Military Technology

"The second-stage rocket of this Jianmu-2 fully recovered carrier rocket is folded and hidden throughout the launch phase, which can greatly reduce the drag and reduce the impact of the flying wings on the flight attitude.

When the second-stage rocket enters space and successfully sends the payload to the predetermined orbit, the second-stage rocket begins to adjust its attitude and return to Earth. At this time, the entire flying wing structure will bounce off and begin to glide in the atmosphere.

In fact, at this stage, the flying wing structure is not fully opened, but a semi-open structure, which can be more stable and support the entire rocket body to glide quickly in the atmosphere.

During this gliding process, the flying wing structure will be opened a little bit, and finally it will be fully opened, and the rocket body will be decelerated by rotating the angle of the flying wing.

After passing through the dense atmosphere, a parachute is thrown from the top of the rocket, which then quickly decelerates it before throwing the main parachute. Compared with the main parachute used by the original Jianmu-2. The main parachute area of ​​the secondary rocket of the Jianmu-2 fully recovered launch vehicle is also very small. Its purpose is not to ensure the smooth landing of the secondary rocket, but to reduce the speed of the rocket to a reasonable stage.

Then, using the fuel involved in the rocket body, perform multiple ignitions to continuously decelerate the rocket, so that the speed of the rocket can be controlled in a relatively slow range.

In the final landing and recovery stage, we designed two ways, one is to open the landing frame for landing similar to the first stage rocket. When the rocket is about 1000 meters above the ground, the rocket's engine will ignite for reverse thrust, continuously control the speed of the rocket, and then let it land slowly and steadily on the ground.

The other way is to use two helicopters to mount a chain hook, and then use this rope hook to hang the parachute of the secondary rocket just like we recover the fairing in the air, and then hoist it. Hanging for recycling.

These two recycling methods have their own advantages and disadvantages. The second method seems to be more difficult, but in fact this method is more maneuverable. The first method looks more secure, but it is more difficult to operate and requires higher technical requirements. "

After listening to Zhou Xiangming's introduction, Wu Hao looked at the demonstration video on the big screen, then turned his head and asked, "So which way did you finally choose?"

Zhou Xiangming shook his head: "At present, there is a lot of internal debate about these two recycling methods, so we plan to use two or three rockets to verify it.

In fact, some of our technicians have reservations about the flying wing structure I mentioned earlier. They believe that the design of this flying wing is cumbersome and complicated, and its role is limited and can be completely cancelled. However, some people insist, so we also intend to conduct verification through these tests, and choose and determine the final plan according to the final results. "

Yes, according to your plan, this kind of experiment can be done as many times as possible. Don't rush to make a choice. Wu Hao smiled and nodded.

Zhou Xiangming nodded with a smile, then changed a picture and said to Wu Hao: "In fact, we initially insisted on installing a flying wing structure on the second stage of the Jianmu-2 fully recovered launch vehicle, mainly for the purpose of To verify the reliability of the flying wing structure, we have accumulated technology for our aerospace vehicles.

At present, we have accumulated rich experience in this field through high-speed wind tunnels and re-entry experiments, and have accumulated very useful technical data for the development of our aerospace vehicles. "

The aerospace vehicle project is a major scientific research project aimed at future aerospace development. This project has high technical difficulty and huge investment. It cannot be completed in a short time. We need to be patient and develop slowly. So don't be too anxious about this project. Wu Hao dialed the exit in a timely manner.

Hearing Wu Hao's words, Zhou Xiangming nodded. He naturally knew what Wu Hao meant, but Zhou Xiangming had great hope for this project. So if he can fight for it, he will definitely fight for it.

Seeing Zhou Xiangming nod, Wu Hao looked at the model of the Jianmu-2 fully recovered launch vehicle in front of him and asked, "When will it fly for the first time."

In early July, we had a launch mission to do an experimental launch at the Northwest Space Launch Center. Zhou Xiangming replied,

Wu Hao couldn't help but be surprised when he heard the words: "Isn't that a long time?"

Yes, the rocket has been developed, and the final inspection work before leaving the factory is currently underway. After ensuring that it is correct, we will transport it to the Northwest Space Launch Center in the next few days to prepare for testing and wait for launch.

Oh, then we will wait and see at the Xinyuehu Space Command and Control Center. Wu Hao laughed and joked.

Hearing Wu Hao's words~www.readwn.com~ Zhou Xiangming said confidently: "Don't worry, we will definitely give you a satisfactory answer."

OK, I'm waiting. Wu Hao nodded with a smile, and then said: "This Jianmu-2 is just the beginning. If this secondary rocket recovery technology is successfully developed, we will apply it to our other launch vehicles. Come, it can greatly reduce the cost of rocket launch.

In this way, it will not only help us enter space in the future, but also carry out related deep space exploration projects and other space activities. With low launch costs, it can also strive for a larger commercial launch market and promote the development of the domestic civil aerospace field. "

Speaking of this, Wu Hao turned his head to look at Yang Xiaoyun and said, "How is the preparation for Haoyu Aerospace's listing?"

Yang Xiaoyun has always been in charge of this matter, and Wu Hao has been paying attention. Now that we are talking, Wu Hao simply asks her.

Hearing Wu Hao's question, Yang Xiaoyun nodded: "As the first private aerospace technology company listed in China, our listing work has always received strong attention from all parties. Relevant authorities and leaders have also taken great care of us.

This time, Mr. Yu (Yu Chengwu) went to Shanghai to discuss the listing matters with the leaders of relevant departments.

As the number one in China, we also need to discuss a series of related matters with the competent authorities, so it will be more troublesome in the early stage. However, the entire project is progressing relatively smoothly. If all goes well, I believe that the day when the listing goes on is not far away. "

Wu Hao nodded and said: "I have always been very concerned about Haoyu Aerospace's listing work, which is related to the future development of Haoyu Aerospace and the implementation of related major projects, so you must hurry up."