So the 47-ton rocket model in front of him is completely within his tolerance.

"Whew!"

A breath came out, and everyone in the distance saw that the rocket model was lifted up silently, without a loud rumbling sound, and there was no other movement, just like the planet's gravity lost its restraint on the rocket model, so that this 47-ton thing actually suspended in the air, and Yu Zetong flew into the sky.

"Really...... It's unbelievable if you don't see it with your own eyes. ”

Hong Bin wiped his glasses with a handkerchief, the desert was very windy and sandy, and after a while, the glasses were full of dust.

Although it is only a rocket model, it is still equipped with a lot of sensor equipment, and after Yu Ze lifts the rocket model to fly, the telemetry system will automatically transmit various sensor data on the rocket model back to the ground and provide them with monitoring and analysis.

Therefore, when they can't see Yu Ze and the rocket model with the naked eye, they can still find Yu Ze from the equipment monitoring screen.

"Dongfeng optical USB radar tracking is normal."

"Telemetry is normal."

"Jiuquan tracking is normal."

This place is very close to Jiuquan, and they can clearly see the shadow of the rocket model through optical telemetry, but in the telemetry at this distance, compared to the huge rocket model, Yu Ze's own body size is too small, and it is just a small black dot on the screen.

"It's still a little slower."

Dong Shuxian groaned.

Yu Zetuo held up the model rocket and flew up at a speed close to the speed of sound, which looked terrifying, but compared to the real rocket launch flight speed, it seemed insignificant.

Rao is like this, in one minute, Yu Ze flew to an altitude of 15 kilometers with the rocket model, 2 minutes later, he reached an altitude of 31 kilometers, and after 3 minutes, he reached an altitude of 47 kilometers.

When he reached the 80-kilometer demarcation line of the Kármán Line, Yu Ze only took 5 minutes.

In fact, unlike the real rocket flight orbit, after the real rocket is ignited and takes off, it first flies in the thick atmosphere, crosses the speed of sound, passes through the maximum dynamic pressure region, and then flies out of the atmosphere, and finally sends the spacecraft into the predetermined orbit.

This flight process needs to go through the vertical take-off section, the program turning section, the orbit section, the vertical take-off section is well understood, that is, the rocket flies vertically upward, but soon, the rocket will fly in the direction of launch according to the predetermined pitch angle, which is to reduce air resistance, avoid aerodynamic load and aerodynamic interference, and smoothly cross the speed of sound before flying at an angle of attack close to 0 °.

The rocket model held by Yu Zetuo is different, he is in a vertical ascent mode from beginning to end, forcibly overcoming the constraints of the earth's gravity, and the distance is far from the real rocket launch orbit, which is why his speed is not as fast as the rocket, but the time of the final exit from the atmosphere is almost the same.

Near the Kármán line, many first-stage rockets can be separated, and the second-stage rockets are used to boost and accelerate, according to common sense, when the second-stage rocket is ignited at this moment, it itself has an initial speed of 3 kilometers per second to 6 kilometers per second, so only a small acceleration is needed to increase to more than 8 kilometers per second.

But at this time, the rocket model lifted by Yu Zetuo rose vertically to the vicinity of the Kármán line, even if there was a slight arc tilt in the later stage, the speed could be regarded as relatively zero.

But interestingly, there are two solutions at this time.

One is that the two-stage rocket can be improved, and it is much easier to increase speed at this altitude than the first-stage rocket to send the spacecraft near the Kármán line. The second idea is that the atmospheric concentration near the Kármán line is quite low, close to a vacuum, and when Yu Ze continues to lift the rocket model to an altitude of 100 kilometers, he can easily assist the rocket model to accelerate without atmospheric interference.

And when the speed of the rocket model is getting faster and faster, the equalization speed of the rocket reaches the orbital speed, and Yu Ze only needs to overcome the inertial centrifugal force to overcome the influence of gravity, and he will be more relaxed.

As a result, Hong Bin and others on the ground saw that the speed of the rocket model quickly increased to 8.6 kilometers per second, and at this time, if the second-stage rocket was started again, it would be no problem to complete the direct orbit of the low earth orbit.

"The trial was perfect."

Wan Ronglong witnessed the whole process and had to admire Hong Bin's thinking.

"It's a pity, why is there only six years left?"

At the same time, he had to "resent".

If there is no dwarf planet that unscrupulously intrudes into the solar system, if it is a peaceful era, with Yu Ze's ability, it will be able to save a lot of space costs and time, and even train a few more times, and think of a few more ideas and solutions, the first and second propulsion systems can be omitted, and Yu Ze can directly take the spacecraft to the predetermined orbit.

In that case...... I can't imagine what a beautiful scene it was.

End of trial.

Yu Ze reduced the speed of the rocket model, because it was a model, and if it was allowed to enter the atmosphere, it could be completely burned out without causing harm to the ground.

As he was suspended 120 kilometers above the ground, gazing at the earth and the stars, he couldn't help but be shocked by the magnificence and beauty of the universe.

Without the interference of the atmosphere, the cosmic starry sky is so beautiful, both in brightness and quantity, far stronger than when seen on Earth.

"Such a beautiful starry sky, but it is not something that ordinary people can see with their own eyes."

Yu Ze was in a spacesuit, stretching his arms, and he couldn't really touch the space.

After admiring the beauty of space for a while, Yu Ze felt a kind of loneliness and fear again.

Although the starry sky is beautiful, it is not the home of human beings, and it still poses great dangers, and without the protection of the earth, human beings cannot survive in the starry sky for a long time.

So how lucky it is for humans to own the earth.

But soon, this shelter is about to disappear, and humanity will face the real danger, the malice from the deep space of the universe.

And human civilization is currently too immature, so immature that it does not have the strength to deal with this kind of danger and malice, if there is no Yu Ze, the current idea of preserving the fire of human civilization cannot be proposed, let alone the real implementation plan.

"Let's go back."

Yu Ze turned his head to reduce his orbiting speed and fell towards the surface of the earth.

In order to prevent a thermal barrier during re-entry, he needed to reduce the speed of his fall, and it took him a little more time than he had ascended to reach an altitude of 10,000 meters above the ground.

It's just that what he didn't expect was that he rose from the Badain Jaran Desert not far from Jiuquan, flew a distance in space, and when he landed on the surface and used Beidou to locate it, he actually arrived at the eastern edge of the Kubuqi Desert, which is not too far from Baotou.

If you want to wait for Hong Bin and Wan Ronglong to come by car, the fastest to take the G6 highway will take more than ten hours of driving, spanning a thousand kilometers.

(End of chapter)