[AgentZero]

For 'anti-gravity', correct me if I'm wrong, but does an object's gravitational pull also depend on it the speed of it's rotation? ie: If the Earth had the same mass but spun faster, we'd have higher gravity?
Unless I'm totally wrong about that, then gravity could be created on a ship by placing sphere's of same undetermined high-density material underneath the floorplates and spinning it really fast. Of course that would really only work for the top deck of the ship, since the deck under it would have 1g pulling up and 1g pulling down, ergo zero G. This could be countered by having the spheres on Deck 2 spinning fast enough to create 2g and thus 1g pulling up and 2g pulling down works out at 1g downwards. Not sure whether that would be noticable to people or not, but either way it'd get really tricky the more decks you had since you'd have to account for the gravitational pull of more and more decks above you, and also said pull would be a bit variable since as you got further away from a given deck it's pull would begin wane, and lets not even talk about the decks below you pulling down.

Of course, take a tip from a fellow writer and don't bother explaining anything at all. Think about all the things that would have been considered science fiction 2000 years ago (assuming they had scifi, that is): Cars, Planes, Guns, Computers, Phones, Movies, CDs, DVDs, etc. Now, pretend you have a basic understanding of English but have never heard of any of the above. Is there anything about them that suggests what they are? Exactly my point. You tell your readers that your SD is armed with X number of Grasers, and they won't know what you're on about until someone says 'Fire Graser battery one!' Then they know it's a weapon and that's about all they need to know. Plus if you're not getting all scientifc, it lends you far greater poetic license.
Example: Compare & Contrast
"Fire!" Ordered the admiral.
The TWS Daedalus shuddered as she fired a full broadside of micro-fusion anti-proton beams into the enemy vessel, causing the atoms of it's hull to be instantly repelled from each other, and the whole ship was blown apart.

OR

"Fire!" Ordered the admiral.
The TWS Daedalus shuddered as she unleashed energies that rivaled the wrath of gods and the full might of her broadside sliced through the enemy ship's shields, ripped through it's armor and devastated the interior. Within seconds the enemy vessel was overwhelmed and exploded in a brilliant flash of light.

Now, example 1 might be 'scientifically' (I know it's a load of bollox, but bear with me) but example 2 sure sounds a lot better, doesn't it? And it doesn't reveal a single thing about how any of the technology actually works.

Cool, huh?