Can someone shed any light then on why Voyagers nacelles needed to be motorised? I understand the concept of when they are up they create a stronger more efficient warp field but that begs the question of why not just have the damn nacelles in the upright position permanently?? What difference did the nacelles being in the down position actually make to sub light speeds? Even when the position of the nacelles were moved the distance between the down and up positions was minuscule. Any worthy explanations out there?