Invincible Class Fast Battleship
The brainchild of Admiral Kisher, this vessel was designed to hunt Chaos and Eldar Corsair raiders at the speed of a Light Cruiser. Despite protests from the Adeptus Mechanicus over inherent design flaws in the internal compartmentalization and issues with the back-up systems and power distribution grid, Kisher went ahead with the concept. Though the class proved very successful as an anti-piracy tool, they proved poor line battleships due to their poor protection. Traditional naval officers became disdainful of the concept, branding the class "Kisher's Kombustibles".