If one, why not two :)
The rising star class (of course not to size if you take the excalibur as a measurement)
In original sizes it would be 10% of the size of the acalibur, here it is maybe one thrid or so.
Very agile for a ships its size and in this configuration more for support duty than active combat (although as all titans still uber :P)

Made with the game "BattleShips Forever!"
http://www.wyrdysm.com/games.php

The original rising star can be found here: http://www.furaffinity.net/view/806395/

As with the excalibur i can give you the file for the ship to play with :)

Comments as always appreciated ^^