Is it possible? If so, what would the ramp length and height need to be?

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[–] 7 points 1 year ago

If you're going fast enough for a ramp to send you into space, you're already going sufficiently fast to have a set of wings to carry you the majority of the altitude you need to achieve. And at that point, you're trying to make a SSTO space plane. But those aren't currently viable with existing technology due to inefficiencies in current rocket designs.

Earth is big, with a very deep gravity well. It's not well suited for fully self powered space planes.

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