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Questions about alternative designs the asker has thought of, such as "why was X built this way and not this way"

5 votes

How do you calculate the percentage of light-speed a ship with a certain delta-v can achieve...

In the case where the spacecraft can achieve relativistic speeds and no gravity is involved, $\Delta v$ is actually $c$ times the maximal change of rapidity which can be achieved. So the maximal speed …
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