"Is this what you said about the mountain wind blowing and the plane 'slightly' shaking?" Leng Yun tightly grips the handle on the helicopter.

The helicopter spun in the air, and the power of the propeller seemed to be controlled by the strong wind, which had no effect at all, and then the helicopter was thrown out directly, and crashed straight into the mountains.

Leng Yun was very calm, he observed the situation under the mountain, thinking about how to get out of danger this time. At this time, Romanova said: "Mr. Leng, please don't worry, I am a strictly trained pilot, and I will never let you have any problems!" ”

This sentence made Leng Yun feel a little relieved, and he took out his mobile phone, hoping that Leng Qianqian could help a little. But a line of text appeared on the phone screen: "If this pilot can't control the plane, Dad, your survival rate will be less than 3 out of 100,000." ”

"Hey, hey, Qianqian, how can you comfort people and ask your dad to teach you?" Leng Yun couldn't help but type and complain on his mobile phone, and then he asked, "Is someone doing something like this?" ”

After a few seconds, Leng Qianqian replied on her mobile phone: "At present, I can't see that at least the helicopter has not been moved." ”

Leng Yun felt a little relieved, at least this accident had nothing to do with the Grim Reaper. He saw Romanova with a serious face, and she grabbed the aircraft control lever with her hand, and Leng Yun could even see that there were very well-developed muscles on the arms of this seemingly weak woman.

Romanova said: "Mr. Leng, you don't have to be nervous, everything is still under my control now, and I will guarantee that we will land safely." ”

Leng Yun saw that the helicopter was crashing into a mountain, and he couldn't help but complain: "If the safe landing you are referring to is the plane crashing directly into the mountain in front of you and then killing people, then congratulations, we are about to do it!" ”

"We're flying in the valley now, and there are a few mountains here that are very steep, and when the air flows through the mountains that are very fast and the ridges are protruding, there is a lot of turbulence," Romanova said. We're just swept up in turbulence now. ”

Leng Yun hurriedly asked, "What should I do then?" ”

Romanova said: "I'm going to lower the helicopter now, and then do you see the gap between the two mountains in front of you?" I'm going to rush through that gap in a moment! ”

Leng Yun said: "Now that the plane is out of control, how can you do it?" ”

Romanova said: "Don't worry, I can do it!" ”

As she spoke, she saw Romanova pull the operating stick of the plane upward, and the plane continued to fly towards the sky, but as the altitude of the aircraft increased, the air flow became more and more urgent, and the plane became more difficult to control.

Suddenly, the ascending plane shook for a moment, and then it continued to fall downward, and the speed of the fall was very fast, even making Leng Yun feel a little weightless.

However, Leng Yun also saw that as the plane descended rapidly, the plane seemed to be a little more controllable, and Romanova pulled the plane hard to the left, and the plane flew towards the gap between the two peaks.

However, the plane is still falling, and if it falls a few hundred meters, I am afraid that it will not be able to pass through the gap in the mountain, but will directly hit a low mountain.

"I'm going to crash!" Leng Yun shouted a little nervously, but Romanova said very calmly: "Don't worry, although this mountain is short, it is steep enough, and I am familiar with the terrain here." ”

"Steep, you say? Does it mean that we will die worse? Although it was very dangerous, Leng Yun still didn't forget to complain.

Just as the plane was about to hit the low but steep mountain, there was a sudden bump, and then it flew much higher. The plane's sudden flight made Leng Yun feel overweight.

At the same time, because the plane was suddenly raised, the propellers stopped spinning, and the plane almost lost power. Even Leng Yun couldn't help but let out a "Ah!!!!!!! Voice.

However, the plane did not fall because it lost power, accompanied by cold clouds "Ah!!!!!! The plane flew straight out, and finally rushed through the gap between the two peaks, and then, the propeller of the plane rotated once, and the plane finally stabilized.

"He's still alive!" Leng Yun couldn't help but let out a big breath.

Romanova smiled and said: "Mr. Leng, your exclamation just now is really full of confidence, you have been screaming for so long, and your lung capacity is really big enough." ”

Leng Yun's face turned a little red, and he said, "I really didn't expect that we would be able to escape death!" ”

Romanova said: "What is there to think of? I'm going to fly the plane, I said, I'll get you there safely, and, as dangerous as it was just now, I'm in control! ”

Seeing Leng Yun, who didn't believe it, Romanova said: "Just now we were facing a high mountain, if we don't descend in height, we will definitely be swept up by the chaotic air flow divided by the high mountain, and then we will die." However, the helicopter was not descending fast enough at that time, so I had to choose to ascend first. ”

Leng Yun felt that this was very strange: "Since you want to descend, why do you want to ascend the helicopter?" ”

"When the air flow through a mountain range with a very fast mountain range with a prominent ridge, the flow trend of the air flow is basically the same, but there is a strong turbulence in the depressions and faults," Romanova said. In the mountains, this turbulence can change to a tumble of air depending on the terrain, especially on the leeward slope where we were just now. ”

Leng Yun asked, "What is a drum of air?" ”

"It's a swirling air stream like a front-loading washing machine," says Romanova. We are in mountainous areas, and the movement of air currents in this terrain tends to produce a series of roller-like air currents. The first mountain in front of the air flow of the higher mountain should theoretically have an updraft, but in reality it is a downdraft from the higher mountain. ”

Leng Yun asked in surprise: "In other words, you raised the altitude just to use the principle of drum-shaped airflow to let the downdraft help us quickly lower the altitude?" ”

Romanova nodded and said, "That's it." Of course, there is a shorter but steeper peak between the last two high mountains, and when the air rushes over that steep peak, there is a very strong updraft that can drag us up. ”

Leng Yun asked, "Then why can we rush over those two peaks without motivation?" ”

"In the vicinity of a constricted valley or mountain pass, there is a Venn effect. The manifestation of this is that the speed of the air flow will be increased by one to two times, and it will reduce the static pressure of the air, so that we will rush through the mountain crevices using the inertia of our previous aircraft and the propulsion of the air current. Of course, we were lucky that the helicopter was able to operate normally in the end, otherwise we would have fallen. ”

Leng Yun said with great admiration: "Your driving skills are really superb, I think, among a beautiful woman like you, your driving skills must be first-class, no, even among men, you are also a first-class driver!" ”

Romanova heard Leng Yun praise her like this, smiled very heartily, and said: "Being praised by Leng Yun like this, even if I really die, I am still very happy!" ”