Large holes began to appear in the sea of ​​clouds below, which looked like a bottomless abyss against the backdrop of sunlight and shadow.

At the waterfall cliff in the clouds, between the rolling clouds, the land that Lan Ze had measured with his footsteps flashed past in the abyss.

It is a pity that the aerodynamic shape of passenger aircraft has the characteristics of "static stability".

Most of the time, this is of course an advantage. The parallel posture is stable, which means it is friendly to the human body and the operation is relatively easy.

However, there is another side to the matter.

The static and stable aerodynamic structure makes it difficult for a passenger aircraft to change its posture. To turn a corner, it needs to make a large circle in the air. At speeds close to the speed of sound, it takes hundreds of miles to make a U-turn.

Most highly maneuverable aircraft, such as military drones, have "statically unstable" aerodynamic structures.

Once it loses power, this kind of beautiful flying weapon becomes almost like a cement block, twisting and falling in the air.

With the support of a powerful engine, it can freely flip, turn, and change flight status. If there is a pilot inside, the external speed and attitude changes will cause terrible overload forces due to inertia, which can kill people.

The human body is too fragile. Even if the pilots are carefully selected healthy humans, they can only withstand limited g-forces for a short period of time.

In an aerial waltz, only "statically unstable" aircraft can jump out. And it's best if there's no one inside.

The price of aircraft stability is loss of flexibility.

Therefore, the flight movements of passenger planes are limited by innate conditions, and there is no way to make them fancy.

The fat bird's plump figure and aerodynamic structure are very suitable for long-distance flight. It is not only stable but also fuel-efficient. This means that if you want the fat bird to fly strange movements, the air resistance will be relatively large.

Zhang He and Lan Ze, one was flying the plane and the other was watching. They both sighed. This must be a coincidence.

Zhang He turned to look at Lan Ze, and Lan Ze also turned to look at her.

"Sister, we have reached 15,000 meters."

Lan Ze has been staring at the readings on the dashboard.

"Hmm. What do you want to do?" Zhang He's flight helmet is easier to use than the instrument panel, and all aircraft data can be controlled by the helmet.

"Sister, you can fly upside down or do a barrel roll. There is no danger in rolling."

Zhang He glanced at classmate Xiaolan and said, "How about I do another Pugachev Cobra, take the Flores Roulette, pass the stall, and then change the tail spin?"

Lan Ze was overjoyed: "Is it okay?"

"How is that possible?" Zhang He criticized him, "Children, this is a passenger plane. If the overload force is too great, the plane will fall apart."

"Then play it easy." Lan Ze suggested in a low voice because he lacked confidence.

"How many g's of overload can you withstand?" Zhang He turned to ask him again.

"I haven't officially tested it." Lanze replied.

This touched a sore spot for him. He was familiar with the professional-grade navigation simulator placed in the university sports hall, which was equivalent to a high-gravity extraterrestrial environment with heavy overload.

At that time, he thought his future was in the sky.

The liquid cockpit in the simulator environment is designed for use in extremely harsh environments with large overload forces. He has also been able to control it skillfully.

But in the end, it's just fun.

"There is no formal test, how many can there be?" Zhang He continued to ask.

"I don't know. I have played with liquid tanks in the high-fidelity simulator of the Federation before."

The liquid cockpit itself does not have high physical requirements, but the requirements of the high-simulation simulator are abnormal.

"Then you have a good physique."

Captain Zhang He put down his helmet visor decisively, intending to be tough.

"People behind, please pay attention! Tie yourself securely to the chair. In two minutes, the plane will enter maneuvering flight."

Sister Zhang made a verbal announcement to the cabin, and there was a panicked sound in the cockpit.

"Hey, don't do this nonsense!" someone shouted. I don't know if it was the pilot or the maintenance engineer.

"Stop! I'm still outside!" This was probably the pilot.

The sound broadcast in the cabin is too noisy.

Zhang He opened the monitoring window on the dashboard in front and glanced at the real-time image of the crew in the cabin.

Then I ignored it.

When the two-minute timer expired, the fat plane flapped its wings and quickly turned over.

"Ah" there was a scream from the small speaker in the cockpit. Several ladies in the back, I don't know if they were flight attendants or flight attendants, screamed in unison.

It was cut off neatly. Zhang He finally turned off the intercom at this time.

Lan Ze's head was down, tightly tied to the seat. When he looked up, he saw a bunch of clouds and the earth. The clouds were above the person again, together with the earth.

He noticed that Zhang He controlled the nose of the aircraft at a negative elevation angle. In this way, the Fat Bird could still obtain lift stably in inverted flight.

Zhang He performed this movement smoothly and smoothly without any bumps. It was just that the head was turned upside down, causing blood to rush to the head.

After remaining head-down for a while, Lanze discovered that there was something wrong with the aircraft status displayed on the instrument panel.

"Sister, left engine!"

"Well, I know."

The power of the left engine kept weakening, and after a minute or so, it simply stalled.

"What should I do? Sister!"

Lanze has flown many types of aircraft in simulators, and he has also flown aerospace series aircraft, but he has never flown civil aviation.

"It's okay." Zhang He was not nervous or anxious. He was calm and calm.

The big fat bird hanging in mid-air has only one engine still working.

"Is the engine still on fire?" Lan Ze tried his best to sound calm.

"I can't light it now." Sister Zhang continued calmly.

"Why?" Lan Ze believed that Zhang He was sure.

But the problem is that he has never flown a real airplane. So, Sister Zhang, she is probably, maybe, maybe, really sure of it, right?

"The oil line is broken."

Zhang He's answer was very concise.

Airplanes don't actually burn oil, they burn a mixture of various hydrocarbons. But they are still liquids. Calling them oil is purely a habit left over from history.

Due to the design, when the passenger plane flips horizontally, there is a certain probability that the oil circuit above will be disconnected. Zhang He happened to be lucky this time.

Highly maneuverable aircraft do not have this problem. Fighters can flip vertically as long as the pilot can bear it.

Another emergency call came in: "Captain, pay attention to the engine!!!"

Zhang He cut off his voice again.

Immediately, the wings of the fat bird sank on the side where it had lost power. Lan Ze was startled, thinking something was going to happen.

Unexpectedly, the bird just turned over.

It flipped back to its normal position of flying on its stomach.

The earth and white clouds disappeared from above.

Zhang He lifted up the visor of her helmet, glanced at Lan Ze, and found that Lan Ze's face looked bad, so she put the visor back on without saying a word.

The left engine was re-ignited and the aircraft status returned to normal.

Lan Ze looked at the data on the dashboard and felt a lot more at ease, and he breathed a sigh of relief.

Zhang He lifted his mask again.

"How is it? Is it thrilling or thrilling?" Sister Zhang proudly asked classmate Xiaolan.

"Sister, I know why you are a woman."

"ah?"

"You're crazy."

"Boy," Sister Zhang He's expression was very serious. "Spank your butt if you say bad words."

Unknowingly, Lanze always regarded her as a buddy, forgetting that this guy was actually a woman.

"Sister, I was wrong." Xiaolan admitted her mistake humbly, and then praised her in a different way, "Sister, you are so awesome!"
Chapter completed!