Military Technology

On the large screen set up on the side of the hall, the surveillance cameras on the two boosters, including the surveillance camera on the core first-stage rocket, simultaneously recorded the separation of the boosters.

As the boosters separate, the grid wings on the two boosters open and continuously adjust their angles to control the height of the two boosters.

The ground recovery team reported that the landing status of boosters No. 1 and No. 2 was normal and they were landing according to scheduled procedures.

The first stage rocket shuts down and the first and second stages separate!

About ten seconds after the two boosters separated, the first and second stages of the Jianmu-9 rocket began to separate.

According to convention, booster separation and primary and secondary separation are generally carried out one after another, with an interval of maybe one or two seconds. But this time, the two boosters separated first, but the first and second rockets separated after more than ten seconds. The main reason for doing this is to provide sufficient power for the ascending rocket, so that the second-stage rocket can save more fuel and send the load inside the fairing, that is, the lunar cargo transportation system farther.

Of course, this also brings a disadvantage. After all, the core first-stage rocket and two boosters of Jianmu-9 are the same. It also means that the amount of fuel they fill is the same.

Generally speaking, in order to ensure that the first-stage rocket can land smoothly and safely, a part of the fuel will remain in the first-stage rocket after separation, so that the rocket engine can ignite and maintain continuous deceleration for the landing rocket.

The rocket does not rise in a straight line, but at a certain angle. This also means that the first stage of the rocket must adjust its angle to fly back from a distant high altitude when landing. Therefore, more fuel is needed for attitude adjustment and slow down.

Because the core-stage rocket burned for about ten seconds longer, the fuel reserved in the core-stage rocket was no longer enough to support the core-stage rocket to return to the landing site on land.

So at this time, the sea landing platform comes into play. Its position is just below the separation of the core first stage rocket. In this way, the rocket does not need to make too many adjustments and can land directly. In this way, the rocket does not need to reserve So much fuel.

It should be said that every ballistic flight path of the rocket, including the rocket's system control, has been carefully calculated, and a certain amount of redundancy has been reserved. It cannot be said that the design is just right. This is impossible.

The large screen on the side of the aerospace command and control hall is divided into three parts. These three parts respectively display the respective status and related data information of the core first-stage rocket and the two boosters, as well as monitoring images.

The two boosters and the core first-stage rocket began to land from the sky respectively. Compared with the farther core first-stage rocket, tourists who gathered around the Nanhai launch site to watch the launch could already witness the beginning of two light spots. Falling down.

On the big screen in front of the command and control hall, there is a picture of the second-stage rocket pushing the load and continuing to soar upward. However, at this moment, the Zhanjiang No. 1 remote sensing equipment could only capture a faintly whistling columnar bright spot, and the picture began to become blurry.

Suddenly, the front end of this pillar-shaped bright spot flickered, and two objects were seen falling off the bright spot.

The external surveillance camera on the lunar cargo transportation system in the fairing also captured this scene. The camera's picture froze for a moment, and then a white object blocked the line of sight, and the entire picture turned black.

】

Throw the fairing!

Position 1 reported that the two halves of the front-end fairing of the second-stage rocket were successfully thrown!

good!

There was another burst of warm applause from outside.

The so-called layman sees the excitement, while the expert sees the door. Throwing the fairing may seem quite simple, just throwing out the two halves of the protective station, but in fact the action of throwing the fairing occupies a very important part in the entire rocket launch.

We must know that among the many cases of rocket launch failures so far, many of them were caused by the failure of the fairing to be separated and thrown out on time.

In other words, the fairing did not separate successfully, and the rocket pushed the fairing around the payload and was transported into the sky. This also means that the payload inside the fairing, such as a satellite or other spacecraft, cannot deploy the solar wing battery sail normally, cannot recharge itself, and cannot adjust its flight attitude, so the entire mission completely fails.

This time, the huge fairing of more than 20 meters on the Jianmu-9 was very difficult to separate, and it was able to be separated and thrown normally, which gave the rocket team a sigh of relief.

Although they have tried this countless times, no one knows the results until the end. After all, there are too many unpredictable factors in real flight missions.

"The air recovery team has arrived in the scheduled airspace and is on standby, and the drone is about to arrive in the scheduled airspace!"

The second-stage rocket began to push the lunar cargo transportation system to continue flying, and the images returned by the external camera of the lunar cargo transportation system suddenly began to brighten, and a dazzling light appeared on the edge of the arc-shaped skyline. The light is the sun.

On the other side, as the height of the two boosters gets lower and lower, the jet intensity of the tail flame of the booster's tail engine becomes stronger and stronger, and the sound naturally becomes louder and louder.

But this could not stop the enthusiasm of the tourists at the scene. Watching the two boosters falling from the sky begin to slowly land, all the tourists and spectators watching cheered.

Accompanied by the cheers of the crowd, the two boosters slowly landed and landed smoothly on the two circular landing platforms at the landing site.

In various live broadcast rooms and TV channels, the scene at this moment also switched from the roadbed landing site to the sea landing platform. I saw that the entire sea landing platform was brightly lit, and the circular landing field above the landing platform was also brightly illuminated by the lights.

Through the external surveillance camera on the core first stage rocket, it can be clearly seen that the core first stage rocket is getting closer and closer to the brightly lit sea landing platform floating on the sea.

Finally, in a burst of smoke and dust, the core first-stage rocket landed smoothly on the sea landing platform. The two robotic arms on one section of the landing platform immediately turned around, firmly protecting the entire core and first-stage rocket body. This prevents the rocket body from tilting and fading due to undulating sea waves or strong sea winds.

The landing scene here had just ended, and before they could take a breather, the live broadcast screen was once again switched to the scene of the aerial recovery team.

From the infrared low-light picture transmitted back by the drone, it can be seen very clearly that the two halves of the fairing are mounted under the two parafoils, one behind the other, gliding slowly in the air.

At the same time, three helicopters were on standby in the distance and began to fly toward the two fairing halves.