But would you still love the USS Archer if it was a smaller ship, about ~25 meters in length, similar to the Danube class RunAbout?
It wouldn't be as cool, but I'd still like it. Luckily there is no real evidence that its that small, there are many reasons why a bigger ship could be ran by a crew of three. This is Modern Trek, where the old USS Enterprise has dozens of R2-D2 like repair droids shoved somewhere that it never uses after Kirk takes command (and apparently don't make it to the Enterprise-A, they would have been very helpful in Star Trek II), so the general tech level has to accepted in the context of the show, and not how it actually should be if this was Prime Universe pre-Star Trek Discovery.
There is no reason a ship the size of the original Saladin/Hermes, about 242 meters in the old tech book, couldn't have a crew of three in certain circumstances, like acting as a transport for a few officers. Its not like STIII where Scotty basically hotwired the Enterprise and automated it quickly and in secret, and then the ship got into a battle they didn't expect. The Archer was presumably set up for at least the possibility of a small crew, I'd guess in universe they used a ship bigger than a shuttle for range reasons, and the time period probably didn't have exact runabout analogues. Or maybe the Archer is an older ship repurposed for transport, or it is a ship that happened to be available for some reason but without a crew so it was given to Number One for what was presumably supposed to be a quick, peaceful mission.
That is all even with tech that should fit the time period, with how Discovery changed 23rd century tech I wouldn't be surprised if automation could do things that wouldn't even make sense in the TNG and later era, because most of the tech in the modern Trek era is much more advanced then tech in TNG/DS9/VOY, even in the shows set 100 years+ before TNG. Lower Decks is the only show that even tries to make tech that would generally fit in late TNT-VOY era, and it takes place after those shows/movies.
That said, I do believe the Archer could be smaller then 242 meters just based on the design that we see, but without exact stats I'd assume the nacelle is the size of the Enterprise's and the ship scales to it. That said I'd also believe its the size of the old Hermes/Saladin or bigger but the model just doesn't look it for some reason, its not like star Trek hasn't had size issues for ships in the past.
We probably won't get any type of answer until Eaglemoss releases the ship model, and even then half the people here will argue that nothing is canon unless the people running the show state a number on screen somewhere
