113 Bad feelings

Chen Fei and Li Donghai flew slowly.

They flew according to the routes required by their superiors.

But sometimes there are differences, but the deviation is not very big. The reason for the deviation is not because their skills are too poor and they cannot fly according to the route, but because they fly to some special places and need to go over and take a look.

The battle last night was over, but the trauma left behind was shocking. Some mountain bags were peeled off, some were blown up and exposed huge pits, while some were still burning in the fires. Of course, sometimes you can see wreckage with black smoke, some were our fighter jets, but more were alien fighter jets.

In a valley, Chen Fei saw an alien fighter jet with good preservation.

Although he fired two alien fighter jets last night, because of the night and the distance was too far, he did not see what alien fighter jets looked like, but now, he has seen it.

The alien fighter jet has a forward sweep wing, which looks a bit weird.

When it comes to forward-swept wing fighter jets, our first reaction is usually Russia's Su-47 "Golden Eagle" test aircraft.

This model was developed in the 1980s and then flew for the first time on September 25, 1997. It is one of the technical verification aircrafts of the fifth-generation fighter jets of Russia. Although only two prototypes were built, it has accumulated valuable test data and technical experience for the Russian aviation industry. Its maximum flat flight speed is Mach 1.65.

The Su-47's main wing forward sweep angle reaches 37 degrees, making it the first weapon-equipped forward sweep jet fighter. The fixed weapons include a 30mm Gsh-30-1 air cannon and are also equipped with a built-in bullet bay that can launch R-27 fighting missiles or R-77 medium-range air-to-air missiles.

The F/A-37 "Bird Claw" stealth fighter in the science fiction air combat movie "Top Secret Flight" adopts a more advanced folding knife wing design. It is actually a foldable forward swept wing design, but it can be folded at high speed cruising state to a position close to the fuselage, further reducing air resistance.

As we all know, the earliest aircraft were straight wings, which were basically perpendicular to the fuselage, without a forward or backward angle of attack.

This design encounters a bottleneck when approaching sound impairment.

In order to break through the sound barrier, two sets of solutions for forward sweep and back sweep emerged.

So in fact, during World War II, when countries designed high-speed aircraft, the research on forward swept wings and swept wings was actually carried out simultaneously.

Needless to say, swept wings have good high-speed performance and mainstream technology. However, the problem with swept wings is poor low-speed performance and low lift. For this reason, a lot of methods have been developed to solve this problem, such as large triangular wings, canards, variable swept wings, etc.

The forward swept wing also has a good lift at low speeds, because the center of gravity is more reasonable, so it has high maneuverability, and rolling and vertical maneuvering are also more agile. There are many advantages in performance.

But there is a fatal problem with forward sweeping wings - twisting and diverging.

For forward swept wings, the forward-extended wings will be distorted by airflow during flight. Then this distortion will increase the angle of attack of the wings and increase the torsion of the aircraft wings.

To give a simple example, if you take a book and use the side of the back of the book to face the wind, the pages will not be turned on when the wind blows over. On the contrary, the bigger the wind, the tighter the pages will be harder to open. And if you turn the pages against the wind, just open a little bit of the book and then blow it away. The former is similar to the sweep wing, and the latter is similar to the sweep wing.

To solve this problem of twisting and divergence, we must increase the structural weight or limit the flight angle of attack. The added weight of the former is enough to offset the performance advantages of the forward swept wing, while the latter brings great safety risks, so the forward swept wing technology has never become the mainstream technology.

Chen Fei did not expect that the alien fighter jet would actually be such a forward sweep wing.

In this battle last night, many alien fighter jets must have been hit and landed on the ground. After collecting them back, they were carefully studied. Perhaps, our aviation industry can make a big breakthrough again!

Chen Fei thought while flying.

"Yinglong, five kilometers ahead enter the complex valley. Please be careful, it's over!" Chen Fei was looking here and there, and suddenly the sound of a finger ringing in the radio.

"Yinglong received it, five kilometers ahead of him entered the complex valley area!" Chen Fei repeated it.

Afterwards, he turned his head and looked at Li Donghai, and the guy gave him a thumbs up.

Chen Fei continued to move forward at an altitude of 4,500 meters according to the preset course, maintaining a medium speed.

The radar alarm device flashes from time to time, and Chen Fei will take a look at it every time, but these are G-band radio signals such as ground navigation radar or XX missile positions.

Of course, logically, there shouldn't be any radar signals from alien fighter jets today, but Chen Fei still warned himself to be careful.

After flying forward for a while, the towering snow-capped mountains were vaguely visible. Next, Chen Fei and Li Donghai were about to fly past the tops of these mountains.

"Silver Dragon, get up to a height, be careful of the airflow, it's over!" Chen Fei reminded.

"I understand!" Li Donghai agreed, then pulled the rod and pulled up his J-10 C. In this way, they formed a formation form of one high and one low. Li Donghai was cruising at high altitude, while Chen Fei was cruising at the top of the mountain.

After flying forward for a while, a strange feeling suddenly surged in Chen Fei's heart.

Since he fired two alien fighter jets last night, he has picked up the attribute of the sixth sense. The so-called sixth sense, simply put, is intuition, or it can be said to be the early warning of the human body. If he encounters danger, he will have feelings in his heart.

At this time, Chen Fei's sixth sense issued a warning, and something seemed to appear ahead.

He was stunned for a moment, and after coming to his senses, he pressed the pole slightly, lowered the altitude of the plane a little, no longer flew from the top of the mountain, but flew through the canyon.

Chen Fei had just lowered the height a little, and then said, "Yinglong, your height has dropped too much!"

"Union, I want to fly among valleys. I always feel that something will happen in these valleys, it's over!"

The radio was silent for a while before saying, "Allow you to fly in the valley, be careful! It's over!"

"Yinglong received it, it's over!" Chen Fei replied, then lowered the height again.

He would look at the radar alarm from time to time, but there was no special situation.

"Silver Dragon, have your radar alarm discovered?"

"No, it's normal!" Li Donghai replied.

"Be careful, for some reason, I felt a sense of uneasiness in my heart! It's over!"

"I understand!" Li Donghai replied, and his relaxed nerves suddenly tense up.

Chen Fei's words have no basis, but to be honest, after being a pilot for a long time, they will actually be a little suspicious, and even believe in mysterious things and some superstitions. This is why some people joke that when you are a pilot, you need to read more aerodynamics in the primary stage. When you are an intermediate stage, you have to read more Buddhist scriptures and other things. Many things seem to be destined.

Many pilots believe in intuition, and Chen Fei and Li Donghai are no exception.

After flying for a while, Chen Fei's uneasiness became stronger and stronger, so he asked on the radio: "Is there any early warning aircraft over there? Is it over?"

Chen Fei knew that there were early warning aircraft or something in the high altitudes in this area. Unfortunately, there was no data link on their J-10 C, otherwise he could directly call the data of the early warning aircraft. Now, he could only ask the joint command center.

"There is no early warning aircraft, but the ground radar report is normal! It's over!" Lianshi said.

After flying for a while, Chen Fei said: "Union, please turn on the fire control radar."

The radio was silent for a while, then said: "Allow the fire control radar to turn on, it's over!"
Chapter completed!