The Constitution Class Heavy Cruiser (Classic) from Star Trek: The Original Series and Animated Series - here the USS Enterprise NCC-1701.
Not all my own work, the cutaway is a conversion of the Constitution Class (Classic) cutaway by , as seen in Ex Astris Scientia - and freely available on Google Images.
UPDATE: Revised background, use Download to view full size.
Credits: Original Artwork: (modified by myself). Background: Heavily modified by myself from the SFC3 "Vessel Library" background.
Disclaimer: Star Trek is a registered trademark of Paramount Pictures - no copyright infringement is intended.
Yes, on the original blueprints the torpedo launchers were above the saucer - however it was decided by Paramount/CBS to move them to where we saw them fired in the TV series.
I thought the torpedoes were fired from above the saucer in the show? Bleh I will have to watch through the three seasons to look for that, and it's remastered version >.<