Given the way FS ships handle, I'm going to assume they've got some "inertial-damping"/"acceleration-modifier" (AKA "anti-gravity") stuff going on. Given the way you walk about ships, this may not be too far off. You might even be able to modulate the shields to a degree to reduce air friction about some of those rough edges.
Of course, space-bound only craft are also understandable. For instance, when writing/doing concept art on Cardinal Spear's GTB Gorgon, that is indeed supposed to be a space-only craft (according to my interpretation

). Something like the Ursa would also be a candidate for this treatment... can you imagine a real-world Ursa...

...Of course, that wouldn't hurt the Ursa as it's still perfectly capable of unleashing on a planet with HUGE BOMBZ!!!
