Chapter 2368: Arrows Falling into the Sky (continued)
【Revision】
Therefore, there are new requirements in the design and materials of the rocket body. The rocket body will not crack and expand due to the influence of airflow after being subjected to minor trauma, and the rocket body material must also have a self-healing property. That is, after being subjected to such
It can heal itself after trauma, so that the fuel in the arrow body will not leak out.
In fact, they have already used this self-healing material in the Oasis 1 inflatable experimental chamber, but the materials on the spacecraft are still very different from the materials on the rocket body.
The materials on the rocket body need to be as light as possible, and the characteristics of the materials themselves will be different depending on the scenarios they are used in. To this end, the Materials Laboratory and the rocket project research team have specially developed a method that can be used in
New self-healing materials for rocket bodies and internal fuel storage tanks.
This material is very thin, only a few millimeters. It can be sprayed on the entire inner wall of the rocket. When the rocket body is damaged and this material is broken, the material will gather towards the window due to pressure friction and air, and eventually
Block the wound and achieve closed 'self-healing'.
Similarly, it can also be sprayed on fuel tanks, so that when the tank is damaged, it can be repaired in time.
And this undoubtedly increases the overall weight of the second-stage rocket. Although it accounts for a small proportion, it also takes away the weight of the load, so it can only be made up from other places.
Therefore, in order to balance the weight and strength of the rocket body, the project technology research and development team worked hard for a long time to overcome it.
As the lag on the big screen returned to normal, everyone finally saw the first-person view through the surveillance camera outside the secondary rocket body. At this moment, the flying wings on the rocket body had been opened, and the entire rocket body was gliding rapidly in the air.
The thermal insulation material on the rocket body has been ablated to a green ocher color, and has fallen off in many places. However, judging from the data transmitted from the external camera of the rocket body and the rocket body sensor, the entire rocket body is still intact.
, and this finally made everyone feel relieved.
Everyone in the hall couldn't help but applaud, because the most dangerous period has been passed safely, and now everyone is looking forward to the next critical moment.
Throwing a parachute, although this is a small action, is crucial. At such a speed, whether the parachute can be thrown smoothly is the focus of everyone's attention. In addition, after the parachute is thrown, it must be gliding.
The rocket body will decelerate, and the attitude of the entire rocket body will be adjusted through the deceleration chute and the flying wings and grid wings on the rocket body, changing the inclined gliding trajectory into a large-angle downward parabolic trajectory.
The countdown numbers on the big screen are constantly decreasing, and everyone is concentrating, holding their breath, waiting for the last moment to arrive.
"Three, two, one, throw the parachute."
Many technicians who understand the entire process can't help but count down silently.
The screen flickered as several objects were thrown out with cables attached and quickly opened. Three small parachutes opened in series, which also caused the rocket body's descent speed on the screen to rapidly decrease.
"Put the wings away!"
As the drag parachute was thrown, the gliding wings of the second-stage rocket began to retract, and the grid plate was adjusted, causing the rocket's attitude to be removed from the previous one, slowly increasing the angle, and turning into a large-angle downward attitude.
"The parachute is disconnected!"
After completing this series of actions, the parachute lost its function and then disconnected automatically.
"Main engine ignition successful!"
Following this announcement, warm applause rang out again in the hall, and this most critical step was completed.
You must know that the two most thrilling stages in the entire process are one is the re-entry flight, and the other is the ignition of the main engine. Once the main engine is damaged or encounters a malfunction during the descent, resulting in ignition failure. Then this
A two-stage rocket will directly hit the entire range like a ballistic missile, and may deviate, and may land right on top of the command and control center of the landing site.
There is still residual fuel in this second-stage rocket, plus its own weight and gravitational acceleration, its power is really no less than a powerful missile. Even if they are safely evacuated to the underground shelter by then
, then the losses caused will also be huge.
"Mr. Wu, the outdoor viewing effect will be better. Do you want to go outside?" Yu Chengwu on the side smiled at Wu Hao and suggested.
Wu Hao smiled when he heard this, looked at the excited people around him, then stood up and said with a smile: "Okay, then let's go to the rooftop to witness the arrival of this great moment in person."
Immediately, surrounded by a group of people, Wu Hao and Yu Chengwu walked out of the hall and walked towards the central rooftop.
When we arrived at the rooftop, there were already many staff from the center on the rooftop, including chefs from the canteen, cleaning aunts, and other staff. After seeing Wu Hao and the others, they all greeted Wu Hao enthusiastically.
In order to make it easier for these people to watch, two large screens were thoughtfully erected on site, which simultaneously broadcast the rocket's telemetry tracking footage on the large screen in the hall in real time.
Wu Hao and the others came to an observation position with an excellent view, which was actually the position where he watched the starry sky last night. Standing here, they can have a panoramic view of the entire Yatu Lake Basin, and the landing site and coordinates in the distance are also clearly visible.
Through the picture on the large screen at the scene, Wu Hao and the others could clearly see that the rocket was already over the Yatu Sea. Because the surveillance cameras on the second-stage rocket body had been arranged to the ground scene. The optical sighting equipment on the rocket body
, has been able to automatically capture reference marks on the landing field.
"It's coming, isn't it?" Suddenly someone shouted loudly at the scene.
Following this man's gaze, everyone saw a bright spot high in the sky.
"Yes, yes, this is our rocket."
"Where does it shine?"
"That's the tail flame at the tail of the rocket and the reflection of the sun."
…
Under the gaze of everyone, the bright spot became bigger and bigger, and Wu Haonei was able to see it more clearly with the help of a telescope.
The entire rocket body can be clearly seen. The words "Haoyu Aerospace" on it have been somewhat damaged due to the burning caused by re-entry into the atmosphere, and the bottom of the rocket body has been blackened.
Close, close, under the eager gaze of everyone, the rocket is getting closer and closer to the ground.
Rocket's entire body was also in everyone's eyes. Although they were far apart, everyone at the scene saw it very clearly. Many people took out their own shooting equipment, wanting to record this precious moment.
In the telescope, Wu Hao saw what he saw more clearly. He saw that the speed of the rocket was getting slower and slower, the tail flame of the engine was getting longer and longer, and the huge roar could be heard even eight or nine kilometers away.
Under the gaze of everyone, the rocket's tail flame blew on the landing site, kicking up dust. A burst of white smoke rose, and the rocket landed smoothly on the landing site.
