Since I am making a drive-by on Star Trek, it wouldn’t be fair not to give a shout-out to possibly the sexiest ship design in all of science-fiction film.
Just phasers, photons and warp drive.
All muscle. All business.
Technically, it is called a D-7 but you can just call it sexy.
The original designs found in Star Trek: The Original Series obey my cardinal rule for starships, which is this: unless the ship is required to land on a planet (usually for story purposes) the ship should be structurally designed in such a way that it could only work in the vacuum of space. In other words, starships that look like planes strike me as atmospheric vehicles than can also venture into space. But starships are designed without gravity in mind, and therefore can have a more exotic and uneven appearance. The greatest example of this is the USS Enterprise. The USS Enterprise (NCC 1701 A thru D) doesn’t look like it can land, or even move on the water: it only looks like it can work in space and that is the point.
Introduced and escorted on to the screen with the incomparable Jerry Goldsmith’s textured, Mongolian hunting theme, with its woodwind clarion calls and Indonesia angklungs (those amazing bamboo rattles) the Klingon warship were immediately recognized as the most dangerous thing in space. Well, until V’ger effortlessly vaporized them.
Also, these were the days of highly detailed models and seriously, no CGI starship has yet to look this good.
The D7 class Klingon battle cruiser served as the backbone of the fleet for several years during the 23rd century. (TOS-R: “Errand of Mercy“, et al.) Among the mission profiles designated for this class was that of scout ship. (TOS-R: “Friday’s Child“)
By 2267, they were prominently featured in the Klingon Imperial Fleet, where they posed a serious threat to the security of the Federation and Starfleet. (TOS: “Elaan of Troyius“; TAS: “More Tribbles, More Troubles“)
Interest in these vessels by the Federation continued to appear well into the2370s, as data on this class was commonly found within numerous Starfleet files. (TNG: “The Naked Now“, “The Last Outpost“, “Conspiracy“; VOY: “Drone“, “The Voyager Conspiracy“)
Memory Alpha Wiki: Klingon D7