Summary of Key Points
On July 10th, the Long March 10B carrier rocket was successfully launched from the Hainan Commercial Space Launch Site. This launch marked the first time that a first-stage component of a Chinese carrier rocket was recovered controllably, and it also verified a globally innovative “marine net recovery” technology. The rocket was designed specifically for commercial space missions, utilizing reliable components shared with manned rockets. The net recovery system is more flexible and cost-effective than traditional landing legs. This breakthrough not only reduces the cost of rocket launches but also promotes the development of the commercial space industry towards mass production and regular launches, similar to airline services. It will also encourage private aerospace companies to accelerate their technological advancements.
Detailed Explanation
1. Globally Innovative “Marine Net Recovery”: How Does the Rocket Get Caught?
You can think of the first-stage component of the rocket as a large metal block that falls back to Earth after separation. The international standard for recovery is to use landing legs to make a hard landing on land or a platform at sea. However, in this case, we used a “net recovery” system: a recovery ship deployed a huge, flexible net to catch the rocket as it flew through space. Compared to landing legs, this method has two advantages: first, it eliminates the need for heavy landing legs on the rocket (saving weight and allowing for more satellites to be carried); second, it requires less precision in determining the landing location (the net capture is sufficient as long as the rocket stays within its range). Additionally, the recovery can take place directly below the rocket’s flight path, saving fuel and increasing the payload capacity.
2. Long March 10B: A Rocket Tailored for Commercial Space
This rocket was designed with commercial customers in mind:
- Reliability and Cost-effectiveness: It shares its first-stage component with the manned Long March 10A, inheriting the safety redundancies of the manned version (such as additional backup systems), ensuring high reliability while reducing costs through shared production lines.
- Strong Payload Capacity: The second stage is equipped with a 140-ton liquid oxygen-methane engine and a large 5.2-meter fairing, enabling it to carry larger satellites. It can deliver at least 16 tons of payload to low Earth orbit, which is ideal for satellite constellations like Starlink.
- Efficiency: The rocket uses a “three-level flat launch” approach—testing, assembly, and transportation are all performed in a horizontal position, eliminating the need for vertical setup, thus speeding up the launch preparation process.
3. Recyclability: The Key to Reducing Costs in Commercial Space
The cost of rocket launches is significantly influenced by the first-stage component (which was previously discarded after each use). With this new technology, the first stage can be recovered and reused multiple times, spreading the initial investment over several launches. For example, if a launch used to cost 100 million yuan, it could now cost around 30 million yuan after three recycles. Xie Hongjun, the owner of a private aerospace company, stated that this technology directly reduces launch costs and promotes mass production and regular launches, turning commercial space services from occasional events into a routine offering.
4. A National Success That Sets an Example for Private Companies
Private aerospace companies were still exploring recyclable technologies when the state-owned Long March series achieved this breakthrough for the first time, demonstrating a viable technical path for the entire industry. Xie Hongjun believes that private companies will follow suit and accelerate their technological improvements, such as adopting the net recovery system to optimize their rocket designs. This will raise the overall level of expertise in the industry, leading to more competitive services at lower costs for customers.
5. Future Directions: Greater Payload Capacity and Reusability
Wang Long, an aerospace entrepreneur, predicts that as demand grows (e.g., for large satellite constellations), future versions of the Long March 10B will focus on improving two main aspects: payload capacity and reusability. The goal is to reduce the time required between recoveries and launches (perhaps from half a month to just one week), meeting the needs of frequent launches.
In summary, the successful recovery of the Long March 10B marks an important milestone in China’s commercial space program, transitioning from one-time uses to reusable rockets. This advancement not only reduces launch costs but also makes space services more accessible and similar to regular logistics services.