I am seeing a lot of varying masses being quoted for the Chinese CZ-5B rocket stage that generates such an interest right now: 17 ton, 20 ton, 22 ton... AFAIK the dry mass is 17 ton. The 20/22 ton I see quoted a lot is, I think, the pre-launch mass when loaded with fuel.
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Antwort an @Marco_Langbroek
The mission booklet for LM-5/SJ-20 gives the LM-5 1st stage at propellant load at 165.3 t & total liftoff mass at 186.9 t = 21.6 t dry mass. The LM-5B/Tianhe mission booklet unfortunately only gives a propellant load of 166.66 t but no individual stages dry/liftoff mass.
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Antwort an @Cosmic_Penguin
Shouldn't you also substract the payload mass and side boosters from that total lift-off mass?
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Antwort an @Marco_Langbroek
The "total liftoff mass" was for the 1st stage only (156.6 t for each booster, 36.0 t for 2nd stage, 2.4 t for fairing, 8.0 t for payload). Total liftoff mass for LM-5/SJ-20 was 859.8 t & for LM-5B/Tianhe was 849 t.
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Sources (originally from Chinese websites): https://forum.nasaspaceflight.com/index.php?topic=44114.msg2030342#msg2030342 … https://forum.nasaspaceflight.com/index.php?topic=26876.msg2232171#msg2232171 …
Das Laden scheint etwas zu dauern.
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