Yes, it is intended for FS universe and it's a stealth long range artillery asset. It's mission is to rapidly destroy dreadnoughts' support ships from safe distance, to allow other friendly ships to concentrate fire on their main target.
Actually t's a long story: this design is influenced by so many games/movies that I'm afraid it's becoming a bit confusing.
Let's start from the beginning: initially it was intended as an UEF ship. I was intrigued by those armored plates on Karuna's aft and wanted to build something with them. Than I played Shadow Genesis and appreciated the mighty power of Nightmare's beams, but they were poorly protected. I could sweep away an entire fleet's main firepower with a sigle fighter thanks to extraordinarily effective long range weapons.
Finally I also had a look to BlasterNT's stealth bomber.
I wanted to merge all these features into one ship: stealth design, UEF-like armour, super-heavy long range primary laser, well protected and difficult to target (
the beam's emitter is recessed into the hull, altough still visible from the very front view). I'm currently building it's primary structure, that has a Yamato-battleship feeling indeed...
The general arrow + swept-wing design is inspired to Star Wars' Imperial destryers. I plan to arrange the engines exhoust nozzles like the Executor-class superdestroyer's.
It won't feature all that greebling you can find on SW ships instead: I need the upper deck to remain polish to maintain stealth capability. There will be also some AAA turrets but not too many: I don't want the ship to seem overpowered, since it is already heavily armoured, stealth, fast and has a deadly primary.
As far as the size is concerned I think that, once finished, it will be more or less as big as the UEF Narayana...