The model for power generation in Federation starships is now set. Central, internal M/ARC feeding energy to the warp nacelles to produce the warp field. FJ's designs are problematic at best under this concept.
Besides, scouts and destroyers are supposed to be small, fast, lightly armed, highly maneuverable ships. Again, FJ's designs, with a full size saucer and only one warp nacelle, doesn't quite fit.
Right. And the "model for power generation" in earthbound naval vessels is "now set" as well... and there has never been any different form of "power generation" in any naval vessel, has there.
For that matter, "the model for airborne propulsion" is "set" and there has never been more than one system used in that world, has there?
You can say, til you turn blue, that "everyone else is wrong because CRA has ordained the one true order," but that's not going to win anyone over. You can say "I believe that everything works this way" and that's not nearly as obnoxious as it is when you say "I'm right, and everyone else is wrong, and you're all stupid for not agreeing with me."
And we all know that you, personally, really, REALLY dislike FJ's work. You've never been shy about that. And that's fine, because it's your opinion, but you're not going to convince anyone who likes it to stop liking it, simply because you, personally, are "the authority" on the topic.
You can repeat, over and over, that "there is one matter/antimatter reactor, in the main hull," but there is no evidence to support your conclusion on this topic in TOS times except that it's YOUR CONCLUSION and that we're all obviously morons for not seeing things as you, personally, do.
The original design intent was that the power was generated in the nacelles during TOS. The majority of on-screen dialog and plot demonstrated that this was the case. ONE EPISODE has lines supporting your personal perspective on the matter.
Yet you keep "authoritatively stating" that it's a "closed topic."
I ABSOLUTELY AND TOTALLY DISAGREE WITH YOU ON THIS TOPIC. And so do many, many other people. It's not a "closed topic" and you can't make it so by repeating it until you beat us all into submission to your will.
And, let's be blunt, the FJ stuff works, and works perfectly well, as long as you accept that power generation occurs in the nacelles rather than in the main hull. And FJ's work is in agreement with Matt Jefferies' reason for putting the engines out in external housings rather than right inside the hull.
It also makes a certain degree of sense, if you treat this era of Federation shipbuilding to be one of tremendous expansion, that they'd try to use common shipbuilding elements... common framing shapes, common installed hardware, common servicing systems at bases, etc. Modularity is actually a lot more reasonable than "everything custom" is, especially during periods when resources are limited and demand is high.
What's INSIDE one of those hulls... scout, destroyer, tug, cruiser... is likely tremendously different.
Why multiple engines on a cruiser and not on a scout or destroyer? Well, maybe you can actually travel just as fast (even faster, when considering the vastly reduced overall mass) with a single nacelle, but you have less maneuverability. If a ship is intended to be a "straight line sprinter," a single self-powered engine" (along the aerospace model which Matt Jefferies intended), and if cost (in terms of actual currency, or merely in terms of raw materials and time expenditure) is an issue, it makes perfect sense.
Your main objection to FJ's stuff is that you've, ON A PURELY PERSONAL BASIS, "retconned" all of TOS to be in the EXACT SAME MODEL AS TNG IS.
But there's no reason for us to believe that TOS, TMP, and TNG follow even remotely similar models.
That's like saying that a paddlewheel riverboat must operate on the exact same principle as the nuclear-powered aircraft carrier does. After all, "they're both in the same universe" and "built by the same organization" (the US navy) so they MUST be based upon the exact same implementation of the exact same technology, right?
Why do you have a problem even accepting that, MAYBE, the TOS ship and the TMP ship didn't use the same technology, and that the TMP ship and the TNG ship did not use the same technology?
Hey, look... airships... hmmm... some of them are filled with lighter-than-air gas and float. Some use rotating blade lift systems. Some use fixed airfoil wings.
By this argument, we need to "retcon" all of those to all use one common system, don't we???
It's just silly. It really, really is.