DaSpu class

The DaSpu-class was a Klingon starship class, an escort vessel in service to various Great Houses of the Klingon Empire in the 2250s decade. 

Service history
Following roughly a century of relative peace, the Federation encountered DaSpu-class escorts when the Starfleet starship USS Shenzhou, and its backup, was attacked by representatives of 26 Klingon Great Houses at the Battle of the Binary Stars on May 11, 2256. The battle had been instigated by the fanatic T'Kuvma to reunite the Empire by rallying its houses against a common foe. 

At some point, ships of the class were part of Federation-Klingon engagements involving vessels from different cultures and eras. 

Specifications
When the Klingon Empire was in disarray, ships of the DaSpu class were fielded by several Great Houses, rather than the Klingon Defense Force. The hull consisted of a compact cylinder encrusted with numerous antenna-like spikes. A red-glowing engine exhaust sat at the aft of the craft. 

Ships of the class were rated escorts. During the Federation-Klingon War of 2256-2257, DaSpu-class starships were equipped with cloaking devices developed by the House of T'Kuvma. 

Background

 * daSpu' may be the Klingonese word for "boot spike".