effective this damper is, be sure to play steadily, don't rush in the slightest."

Qin Feng nodded and said: "We haven't fully understood the hydraulic operating system yet, but the Western world has begun to engage in fly-by-wire control now, a generation ahead of us, if we are on digital telex, such a fault would not have appeared, and even if it did, the cause of the problem could be found immediately." ”

Qin Feng always had a sense of urgency in his heart.

The operating system of the second-generation machine is hydraulic, at most, the pressure inside is high, so it is lighter to operate, but the third-generation machine has transitioned to fly-by-wire control.

Hydraulic operation, whether it is the operating lever or the rudder of the pedal, controls the oil circuit, and controls each rudder surface through the flow of hydraulic oil.

Fly-by-wire control, the lever and rudder control is an electric gate, which transmits an electrical signal, and the tail servo is also electric, so that once the rudder surface has an abnormal reaction, it can be directly known in the system.

The American F-16, the European Tornado fighter, and the Mirage 2000 have all begun to use fly-by-wire control, and in comparison, the fighters they have just developed are actually backward.

"Yes, our operating system is backward, but we are also carrying out pre-research, our test flight institute, there is a project of stabilizing the machine, if you are interested, you can learn about it." This voice is the head of the test flight regiment.

When Head Li said this, Qin Feng immediately became interested: "Stabilize the machine? ”

"The stabilizer is our term, in foreign terms, it is a telex-operated testing machine." Commander Li said: "Now, the world's third-generation aircraft are changing to fly-by-wire control, although our country is still knocking on the second-generation aircraft, but the technology of the third-generation aircraft must also be studied, so the test flight institute intends to develop its own fly-by-wire operation components and procedures on the basis of the J-6, and create an experimental platform for fly-by-wire operation." ”

On the basis of the J-6, transform a stabilizer? Qin Feng said: "I really want to go and see it." Where is the actual machine? ”

Qin Feng has read it many times in books, and he is also full of yearning for telex operation.

In the second-generation machine, if you want to accelerate, do you pull the throttle stick directly?

Pulling the throttle stick, the power increases, and the speed of the fighter is faster, but at the same time, the lift of the wing also increases, so if there is no rudder surface, the fighter is climbing.

Therefore, when the pilots of the second-generation aircraft transition to the third-generation aircraft, many old pilots do not understand.

You don't have to understand, the fighter just understands, you pull the throttle stick, then the fighter knows that you want to accelerate, whatever rudder will automatically move, the fighter continues to fly level, only accelerate, not climb.

Qin Feng really wanted to take a look, and even wanted to take a test flight.

"Our test flight institute has been thinking about it since 1976, but it has not yet been approved by the superiors, so it is all on paper, and I will take you to see it in the afternoon."