There is no acceleration and no hypersonic velocity in Tic-Tac Tech/T^3. Tic-Tac stands still relative to its local gravity field in weightless free float. It’s the space around it that is warping, so that it appears like instant acceleration and hypersonic velocity to outside observers like Commander Fravor using electromagnetic wave signals coming from the warp field. It is in John Archibald Wheeler’s terms: acceleration without acceleration; hypersonic velocity without hypersonic velocity.