This civilization is very strong, but the technology tree is a bit crooked

The drone headed west.

Soon, they came to the Baihetan Hydropower Station in the Hengduan Mountains.

The water flow from the upstream Jinsha River is intercepted here by a 300-meter double-curved arch dam, forming a super reservoir with a water storage level of 825 meters.

"It is indeed the pinnacle of the hydropower industry."

"This dam is simply a high wall, stronger than the wall that attacked the giant."

Chen Yi controlled the drone to lower its altitude and took various photos in a circle.

After taking photos, move on.

Further forward is the area where the Three Parallel Rivers flow.

Jinsha, Lancang, Nujiang, the three big rivers flow from north to south in the shape of Sichuan.

The drone flew over the sky of Sanjiang, startling groups of black-necked cranes and black storks, leaving vivid figures in Chen Yi's camera.

"If you have time, maybe you can take an aerial photography trip."

"Using my drone to take aerial photos, wouldn't it be more exciting than the program "Aerial Photography of the Planet"?"

After crossing the Three Parallel Rivers area, Chen Yi began to enter the Himalayas.

Towering snow-capped mountains flashed under the camera.

In the canyons and plains between the high mountains, the mysterious Yarlung Zangbo River is flowing slowly.

The snowmelt from the Himalayas has created this large river with the highest altitude in the world and the fourth largest water flow in the world.

Fly for a while along the runoff of the Yarlung Zangbo River.

Soon, the drone was on the highest mountain in the Himalayas.

— Mount Everest.

Don't wait for the drone to drop from the sky.

The infrared scanner has already scanned the surface of Mount Everest, one by one small but bright red dots.

Chen Yi lowered the speed of the drone.

Avoid the sonic boom generated at high speed, causing an avalanche in the mountains.

Then, under the amazement of groups of mountaineering tourists, the drone slowly descended to the top of Mount Everest like a mosaic.

"Himalaya, Mount Everest check in!"

Chen Yi controlled the camera of the drone and took a few photos of the stele of the world's No. 1 peak.

Then it took off vertically, adjusted the angle, projected the shadow of the drone on the surface of the peak, and continued to take several photos.

"The check-in is complete, it's time to go back to sleep."

After completing the check-in goal this time, Chen Yi yawned and controlled the drone to return.

Take off vertically.

After flying hundreds of meters away from the top of the mountain, a dry land plucked onions.

The UAV quickly rushed to an altitude of tens of thousands of meters, and then turned on the maximum thrust.

boom!

A sonic boom exploded in the vast sky.

The drone quickly turned into an afterimage and disappeared into the eastern skyline.

"Come and fly more than 5,000 kilometers, and the remaining 28% of the battery"

"Then, the next return journey will use leapfrog gliding to maintain the balance of power."

"By the way, the aerodynamic coefficient of the fuselage can be further tested, as well as the performance of extreme working conditions."

Flying away from the border of Mount Everest, Chen Yi looked at the remaining power, and without hesitation, he directly lifted the drone to an altitude of 40,000 meters.

After rushing to an altitude of 40,000 meters, the speed of the drone has reached Mach 5.

At this time, the horizontal stabilizer flips down.

The fuselage began to rise and become a parabolic gliding descent.

Then the left and right ailerons deflect and the aerodynamics change.

The whole drone started to spin.

Hurrah!

Drones spin faster and faster.

After a while, the angular velocity of the wing broke through the speed of sound.

At the beginning, like a park uncle whipping a big whip, there was a crackling sonic boom.

Wisps of sonic boom clouds are generated at the edge of the wing.

But before it was formed, it was crushed and dissipated in the next moment, and then regenerated and dissipated again.

crunch! crunch!

There was a creaking sound in Chen Yi's ears.

The AR glasses in front of me, the dense flight data, and the status parameters of the fuselage are also constantly being refreshed.

"As expected of a carbon fiber material with a basic tensile strength of 7Gpa, it has not been affected at all."

Chen Yi checked the status parameters of the drone and heaved a sigh of relief.

Don't look at the creaking sound of the fuselage now.

But this is just the resonance of the fuselage structure, there are also dynamic balance differences, and the sound produced by rotational vibration.

The material of the fuselage itself has not been affected at all.

"It seems that on the basis of carbon fiber, further adjustments have been made to upgrade the strength attribute by 8 points."

"The tensile strength of today's fuselage materials has reached the limit of Darwin's spider's silk."

Chen Yi took out a pen and paper, and calculated the flight data of the drone at this time.

Soon, he figured it out.

In the current state of high-speed rotation, the tensile strength of the fuselage material has far exceeded the limit of steel and the limit of special glass fiber.

Under such a rotating pull.

Only the strength of Darwin's bark spider silk can withstand it.

"Darwin's bark spider silk is currently the second highest tensile strength material in the world, and it is also the strongest biological material in nature.

Before the birth of carbon nanotubes, Darwin's bark spider silk has always dominated the list of materials.

The tensile strength is 21 times stronger than the top steel."

Chen Yi recalled the parameters of Darwin's barking spider silk, and thought about it: "The limit of this experiment can be further strengthened."

There is no problem with determining the strength of the fuselage.

Chen Yi immediately decided to continue to increase the intensity of the experiment.

Test the parameters of the UAV in the limit state, and expose possible problems in advance.

Puff!

The azure blue glow bloomed on the wings.

The UAV, which was originally rotating rapidly, is under the active rotation of the fuselage.

In an instant, the rotation became even faster.

But a minute.

The UAV rotates and dives from an altitude of 40,000 meters to a height of 20,000 meters.

At this time, the drone spinning at super high speed seemed to have turned into a tornado.

It also seems to be an enlarged version of Naruto - "tooth through teeth", stirring up a huge cyclone.

"Fuck, what is this!?"

When the drone rushed to an altitude of 20,000 meters.

More than ten kilometers away.

A Veyron fighter jet that was performing a separate transition mission also discovered the movement of the drone.

In the stratosphere where there is no cloud cover, the crazy rotation and dive to the drone is like a lice on the head of a monk.

This is clearly visible even at a distance of 10,000 meters.

"0738, what did you find?"

The control tower, which is always in contact with the fighter plane, heard the uncontrollable shouts of the pilots, and called for inquiries immediately.

"Report to the tower, 0738 found an unknown aircraft that was spinning and falling at a high speed."

"The falling speed was Mach 1.2, and the optical scanning was blurry, as if a layer of mosaic had been applied.

The airborne radar could not detect the signal, and it was suspected that a new type of stealth technology was used. "

"Application No. 0738 for close observation, please approve by tower."

Pilot 0738 is reporting quickly.

At the same time, the signal image of the optical scanning is transmitted back to the tower, and an application is made for close observation.

"Approved to approach, but pay attention to safety."

"Focus on observing the falling direction and angle of the target, and determine whether there are residential areas below."

"If there are residential areas, autonomous interception is allowed, and the safety of people's lives is the first priority."

"0738 Received!"

After confirming the tower's order, the 0738 pilot did not hesitate.

The afterburner mode of the engine was turned on for the first time, broke through the sound barrier, and chased after Chen Yi's drone.

Rumble!

0738 just caught up with the target.

Suddenly, the aircraft in front is spinning at supersonic speed.

Blooming streaks of blue light like hedgehogs.

Then the rotation speed of the aircraft is rapidly decreasing, slowing down, slowing down.

After reaching the 13,000-meter area.

When the civil aviation altitude of 12,000 meters is less than 1,000 meters.

This unknown aircraft completely stabilized the fuselage and pulled out a full moon-like trajectory in the air.

The fuselage changed from a dive posture to a pulled up state.

Immediately afterwards, violent airflow and blue glow were ejected from the tail, and the entire aircraft soared into the sky

high speed.

All of a sudden beyond Mach 2.

Then it rushed to an altitude of 20,000 meters and 30,000 meters, which exceeded the ceiling height of Veyron.

"."

No. 0738 was dumbfounded, and hurriedly reported to the tower: "Report to the tower, the target stopped rotating at an altitude of 13,000 meters, pulled up again, entered the critical space at supersonic speed, and could not be observed closely."

The tower was silent.

Looking at the emergency plan that has just been launched, notify the nearby airport tower, as well as the Air Traffic Management Bureau, to carry out air control instructions.

".0738, please reconfirm your observations."

"Report, I'm sure!"

No. 0738 answered seriously.

But as soon as he finished speaking, he saw a high altitude tens of kilometers away.

Without the cover of clouds and mist, the aircraft, which was unknown just now, swooped down again like a rotating mosaic.

".Report to tower, it's swooping down again."

"Please allow me to conduct a mid-air interception and determine the identity of the other party."

This time, the control tower seemed to have guessed something, and there was no response at all.

Waited for a few minutes.

A new command was sent back.

"No. 0738, please continue with your transition mission and ignore this unknown aircraft."

"But."

"It's classified."

confidential?

No. 0738 was startled.

Looking at the unknown aircraft that started to stop spinning like a hedgehog in the distance, and then pulled up again like a leaping frog, there was deep shock and anticipation in his eyes.

Could it be that this is a new type of fighter jet that is being tested for flight?

But what kind of fighter plane needs to use such a test flight method of rotating leapfrog.

This is too violent.