Several years back, a fan site known as Star Trek Unnamed designed a number of starship schematics from the Federation, Klingon Empire and Romulan Star Empire. Displayed on the Star Trek Unnamed site for a number of years, as well as other fan sites, these schematics are amoung the most detailed ever created for some of these ships.
The original site still exists today, though many sections are no longer functioning. You can view that site by clicking HERE. There's also a step-by-step tutorial on how these schematics were created. Click HERE to see the tutorial.
Though available on many other sites, there's no question that these Starship schematics deserve a place on this site's collection of Star Trek Blueprints and Schematics. Enjoy.