Ultra-low altitude is to stick to the ground, so that the enemy's radar is not easy to find, and at the same time, the speed must be high, the higher the speed, the easier it is to arrive in the shortest time, this is the actual meaning of low-altitude and large-speed penetration.

But now, there is this problem, we want to fly at low altitude and large speed, then we have to keep pushing the operating lever to overcome the lifting torque of the fighter, and now the test flight is OK, if it is in the war period, it is really necessary to do this, is it still pushing the operating lever? Can that arm still stand it?

This is Qin Feng's question, and now, this question is also shrouded in everyone's minds, yes, how did the West do it?

That's a real problem.

No one knows, whatever, what does this problem have to do with you, in short, you will complete this test flight first!

Qin Feng originally thought that adjusting the small arm was a very simple task, but who would have thought that in order to adjust this small arm, he actually needed to lift the two turbojet-7 engines in the tail down.

A small adjustment became a big project, and it was not until the third day that the task of adjustment was completed.

At this time, the bruises on Qin Feng's arms finally dissipated, as if he was waiting for the bruises on his arms, and now, Qin Feng sat in the cockpit again and took off!

On this day, the weather was not too good, although the visibility was okay, but the wind was a little strong.

"Can you fly?" Mr. Gu couldn't help but be a little worried, those flying high-altitude projects are fine, at an altitude of 10,000 meters, there is almost no strong convective weather, but this low-altitude large-speed test flight, that is not good.

Qin Feng nodded: "No problem, this kind of meteorological condition is within the allowable range." ”

Qin Feng had full confidence, and after the engine started, the fighter plane slid onto the runway and soon rushed into the blue sky.

In fact, the rudder surface of the tail is not adjusted randomly, and the current adjustment method can make it easier for Qin Feng to push the operating lever, but if it is at high altitude, due to the thin air, the amount of the rod is originally small, and now this adjustment method may have the possibility of over-operation.

Suddenly, Qin Feng thought of something in his heart, the telex operating system!

In the fly-by-wire operating system, the amount of high and low altitude rods is the same, as long as it is set in the operating system, it is the same, which greatly facilitates the pilot's operation.

At the same time, if it is a fly-by-wire operating system, there is no current problem, flying at a high speed at low altitude, just refueling the throttle directly, and the rudder surface of the tail is controlled by the system itself, so that the fighter can maintain level flight.

Without a fly-by-wire operating system, that's not going to work, he thought of the project of the stabilizer again, and he didn't know when the superiors would approve it and when it would be able to approve the project.

Looking at the horizon in the distance, Qin Feng stopped thinking, now he doesn't have to think so much, just think about how he will operate the fighter.

This time, sprint to a higher speed!

Low altitude and high speed, and then start the test flight!

Flying to the familiar airspace, turning on the afterburner, the fighter roared again and accelerated, as the speed increased, Qin Feng slowly pushed the operating stick, and sure enough, the force used before was much smaller, and the amount of this rod was also smaller.

Then speed up!

700，800，900，

With the change of the strength arm in the tail, now that it is 900, Qin Feng feels that his arm can still bear it, and he is waiting for the fighter to continue to accelerate until it exceeds the speed of sound, and this subject can be over.

As the speed increases, the scenery on the ground is rapidly swept backwards, and if you look out of the cabin for too long, you can even feel a wave of fear.

This is a kind of fear from the heart, ultra-low altitude and high-speed flight is a test of the pilot's skill and courage, if the pilot's skill is not enough, at any time there may be a terrible danger such as a collision with the ground.

And on the ground, when the warplanes fly by, the loud roar will also make the creatures feel fearful from the heart.

A hare was leaping rapidly on the Gobi, and when this terrible roar came, its limbs began to tremble, its body rolled, and it jumped into a dirt pit, and looked up at a terrible steel monster, whistling by.

At this time, its heart was full of fear, and its body was already wet.

Of course, Qin Feng won't see a rabbit on the Gobi, Qin Feng just needs to continue to accelerate, he is also overcoming his fear, at this time, the earth seems to be colliding at any time, and his action is to press the operating lever forward, as if he wants to operate the fighter to dive, but the fighter is flying level.

It's exciting.

Persistence, persistence, persistence is victory!

Qin Feng glanced at it, the speedometer was already pointing to 950, and it was about to exceed a thousand.

When the speed reaches one thousand two, the fighter will enter supersonic speed, as long as the fuselage is in good condition at the moment of entry, then there is no big problem.

At this moment, suddenly, on the dashboard in front, a red light flashed, and Qin Feng couldn't help but be startled just by glancing at it.

"006 report, residual oil warning light on."

What is a residual oil warning lamp? It is used to indicate the remaining fuel of the fighter, if the remaining fuel is too small, it is close to the lower limit of return, it begins to light up, instructing the pilot to end the mission as soon as possible and return to the base, otherwise, the fighter runs out of fuel, then it will not be able to fly back.

However, according to your own calculations, it is no problem to fly for two more minutes of afterburner, but there is still more fuel in the plane, how can there be insufficient fuel?

"006, end the test flight, return immediately." Voices came from the headphones.

"006 Roger."

When Qin Feng pulled it up, he went around in a circle, and deliberately looked at the route he had just come over, he had just flown at an ultra-low altitude, and the speed was too fast, could it be that some pipe of the fuel had burst out, causing fuel leakage?

In this case, there should be fog in the air.

However, nothing.

Although it is said that the low-altitude air resistance is large, but when the engine is flying with full afterburner, the fuel consumption rate is determined, what is going on?

It's weird.

Qin Feng felt incredible, he took one last look at the Gobi outside, and the plane began to return.

At this moment, he was surprised to see that the oil warning light that had just been on was extinguished.

"006 reports, residual oil warning light is off, it may be a false alarm, request to continue the test flight." Qin Feng shouted over the radio.

It may be a line failure, which led to this warning light alarm, and today it looks like it is about to rush to a thousand, so I will go back like this, and I am not reconciled.

"Yes, please pay attention to the amount of oil." A command came from the headset.