At 8:45, the rocket conducted its last round of self-tests before launch.

The launch center was connected to the capital, and Academician She, the general director of the Dawning Project and the commander-in-chief, appeared on the screen.

Yun Hongjun: "Report to the commander-in-chief, all the sensors of the whole arrow are normal, the line communication is normal, the weather conditions are good, you can continue to launch the program, please instruct!" ”

"The launch is on schedule!"

The connection process was very short, but everyone in the control room saw the seriousness on Academician She's face.

As the time passed, the launch time was slowly approaching, and in addition to the voice of the announcer that sounded from time to time in the launch center, only the sound of inhalation remained.

Hundreds of thousands of spectators from several countries on the beach in the distance also gradually quieted down, waiting for that moment.

Zhou Qingfeng sat cross-legged on the chair, his grandfather Zhou Rui was at school, and he watched at home alone.

Although he is only a sixth-grade elementary school student, in his grandfather's plan, he will definitely be able to enter Southern University of Aeronautics and Astronautics in the future, and he can also enter Xinyuan and become an engineer and astronaut.

His favorite thing to do every week is when his grandfather's colleague flies at Hushan Airport, he puts the child in the back seat and overlooks the earth and the blue sky on the Caiyun trainer plane.

Three minutes before the launch, the last words on TV came from the news studio:

Moderator: "This launch is an early test ship of a new generation of manned spacecraft, which is a test ship for secondary use, which will once again verify the reliability of the spacecraft and the stability of the Long March 10 rocket. ”

Sixteen,000 kilometers away, in Claire's office, the curtains had been closed, and only the screen glowed blinding white in the night, but he didn't realize it, just staring at the rocket and the countdown number in the upper left corner of the screen.

“ten、nine、eight…… Booster engine starts.”

When the huge flow of water flooded the engines at the bottom, the eight YF130 engines of the four boosters of the Long March 10 ignited first, and the flames touched the cooling water and immediately programmed the fog mass to expand violently in all directions.

"Three, two, one!"

"メインエンジン始動します(Main Engine Start)!"

In the countdown of many Chinese languages on the beach, 10 YF130 staged combustion cycle liquid oxygen kerosene engines with twin combustion chambers were all started, and each of the 20 vents had more than 240 tons of sea-level thrust, which merged together to form an orange light cluster, completely covering the launch pad.

Even though the sun had already risen, people still felt the second sun in front of them even more dazzling, and the light of the orange flames shone on everyone's faces, reflecting the red.

Seryov got up and walked to the window of the launch center and saw the rising star in the distance.

The 10 YF130s, which took only eight months to finalize, are unusually stable, the thrust difference of the 10 engines is no more than 0.5%, and the control computer hardly needs a yaw nozzle, and the rocket can climb steadily upward.

Since the four boosters of the Long March 10 are the same as the core stage, similar to the strengthened CBC, the thrust-to-weight ratio is very high at 1.41, and the ascent speed is much faster than that of Xinyuan-3.

The engine, which has reached 106% working condition, has already output a total of 5,100 tons of thrust at this time, and it is not the first time that the audience can feel the familiar earthquake, and even because of the sound waves in the air, the whole body is shaking from the inside out.

Until it flew over the clouds, the Long March 10's flight attitude was extremely stable, reaching a speed of Mach 7, which caused a flowing sonic boom cloud to be formed at the position of the booster cone in the middle of the rocket body.

The air flow backwards along the body of the arrow, but it is propped up and diffused by the engine's tail flame at the tail, which is clearly shown in the camera.

For a full 150 seconds, it was already difficult to see until the ground, and the rocket didn't seem to have any accidents.

Claire stared at the arrow tightly, and couldn't notice anything abnormal.

At the 190th second, the fuel of the four boosters ran out, the explosive bolts of the separators were energized, and with the slight vibration of the core stage, the four boosters fell to the ground in a cross.

"Korolev Cross!"

Hearing someone say this term in a small voice, a smile tugged at the corner of Seryov's mouth.

After another 10 seconds, the fuel of the first stage of the core was also depleted, the two YF130 engines were shut down, and the first stage was disengaged.

At this point, the tense atmosphere at the launch center had begun to dissipate and gradually became more relaxed.

Only a few people remained glued to the screen, staring at the ignition of the second level.

In 200 seconds, four YF-77 hydrogen-oxygen engines of the second-stage and third-stage combination that had been sent out of the atmosphere by the first and a half stages (the booster is generally counted as half a stage) ignited.

At this time, thrust is no longer the main factor, YF77 more than 400 seconds of specific impulse can directly send the third stage and the payload all the way to the lunar orbit, and the thrust is not small, four YF77 a total of 280 tons of thrust is quite powerful.

According to the process of this first flight, the second-stage rocket will only work for a short time, and after completing the test, it will separate and fall into the atmosphere, and the remaining three-stage rocket will use two YF77s to send the test spacecraft into orbit for testing, and it will also turn around and return after 24 hours.

Victory is at hand.

Even Yun Hongjun breathed a sigh of relief and was about to wipe his sweat when a voice sounded in the control room:

"The 5A engine is abnormally shutting down!"

The engine number of the Long March 10 is 0 in the core stage, the four boosters are 1 to 4 in turn, and the second stage is the number 5, and then it is divided into four engines.

Now the second stage rocket has one YF77 closed.

At the same time as this happened, in the camera footage at the tail of the second stage rocket, the tail of the turned off engine seemed to have something flying out.

Everybody knew that it was part of that engine.

This indicates that the flight computer found that the 5A engine had a catastrophic failure, and in order to avoid affecting the remaining four engines, it was directly shut down, but there was still an accident at the level of spraying parts.

Among the experts sent to the scene in Qiongzhou by the Sixth Academy happened to be Liu Minglu, the deputy chief engineer of YF77, and his heart chuckled at this time.

Due to the shutdown of the 5A engine, it is necessary to turn off the symmetrical 5B engine in order to balance, and only two YF77s are left to work, although they can still put the load into orbit, but they can no longer be pushed into the lunar orbit.

It only burned for less than 20 seconds before it failed, and you must know that the YF77 needs to work for a total of 420 seconds, and even needs to consider multiple start-stops.

With the current quality, can the moon mission be successfully completed?

When the people around focused their eyes on Liu Minglu, the latter just kept repeating three words:

"Turbo pumps, turbo pumps...... It must be a problem with the turbine pump, the liquid hydrogen is too cold and the erosion is too strong, and it should be tested more. ”

At this time, Claire, who was already about to turn off the computer and go to sleep, also found that something was wrong, and on the animated simulation route in the live broadcast screen, the orbit of the upper stage rocket had been abnormally offset.

In less than a minute, he knew what was happening.

Even if two YF77s are enough to complete this first flight mission, the Long March 10 in this state is obviously unable to send the spacecraft assembly to the moon.

The first flight of the Long March 10 can only be regarded as a success.

Claire closed her eyes and looked up to thank God, and finally fell asleep sleepily.

Back to the single state~ From now on, the woman is a passerby, adjust the state, all for the sake of updating

(:3っ)=≡=-∴’Σ[______]

(End of chapter)