In fact, this deceleration module is not a new technology, but a new use of old technology. It is the parachute deceleration technology originally used on the Jianmu-2 reusable launch vehicle. This technology was initially used on their Jianmu-2 launch vehicle. As their new generation of reusable vector engine technology matures, this rocket parachute deceleration technology has gradually been phased out and has instead become used in other commercial applications. The hot cakes of rocket companies have been copied by space agencies and commercial aerospace companies in many countries.
The purpose of this application to the Jianmu-9 core-stage rocket is to allow the core-stage rocket to consume as little fuel as possible during the descent and deceleration process, thereby saving fuel and allowing it to fly for an extra twenty seconds.
After all, using a parachute to slow down and using the thrust of a rocket engine to slow down have the same effect, which is to slow down the landing speed of the rocket.
Although this parachute deceleration technology is an old technology, Zhou Xiangming and Chang Zhifei have also made many innovations in this technology.
For example, the parachute deceleration module used this time is not directly installed on the core first stage rocket body. Because if installed on it, it will directly destroy the integrity of the core-level rocket body, and the internal layout of the core-level rocket body may have to be redesigned, and even the center of gravity of the entire rocket body will shift.
So Zhou Xiangming, Chang Zhifei and the others took a different approach. Instead of working directly on the core first-stage rocket, they designed the parachute deceleration module as a separate module, which can be regarded as a separate first-stage body of the rocket.
When needed, just install it directly in the middle of the first- and second-stage rocket bodies. If not, it can be removed directly without affecting the core first-stage rocket and the second-stage rocket.
Moreover, the entire module is very small and light, with a height of only more than one meter, so it does not take up much load weight.
When the first and second stages of the rocket separate, it is not the separation between the first and second stage rockets, but the separation of the parachute deceleration module on the core first stage rocket and the second stage rocket.
This parachute deceleration module will land with the core first-stage rocket, and will throw out the deceleration parachute inside during the landing process to decelerate the entire rocket.
In order to reduce the weight as much as possible and require these parachutes to withstand the huge weight of the core first-stage rocket, this time they used a new material with the help of the Materials Research Institute of Haoyu Technology. This material is very light and thin, but has very high strength and very good tensile resistance. A parachute of the same size using this new material will weigh only one-third of the original speed parachute. It can be said to be very light.
It is worth mentioning that this parachute deceleration module will not directly land on the sea landing platform with the core first stage rocket. Because the wind speed at low altitude over the sea is relatively high and the area of the parachute is relatively large, it is easily affected by the wind direction, which will lead to poor landing accuracy.
The area of the sea landing platform is so large, so in order to control the landing accuracy of the core first stage rocket. This parachute deceleration module will detach at a low altitude of about one thousand meters to a few hundred meters, and then the core first-stage rocket will land on its own, and the accuracy of the entire landing will be controlled in the process to ensure that the core-stage rocket can land successfully. On top of the sea landing platform.
As for the parachute deceleration module, after losing the weight of the core stage, it will slowly fall to the sea and be handed over to the waiting ship for recovery.
Don't look at just adding a parachute deceleration module, which involves a lot of technology. For example, after adding such a module or rocket body, will the center of gravity of the entire rocket change, and will the rocket's flight control be affected?
In addition, at an altitude of one thousand to several hundred meters, after the core first-stage rocket is separated from the parachute deceleration module, how can the thrust of the rocket engine be adjusted in time at such a low altitude and such a close distance, and how can the landing of the rocket be controlled in a timely manner? Angular direction, this is a problem.
Therefore, as soon as this technology appeared, it quickly attracted the attention of the entire world's aerospace field. Everyone is scrambling to study this technology and develop their own ultra-low-cost rocket recovery technology.
The domestic aerospace system is also very interested in this technology and has sent a large team of technical experts to study it. After some investigation and study, this team of technical experts also spoke highly of this technology and believed that this technology can also be applied to existing traditional launch vehicles to achieve repeated landing and recovery of rocket bodies. use.
In this regard, Wu Hao and others also selflessly contributed relevant technologies and provided a full set of technical drawings to the aerospace system. This makes the rocket experts of the aerospace system very excited and ready to do something big.
However, as the research deepened, they found that this technology was useless only with drawings, as it required corresponding parts and materials.
Let’s just talk about this parachute. If they use their traditional aerospace parachute, its weight will be greatly increased. Not only the weight, but also the entire volume will be greatly increased, which completely fails to meet the design requirements.
So they finally had to ask for help from Wu Hao and the others, and reached a relevant cooperation agreement with Wu Hao and the others. The other party provided relevant design specifications and drawings, and Wu Hao and others were responsible for producing the relevant parachutes.
In addition, there are other parts. Although aerospace systems can also be produced, the cost is too high. Instead, it will be much cheaper to order from Haoyu Aerospace.
Regardless of these parts, in fact, as the cooperation between Haoyu Aerospace and Aerospace Systems deepens, more and more parts are produced by Haoyu Aerospace. In addition, Haoyu Aerospace has also begun to undertake more space launch and space transportation tasks.
For example, the cost of undertaking the cargo transportation and supply tasks of the space station is only more than half of that of a traditional cargo spacecraft. Therefore, over time, the cargo transportation and supply tasks of the space station have been handed over to Haoyu Aerospace.
In addition, there are some space launch missions. Because Haoyu Aerospace’s price is lower, many scientific research institutions and user units will choose to have Haoyu Space launch, which will save a lot of launch costs.
In addition to these, there are also some professional customized services. For example, the Lunar Cargo Transport No. 3 spacecraft this time is equipped with scientific research and detection instruments from many scientific research institutes.
If it weren't for the need to transport cargo and equipment, and Yu Chengwu and the others tried their best to prevent compression, most of the load of the entire spacecraft might have been occupied by these scientific research and detection instruments.
(End of chapter)
