...but we're not trying to simulate starships in a wind tunnel and measuring the density of electron-bonded duranium...
NeghVar --
If you are interested in the above, the 4th Ed. Traveller sourcebook Fire, Fusion and Steel provides you with some serious math-intensive design rules. While it doesn't give you Trek ships, it does give you an excellent idea on what it takes to put a ship together.
Davy Jones
"Frightened? My dear, you are looking at a man who has laughed in the face of death, sneered at doom, and chuckled at catastrophe! I was petrified."
-- The Wizard of Oz