Eagle class frigate
Taking a page out of EC Henry's book, I've gone and modeled a wildly obscure ship. In this case, a background ship from the original run of Battlestar Galactica. (number 3 here if you're curious https://en.battlestarwikiclone.org/w/images/f/fb/The_Fleet%28TOS%29-PortsideView.jpg).
I imagined this Eagle class as a civilian built patrol frigate. With a small gun armament for defense against fighters and a reasonable missile and Viper complement for rounding up pirates and smugglers. It also carries advance sensors and raptors for search and rescue. This second line and thoroughly boring duty is what kept a single one of the class, the Excalibur, away from the Cylon attack long enough to join up with the Galactica.
Eagle engaging a fleeing pirate ship
Front view
The Eagle sports 4 main sub light engines. Their wide spread means the frigate is surprisingly maneuverable but means that it doesn't take a lot of disabled engines before its limping home on its maneuvering thrusters.
Lower front view
The Eagle is equipped with 15 single mount light and 1 twin mount medium defense canons
The ship's bow is equipped with 8 munition launch tubes
The flight deck is cramped in the extreme. The 12 vipers are usually maintained on their launch rails for lack of room.
Two raptors and a pair of replacement vipers are stored below.
Flight deck external. On the right we can see one of the ship's optical landing system and its bunker. On the left is a remote refueling arm, which is used to refuel CAP aircraft without needing to depressurize the internal section of the flight deck.