The dawn of dawn was gorgeous, and Guo Yue, Gu Song and Jian Yushu were standing in the control room together.

This is the small control room next to the test launch site, and three people stand by the window and watch the rocket standing alone there in the distance. The sun has not yet shone here, and the distant mountains and the morning glow reflect the rockets in the distance, making it a breathtaking painting.

"Can it succeed?" asked Jian Yushu.

"Is there any reason for such a small experiment to fail?" Gu Song disagreed.

He also knew that there was no way to do it in one step, and the steps were too big for Guo Yue to play with. But the original plan, even if the load into orbit test is not carried out, at least the rocket has to fly to a certain orbital altitude, and then recover.

As a result, at Guo Yue's strong request, he still changed to fly up and land.

If it weren't for Gu Song's repeated emphasis and the loud noise of the banknotes, it is estimated that this test would only fly up a few hundred meters and then fall.

Isn't that a small cannon fight?

Now, get ready to fly 5 kilometers high, then hover for 1 minute, and then reclaim at a fixed point.

Just such a small test is enough to make the people in the control room nervous.

Because of the groundbreaking!

Because there is no need to enter orbit, it does not matter whether it is a suitable launch window or not. The reason why it was chosen in the early morning is nothing more than to look at the meteorological situation, and the observation conditions and wind speed and direction at this time today will be more suitable.

"Countdown to launch, 5 minutes ready!"

The quiet voice of the firing commander made all three of them a little nervous.

Even Gu Song, although he was full of confidence, when it was time to see the real chapter, he was a little afraid that he would be disadvantaged.

After all, who knows, there will be accidents?

Maybe a small part problem will cause the launch to fail.

Time passed minute by minute, and on the side of the launch platform, this small rocket did not have complicated pre-launch preparations.

Unlike large rockets, from production and assembly, to delivery to the launch pad, to refueling and final monitoring, and then gradually opening the fixtures before launch. This little rocket, standing there, just waits for it to be ignited and launched.

The main thing is to test the engine of multiple ignition, as well as the rocket attitude control system, whether it can be launched into the sky, hovered, and successfully landed and recovered.

"2 minutes to prepare!"

It was quiet in the control room.

The staff responsible for data monitoring and recording have entered the state.

"1 minute ready!"

Everyone was focused.

The trial will only last a few minutes, but every minute and every second is very anxious now.

"A 30-second countdown. 30，29，28……”

Every second countdown, there will be a specific operation process waiting for the staff to execute.

Before the rocket launches, a rigorous countdown process ensures that every step of the process is prepared and checked. Once a problem is found, or the real-time data feedback deviates from the previous digital drill or physical drill, the launch can be aborted in time.

After all, there is no turning back from the bow. As long as the ignition has not been fired, if the problem is found, everything can be tried to be undone.

If it has been ignited, it is success or failure, and it is no longer so controllable.

The current technology can only do this, which is no way to do it.

For expensive rocket launches, the countdown phase is just as important.

“10！”

“9！”

“8！”

……

Finally, the most tense moment has arrived.

With the commander's order: "3, 2, 1, ignition!"

Not far away, the tail of the rocket instantly erupted with high-speed flames. Even if he was so far away, Gu Song felt a faint feeling of heat, and his palms began to sweat.

The rocket flew slowly at first, and then quickly picked up.

The tail flame seemed to be longer, and in the control room behind him, a dense exchange sounded.

"Orbital!"

"The inertial navigation system is normal!"

"Program turn begins!"

……

Gu Song, Guo Yue, and Jian Yushu could only look up at the gradually rising rocket.

No cheers, no excitement, more anticipation.

Before each rocket is launched, the orbit is calculated.

The change in the position of the rocket is determined by the thrust and the attitude of the rocket. On the premise that the launch orbit has been set, the central control computer will output signals to control the servo mechanism of air rudder, gas rudder and vector nozzle according to the navigation data and the real-time attitude data transmitted by the inertial navigation and other instruments on the rocket to ensure that the rocket maintains the orbit data as much as possible.

Now that the rocket has lifted off, the control system is doing its best to maintain the attitude of the rocket so that it can fly along a predetermined trajectory, fly to a predetermined altitude, and then ......

"Real-time altitude 4683 meters!"

"Reduce the thrust!"

"Real-time altitude 4986 meters!"

"Vector control starts!"

Gu Song stared intently at the small bright spot in the sky.

The hovering link of this test is of little significance in the real rocket recovery process. More so, it's to test the ability to control the engine.

If you want to achieve rocket recovery, it's like the original rough skill mode, but also with exquisite positioning and delicate micro-manipulation.

All this must be achieved through the precise control of the rocket attitude by the rocket central control computer program.

"Real-time altitude 5008 meters, 5009 meters, 5008 meters ......"

Listening to the data constantly reported behind them, what Gu Song and the three of them saw in their eyes was a small bright spot like a small star in the early morning sky, standing motionless.

It seemed as if a long time had passed, and the moment the predetermined time target was reached, the commander shouted, "Start descending vertically!"

The muscles on Guo Yue's face trembled unconsciously, the first two steps should have been completed, and the most critical link came.

"Height 4963 meters!"

"4608 meters!"

"Deceleration in the high-altitude section!

"Propellant sinking is normal!"

"Buffer bracket unfolded!"

"Second ignition!"

"Enter subsonic speed, speed 322 meters per second!"

In the eyes of the three, the rocket had come back quickly.

Unlike when it was launched, it was faintly visible that the tail of the rocket had four legs unfolded, which was the buffer support.

"The track deviates by 89 centimeters!"

"The height is 983 meters, the speed is 76 meters per second!"

"The engine ignites for the third time!"

"The track deviates by 16 centimeters!"

"Height 267 meters, speed 23 meters per second!"

Although skinny, the rocket is already clearly visible. It's a little far away, and it doesn't seem like it's going fast to see how fast the rocket is descending.

But now the most critical time has come, at the moment when it is about to hit the ground, the engine will be ignited one last time, counteracting the speed of the final rush to the ground, and maintaining the attitude of the rocket.

Only when this step is successful, the buffer bracket will be able to support the rocket without excessive shift in the center of gravity, and there will be no explosion due to excessive speed!

"20 meters in height!"

"Fourth ignition!"

At this point, everyone was staring at the rocket in the distance.

I saw a brilliant fire erupting from the tail of the rocket, and the speed of the rocket's descent was obvious.

They couldn't see the subtle currents of air that the other vents used to control attitude, but the rocket slowed down and landed on the launch pad. It shook for a moment, and then stood firmly!

The rocket engine was turned off, and only some smoke and dust were left in the distance.

There was silence in the control room.

One second, two seconds, three seconds......

Suddenly, there was a burst of cheers in the control room!

Guo Yue hugged Gu Song's shoulders fiercely, and laughed loudly: "It's successful! It's successful!"

A smile bloomed on Gu Song's face.

Though it was only the existence of the two kicks, the first test was successful.

Jian Yushu looked at Gu Song's eyes excitedly, in his opinion, this was the first step taken by Flint Aerospace towards the sea of stars.

Gu Song looked at the small rocket that had just made history in the distance, but he seemed to see a future with a greatly improved carrying capacity!

Speed up the pace of experiments, and hurry up to get the rocket upgraded is serious!

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