Musk on SpaceX: The 4% Margin for Multi-Planetary Life
r0ck3t23 · x · 2026-08-20
Elon Musk admitted that making rockets fully and rapidly reusable is 'preposterously difficult,' requiring the payload to be just 4% of launch mass. This demands A-plus performance across all components—engines, structure, and thermal protection—with zero margin for error. He believes success would reduce orbital access costs by over 100x, deciding 'when' rather than 'if' for humanity's multi-planetary future. The article contextualizes his doubt against past successes like landing boosters and catching them with mechanical arms.
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