That was actually the best idea because a long enough length and curve means you can use less acceleration each second. One problem is that to keep it low, like say 3Gs, both the length and curve are huge. Like hundreds of miles. Second is the exit - how high would you have to built it to not open the vacuum tube (it has to be a vacuum to work, i.e. the issues that Hyperloop ran into) and be slamming the projectile with a deceleration effect into the thin air that’s left? The numbers have been crunched before, mass drivers on Earth can’t deliver breakable things.
Also, that curve would be additional Gs and a lot of technical problems to maintain its path.
That was actually the best idea because a long enough length and curve means you can use less acceleration each second. One problem is that to keep it low, like say 3Gs, both the length and curve are huge. Like hundreds of miles. Second is the exit - how high would you have to built it to not open the vacuum tube (it has to be a vacuum to work, i.e. the issues that Hyperloop ran into) and be slamming the projectile with a deceleration effect into the thin air that’s left? The numbers have been crunched before, mass drivers on Earth can’t deliver breakable things.
Also, that curve would be additional Gs and a lot of technical problems to maintain its path.