So given this thing goes Mach 20, how fast does it get there? If the intention is to have a platform that can deliver 'stuff' (whether munitions, supplies or p

So given this thing goes Mach 20, how fast does it get there? If the intention is to have a platform that can deliver 'stuff' (whether munitions, supplies or people) is there going to be a problem with g-loading on acceleration and deceleration?