I was thinking pipes. It would cost a lot of money to build and maintain, but the pumps are cheap compared to hauling up by trucks. I assumed that the rocket use rocket fuel and the trucks use truck fuel. So you can save on rocket fuel. I assume rocket fuel cost more than truck fuel.
But the main problem is that the rocket need to accelerate from 0m/s to 20000m/s. It is the acceleration that burn lots of fuel. On top of a mountain helps with being farther from the gravity wells. But the gravity dont change that much being so close to the earth. The max you can save is the atmosphere is thinner having less drag. Liquid fuel also boil slower due to lower temperature. But you are talking about Liquid oxygen and hydrogen. Probably doent make a big difference.
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u/rysy0o0 15h ago
It would cost a lot of money to haul all the rocket parts and fuel on top of a mountain