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May 11, 2023 at 7:57 comment added jwenting Worse, the added mass of the recovery related systems would have meant smaller payload and/or lower orbital altitude, thus changing the mission profile to where probably a single launch solution to the moon would not have been possible. Which is why some F9 and FH missions don't recover, and have the recovery hardware removed.
May 10, 2023 at 23:56 comment added Mark @RussellBorogove, it would be more interesting to know if the actual formulation of RP-1 has changed. RP-1 doesn't call for a specific combination of ingredients; rather, it places limits on what's allowed to be present.
May 10, 2023 at 18:58 comment added Erin Anne I don't disbelieve most of this answer, but it'd be better with references
May 10, 2023 at 17:52 comment added Russell Borogove Has the specification of RP-1 changed since 1967?
May 10, 2023 at 13:47 history answered caInstrument CC BY-SA 4.0