The Yorktown was a cool ship based from the game StarTrek: Legacy in the Enterprise Era of the early Federation. This ship is bigger than the NX class starships like the Enterprise, Columbia and Avenger. But with nearly the design of the Constitution class warp nacelles this ship is a bad ass looking version.
This is the screenshot taken while selecting a ship, the Yorktown Class looks big of it's size but she's very slow moving but can able to fire 2 phasers at once.
This is my version of the Yorktown Class done on Photoshop. The saucer section is larger than the original saucer from the Consitution class starship with the same sized bridge.