Casey Handmer
@CJHandmer · Jul 3, 2025
Today my six year old said "If the RL-10 has higher specific impulse than the Raptor why doesn't SpaceX use it for Starship?"
Then we discussed fuel density and the square cube effect and the cost of tanks.
Fathers, don't let your sons Isp-max naïvely.
Elon Musk
@elonmusk
❤️🚀
01:23 PM · July 4, 2025 · 45.7K views
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