China's Space Program Thread II

antwerpery

Junior Member
Registered Member
LM-8 has its own launchpad at Wenchang, the other projects do not.
That launchpad is another massive massive waste.
they talked about 50 LM8 rockets in May, 2023 not in 2021..
We had official confirmation of the plans in 2023, but do you think that said plans weren't talked and discussed in private much earlier? Factories capable of producing 50 rockets a year are not cheap and talks and plans must have started much earlier than 2023.
A reusable rocket hasn't yet flown to orbit, and it will take whichever company first achieved that many years to scale up to 1/week cadence.
It will be a lot sooner I think, if the private companies get the resources they need. SpaceX has already paved the way after all.
Even besides that, are you arguing that the LM8 facilities shouldn't have been built at all?
Yes. It's not out of the question, just accept that the LM-8 got fucked by the timing and that it will never achieve more than a handful of launches and don't waste billions on new production lines that would be stranded assets in a few years. The CZ-9 basically got a completely new design from the ground up after all, the people in charge of the program were smart enough to know that by the time the original design of the CZ-9 entered service, it would be obsolete in the face of Starship, hence basically throwing years worth of development down the drain and starting from scratch. And the CZ-9 was quite far along in development, the YF-130 was having hot fire tests, components like the fuel tank were already built. All the work being put into the YF-130, completely wasted. But a good thing in the long run, they knew to cut their losses and pivot instead of wasting more money and development time on a lost clause.

The other option would be to do what the CZ-9 did and have a redesign to make the rocket reusable. Push the maiden launch back a few years. At least the CZ-8 would still be able to re-use it's engines, fairing and fuel tanks. The CZ-12 had it's maiden flight as an expandable rocket but it's being redesigned to be reusable, just as an example.
If they put all the eggs in your reusable private launchers basket, they'd be doing nothing in the meantime other than sitting around and waiting for the dream to be realized. Better to simultaneously invest in LM8+reusable.
I want you to use your brain and think. Reusable rockets landing is just a bonus. A very nice bonus, but just a bonus. Even if the reusable rockets do take years to perfect their landing and refurbishment process, they are still perfectly capable of launching payloads as an expandable rockets, the same as the LM8. The F9 spent years acting as an expandable rocket after all, and still manage to take over much of the American launch market without reuse.

Do you do understand the scale of what's coming? There's something like 15 private rocket companies operating right now. 7 of them are planning to launch their first F9 clones this year. The other 8 will likely be launching in 2026 or 2027. Most of the 7 are planning to launch more then once this year, and being F9 clones, most of the new rockets are capable of >15 tons to LEO, far more powerful than the LM-8. They don't have to be reusable at all and the flood of new private rockets will still start putting pressure on the LM-8 launches. And if a handful of those companies do quickly achieve reusability, that will just greatly accelerate things. Even this year, 2025, where LM-8 is finally starting to scale up production, it's still gonna be start getting squeezed out by the private companies even if none of them manage to land their rockets and next year will be a hundred times worse. Again, wasted assets. What's the point having the production capacity of dozens of LM-8 when they are coming online in the same timeframe where the private sector are also ramping up to dozens of launches? And all those private rockets will eventually become reusable, while the LM-8 will forever remain expandable.

Sure, this increase in private launches is due to the sheer amount of companies launching 2-3 times instead of a handful of strong companies launching a dozen times each, but the end result is that unless something goes very wrong, the amount of launches by the private companies's F9 clones will still greatly exceed the amount of LM-8 launches this year and even more next year, even if they all keep failing their landings. And even as expandable rockets, all of them are designed to become eventually reusable, some of them will achieve it on their 2nd or 3rd try, some would take many more, unlike the LM-8 that will never be reusable without a redesign of the rocket. So it's important for the private companies to launch as quickly and often as possible, every launch gives them valuable data and practise.

And here's the other major issues. Launchpads. The LM-8 has an entire launchpad reserved for it in the wenchang commercial launchsite. Meanwhile all 7 private companies that are launching their first F9 clones this year, are all having to fight for the singular commerical launchsite left. Said launchpad can handle 16 launches a year. 7 companies, 16 launches a year. Do you understand the issue? And that's 2025, 2026 will see even more launches by the private sector. Commerical launch pad 3&4 won't be operational until 2027. And again, reusable rockets have to launch often to become reusable, they need data and experince that can only comes from frequent launches.

Can you imagine a strong talented company that has the rockets ready, but the waitlist for the single commercial launchsite means that instead of launching every 2-3 months as they naturally could if they had freely available launchpad access, they have to wait 9 months between launches due to a long waitlist? Can you imagine how much this will slow the entire private sector and reusability? Sure they have inland launch sites, but that's sub-optimal, especially for reusability and there's the hassle of transporting the rockets inland when most of the F9 clones are bigger than the standard 3.35 meter diameter that will allow them to be transported by rail. I will add that the LM-8 does have a 3.35 meter diameter core that allows it to be transported inland by rail, so one wonders why it has an entire valuable coastal launchpad reserved for it.

And again, this could easily have been foreseen. The people in charge could have easily seen even back in 2020 that the ramp up in LM-8 production would be starting in 2024/2025 and that all the private companies would be maturing and starting to launch en masse around the same time and even state owned reusable programs would be starting to take shape too. This is billions of rmb worth of money we're talking about, having those new LM-8 factories active for 2-3 years at best is not worth it, that's a whole of money being wasted. Not to mention the issues of having the LM-8 hogging an entire launchpad for itself.

I would have no issues with the LM-8 if it started scaling up by the dozens of launches in 2021/2022/2023 and taking over the older hypergolic rockets back when all the private companies were still years away from scaling up too, but it literally started scaling up on the same year where the private sector are also planning more than a dozen launches of their (eventually) reusable rockets is peak comedy. If the private companies can pump out dozens of launches, even without reuse, just based on the sheer amount of companies trying to break into the sector, what's the point of scaling up production of the the LM-8? And once the private or state sector does figure out reuse, it's completely over for any expandable rocket currently in service. Once again, the Chinese rocket industry just can't stop fucking up. In an ideal world, all those billions of rmb used for the new LM-8 production lines would have been used for building more coastal launchsites and supporting reusable rocket development.
 
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escobar

Brigadier
Commercial Meteorological Satellites: The Rise of Commercial GNSS Radio Occultation in China
Yunyao satellites are being used for a number of commercial applications. The company developed a global ocean weather navigation system, launched in June 2024. The company’s big break, however, likely came in December 2024, when the China Meteorological Administration (CMA) announced that it would start incorporating 15,000 data points per day from Yunyao Yuhang into their systems.
In addition to 90 small satellites being launched, Yunyao Aerospace has also planned 24 large satellites of the same size as Fengyun meteorological satellites, adding a variety of detection payloads and richer detection data. The first large satellite is expected to be launched at the end of this year.
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Michael90

Junior Member
Registered Member
The LM8 can't even be made reusable without a complete redesign. This is just horrible timing
Do you have a link to prove this? I thought Long march 8 was designed with resnusability in mind from.the beginning ?
If its not the case then that will be a big disappointment. I guess China can only put their hope on peivtar space companies when it comes to reusable rockets then. Since it seems the provate companies are even ahead in this aspect than CASC . I believe Landspace and Ispace will be testing theirs this year
That launchpad is another massive massive waste.

We had official confirmation of the plans in 2023, but do you think that said plans weren't talked and discussed in private much earlier? Factories capable of producing 50 rockets a year are not cheap and talks and plans must have started much earlier than 2023.

It will be a lot sooner I think, if the private companies get the resources they need. SpaceX has already paved the way after all.

Yes. It's not out of the question, just accept that the LM-8 got fucked by the timing and that it will never achieve more than a handful of launches and don't waste billions on new production lines that would be stranded assets in a few years. The CZ-9 basically got a completely new design from the ground up after all, the people in charge of the program were smart enough to know that by the time the original design of the CZ-9 entered service, it would be obsolete in the face of Starship, hence basically throwing years worth of development down the drain and starting from scratch. And the CZ-9 was quite far along in development, the YF-130 was having hot fire tests, components like the fuel tank were already built. All the work being put into the YF-130, completely wasted. But a good thing in the long run, they knew to cut their losses and pivot instead of wasting more money and development time on a lost clause.

The other option would be to do what the CZ-9 did and have a redesign to make the rocket reusable. Push the maiden launch back a few years. At least the CZ-8 would still be able to re-use it's engines, fairing and fuel tanks. The CZ-12 had it's maiden flight as an expandable rocket but it's being redesigned to be reusable, just as an example.

I want you to use your brain and think. Reusable rockets landing is just a bonus. A very nice bonus, but just a bonus. Even if the reusable rockets do take years to perfect their landing and refurbishment process, they are still perfectly capable of launching payloads as an expandable rockets, the same as the LM8. The F9 spent years acting as an expandable rocket after all, and still manage to take over much of the American launch market without reuse.

Do you do understand the scale of what's coming? There's something like 15 private rocket companies operating right now. 7 of them are planning to launch their first F9 clones this year. The other 8 will likely be launching in 2026 or 2027. Most of the 7 are planning to launch more then once this year, and being F9 clones, most of the new rockets are capable of >15 tons to LEO, far more powerful than the LM-8. They don't have to be reusable at all and the flood of new private rockets will still start putting pressure on the LM-8 launches. And if a handful of those companies do quickly achieve reusability, that will just greatly accelerate things. Even this year, 2025, where LM-8 is finally starting to scale up production, it's still gonna be start getting squeezed out by the private companies even if none of them manage to land their rockets and next year will be a hundred times worse. Again, wasted assets. What's the point having the production capacity of dozens of LM-8 when they are coming online in the same timeframe where the private sector are also ramping up to dozens of launches? And all those private rockets will eventually become reusable, while the LM-8 will forever remain expandable.

Sure, this increase in private launches is due to the sheer amount of companies launching 2-3 times instead of a handful of strong companies launching a dozen times each, but the end result is that unless something goes very wrong, the amount of launches by the private companies's F9 clones will still greatly exceed the amount of LM-8 launches this year and even more next year, even if they all keep failing their landings. And even as expandable rockets, all of them are designed to become eventually reusable, some of them will achieve it on their 2nd or 3rd try, some would take many more, unlike the LM-8 that will never be reusable without a redesign of the rocket. So it's important for the private companies to launch as quickly and often as possible, every launch gives them valuable data and practise.

And here's the other major issues. Launchpads. The LM-8 has an entire launchpad reserved for it in the wenchang commercial launchsite. Meanwhile all 7 private companies that are launching their first F9 clones this year, are all having to fight for the singular commerical launchsite left. Said launchpad can handle 16 launches a year. 7 companies, 16 launches a year. Do you understand the issue? And that's 2025, 2026 will see even more launches by the private sector. Commerical launch pad 3&4 won't be operational until 2027. And again, reusable rockets have to launch often to become reusable, they need data and experince that can only comes from frequent launches.

Can you imagine a strong talented company that has the rockets ready, but the waitlist for the single commercial launchsite means that instead of launching every 2-3 months as they naturally could if they had freely available launchpad access, they have to wait 9 months between launches due to a long waitlist? Can you imagine how much this will slow the entire private sector and reusability? Sure they have inland launch sites, but that's sub-optimal, especially for reusability and there's the hassle of transporting the rockets inland when most of the F9 clones are bigger than the standard 3.35 meter diameter that will allow them to be transported by rail. I will add that the LM-8 does have a 3.35 meter diameter core that allows it to be transported inland by rail, so one wonders why it has an entire valuable coastal launchpad reserved for it.

And again, this could easily have been foreseen. The people in charge could have easily seen even back in 2020 that the ramp up in LM-8 production would be starting in 2024/2025 and that all the private companies would be maturing and starting to launch en masse around the same time and even state owned reusable programs would be starting to take shape too. This is billions of rmb worth of money we're talking about, having those new LM-8 factories active for 2-3 years at best is not worth it, that's a whole of money being wasted. Not to mention the issues of having the LM-8 hogging an entire launchpad for itself.

I would have no issues with the LM-8 if it started scaling up by the dozens of launches in 2021/2022/2023 and taking over the older hypergolic rockets back when all the private companies were still years away from scaling up too, but it literally started scaling up on the same year where the private sector are also planning more than a dozen launches of their (eventually) reusable rockets is peak comedy. If the private companies can pump out dozens of launches, even without reuse, just based on the sheer amount of companies trying to break into the sector, what's the point of scaling up production of the the LM-8? And once the private or state sector does figure out reuse, it's completely over for any expandable rocket currently in service. Once again, the Chinese rocket industry just can't stop fucking up. In an ideal world, all those billions of rmb used for the new LM-8 production lines would have been used for building more coastal launchsites and supporting reusable rocket development.
Wait. Is long march 8 not design with reusability in mind? I thought i red years ago that they had the expendable and reusable model? If they finally changed it and only made it expendable then they actually messed up. Since any major new rocket nowadays should have reusability design.
 

oseaidjubzac

Junior Member
Registered Member
1743651483946.png1743651493932.png1743651514523.png1743651522365.png1743651530494.png
On April 3, 2025, at 10:12 AM, the Long March 6 carrier rocket was ignited and launched from the Taiyuan Satellite Launch Center, successfully sending the Tianping-3A 02 satellite into its designated orbit. The launch mission was a complete success.
This launch marked the 14th flight of the Long March 6 carrier rocket and the 568th launch of the Long March series of carrier rockets.
The Long March 6 carrier rocket for this mission is a three-stage cryogenic liquid-fueled rocket developed under the overall responsibility of the Eighth Academy. It adopts the "three-flat" measurement and launch mode, as well as a simplified launch process without a fixed tower structure. The rocket had to withstand temperatures of more than ten degrees below zero without the protection of a launch tower.
The Tianping-3A 02 satellite is primarily used for the calibration of ground-based radar equipment and RCS (Radar Cross Section) measurement. It supports ground-based optical imaging experiments and low-orbit space environment detection and monitoring tests. Additionally, it provides services for atmospheric and space environment measurement and the refinement of orbital prediction models.
 

nativechicken

Junior Member
Registered Member
Hipefully they this new rockets will repalce the old highly toxic hypogolic rockets. Its time.for China to move on from those old rockets espexizlly since they now have better newer ones. Im.surprised the change is happening at such a slow pace if at all. Giving the way China usually fast on large projects. This area has been rather slow even when newer rockets have been tested and operational already. Yet they are still been used rarely in single digits every year. I believe they can do better than this. Something seems to be hindering this change.
China's new generation of clean energy rockets only began launching in 2015. By this year, it's merely been a decade. The United States had already developed clean energy combinations with kerosene and hydrogen-oxygen engines since the 1960s. Toxic fuels (hydrazine-based propellants) in rocket engines didn't begin phasing out until around the Space Shuttle era in the 1980s, with Titan II/IV rockets not fully retired until after 2000. Therefore, generally speaking, ten years is insufficient for a country of China's scale to completely transition rocket propulsion from hydrazine-based fuels to clean energy - this process would likely require about two decades.

Rocket launches involve more than just propulsion systems. The entire launch infrastructure - launch pads, surrounding pipelines, underground pre-buried conduits, and storage tanks - must be considered. Hydrazine-based fuels differ entirely from clean energy systems in their requirements, with completely distinct management protocols. This necessitates restructuring entire teams, knowledge bases, and operational systems. Such infrastructure development and regulatory refinement require over a decade of testing and optimization before large-scale replacements become feasible.

Furthermore, commercial rockets impose different technical requirements, safety management standards, and launch frequency demands. Under China's current launch site management system, a single launch pad is limited to approximately 12 launches annually, whereas commercial operations require weekly or more frequent launches. This necessitates systemic adjustments - essentially establishing dual operational frameworks: one dedicated to commercial activities and another handling non-commercial missions (military, national defense, crewed programs, etc.).

These fundamental factors create the perception that China's decade-long development of clean rockets appears slow. However, this perception is misguided. No rational plan could realistically aim to transition all launches from toxic-fueled rockets to clean energy systems within a single decade. Such rapid comprehensive migration was never the intended objective.
 

nativechicken

Junior Member
Registered Member
Do you have a link to prove this? I thought Long march 8 was designed with resnusability in mind from.the beginning ?
If its not the case then that will be a big disappointment. I guess China can only put their hope on peivtar space companies when it comes to reusable rockets then. Since it seems the provate companies are even ahead in this aspect than CASC . I believe Landspace and Ispace will be testing theirs this year

Wait. Is long march 8 not design with reusability in mind? I thought i red years ago that they had the expendable and reusable model? If they finally changed it and only made it expendable then they actually messed up. Since any major new rocket nowadays should have reusability design.
The CZ-8R and CZ-6X are highly unlikely to materialize, as there is no longer a practical need for them.

First, it’s essential to establish some foundational understanding of rocket engineering. Without this knowledge, it’s impossible to grasp why China—and the global aerospace industry as a whole—has seen limited progress in Vertical Takeoff Vertical Landing (VTVL) technologies over the past decade.

Core Issue: China’s commercial reusable rocket development is now firmly centered on three diameter classes: 3m, 4m, and 5m. The CZ-8, with its 3.35-meter-diameter core stage, occupies an awkward position in this framework. At this scale, reusable configurations yield only 4-6 tons of payload capacity—a commercially unviable range. This lack of economic potential is precisely why the CZ-6X and CZ-8R programs were discontinued.

Falcon 9 Comparison: The Falcon 9’s 3.7-meter-diameter first stage, with its extended propellant tanks, has a total mass (fuel capacity + dry mass) comparable to the CZ-7 core stage (3.35m) plus its four 2.25-meter boosters—far exceeding the CZ-8’s capabilities. The propellant mass and thrust of the first stage fundamentally determine a rocket’s performance.

CZ-8 Limitations: The CZ-8’s strap-on booster configuration results in inferior dry mass efficiency compared to the Falcon 9. Combined with payload penalties from recovery operations, its practical performance inevitably falls short.

Engine Constraints: The viability of the CZ-8R hinged on developing the YF-100 engine with a 5:1 to 10:1 throttling ratio. However, the latest publicly confirmed throttling capability of the YF-100 remains limited to 3:1. Achieving a 100-ton-class engine with 5:1+ throttling is an immense technical challenge—arguably comparable to developing SpaceX’s Starship booster. No operational rocket engine worldwide currently combines >100t thrust with >5:1 throttling; such designs exist only in labs or presentations.

CZ-8R’s Fatal Flaws: Attempting VTVL with the current YF-100 (2:1 throttling) would require retaining excessive fuel for landing mass compensation. This would not only risk landing failures (due to insufficient leg strength) but also drastically degrade payload capacity through worsened mass ratios.

Given these factors, the CZ-8R’s commercial obsolescence became inevitable. Its cancellation reflects rational technical and economic judgment.

Fundamental Redesign Required: For 3.35m-diameter rockets to achieve VTVL, replacing the YF-100 is mandatory. The engine’s excessive minimum thrust (relative to the rocket’s scale) doomed the CZ-8R. China’s aerospace authorities clearly recognize this. Both the CZ-8R and CZ-6X represented early attempts to adapt mature platforms and engines for reusability. While the CZ-8R’s termination was logical, the CZ-6X’s abandonment is more regrettable—its 3.35m airframe fundamentally constrained maximum thrust and payload, even if recovery challenges were resolved.

New Development Roadmap: China’s updated approach for 3-4m VTVL rockets involves abandoning the YF-100 and developing new 65-100t engines tailored to 3.35m stages. Engine development cycles (5+ years) dictate that flight tests will likely emerge between late 2025 and 2030. With over 35 commercial rocket companies now active in China, progress appears assured.

Market Context: Crucially, China’s commercial space sector operates independently from the U.S.-dominated global market. As China’s commercial launch industry emerged several years later, there’s no urgent risk of SpaceX monopolizing its domestic demand. This structural isolation eliminates any need for rushed development timelines.

Conclusion: The perceived "slowness" of China’s clean rocket transition reflects neither technical lag nor mismanagement, but rather the inherent complexity of aerospace system evolution and deliberate strategic pacing within a self-contained market ecosystem.
 

nativechicken

Junior Member
Registered Member
That launchpad is another massive massive waste.

We had official confirmation of the plans in 2023, but do you think that said plans weren't talked and discussed in private much earlier? Factories capable of producing 50 rockets a year are not cheap and talks and plans must have started much earlier than 2023.

It will be a lot sooner I think, if the private companies get the resources they need. SpaceX has already paved the way after all.

Do you do understand the scale of what's coming? There's something like 15 private rocket companies operating right now. 7 of them are planning to launch their first F9 clones this year. The other 8 will likely be launching in 2026 or 2027. Most of the 7 are planning to launch more then once this year, and being F9 clones, most of the new rockets are capable of >15 tons to LEO, far more powerful than the LM-8. They don't have to be reusable at all and the flood of new private rockets will still start putting pressure on the LM-8 launches. And if a handful of those companies do quickly achieve reusability, that will just greatly accelerate things. Even this year, 2025, where LM-8 is finally starting to scale up production, it's still gonna be start getting squeezed out by the private companies even if none of them manage to land their rockets and next year will be a hundred times worse. Again, wasted assets. What's the point having the production capacity of dozens of LM-8 when they are coming online in the same timeframe where the private sector are also ramping up to dozens of launches? And all those private rockets will eventually become reusable, while the LM-8 will forever remain expandable.
I think most of you have misunderstood one thing.
When China's aerospace sector mentions an annual production capacity of 50 LM8 rockets, this refers to the factory scale and production design—it doesn't mean the factory is dedicated to manufacturing only one type of rocket. You should review China's aerospace literature on intelligent rocket manufacturing (there are numerous detailed papers on CNKI). Today’s production relies on flexible pulse production lines, high-level automation, universal tooling equipment, and smart factories across China that integrate semi-automation, full automation, and AI-driven design. Concerns about "wasting LM8 production lines" are entirely unnecessary. The LM8 production infrastructure already overlaps with the CZ7 systems, and future process improvements will enable mixed production of 3-, 4-, 5-meter diameter rocket bodies on a single line.


You can find out by looking for the following two articles. I don't have permission to upload PDF files.

火箭助推器脉动式总装生产线关键技术探讨_国冰
运载火箭数字化柔性移动装配生产线关键技术及应用_余子开

According to the latest information, there are currently 35 commercial rocket companies in China.
 

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antwerpery

Junior Member
Registered Member
Do you have a link to prove this? I thought Long march 8 was designed with resnusability in mind from.the beginning ?
If its not the case then that will be a big disappointment. I guess China can only put their hope on peivtar space companies when it comes to reusable rockets then. Since it seems the provate companies are even ahead in this aspect than CASC . I believe Landspace and Ispace will be testing theirs this year

Wait. Is long march 8 not design with reusability in mind? I thought i red years ago that they had the expendable and reusable model? If they finally changed it and only made it expendable then they actually messed up. Since any major new rocket nowadays should have reusability design.
They had a plan to make the LM8 reusable, but it was a pipe dream. The LM-8 is not designed to be reusable. The original plan was for the LM8 to land with it's boosters attached. Never gonna happen, it's as ridiculous as the Vulcan's plan to drop it's rocket engines from orbit encased in a heat shield for reuse. Just a desperate plan to make an already obsolete rocket seem more attractive in the age of reusable rockets. For reusable rockets, all of them have a few things in common, that is their engine layout. A central engine surrounded by a ring of even numbered engines.

1743678970555.jpeg

This is to balance out the thrust, so as to ensure that the rocket doesn't get unbalanced. Also, reusable rockets use a larger number of weaker engines that can be throttled, instead of the old style of a handful of extremely powerful engines. But the core layout is still the most important factor here.

1743679293221.png

None of China's current LM rocket fleet fit this criteria, even if their engines are designed for reuse and throttling. The LM-8 has a 2 engine layout and optional boosters, the LM-12 has a 4 engine layout. And of course you can't just change the engine layout of a rocket willy nilly, especially not adding new engines in. Making the LM8 reusable is like trying to make a brand new rocket. That's basically what's happening to the LM-12, another waste of money. Despite being the last in development of the LM family, they didn't get the memo that reusable rockets were the new hottest until the original expendable design was already completed. SAST developing a reusable version of the LM12 is like developing a new rocket from scratch and thus developing two different rockets, they would have been better if they done what the CZ-9 team did and pivoted mid-design phase to save money and time, and not finished the expendable design at all.

If the LM-8 is already obsolete, then I wonder how many times the expendable LM-12 will be flying? Probably less than 5 times over it's entire lifetime I bet.
 
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gpt

Junior Member
Registered Member
They had a plan to make the LM8 reusable, but it was a pipe dream. The LM-8 is not designed to be reusable. The original plan was for the LM8 to land with it's boosters attached. Never gonna happen, it's as ridiculous as the Vulcan's plan to drop it's rocket engines from orbit encased in a heat shield for reuse. Just a desperate plan to make an already obsolete rocket seem more attractive in the age of reusable rockets. For reusable rockets, all of them have a few things in common, that is their engine layout. A central engine surrounded by a ring of even numbered engines.

View attachment 149296

This is to balance out the thrust, so as to ensure that the rocket doesn't get unbalanced. Also, reusable rockets use a larger number of weaker engines that can be throttled, instead of the old style of a handful of extremely powerful engines. But the core layout is still the most important factor here.

View attachment 149299

None of China's current LM rocket fleet fit this criteria, even if their engines are designed for reuse and throttling. The LM-8 has a 2 engine layout and optional boosters, the LM-12 has a 4 engine layout. And of course you can't just change the engine layout of a rocket willy nilly, especially not adding new engines in. Making the LM8 reusable is like trying to make a brand new rocket. That's basically what's happening to the LM-12, another waste of money. Despite being the last in development of the LM family, they didn't get the memo that reusable rockets were the new hottest until the original expendable design was already completed. SAST developing a reusable version of the LM12 is like developing a new rocket from scratch and thus developing two different rockets, they would have been better if they done what the CZ-9 team did and pivoted mid-design phase to save money and time, and not finished the expendable design at all.

If the LM-8 is already obsolete, then I wonder how many times the expendable LM-12 will be flying? Probably less than 5 times over it's entire lifetime I bet.


12 is derived from a failed SAST lunar rocket proposal. The 8R and 12 are likely KPI projects within CALT/SAST and not a serious attempt at producing a robust reusable system. If you look at a lot of the key metrics they are all way off-base.
The 'correct' way to do it would've been to:

1) start the development of 7xYF-100K process for the 5m diameter booster
2) start the development of 85-100t engine for 3-4m (5m can also use this, just use 11+ engines)

Then it's just a matter of R&D. It can take a decade to develop a new rocket. So the late start on the above means most of China's reusable rockets will come online in the latter half of this decade.
 
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