Is this your guitar?
...If it is, like Creta said that tunes just like a normal guitar.

anyways man, I dont wanna sound rude or anything, but I think you're thinking about guitar a bit too technically. there really isnt many specific equations/hypothesis, its not really a science. Its all about how the instrument feels to you. If you like thick strings, you put on thick strings, and viceversa with thin strings. theres tons of different tunings and ways to play the instrument- there really isnt an end to the possibilities with a guitar.

so what I'm really saying, is take the guitar for what it is- a personal instrument to be played to your preferences, not an equation; you know what I'm saying?