Quote:
Originally Posted by unlurking
They will use Raptor for both Starship (7) and Super Heavy (31). They'll optimize for each vehicle, but I've seen comments claiming this is a non-optimized version.
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Correct. At first, they'll use the exact same engine on both. Once the system is up and running, they'll branch them into vacuum-optimized and sea-level-optimized versions. (This same concept is used on the F9, where they're all Merlin 1D engines, but the ones are the second stage are vacuum-optimized - M-Vacs.)