D-21 (D’Ktagh) Class IX Attack Cruiser

«Last Updated – October 11, 2017»


Original Art

Artwork & Original Stats by Christopher Cornelius

Known sphere Of Operation: Empire-wide Use
Data Reliability: C for A, B & C model; B for D & E model
Major Data Source:Klingon Sector Intelligence

NOTES:
On 2285, as the Empire continued to push it boarders against the Romulans and the Federation, it was decided to produce a new kind of ship to help push the boarders out. In 2286, it was decided to produce a new kind of vessel, the D-21 D’Ktahg class of attack cruiser, named for the honorary blade carried by most Klingon warriors. But the D-21 would see dismal failure as an attack vessel, when serious flaws in systems became apparent. By the end of it’s first year of production, three A models had been destroyed and one scrapped, after overzealous Klingon captains had engaged Romulan and Federation heavy cruisers with superior ranged weapons. It was found the D’ktahg was lacking something and it was a rear firing torpedo and improved shields, along with other ship systems. When these problems were fixed the vessel was to take a new variant and it was decided to produce the B version with the corrections.

By 2288, the B variant had been launched, and was immediately a success. Soon afterward, the Romulans became extremely interested in the D-21 as a medium cruiser. In mid 2293, the Romulans launched a large task force with the single purpose to capture a squadron of D-21s. Although the initial attack by the Romulans had proved damaging to the Klingon vessels, the close in nature of capture operations became the Romulans undoing. As the Romulan vessels closed with the damaged D’Ktahg’s the Klingons turned and fired their weapons. The Romulans had not counted on the aft firing torpedoes. By the end of the battle, the Romulans had lost two Whitewinds, with two others severely damaged, and three Bright One destroyers. Although one D-21 was destroyed, two others were finally captured. The battle caused quite a stir in the Romulan high command, and the loss of the small fleet gave the Klingons a tactical advantage for nearly four months.

Although originally intended to be mass produced, the destruction of Praxis effected the D-21 like so many other ship designs in the Klingon inventory. Production of the A and B model was severely reduced, with only one or two new hulls coming off the assembly line per year. In 2302, the last D-21a was commissioned. Only continued pressure from the Romulans and Cardassians kept the D-21 in production. In 2312, designers presented an updated variant, the D-21c to replace the now aging D-21a and b. Intended as pure refit, designers were surprised when an order for 100 new hulls was issued. The D-21c began production in 2314.

Unlike the A and B models, the D-21c returned to using the KWC power plant. Although not nearly as fuel efficient at the KWF system, the KWC was far older and more reliable, requiring less continued monitoring during operations. This allowed the refit of the primary weapon system as well as an increase in the defensive shields. The C model would also be the primary refit variant of all remaining A and B models. Despite an initial order for 100 of these capable vessels, only 40 were produced before the order was cancelled. Unconfirmed reports indicate that the House Jurris was punished for some unknown transgression.

In 2338, production of the new D-21d was approved. Rush orders for 20 of these were issued even as cancellation of the C model was initiated. The D model saw the obligatory increase in weapons and components, but also saw the first use of the KSX quad-inducer shield system. That gave ship commanders a significant amount of additional power to the weapon systems during combat. While The KSX was expensive and difficult to repair once damaged, it’s popularity meant the D-21 would go on to serve well into the late 2380’s.

The final variant to be fielded was the D-21e. The E models increased most of the on-board system and became a popular front-line patrol cruiser. The E saw extensive combat during the short-lived Federation-Klingon war initiated by the Changelings. It also saw extensive use during the Dominion war.

Of the 155 D-21’s built, 5 are listed as missing (2 A’s, 1 C and 2 E’s), including 3 that are believed in use by the IKS. 44 have been destroyed (5 A’s, 2 B’s, 4 C’s, 2 D’s amd 31 E’s). 14 have been scrapped (1 A, 2 C’s and 11 E’s) and 6 have been captured (1 B by the Federation, 1 B by the Romulans, 3 E’s by Dominion forces and 1 E by Cardassian forces.) 2 D’s were sold to private interests in the Triangle. 10 C’s and 69 E’s are in reserve fleets and 5 D’s are in service to Ranking Families in the Empire. 53 A’s and 34 B’s were converted to C models. 110 C’s were converted to D’s and 117 D’s were eventually converted to E models.

The vessel was produced at the Jurris Industrial Inc. Yard 2 of Fonwal.


Construction Data:
Model – a b c d e
Ship Class – IX IX IX IX IX
Date Entering Service – 2286 2288 2314 2338 2359
Number Constructed – 61 38 40 16 Refit
Hull Data:
Superstructure Points – 30 32 35 38 40
Damage Chart – C C C C C
Size:
Length – 200 m 200 m 200 m 200 m 200 m
Width – 130 m 130 m 130 m 130 m 130 m
Height – 45 m 45 m 45 m 45 m 45 m
Weight – 134,590 mt 138,250 mt 122,585 mt 127,770 mt 133,175 mt
Cargo:
Total SCU – 420 SCU 430 SCU 430 SCU 430 SCU 430 SCU
Cargo Capacity – 21,000 mt 21,500 mt 21,500 mt 21,500 mt 21,500 mt
Landing Capacity – None None None None None
Equipment Date:
Control Computer Type – ZD-7 ZD-7 ZD-9 ZD-9 ZI-3
Transporters:
Standard 6-person – 2 2 2 2 2
Combat-22 person – 3 3 3 3 3
Emergency 18-person – 3 3 3 3 3
Cargo – 4 4 4 4 4
Cloaking Device Type: KCC KCC KCC KCC
Power Requirements: 32 32 32 32
Other Data:
Crew – 460 470 472 475 473
Troops – 100 100 100 100 100
Passengers – 15 15 15 15 15
Shuttlecraft – 6 6 6 6 6
Engines And Power Data:
Total Power Units Available – 55 55 59 59 62
Movement Point Ratio – 3/1 3/1 3/1 3/1 3/1
Warp Engine Type – KWF-1 KWF-1 KWC-2 KWC-2 KWC-2
Number – 2 2 2 2 2
Power Units Available – 16 ea. 16 ea. 18 ea. 18 ea. 18 ea.
Stress Chart – H/J H/J L/O L/O L/O
Max Safe Cruising Speed – Warp 8 Warp 8 Warp 8 Warp 8 Warp 8
Emergency Speed – Warp 9 Warp 9 Warp 9 Warp 9 Warp 9
Impulse Engine Type – KIF-2 KIF-2 KIF-2 KIF-2 KIK-1
Power Units Available – 23 23 23 23 26
Weapons And Firing Data:
Beam Weapon Type – KD-13 KD-13 KD-16 KD-16 KD-18
Number – 8 8 8 8 8
Firing Arcs – 2 f/p, 2 f/s, 2 p/a, 2 s/a 2 f/p, 2 f/s, 2 p/a, 2 s/a 2 f/p, 2 f/s, 2 p/a, 2 s/a 2 f/p, 2 f/s, 2 p/a, 2 s/a 2 f/p, 2 f/s, 2 p/a, 2 s/a
Firing Chart – X X Y Y U
Maximum Power – 5 5 6 6 11
Damage Modifiers:
+3 (1-7) (1-7) (1-9) (1-9) (1-7)
+2 (8-15) (8-15) (10-17) (10-17) (8-15)
+1 (16-22) (16-22) (18-22) (18-22) (16-20)
Beam Weapon Type – KD-15 KD-15 KD-18 KD-21 KD-21
Number – 2 2 2 2 2
Firing Arcs – 1 f/p, 1 f/s 1 f/p, 1 f/s 1 f/p, 1 f/s 1 f/p, 1 f/s 1 f/p, 1 f/s
Firing Chart – T T U W W
Maximum Power – 10 10 11 17 17
Damage Modifiers:
+3 (-) (-) (1-7) (-) (-)
+2 (1-18) (1-18) (8-15) (-) (-)
+1 (-) (-) (16-20) (1-18) (1-18)
Torpedo Weapon Type – KP-3 KP-3 KP-8 KP-12 KP-20
Number – 1 2 2 2 2
Firing Arcs – 1 f 1 f, 1 a 1 f, 1 a 1 f, 1 a 1 f, 1 a
Firing Chart – R R S P R
Power to Arm – 2 2 2 2 1
Damage – 15 15 24 28 30
Shield Data:
Deflector Shield Type – KSL KSP KSS KSX KNSH
Shield Point Ratio – 1/3 1/3 1/3 1/4 1/4
Maximum Shield Power – 14 15 26 32 50
Combat Efficiency:
D – 140.4 144.8 171.6 212.3 247.2
WDF – 69.8 78.8 104.6 115.4 133.8