Scale of FT models

Are there any 'official' values for the scale of the various
FT models? Suggested scales I've heard are in the 1:1200 to
1:2400 range, though this seems to make the ships a mite on
the small size (about 240m length for a super dreadnaught).

Is a larger scale assumed, or have I just been influenced
too much by the huge ships of E.E 'Doc' Smith, Star Wars
and Babylon 5?

(yes, I know it doesn't make any difference as far as the
game itself goes, but I like to know these things).

-- 
Be seeing you,
Sam.