Because this would indicate technical level superior to Earth. Greatly superior. The production of antimatter is, for example, process, theoretically known even in XX century, and with dilithium (which is natural element) you could make this process cost-effective rather quickly. But we haven't got even a clue, how to create artifical quantum singularity.
ITRW, yeah. But in Trek, manipulation of gravity is a technology discovered by the Pakleds' less clever relatives from planet Slooooow early on in their quest for space travel. Crunching matter into singularities might be a triviality discovered long before a practical way to manufacture antimatter.
Some of them have machineguns for anti-aircraft defense)
But not cast gunbarrels comparable to the naval cannon that is the main weapon of the battleship. Incidentally, gunbarrels might be a good analogy for warp coils in another way as well: created in a tedious process (it's even called casting in the TNG TM) that may result in duds and can't be hastened, forming a key bottleneck in construction.
What, antimatter? With all respect, the mass of antihydrogen is exactly the same as the mass of hydrogen. And dilithium crystals never were shown as particulary heavy.
Huh? I said the magical mass is in the warp coils. It's not in antimatter or dilithium.
The size of Earth disk at this moment is not that small.
It really is.
http://movies.trekcore.com/gallery/displayimage.php?album=491&pid=52030#top_display_media
That, an ICBM today can't do. Not even something like Saturn V.
Please. Look at the aerospike engine nozzles:
Which could not be adapted for NTR. They won't work in vacuum, and NTRs won't work in atmospheres.
Ok, let's assume that this is dust fission engine, deal?
That, or some sort of an ion engine fired up by a nuke, would certainly work better. But since there's artificial gravity aboard, we might just go the full nine yards and say this is a futuristic engine that does not require propellant (which seems to be missing from the design, and would be hard pressed to play a credible role in interstellar travel which Khan achieves).
For example, it make sence not to haul the propellant from Earth, but to load it in space, from orbital (or Lunar) propellant depot.
Great point. Although to defeat the rocket equation for interstellar travel, Khan would still need a bit of magic. (Which he is supposed to have in ample supply, so no problem there.)
...it could exactly reach 10% of lighspeed. Of course, this means that by 2263 she would be no farther than 20 lightyears from Solar System
One performance criterion we could use is the ship achieving time dilation sufficient for turning the about three centuries of flight time into just two centuries of cryosleep time. About 45% lightspeed would turn 270 years into 250 and thus technically qualify; it also gets Khan about 150 ly away from Earth, a distance indeed studied by Earth in the timeframe indicated (Archer's mission era) and then plausibly abandoned as required.
The extra performance could come from an AG boost to propellant exhaust velocity, or an AG reduction of propellant mass while in storage, or an AG increase of propellant mass while being ejected, or a combination of all three.
(Also, if the derelict was found according to Khan's superclever master plan, he might have had some fuel left for further domination games. If she overshot her target, whatever that was, then probably not. But a model allowing for even greater delta vee than 0.45c, hopefully twice that, might be useful.)
and her trajectory was probably well-known (on the other hands, World War III... Earth obviously have more important things to do than saving the data about trajectory of half-of-century old spaceraft with augments onboard).
There's the "fragmentary records" thing, yeah. Probably nothing like total anarchy, since we know of nothing else being lost either in WWIII or the Eugenics War(s); more like one or two interplanetary spaceships out of the supposed hundreds going unaccounted for back in the 1990s already. Either because of lost tracking data, or because there was too much reshuffling of ship identities in all sorts of scams and tactical feints?
Timo Saloniemi