Thanks guys! I didn't realize until re-reading this that most of my ships are variants, with only the Melbourne a true refit. I may need to think about that some more, although I think the timing of the Melbourne was what kept the Excelsior class from "only" having a 70 year run.
I'm still a little torn about how clear I want to be about Ingram. I have a soft spot for that old fanon design, but I don't want to delve too deep into whether Starfleet had battleships in the 23rd century or not. (Giving the Federation class a shout-out or two is okay though.
)
I must say I was (and still am) a bit torn about whether to include the kitbash "cousins" from DS9 at all or not. The Centaur type gave me numerous issues - whether it was "truly" an Excelsior cousin or should be scaled differently due to the conflicting design elements on it, for one. I also don't like the idea that it's a Centaur class ship. I picked Mediterranean because which of those we knew to exist from the Encyclopedia and MA seemed to fit.
Totally agree on Medusa... although I didn't realize it didn't actually appear on screen. I think someone - maybe Reverend? - had previously come up with the notion that the weird back was partly to support a train of cargo units, like those from FJ's Ptolemy class. I am going to revise my text accordingly. I am also unsure whether I want to call it Medusa or Trident class... I've seen both. Perhaps I'll change Trident to be the official name and Medusa to be one of the ships.
You make some good points here.. and I've actually never thought about Enterprise-C saucer separation being so pointless. Actually, something I've been thinking about with regard to warp core placement is what role exactly saucer separation plays over the course of Trek history.
I feel fairly certain that we "know" that in TOS it was a desperation maneuver, per Kirk's lines in "The Apple" and even the unused storyboards from TMP. The saucer essentially "abandoning" the engineering section to escape critical damage seems likely. But, by the time of TNG we see something that is apparently a design feature on at least the Galaxy class that both ships should be fairly autonomous - and I think Riker's lines in "Farpoint" suggest he has done it before (perhaps on the Hood?) One could debate whether the Galaxy saucer was all that valuable without warp drive... or for that matter whether it may've actually had warp drive.
I have had the TNG Movies Sketchbook for some time and the justification for the extra impulse engines always felt... I dunno, weird to me, and this is part of why I fished around for the prototype driver coil explanation. Perhaps I should re-evaluate this original explanation, though. In my existing notion of the Enterprise-B as a "deep space variant" perhaps this makes more sense than I've realized. Generally I don't think that the two halves of the Excelsior were meant to be autonomous vessels, and perhaps saucer separation was meant to still be a last-ditch maneuver... but maybe it was also easier for this class ship to re-couple the two main sections after such a maneuver. Therefore, it could be something that Riker had practiced on the Hood and help explain the extra impulse engines.
Something else I also didn't make clear was how I envision impulse engines working. I think there have been primitive driver coils since the NX-01, but that around the time of the TMP refit the deflection crystal starting playing a role in this. I'm not entirely sure how yet, but I imagine that it's related to the crystals modulating the field generated by the coils and is somehow related to the ability to channel warp power into the impulse engines... an ability that seems to disappear by the TNG era along with the deflection crystal. It's my thought that by this time the "modern" driver coils pioneered by the Excelsior variant are in place, and later Excelsior refits grant these to all members of the class, though they retain the deflection crystal perhaps due to inefficiencies of the smaller engine design.
There must, after all, be reasons the entire class wasn't built to Enteprise-B spec, no matter what else I say about it.
I'm still a little torn about how clear I want to be about Ingram. I have a soft spot for that old fanon design, but I don't want to delve too deep into whether Starfleet had battleships in the 23rd century or not. (Giving the Federation class a shout-out or two is okay though.

I must say I was (and still am) a bit torn about whether to include the kitbash "cousins" from DS9 at all or not. The Centaur type gave me numerous issues - whether it was "truly" an Excelsior cousin or should be scaled differently due to the conflicting design elements on it, for one. I also don't like the idea that it's a Centaur class ship. I picked Mediterranean because which of those we knew to exist from the Encyclopedia and MA seemed to fit.
I always liked the Shelley aside from the outsized Miranda nacelles, but the Medusa is one ugly-ass piece of junk.Thankfully it never actually appeared on screen.
Totally agree on Medusa... although I didn't realize it didn't actually appear on screen. I think someone - maybe Reverend? - had previously come up with the notion that the weird back was partly to support a train of cargo units, like those from FJ's Ptolemy class. I am going to revise my text accordingly. I am also unsure whether I want to call it Medusa or Trident class... I've seen both. Perhaps I'll change Trident to be the official name and Medusa to be one of the ships.
I wasn't aware of this before. Would a "battle bridge" in the TNG vein make much sense on a ship that only has impulse engines on the saucer?
Come to think of it, this was the problem with the Sovereign separation which was in Eaves' concepts.
It's kind of the opposite problem to the Ambassador, whose lack of saucer impulse engines makes it a pretty useless lifeboat! No wonder the Enterprise-C was lost with all hands (except Yar).
OTOH maybe it's just the E-B equivalent of auxiliary control, or a CIC kind of thing.
You make some good points here.. and I've actually never thought about Enterprise-C saucer separation being so pointless. Actually, something I've been thinking about with regard to warp core placement is what role exactly saucer separation plays over the course of Trek history.
I feel fairly certain that we "know" that in TOS it was a desperation maneuver, per Kirk's lines in "The Apple" and even the unused storyboards from TMP. The saucer essentially "abandoning" the engineering section to escape critical damage seems likely. But, by the time of TNG we see something that is apparently a design feature on at least the Galaxy class that both ships should be fairly autonomous - and I think Riker's lines in "Farpoint" suggest he has done it before (perhaps on the Hood?) One could debate whether the Galaxy saucer was all that valuable without warp drive... or for that matter whether it may've actually had warp drive.

I have had the TNG Movies Sketchbook for some time and the justification for the extra impulse engines always felt... I dunno, weird to me, and this is part of why I fished around for the prototype driver coil explanation. Perhaps I should re-evaluate this original explanation, though. In my existing notion of the Enterprise-B as a "deep space variant" perhaps this makes more sense than I've realized. Generally I don't think that the two halves of the Excelsior were meant to be autonomous vessels, and perhaps saucer separation was meant to still be a last-ditch maneuver... but maybe it was also easier for this class ship to re-couple the two main sections after such a maneuver. Therefore, it could be something that Riker had practiced on the Hood and help explain the extra impulse engines.
Something else I also didn't make clear was how I envision impulse engines working. I think there have been primitive driver coils since the NX-01, but that around the time of the TMP refit the deflection crystal starting playing a role in this. I'm not entirely sure how yet, but I imagine that it's related to the crystals modulating the field generated by the coils and is somehow related to the ability to channel warp power into the impulse engines... an ability that seems to disappear by the TNG era along with the deflection crystal. It's my thought that by this time the "modern" driver coils pioneered by the Excelsior variant are in place, and later Excelsior refits grant these to all members of the class, though they retain the deflection crystal perhaps due to inefficiencies of the smaller engine design.
There must, after all, be reasons the entire class wasn't built to Enteprise-B spec, no matter what else I say about it.