Cook
Banned
There is the alternative to building a Mass Driver up front; build a sled track and use a rocket sled as a first stage to boost rockets. Getting a rocket from 0 kms to Mach 1 takes something close to half the fuel consumed in a launch. If instead that’s delivered by a rocket sled, (replaced by a maglev sled when the technology catches up) you have a distinct advantage. And the track is only about 15km long.