I had a lot of fun messing around with aircraft carrier designs recently, but without an updated part welding mod it's impossible to do so without extreme lag. I know the video is awful, I'm pretty much only uploading it so I can clear out some hdd space. Oh and by the way, this isn't even the biggest carrier I've built.
Recorded in Kerbal Space Program version 1.1.3 with the Stock Visual Enhancements mod.