From the FASA Star Trek Starship Tactical Combat Simulator, circa 1983 - 1986
Class design by: John J. Stevens & Forest Brown
L-20 Class X Fast Battleship
Notes:  In the years following the abortive Federation/Klingon war of Organia, the Klingon High Command decided to design and construct a cpital ship thjat would exceed the capabilities of any Federation vessel.  Many officials believed the requirements were impossible to achieve, but when the Thoras Shipyards submitted their design, these same individuals were stunned.  Here was a vessel that met and, in some cases, exceeded all the minimum standards.  The L-20 designer, Captain Kangar sutai Kinzan, had proceeded under the assumption that, if cost was no consideration, anything was possible.
        The L-20 prototype, the Keth Ke Se, was completed on Stardate 2/1504 and had the distinction of being the most expensive ship ever constructed for the Imperial Navy.  This new battleship earned her name while on trials, when she single-handedly destroyed three Romulan vessels in the Triangle, taking no damage to herself.  Her main batteries were capable of crippling the most powerful vessels then in service.
        Heavy bow and stern torpedoes give the L-20 the ability to strike hard while still maintaining high speeds.  An oversized impulse engine insures that the L-20 has plenty of maneuver power.  Equipped with the best deflectors and shielding available at the time it was constructed, and given a strengthened superstructure, the L-20 prototype could take damage as well as give it.  Design specifications called for Warp 6 capabilities, but the ship delivered went a step further with a speed of Warp 7.
        An interesting addition to the lower hull is an assault shuttle bay, which adjoins the staging area for the main transporters.  This assures that a landing by the ship's compliment of 350 marines need not be halted by transporter failure or the need to maintain shielding.  The most devastating feature of the L-20 is its basic resemblance to the famed D-7 cruiser, which could lead to tragic mistakes on the part of an opposing captain.