[VladRussian2]

In my view the first version of the Loop (which seems to be something like electromagnetically driven 3-4 winged needle (something like StarWars X-wing starfighter without engines) in a pipe - you need to go supersonic to outrun your sound (for comfort), this is your Concord, and shock wave from the needle will be hitting the wall right in front of where the "wing" ends would be touching the wall, so one can have correctly designed wingtips doing "shock-waveriding" near the wall, instead of touching it, this is your "airhockey") is for ground transport while it will allow to develop/refine/test the next version of the Loop which will be used as the first stage accelerator for space launches