Qoj class

The Qoj-class was a Klingon starship class, a dreadnought type in service to various Great Houses of the Klingon Empire in the 2250s decade. 

Specifications
The class name meant war in Klingonese. ( partwork)

This was one of four Klingon attack ship classes, all variants of the same basic spaceframe. Besides the Qoj, the other Klingon attack ship classes were, and. The ship consisted of a spear-like elongated primary hull, framed by a pair of long, bulky and forward-facing warp nacelles with weapon ports. The nacelles and neck section were connected by a compact engineering hull marked with a circle and impulse engines at its stern. The Qoj was a dreadnought, armed with disruptor beam arrays and photon torpedo launchers. 

From 2256, ships of the class belonging to Great Houses loyal to Kol, son of Kol-Sha received a House of T'Kuvma cloaking device. 

Service history
Ships of the class were employed by the Klingon Great Houses by 2256. 

Ships of this class were also used by Klingons of the mirror universe around the same time. 

Several vessels of this class fought in the war between the Federation and Klingon Empire, also known as Burnham's War, starting with the Battle of the Binary Stars in May 2256. 

Ships of the class, including from a 2256-era mirror universe, were involved with transtemporal events instigated by $𝜇$ at Pahvo in 2410.