View attachment 38174 = 8 Chars
that would be halfway believable if they didn't turn constantly..Since the only other thing that has these fans apart from ships is stations (check docking hangars) I would assume it's to allow atmospheric cooling or even taking on oxygen when landed and venting that stale space air thats being recycled around your ship for weeks.
Obviously they are the external inertial dampers. witch space travel would not be possible without them.![]()