* They use fusion furnaces that burn hydrocarbons, ion engines for thrust, and antigravity drives for maneuvering close to planets.
They don't say what kind of fuel they use, do they?
What if it's some exotic and yet explosive shmuk?
* Thermonuclear weapons are used in naval combat.
Practically, yes, but we don't know how focused they are.
* How fast they accelerate.
Rather how fast they manoeuver. Their acceleration abilities seem to greatly differ depending on who makes the analysis, or if you watch the combat scenes or actually give weight to the schematic in the imeprial bunker at Endor, and above all, this is all relative to the DSII's size.
Then you can also give ROTS's opening scene a chance, and how that empty sky suddenly fill up with gazillons ships, supporting the idea the Venator Obi-Wan and Anakin flew by was orbiting the planet pretty fast.
Besides, we can get the Gs, but we don't know the material properties, ergo we don't know the real average mass of the ships.
* Approximately how big they are.
Yeah, at least that's god enough to know how you need to manoeuver around them, and how many people they may carry.
But we know virtually nothing about the crew numbers.
* What the hyper limit is.
There seems, again, to be much disagreement about that.
* From acceleration figures and the use of ion engines, as well as the hyper limit, ballpark peak power-generation-per-unit-mass figures.
There's still plenty of room for exotic materials, and acceleration figures are all but fixed.
Which seem to be quite impressive, in seeing how intermitent engines can make an ISD rotate so fast after being hit by ion bolts.
* The firepower available to patrol ships, and the firepower used by lighter quick-firing Star Destroyer weapons.
A couple of megatons, eventually, based on dubious old asteroid destruction VFX.
Yet a very extreme low end figure for such civilisations which have mastered fusion at packed it down to very small levels, literally down to the equivalent of personnal flying cars and domestic reactors for small houses.
* Overall typical rates of fire.
Actually, we just got one blurry instance in some murky background in ROTJ. Hold me back.
In comparison, you have the main bigass cannons of those CIS ships in ROTS firing several shorts bursts within a second.
Plus those prequel continuous beams and a theory I fancy about how you can accelerate bolts if you spend the right amount of energy for that, and those typical rates of fire aren't even empirically evidenced, since I don't consider one instance as enough.
You have the Venators at Coruscant firing at decent rates.
I've spotted a Venator firing its four main
12 shots within 3 seconds. That's 4 shots per second. Thus one shot per second per heaviest turret, even sometimes faster than that, like two volleys from the same turret within a fraction of a second. Not bad.
But that's for the Venators. So what do we do from there? Assume that the ISDs are crappier or the same, or better? SFJ's page about TLs gives a rate of fire between 5 and 10 seconds.
Technically, it's correct, since based on one single event. But that's all we get. However, does it make sense in regards of the prequels? Not much. Basically, it's left wide open to anyone.
I don't call that a definitive answer at all.
* Effects of impact vs ships.
Yes, based on VFX were the guy in charge simply removed a whole part of the ship after he considered that most of the asteroid explosion occupied enough room on screen, which leads to some funky material disappearance with some visual nonsense, where there's either a glaring lack of debris from the ship's part that's been obliterated, or from the super massive cloud of utterly vaporized that could only explain why matter disappears so conveniently.
* Some about effective ranges of engagement.
Wraith of Khan like ranges, or some more generous ones, as the one seen in TMP when the nubian ship was escaping the planet. Or the best one, with a heavy heavy ion cannon firing at ISDs located at a fair distance from the planet.
We can grant SW a large orbital firing capacity, but nothing is practically fixed there either.
What about eventual missiles silos, their numbers, quantity of ammo, time to reload, range of various weapons, exact shields power, hull toughness and composition, sensor range, the way they really work, number of squadrons carried, firing arc of most TL cannons in fact, etc.
How many soldiers do ISD carry? How many of them can they deploy on planets?