No. 007 J-10S roared and took off close to the runway, and its altitude barely changed when it flew over the valley, about three meters higher than the runway, which is a difficult altitude to control well in take-off speed, especially for a fighter like J-10.

Li Zhan carefully held the joystick to keep the fighter in level flight, carefully controlling the speed, neither too fast nor too slow, too fast will miss the turning node, too slow there is a danger of stalling. At the current airspeed, the fighter plane is swaying slightly from side to side, like a child who has just learned to walk but wants to run. This is because the airspeed is infinitely close to the minimum velocity at low altitude.

This is undoubtedly challenging.

"Fifteen hundred meters to the steering node." Zhang Wei reminded.

Li Zhan replied, "Understood, 1,500 meters." ”

Obviously, if the airspeed is not controlled, the fighter will miss the steering node if he is not careful when he takes off, and there is no choice but to pull up and fly south, and he must pull to more than 1,500 meters to cross the mountain peak in front, which happens to invade the route of the tourist airport - the sea height of the route of the tourist airport is 1,500 meters, with 300 meters as an airspace layer, and several airspace layers up have civil aviation routes.

"Turn to 270, repeat, turn to 270, tower, I'm going into the mountains." Li Zhan made a beautiful ninety degree turn to the right, and the course turned from 180 degrees to 270 degrees, while reporting to the tower.

The ground radar will soon lose the signal of the No. 007 J-10B combat training aircraft, Tang Guozheng reminded, "Received, don't do it brutely, if you can't pull up the altitude, the tourist airport has been coordinated, and this airspace is ours before 1030, it's over." ”

"Understood!"

……

On the other side, Zhao Long controlled the drone to take off, and said to Wang Hu, "Do you see a line of sky, the visibility is not very good, if you shoot with a telephoto lens here, it will definitely not be good, with the drone, there is no such problem, I can fly to the front and come slowly, slowly find an angle and shoot slowly." ”

"Let me play for a while." Wang Hu looked at the drone that took off steadily and buzzed towards the valley.

Zhao Long said, "What's the hurry, this is not something that can be learned in a while, wait until I finish taking photos to find an open place for you to practice first." ”

"It's not like I haven't played with remote control planes, what's so difficult about this." Wang Hu was not convinced.

The two of them retorted without saying a word, and the drone flew slowly in the oval-shaped valley towards a line of sky more than a thousand meters away under the control of Zhao Long.

……

"Tower, I want to try to pass through the sky, over." Li Zhan reported.

Tang Guozheng didn't hesitate too much, and replied, "Cave and hole, you can control it yourself, safety is the first, it's over." ”

"Understood." Li Zhan breathed a sigh of relief, he was afraid that Tang Guozheng would temporarily change his hexagram.

Crossing the first line of heaven is a predetermined plan, but the timing must be decided after consultation with the tower commander. It can be pulled up before crossing the first line of sky, but that requires a climb with a large elevation angle, which is not very difficult for an unloaded fighter, and it will be difficult if it is a heavy load. And the space of the first line of sky is completely enough for fighters to cross the past, and all that needs to be paid attention to is the possible crosswind.

At least there is more height than crossing the Tianmen Cave.

Zhang Wei said, "There is only less than 50 meters of space on the left and right, so you have to be careful." ”

"A 50-meter sprint in five or six seconds, this distance won't have a big impact at all, don't worry." Li Zhan said confidently.

When flying in dense formations, the distance between the fighters is generally within 10 meters, and the distance between the fighters and the mountains on both sides is obviously very forgiving. Every fighter pilot has been trained to fly in all formations, and intensive formation is one of the subjects that are often trained, and some of the brave pilots will even control the distance at about five meters, which is about to catch up with the 1 August Air Show Team.

"Tower, what's the weather?" Li Zhan asked.

Tang Guozheng quickly checked the latest weather and replied, "The weather is very good, the low air flow is stable, and it's over." ”

"Roger, the airflow is stable. Two kilometers away from the first line of heaven, you can see it at the last turn, it's over. Li Zhan reported.

From east to west to a line of sky, you need to make a turn of about 120 degrees to the south, which is also a big difficulty. Flying in a canyon is inherently risky, and it is obviously even more difficult to make a sharp turn. However, in Li Zhan's eyes, this turn was nothing at all. Li Zhan had long been accustomed to the sharp turns and smaller angles in the Beiku Mountain Valley, and at this time, driving a J-10S combat trainer with better performance, Li Zhan seemed to be taking a leisurely walk in the face of a much easier turn than the Beiku Mountain Range.

Li Zhan said with a smile, "Lao Zhang, look at it, it looks scary when you cross the first line of sky, but you sit back with peace of mind, everything is under my control." ”

"You can be careful, J10 is very expensive." Zhang Wei said, inevitably a little nervous.

Li Zhan smiled and didn't answer, pushed the throttle lever slightly, and turned sharply to the south at the same time. The airspeed of the fighter will drop when turning, because the speed will decrease when the windward area increases, and the thrust must be increased accordingly to maintain the airspeed.

Zhang Wei clearly saw that the speed displayed by the airspeed monitor had not changed, and the number displayed was only about two knots oscillating, which made Zhang Wei convinced. You must know that Li Zhan didn't have much time to drive the J-10, and he flew for more than 100 hours in the modification and training of the Big Red Eagle Division at that time, and most of them were taken away.

"There's a silver lining ahead, get ready." Li Zhan said.

At this time, the ground radar of the tower of Zhongnanchang Station could not see the No. 007 J-10S, but there was no problem with communication, so the call between Li Zhan and Zhang Wei could be heard.

Zhang Wei said, "I'm ready, it's all up to you." ”

"Walking."

Li Zhan suddenly increased his airspeed, and the fighter plane reached a speed of 666 kilometers per hour in a very short period of time, rushing towards a ray of heaven like a human eye. Zhang Wei watched the mountain change rapidly in front of him, and the nose of the plane seemed to crash towards the mountain. His heart was in his throat, where had he seen this formation. You must know that he hasn't been on a plane for many years, and he flew with him for a few hours some time ago, but it was all an old man's walk-like flight, how could he have such a drastic action.

It's much more exciting than riding a big pendulum roller coaster or something.

No. 007 J-10S plunged headlong into the sky, Zhang Wei seemed to hear the sound of the whirring wind in his ears, and the cliffs on both sides almost flew over the skin of his left and right cheeks. The length of a line of sky is only a few hundred meters, and it is a matter of the blink of an eye for a fighter plane traveling at a speed of more than 600 kilometers per hour.

However, in the blink of an eye, something suddenly happened.

Li Zhan began to quickly operate the rudder with his hands and feet when he saw a UFO at one o'clock, the UFO seemed to be hovering in the air, and the top glass of the cockpit canopy of the No. 007 J-10S almost rubbed against the UFO. Zhang Wei's eyes were also very good, he saw the UFO shooting towards the top of his head, and when he subconsciously shrank his neck, it had actually crashed into it - if it did.

In that moment, Zhang Wei's most obvious feeling was that the attitude of the fighter was suddenly changed, the engine made a terrible roar, the elevation angle of the fighter instantly increased, and then the fighter had an obvious rapid deceleration, and he couldn't wait for a cobra to maneuver. Seeing that the fighter plane was about to hit the cliff upwards, the nose of the plane quickly descended very obediently and once again resumed its flight attitude just now. At this time, the fighter plane rushed out of the sky in one breath.

The whole process took place in just two seconds, and it took more than ten seconds for Zhang Wei's cold sweat to burst out, and his voice was a little trembling, "What was that just now?" Bird? Bat? Or what? ”

"Your bird's bat is so big, it's obviously a micro-drone. Let's go back and talk about it, the helmet's camera must have taken pictures. Li Zhan was not afraid because he almost collided in the air, but because of the appearance of a miniature drone in the deep mountains where birds don't, the first thing he thought of was that there were criminals spying on the military.

Security and confidentiality are a big deal.

"Tower, tower, hole, hole, hole, spot, micro drone found in the first-line sky domain, a drone dozens of centimeters long and wide, it should be a type of camera, there is a mountain road on the north side of the canyon, there may be lawbreakers, over." Li Zhan quickly reported and gave his own judgment.

Tang Guozheng was taken aback, and he also immediately thought that it might be an outlaw who was spying on the military intelligence. Even though the Zhongnan Field Station has been a spare tire for more than ten years, it is also a genuine military center, a forbidden area where local personnel must not cross the thunder pool for half a step, and it is absolutely not allowed to carry out activities such as filming to obtain information.

It didn't take long for the Zhongnan station to be reopened, and there were criminals who sniffed the smell of it, which means that the security and confidentiality situation of the station is very serious, and as the main person in charge, Tang Guo has the absolute leadership responsibility - your security and confidentiality work has not been done well!

"Dong Dong Gui, are you going to return directly, over." Tang Guozheng asked.

Li Zhan said, "Tower, I'll go back the same way, if I move fast enough, I should be able to find some clues, but I have to fly close to the north side of the canyon, I need your approval, it's over." ”

Tang Guozheng thought about it for more than ten seconds, and replied decisively, "Dong Dong Kui, I approve your actions, you must pay attention to safety, you can use any airspace at any time, over." ”

"I understand!"

Li Zhan quickly pulled up, then turned around in a sharp small radius, turned back from due south, and flew towards the sky along the route he had come.

Li Zhan and Zhang Wei were taken aback, while Zhao Long and Wang Hu were almost scared to pee their pants. They only saw a shadow flash on the screen, and then the drone shook violently and swayed crookedly, and Zhao Long took a lot of effort to get the drone to resume its flight attitude before it crashed.

"What the hell is that?" Zhao Long's lips were trembling, "What a big bird!" ”

There are tens of thousands of drones, no matter how rich you are, you can't play with them, and besides, this is the first time he has flown off, of course he was so scared that his heart was about to jump out.

Wang Hu was calmer, frowned and said, "It seems to be an airplane?" ”

"Are you okay, how can it be an airplane, and if the plane is not a drone, how can it fly to the sky, can it fly there? It looks like a big bird. Zhao Long retorted.

Wang Hu was unsure and said, "It looks like an airplane, like a fighter plane." Yes, wasn't there a rumbling sound on the other side of the mountain just now, maybe it was the sound of a fighter engine. ”

"Can't you?"

Zhao Long began to get scared, if it was really a fighter and because his drone fell......

He didn't dare to think about it, and said calmly, "Just fly back and take a look, you must have filmed, I just started the continuous shooting mode at that time, and I will definitely be able to see clearly." ”

Zhao Long nervously controlled the drone to return, and his heart was very chaotic. Wang Hu was also worried, for fear that if he really ran into a fighter plane and caused the latter to crash, the crime would be great, and he might have to accept legal punishment.

They are not uneducated people, on the contrary, they have all gone through the right track of higher education, and some basic common sense is very clear. For example, hitting a bird can cause a huge plane to crash, for example, flying a kite around the airport or something will be caught by the police station, and so on.

Although the drone was controlled by Zhao Long, it was he who brought Zhao Long here, and he was considered an accomplice.

Thinking of the prison bars and the dark life inside the film and television works, Wang Hu was chilled, and finally scared, saying, "Why don't we run, anyway, no one knows and run quickly, even if you find it later, you can say that you don't know, and there is no law that prohibits playing drones in the mountains." ”

Zhao Long calmed down first, and said, "What are you running, I don't know what the situation is, don't worry, wait for the drone to come back and see the photos." Maybe you're mistaken, it's a big bird. ”

"It can't be a big bird." Wang Hu contacted the upper and lower levels and recalled that it was more and more sure that it was an airplane, and he said in a deep voice, "Just now it was the sound of the aircraft engine, the passenger plane will not fly so low and will not fly into the mountains, but the fighter will be." You forget, there is an air force airport not far to the northeast, when we were children, we rode bicycles up the mountain to see the plane, and you forgot to be chased by soldiers with guns? ”

Zhao Long was unsure again, "Can't you?" The airport has not had planes for many years, and it can't be an airplane. To the south is the tourist airport, where 80% of the sounds you hear come from. ”

"More than 20 kilometers, what sound can travel so far!" Wang Hu said with a glare.

He is talking about the distance, in fact, the straight-line distance of the tourist airport is about 12 kilometers, and the sound produced by the aircraft flying at high altitude supersonic speed is completely able to transmit to this distance, but it is not the sound of the engine, but the sound formed by the friction between the aircraft and the air after breaking the sound barrier.

"Don't make noise, don't make noise! The plane quickly returned, and everything was clear after looking at the photos. Zhao Long said.

Of course, planes will come soon, and not just his drones.