A little underwhelming given the scale I've presented for the Battlestars, but there it is. I wanted to go with the triangular form again since 3 is a sacred number among many religions and perhaps had it's origins 'out there'. I didn't like the new vipers actually- they look more like classic cars with oversized cockpit bubbles over the buisness-y look of the original designs.
Anyway? Vipers, in my take on Galactica.
"Viper" is the name given to the class of fighters that are capable of operating in space, in the air, and traversing between the two. The first vipers were quad-engined and sluggish, but the newest interceptors are actually quite sophisticated. Most pilots call their craft "Vipers", but there are sub-class names for the various types since the beginning of the cylon war ("Starhound" is the current production version). They're also given color designations for reporting purposes (a nod to Richard Hatch's take on things- these Vipers are "Azure" types).
Pretty early on the Colonials realized that they couldn't match the Cylon fighters in terms of firepower and durability, so they went the opposite direction. Colonial Vipers are blindingly fast and incredibly maneuverable. Shields give them an additional edge over the seemingly expendable Cylon raiders. Though the Azure interceptors sacrifice missile armament for speed, other Viper variants exist that retain that capability.