Well, it was only a matter of time before I was able to get around to this project.
I'm an old-school Trekkie (and I've finally gotten over my problems with that label, so if it offends you...I don't much care), and for years my version of Star Fleet only had half a dozen ship classes. This version of Star Fleet for me is only a minor exception in that I'll be using dozens of ship classes, but the ones I fell in love with from the old Franz Joseph Technical Manual all those years ago will be among them.
A couple of words on these write-ups: Some of them are not, technically speaking, completely rules-legal, since some of the components (notably the sensors) aren't available for at least 75 years after the ships are supposed to be built. Since the 2245 Constitution class had some not-rules-legal stuff and the FJTM ships were built at the same time, I had no problem ignoring the dates on the sensors.
I used the Constitution write-up in the NG as a guide for the rest of the ships. There's not a lot of guidance on some things as regards these ships, so my own personal interpretation of them comes very much into play. If you don't agree with how I did them, feel free to design your own versions. I'll be coming back later to do some refit versions, but for now, just the originals will be posted.
I've done the math on most of these, but it might be a few minutes as I get them all written up and make them pretty.