These are E-series rail'ships (railgun gunships). Crew is in front (and can separate), generator is in back, and the entire middle stretch is the barrel of the railgun system. The maneuvering arms can fold flush with the middle (like in the two smaller ships in the background). The rail'ships are battling it out with a few spherical ARC-RAD vessels (which are already blown to bits). If you haven't guessed already, these were inspired by the ship from 2001' - the design just made a lot of sense to me. Main problem with this one is that textured areas turned a little too grey when I photographed it.