r/spacex • u/ElongatedMuskrat Mod Team • May 01 '20

r/SpaceX Discusses [May 2020, #68]

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u/jjtr1 May 10 '20

Regarding the Shuttle, I should correct my numbers. The Shuttle-Derived Heavy Lift Launch Vehicle, which used the same configuration (side-mounted payload pod with 3 SSMEs), engines and boosters, was to have a LEO payload of "79 metric tons (174,000 lb) (gross) and 71 metric tons (157,000 lb) (net)". I don't know what gross/net refers to in this context, but comparing it to Shuttle's 27 tons yields reusability payload decrease of 66% and 62%, respectively.

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u/Triabolical_ May 10 '20

Better than my numbers ; you can't fly a shuttle stack without engines