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D4 class

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The D4 class was a type of small Klingon patrol ship used by the Klingon Empire in the alternate reality in the mid 23rd century. (Star Trek Into Darkness)


The D4 class was armed with two directed energy cannons on top of the wings near the fuselage. The homing green energy blasts from the cannons could arc through the air before impacting a target. The engine had a single aft exhaust. The wings could be angled in various ways, giving the ship high-speed atmospheric maneuvering capabilities and allowing it to maneuver through tight spaces. The ship had landing capabilities. Troops from the ship could also be deployed on cables mid-flight from four hatches in the underside of the craft. (Star Trek Into Darkness)


In 2259, three of these vessels intercepted the K'normian trading ship that was confiscated by the crew of the USS Enterprise during the Mudd Incident. The trade ship was carrying James T. Kirk, Spock, Nyota Uhura, Hendorff and another security officer over the Ketha Province on Qo'noS. The D4 class ships forced the trade ship to land. The ships were later destroyed by Khan Noonien Singh. (Star Trek Into Darkness)


Background information

Concept artist James Clyne designed the original sketch for the D4 class Klingon fighter. Visual effects artists at Pixomondo heavily detailed the industrial-type fighter ship design. Their refinements of the class came from extrapolating how it might look, based on how they envisioned Qo'noS to look in Star Trek Into Darkness. At Pixomondo, the D4 class was modeled by CG Supervisor Enrico Damm and Compositing Supervisor Dan Cobbett, rendered in V-Ray.

The Pixomondo team gave the D4 class a "Bird-of-Prey" feel. [1] Alex Kurtzman said about the Bird-of-Prey, "You can't really reinvent the basic shape of it. You can update it in a way that's consistent with the way we've updated the rest of [Star Trek], so there's a highly militarized take on it. It was always militarized, but even more so now." [2]

Pixomondo Visual Effects Supervisor Ben Grossmann has stated that the ship was designed “not in the traditional namesake of the Klingon Empire, but more of like […] a bad-ass predator. You had this larger more predatory hawk." Grossmann also regarded the Klingon ship as slightly less "nimble" than the trading ship. [3]

Pierre Drolet designed another version of the ship, which more closely resembles the prime reality's Klingon Bird-of-Prey. It was rejected by the film's art department before he finished modelling it, but he opted to complete it after receiving requests from fans who looked at the unfinished version. [4]

In "Unexpected", Vorok's battle cruiser was originally designed by John Eaves to be a prime universe counterpart D4 class starship. However, the K't'inga-class CGI model was reused to represent the ship when it appeared in the episode.


Mattel S4 Hot Wheels D4 Class KBoP

Hot Wheels "Klingon Bird-of-Prey"

According to the novelization of the film, the D4 was a “Bird-of-Prey” scout ship and a patrol vessel.

A Klingon starship with identical hull configuration, but much larger, closer to the size of the Constitution-class, appeared in Countdown to Darkness, Issue 4.

Hasbro Kre-O Star Trek Klingon Bird-of-Prey

Kre-O "Klingon Bird-of-Prey"

Hot Wheels released a miniature of the D4 class in 2013 and identified it as a "Klingon Bird-of-Prey". The Kre-O version is also packaged with the same name.

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