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inspired by this question: How much propellant is used up until liftoff? which asks how much propellant (fuel/oxidizer) a typical rocket uses before liftoff. What has been or is the most non-typical rocket that uses a large percentage of propellant before liftoff? For clarity I am looking for the largest delta in rocket mass between finishing fueling and liftoff

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  • $\begingroup$ The clear answer is a RUD mission. Great advances have been made in the propellant use before liftoff on this front. $\endgroup$ – Cort Ammon Mar 28 at 18:54

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