Military Technology

Chapter 2366 The arrow fell into the sky (Part 1)

One hundred seconds countdown to primary and secondary separation.

One hundred seconds to prepare!

On the big screen, the red numbers on the countdown board kept flashing, reminding everyone that their work was about to officially begin. Although the first-stage rocket and fairing will not land at the Yatuhai landing site this time, the remote control of the first-stage rocket and fairing will be handed over to the command and control management center of the Yatuhai landing site. .

Although this is a first-stage rocket body that has been successfully recovered six times, the measurement and control team in the command and control management center hall still dare not be careless. At this moment, they are watching the big screen with all their attention, paying attention to the various aspects of the main rocket. Item data changes.

Typically, the first stage separates between one hundred and two hundred seconds. This is mainly based on the size of the first-stage rocket, which determines the amount of fuel, the thrust of the engine, and the orbital heights to be launched, so the working time of the first-stage rocket also varies. For this mission, the first-stage rocket has to work for one hundred and sixty-seven seconds.

It takes almost three minutes, so during these three minutes, the entire measurement and control team needs to focus on the data information for fear of omissions and misinterpretations.

One minute to separate and prepare.

At this moment, the rocket has risen to high altitude. Through the optical telemetry imaging screen, everyone can clearly see the rocket and the tail flame at the tail. In fact, at this altitude, the optical telemetry equipment has very limited ability to observe the rocket body, so the main purpose of this process is to observe the working status of the engine at the bottom of the first-stage rocket.

To put it simply, observe the tail flame emitted by the engine. Under the complete condition, the tail flame should be ejected in a stable combustion without any fluctuations. Only when the engine fails, the tail flame ejected will naturally have an impact, which is extremely conspicuous in optical infrared observation equipment.

Thirty seconds!

Ten, nine, eight...three, two, one, first and second level separation.

With the announcement from the Northwest Space Launch Site, the successful separation of the first and second stages of the rocket can also be seen on the big screen.

Yatuhai, the first stage rocket has successfully separated, and the remote control rights are handed over to you.

Yatuhai received it!

The large screen in the hall is divided into two halves. One half is the previous monitoring interface, including the Jianmu-2 rocket that has been successfully ignited and is pushing the load to continue to rise, as well as the various measurement and control data synchronously transmitted back from the Northwest Launch Site. data.

The other half argued for the first-person view captured by the surveillance camera on the landing first-stage rocket body. In the picture, the rocket's grid plate was successfully opened, and the rocket began to be controlled to adjust its attitude in the air, and then landed as shown below.

Further below is a yellow desert, with some faint outlines of towns, roads, and lakes visible. In the distance is a hazy semicircular blue skyline, and even higher is the deep blue sky.

This time, the first-stage rocket body uses the latest improved technology, which is to get rid of the previous technical means of the first-stage rocket body of the Jianmu-2 rocket, which required parachutes to decelerate at medium and high altitudes.

This time, the first-stage rocket body of the Jianmu-2 T-type rocket has been upgraded and transformed, so that it can have the same characteristics as the first-stage rocket body of the Jianmu-7 rocket. During the entire return process, the rocket engine is ignited. Recoil deceleration.

This change makes the return and landing of the first-stage rocket body more direct and does not require so many movements. In addition, it also saves the space and weight of the parachute bag, which can carry more fuel and increase the overall rocket's carrying capacity.

And compared with other return-type reusable first-stage rockets, this first-stage rocket, including the new first-stage rocket of the Jianmu-7 series rockets, adopts a linear descent method that gradually decelerates. Simply put, the rocket’s The engine does not start 100% from the beginning and then decelerates the rocket.

That's not the case. The thrust of the rocket's vector engine may be only 5% at the beginning, and then the thrust will increase little by little as the landing altitude changes. Wait until about fifty meters above the ground, the thrust reaches 98%, then continue to accelerate, wait until one meter above the ground, the thrust rises to about 99.5%, and then slowly land, The rocket engine shuts down.

The advantage of this is to save fuel, which can greatly save the fuel consumption of the rocket during the landing process, and continuously decelerate the rocket at a minimum cost. Another big reason is that the faster speed at the beginning makes it easier for the rocket to control its own landing attitude, avoid being affected by mid-to-high airflow, and can greatly shorten the entire landing time.

The No. 2 report from Landing Site No. 1 showed that the first-stage rocket was 3,000 meters above the ground. The landing attitude was normal, the landing speed was normal, and the landing gear was open normally.

Yatuhai understands.

Landing Site No. 1 reports that the landing site area is clean, the ground wind speed is one meter, the humidity is suitable, and landing is possible.

Yatuhai understands.

As the height of the first-stage rocket continues to decrease, the numbers on the big screen also continue to decrease. The entire speed changes very quickly. In the blink of an eye, the height of the rocket from the ground is only a thousand meters.

At this time, two drones were hovering in the high altitude of the No. 1 landing site. Through the lens on the drone, the rocket during the entire landing process could be watched more closely.

The two drones also received the command and immediately flew towards the rapidly descending first-stage rocket.

Through the drone lens, everyone can clearly see that the grid wings on the first-stage rocket are constantly changing, controlling the flight attitude of the rocket.

Five hundred meters, three hundred meters, one hundred meters!

The landing speed of the first-stage rocket body is getting slower and slower. Finally, the long tail flame ejected from the first-stage rocket body blows up dust on the ground, and the rocket is also covered by these flying desert dust.

The rocket slowly landed close to the ground. As a burst of white smoke rose, the first-stage rocket landed smoothly on the landing site.

OK, bang bang bang bang!

There was a burst of warm applause at the scene. For the entire first-stage rocket reward recovery measurement and control team, their main task has been completed. Next, we only need to cooperate with the on-site rocket recovery and transportation technical team to transport the first-stage rocket body to the rocket workshop of the northwest R\u0026D base for maintenance, storage, and waiting for the next mission.

Wu Hao naturally took the lead in giving warm applause for completing the recovery mission of the first-stage rocket so beautifully. Yu Chengwu and others on the side also applauded when they saw this.

Just when everyone was laughing and admiring, the original first-stage rocket measurement and control screen on the big screen was switched. In the main window screen, two huge red and white parafoils were soaring in space with two fairings. stand up.

In a window screen, three orange helicopters have begun to hover in the sky, waiting for the arrival of the target.