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by nordsieck
1267 days ago
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> The innovation here isn't about reusability at all, it's about the economics of reuse. It's about both. SpaceX showed that the 1st stage of a rocket can be reliably reused in production. Which is really important from an architecture perspective because 2/3 stage rockets are just more efficient than 1/1.5 stage rockets (mostly due to the propellant mass fraction term of the rocket equation). To give some examples, the payload mass fraction of some reusable rockets is: * Shuttle(partial reuse): 1% * Falcon 9(partial reuse): 4% * Starship(full reuse, in development): 2% |
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