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8/4/2025, 1:09:21 PM
>>16740514
The Longyun engine by JZYJ can throttle a bit deeper than merlin 1D (30% or so, frankly merlin's ~39% is nothing exceptional in 2025) and more importantly their 1st stage are likely to have worse mass ratio and be heavier...
But yeah I guess if you take the stainless steel Yuanxingzhe by Space Epoch for example, with 9 Longyun and a S1 dry mass that's likely maybe 50% higher than a F9 S1, it'll likely be able to do <1 TWR at landing (their hopper probably already could hover desu, looking at the video - picrel), doubt this will result in a meaningful reliability increase.
I'd probably expect the CZ-12A to be in a similar case (likely lighter but same engine), and maybe the Zhuque-3 (50% throttling but their S1 is likely very heavy), I doubt the 7-engines RLV like CZ-10A or the Pallas 1 could.
The Longyun engine by JZYJ can throttle a bit deeper than merlin 1D (30% or so, frankly merlin's ~39% is nothing exceptional in 2025) and more importantly their 1st stage are likely to have worse mass ratio and be heavier...
But yeah I guess if you take the stainless steel Yuanxingzhe by Space Epoch for example, with 9 Longyun and a S1 dry mass that's likely maybe 50% higher than a F9 S1, it'll likely be able to do <1 TWR at landing (their hopper probably already could hover desu, looking at the video - picrel), doubt this will result in a meaningful reliability increase.
I'd probably expect the CZ-12A to be in a similar case (likely lighter but same engine), and maybe the Zhuque-3 (50% throttling but their S1 is likely very heavy), I doubt the 7-engines RLV like CZ-10A or the Pallas 1 could.
8/4/2025, 1:05:49 PM
The Longyun engine by JZYJ can throttle a bit deeper than merlin 1D (30% or so, frankly merlin's ~39% is nothing exceptional in 2025) and more importantly their 1st stage are likely to have worse mass ratio and be heavier...
But yeah I guess if you take the stainless steel Yuanxingzhe by Space Epoch for example, with 9 Longyun and a S1 dry mass that's likely maybe 50% higher than a F9 S1, it'll likely be able to do <1 TWR at landing (their hopper probably already could hover desu, looking at the video - picrel), doubt this will result in a meaningful reliability increase.
I'd probably expect the CZ-12A to be in a similar case (likely lighter but same engine), and maybe the Zhuque-3 (50% throttling but their S1 is likely very heavy), I doubt the 7-engines RLV like CZ-10A or the Pallas 1 could.
But yeah I guess if you take the stainless steel Yuanxingzhe by Space Epoch for example, with 9 Longyun and a S1 dry mass that's likely maybe 50% higher than a F9 S1, it'll likely be able to do <1 TWR at landing (their hopper probably already could hover desu, looking at the video - picrel), doubt this will result in a meaningful reliability increase.
I'd probably expect the CZ-12A to be in a similar case (likely lighter but same engine), and maybe the Zhuque-3 (50% throttling but their S1 is likely very heavy), I doubt the 7-engines RLV like CZ-10A or the Pallas 1 could.
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