Naw, what was I thinking? The PDBs are 4-rail things. They don't have the same structure as the big ones, more like big box that pivots a bit. Only decent pic I'm using is
this. I know it looks like two rails, but I'm sure it's 4. Had to use a vid I, err,
acquired to be sure. I wouldn't want to try pics, too low res. Took me a lot of views to be sure.
So...what are thinking about doing for the PDBs? That's a lot more guns than I've ever seen anyone put on a ship. In any game.
As to what these guns are, they are offically called railguns as far as I know, and I'm sure they do fire physical shells rather than 'plasma bolts' or some other standard of TV/movie sci-fi, but how they actually function and what relation they have to modern-day railguns is unclear. Judging just by visuals it looks like they're using boring-old chemical propulsion (can anyone else think of a reason for the flames?), and though my education in electromagnetics is sorely lacking it's been pointed out to me that three rails at 120 degrees isn't a workable design if you're making what we call a railgun.