Because the nearby area has been completely voided, Tengyun broke through the speed of sound at an altitude of less than 10,000 meters, and the whole city could hear a huge movement from the sky, and then see a white trail that was constantly extending.

The extreme hypersonic aerodynamic design makes Tengyun accelerate very fast, and the accompanying J-20B has to turn on the afterburner to keep up with it before it has time to take a few more photos.

However, this only lasted less than three minutes, and after reaching more than 25,000 meters, Tengyun began to inject its own oxygen into the turbopump, so that the turbojet part of the engine has been working in the maximum efficiency range and has been strongly cooled, and the power has not been attenuated at all due to the increase in altitude.

The media photographers next to the airport on the ground obviously hadn't been to the air show much, and they lost the plane several times because they lacked experience in following the plane, and after a few minutes they could only see a small dim bright spot in the sky, like a paint spot on a clear blue background.

Only the deafening sound of air explosions was still heard in the sky, and the snow bird had a supersonic silent design, but Tengyun did not need this, so its sound signature was extremely manic.

Tengyun's general course is pointing diagonally to the equator to the southeast, which makes the southern people who missed the previous flight of the snowbird fortunate enough to feel the shock of hypersonic flight, and it is more intense.

The Yuanwang No. 3 survey ship, which had already been in place, was even more eagerly awaited, and they received a signal that Tengyun had taken off in ten minutes, and the radar had already found the target, but many crew members were waiting to hear the sound.

Finally, about sixteen minutes after takeoff, Tengyun had already flown overhead, and at this time the altitude was close to 72 kilometers, which was the last section of the turbofan mode to work.

Thunderclaps suddenly thundered in the endless sea and sky, like firecrackers, and it disappeared completely after a full three minutes, and the movement was not inferior to that of the rocket launch site, but it had weakened a lot by them, and no obvious vibration was felt on the hull.

However, unlike the irritability on the ground, Chang Lihai has the illusion of sitting in the simulation cabin, because the silence in the cabin is far less exaggerated than imagined.

Perhaps worried about the shock coupling problems caused by 10 engines, Seryov deliberately put a lot of effort into cushioning, and when flying at atmospheric supersonic speeds, it was strangely quiet, although it was still not small, but it was far from the characteristics of the rocket.

However, the process was only about half an hour, and now the time was almost up.

Chang Lihai moved his body slightly to make himself fit more closely in the unloading chair, and confirmed on the radio:

"Now we have a speed of 4845m/s and an altitude of 74900;

After 30 seconds, you will be in the state of flying at the tip of the air, so get ready! ”

"Understood! （！！ ）”

Chang Lihai pressed the button for switching the working mode, and then pulled the rudder back slightly until the pressed button lit up red.

This means manually confirming that the elevation angle is ready for orbit entry, and that the rest of the orbit entry process is handed over to the computer, which is only used manually in case of emergency.

And that was definitely one of the worst-case scenarios, both manual entry and return meant that all the electronics were finished, and the only thing the driver could rely on was a mechanical navigator and the co-pilot's naked eye observation in addition to the primitive mechanical-hydraulic control system, second only to Gagarin.

After the computer world entered, Chang Lihai's hand left the rudder, and the latter slowly retracted forward at the same time.

After a few seconds, the turbofan parts of the 10 engines were disconnected at the same time, and the original acceleration came to an abrupt end, and the entire cabin became quieter than ever, except for the slight vibrations of the body through the soundproof cotton, except for the whirring and blowing of the air conditioner.

But all four astronauts immediately began to tense their muscles, ready to withstand the acceleration that followed.

It felt like a minute, and 15 seconds later, the liquid oxygen was first pumped through the pipeline into the tip combustion chamber, and then the methane, and naturally ignited due to the high temperature of the converging nozzle.

The thrust of the rocket engine immediately made the astronauts feel the traditional sense of acceleration, but it is still much gentler than the rocket, even if it does not exceed 2.5G at the highest time, it can be borne by any ordinary person who can fly a civil airliner, and it is even more easy for a fully equipped astronaut.

Chang Lihai put his eyes on the sky on the left, which had turned into a deep blue below, mixed with several huge cyclones at the same time, ignoring them and the normal flying ocean.

Only the sky was different from before, it was now infinitely close to black, and the lower half, which was still dark blue, was emitting a soft milky white glow, obscuring the light of the stars.

The clouds are rising in height and decreasing, and the view of the Earth is slowly visible only to the edge of the atmosphere, and the rest is covered with stars.

After about six minutes, the engine stopped working.

Sunlight shone in through the portholes, cutting through the masks of several astronauts in turn, because the airframe was spinning and the computer didn't want direct sunlight to hit the portholes.

The thing in the porthole turned from the starry sky that could be seen in rudimentary form to the earth again, and now the entire sky plane was flying backwards in orbit.

The status light of the console turns from red to green, and the force exerted by the unloading chair on the astronaut disappears, replaced by the feeling of weightlessness.

Chang Lihai gently unfastened the seat belt, and then watched the rope belt flutter wildly with the lock.

Thirty minutes, he should have just arrived at the patrol area before, but now he had crossed Hawaii, patrolling the land higher and farther away.

"Report to the commander-in-chief, I am Dong Qi, I have reached the scheduled orbit, the flight is normal, the crew is in good condition, and it is over."

……

B-level base, Lin Ju, who was trying to paste with the female assistant, flashed information in his mind:

[A single-stage orbiting vehicle has been detected to enter low Earth orbit, number of crew members: 4.]

Under the leadership of the system, your base has succeeded in building an epoch-making vehicle in the history of spaceflight, which will go down in history.

This is a great step forward, which has once again reduced the cost of going to space by an order of magnitude, and the technical level of the vehicle is being evaluated...... Assessment Complete:

Comprehensive evaluation: excellent, although many of its processes and designs are not optimal, but it really takes care of the cost and performance, has higher durability than the pursuit of the ultimate, and has a maturity beyond the times.

Depending on the level of engagement of your base, you will receive the following rewards:

Academic Paper: A Possible Implementation of Quantum Synchronous Communication (Jacky Cheung)

P.S. In order to solve the delay problem of interstellar communication, Jacky Cheung, a famous modern experimental physicist and one of the founders of quantum mechanics, published this article in 1954, and then carried out related research in 7 years, successfully provided usable delay-free synchronous communication equipment for the first human landing mission on Mars in 1969, and won the Herman Meyer Prize in Physics that year.

Note: Long-distance synchronous communication based on quantum entanglement is of great help to space exploration, and is considered in a sense a precursor to interstellar travel, so please strive to make it happen. 】

“……”

"What's wrong?"

Yu Man felt that the shoulder he was leaning on suddenly trembled.

"Nothing...... Well, I almost forgot, it's the new technology that arrives, but it's a fraction.

Damn, why is the world line of the source of technology so crooked this time? ”

(End of chapter)