Just out of curiosity, what did I say that leads you to believe that I didn't know almost all of today's fighters are supersonic [or at least capable of going supersonic when using afterburners, if not supercruising]?
My intention was in fact to suggest that since almost every fighter today is capable of supersonic speed for at least some of the time they are flying, I would expect most Trek fighters to be able to move at least as fast as the fastest shuttlecraft normally, and much faster during emergencies. This means, maximum safe crusing speed, without undue wear and tear, is maybe warp 3 or 4. However, maximum emergency speed for limited periods should be 9+, safe or not, and requiring replacement of engine parts after mission, following T'Girl's suggestion.
These suggestions have real-world parallels in the behavior of the MiG-25:
The airspeed indicator was redlined at Mach 2.8, with typical intercept speeds near Mach 2.5 in order to extend the service life of the engines.[13] A MiG-25 was tracked flying over Sinai at Mach 3.2 in the early 1970s, but the flight led to the destruction of its engines.[14]
To spell it out:I've heard of supersonic fighters, so I'd expect nothing less than superlumial fighters in Trek. Saying you don't believe in superluminal fighters in Trek sounds about as ill-informed as saying that you've never heard of supersonic fighters in the real world.
On the other hand, I would not be surprised at all if the maximum range of most fighters, the ferry range, were reachable at only warp 1 or 2, since to go faster should use up some resource at an ever greater rate, yielding diminishing returns at faster speeds.
For at least some classes of fighters, maximum combat range, carrying at least some weapons, should be interstellar, even if it requires, say, going warp 1 most of the way, but admitting "supercruising" at warp 6 but for only say one-tenth of the time, and admitting the hitting of "afterburners" to go to warp 9.2 but say for only 30 seconds. Longer high-warp durations should shorten the combat range, making carriers and motherships essential, as you were suggesting, however limited also by the fact that the ultra-high-warp "afterburners" might be usable for only a limited time before risking a warp core breach.
1. "Well, I've heard of supersonic fighters." Thats indicator 1. Heard of. Then you go on to mention afterburners to indicate you're talking about jets. And thats a double-whammy as you'd hard-pressed to find a subsonic jet fighter.
2. The MiG 25 was an interceptor. Its only job was to hit high-speed bombers and land again. Space warfare is much closer to Naval warfare. Size and weight aren't limiting factors as they are in the air. So essentially a MiG 25 would be useless if we had armored and shielded battleships flying around.
3. Your primary error is equating aviation to space combat. Nval combat is a better comparison as aerodynamics, materials, and weight are all totally different factors.
4. To draw on an historical comparison again, would you rather be in a B24 buzzing flak guns or in a P38? One has chosen size and range. Those two factors go hand in hand.
In a Federation context, size is required to have warp capability. Now if you're a one-man craft, do you want to tax the pilot by having him monitor everything alone and be in a vessel unnecessarily large? Keep in mind that warp drive isn't some 'let's go slightly faster than impulse' plot device. Its creating a warp field that forms a bubble and takes you past the speed of light.
5. There are no 'warp afterburners.' Afterburners inject fuel into the exhaust outlets and ignite it there to give additional thrust. Warp drive uses a warp core to generate the plasma, and then its moved into nacelles to the warp coils. Its bulky. And as I've said a thousand times, size is the enemy of a fighter.
6. Now to blend history and Star Trek, the only way we can rationalize the 'fighters' is if they are multiple-occupancy raider/patrol craft/escorts/bombers. A fighter is designed to engage other fighters for (air) superiority. Not engage capital ships. Thats the role of torpedo bombers.