Have I done enough research?

This is a very real concern of mine in my writing projects. Now, I know that I have done a bit of research here and there on the topic of my novels. However, from the sheer scope of what I have to do regarding this project (A real robot space opera told from the point of view of an elf and his dragon, where one side is made of almost solely of the Rome-worshiping vampires) I am always in fear that I have not done enough.

The list of things I have worked/been working on thus far research-wise:

• Politics and histories of Republican Rome.
• Structure an influence of a late medieval society's major knighthood orders.
• Designs and roles of combat real robots in a semi-realistic military settings.
• Structure, design, power source, life and everything else on a Lagrange point/planetary colony.
• Psychoanalysis of soldiers and mercenaries.

Is there anything else I am supposed to do? And any suggestions?

Jesus Christ dude, you were the guy who could write history-book entries on Vampire Cataphracts or whatever that was and make it sound awesome.

Just worry about getting your shit down on paper.

For semi-realistic fiction, you can start winging it when showing your work would stall the plot with clogs of miniscule detail.

It looks amazing to me! Really, I'm impressed! And like Leradny said, you can wing it, too. And I get the feeling you'd make it look good.

What do you have on the psychoanalysis of soldiers and mercenaries? That's been a concern of mine, actually...

Really, that one was one of the things I am most worried about. What I do have at the moment are some more-or-less-basic-wisdom-pieces gleaned from here and there, which can basically be summarized as "There is usually a reason for both cowardice and courage, and I'd better show the causes and effects of either and do researches accordingly if my depiction sounds outrageous".

In all seriousness, half of "research" is "knowing which book to turn when in doubt", IMHO. I am not sure whether it is the correct approach or attitude, but it has so far worked for me for works simple enough. For more serious stuff I intend to publish later down the line, though... is that enough?

Your research skills sound epic.

I've made this point elsewhere: ask an expert. Most professors are tickled pink by a writer consulting them on the accuracy or plausibility of their story. I'm trained in law and economics so I can give a technical critique on those points. Others have their own fields of expertise but generally the best you can hope for here is an indication of whether your writing skills suck or not.

Go to your local college, university, think tank or centre for strategic studies. Odds are that at least one person will be willing to go over your outline and give you am opinion as to whether or not it jives with current knowledge and theory in their field. Then put them in your credits and send them a copy of the publication.

Tickled pink, I tell you.

Write it, and when you get to a point where your knowledge can't explain something, research that.

I'm with Earth Sheep. Write it, and do more research along the way if you need to.

Just don't let the plot get lost in the details.

x5: Considering that's the approach I take on most of my college term papers and it's served me quite well, I'd say you're on the right track.

Colleen Mc Cullough wrote excellent stories about the Roman republic. Thes books include appendices with all the historical details.

Knights of the Golden Fleece, Knights of the Garter, check them out Wiki.

Combat robots and elves and dragons are fictional, make them up.

Lagrange points are where the gravity of Earth and Moon cancel out. The space station needs small rockets to keep exactly in position. If the engines fail the station will crash in months or years.

X% of soldiers are OK after seeing the Hell of War, Z% are traumatized. In elite regiments, X is higher. In cannon-fodder regiments Z is higher. If you are telling the story of a platoon and you want Character A to be sane and Charcter C to be mad and the background characters to be in between, then go for it.