D-7 (Various Names) Class VII-X Battlecruiser (FASA Variants)

«Last Updated – October 9, 2017»


Original design by Matt Jefferies
Upgrade design by Andrew Probert

Known sphere Of Operation:Empire wide use
Data Reliability: A (all models but D-7S); D for D-7S
Major Data Source: All but D-7S in Star Fleet possession; Klingon Sector Intelligence

The D-7 is probably the most infamous cruiser ever to stalk the spacelanes. These ships are associated with death and destruction on a scale second to none. When first introduced, these vessels captured the minds and spirits of the Klingon commanders so fully that for many years they were the symbol of Klingon tyranny.
This design was developed from the earlier D-4 cruiser and incorporated all of its most popular features. The command pod mounted forward on the boom assembly and the wing-like main hull were changed slightly in the design, but all of the basic concepts were retained. In all models, the command pod can be jettisoned in case of emergency. A small micro-impulse drive system, mounted into the pod just for such emergencies, allows the pod to maneuver itself and travel short distances in hopes of rescue. A pod can maintain the life-support systems and operate the short-range sensors and weapons for up to one year. One of the main features of the pod is the disruptors mounted below the bridge; these weapons will give protection from hostiles and also allow for the self-destruction of the pod if capture is imminent.

The secondary bridge, weapons control, and all engineering facilities are located in the main hull. Separated from the command pod, this section of the vessel is capable of maintaining fully functional life-support, weapons, and engine systems for up to two years. Of course, this section is capable of warp speeds and will effect its own rescue much quicker than can the command pod. Within the engineering section of the main hull are the matter/anti-matter mix chambers, little shielded, as servitor races man the engineering compartments of most Klingon vessels. All D-7 models are capable of jettisoning the warp engines in case of an uncontrolled mix in the matter/anti-matter chamber. This would leave the ship with only the impulse engines for power. In most cases where warp engines have had to be ejected, the command pod has been separated first to insure the captain will be safe. In the center section of the main hull are compartments containing hypothermia capsules for the marines. The troops are kept in a frozen state until they are required, which reduces the requirement for food and life-support and thus prolongs the on-station time of the ship.

Introduced in early 2243, the D-7A didn’t see any action in the Unknown War, but the lessons learned from this conflict were reflected in its design. By Stardate 1/9302, eight separate manufacturing facilities were producing this model at a rate of five per month. When the Four Years War broke out, production of these ships soared to twelve per month within the first year and peaked at 26 per month by the third year. The Klingons, having brought the war on, were ready with over 400 of these ships in the front-line; studies have shown that this numerical advantage was the prime factor in their early advances into Federation territory. On a one-to-one basis, Federation cruisers and frigates were far superior as warships, but their limited numbers prevented them from turning the Klingons back in the early stages of the war. The D-7A class, named “Painbringer” from the Klingon K’t’agga, served the Klingon Imperial Navy well in the war with a high reliability rating and ease of repairs.

Of the 1,671 D-7A’s produced, 431 remain in active service, 83 have been placed in reserve fleets, 12 are used by the Klingon Naval Academy as training vessels, 891 have been destroyed, 23 have been captured (10 by Star Fleet and 13 by the Romulans), 15 are listed as missing, 26 have been scrapped, 170 have been traded to the Romulans, and 20 have been sold to ranking families within the empire.

The D-7C, introduced at the close of the Four Years War, saw no action in that conflict, but it was given its baptism of fire just seven months after entering service. The D-7C’s involved in the incident were so badly outclassed by their RomuIan adversaries that the design was never fully accepted by starship captains, and the model was finally removed from service on Stardate 2/2004.
The D-7C, named “Bringer Of Destiny’ from the Klingon K’t’kara, had more efficient warp engines than those mounted on the D-7A, but they were incapable of powering all the weapons even though the ship was more maneuverable. The designers felt that the increased warp speed and maneuvering ratio would make this ship more cost-effective, even though it was a dismal failure because of it failed to meet its design requirements as a gunship due to its inability to power all its disruptors during combat. Furthermore, though the D-7C had slightly improved shielding, this advantage was lost due to its weaker superstructure. For some unexplained reason, Klingons have never put larger warp engines on this ship, though it seems that, if this had been done early in its career, it certainly would have outclassed anything the Romulans or Star Fleet had at the time.

Of the 162 D-7Cs built, 52 have been placed in reserve fleets, 66 have been destroyed, 13 captured (9 by Star Fleet and 4 by the Romulans), 4 listed as missing, 18 sold to the Orions, 6 sold to prominent families within the Empire, and 4 sold to private groups or individuals in the Triangle.

The D-7G, named “Truthbringer” after the Klingon K’t’alla, was the direct result of the first Romulan-Klingon technology exchanges, as part of which the Klingons received 24 Romulan plasma weapons of the RPL-1 type. Sixteen of these were immediately installed on D-7s, and the remaining weapons were given to weapons research firms within the Empire. The conversions to D-7G’s were made on D-7A’s which otherwise remained the same. The plasma weapon design required the ship to be close to the enemy in order to fire, and most Klingon commanders did not like the tactics that the weapon dictated, hence no Klingon commander felt comfortable with the conversions. Of the l6 D-7G’s built,10 were converted to D-7R’s, 4 were destroyed, 1 was captured by Star Fleet, and 1 is in the service of a ranking family within the Empire.

The D-7M, introduced on Stardate 2/1105, was a match for the Federation Constitution and Romulan V-6 (Gallant Wing) cruisers. This gave the Klingon navy a slight advantage along its borders, and the Imperial Command began to press the balance more aggressively. Both the Romulan navy and Star Fleet commissioned upgraded versions of their vessels shortly after the appearance of the D-7M in order to hold the Klingons in check. Within two years after its introduction into service, 75% of all facilities producing the D-7A had been converted to manufacture the D-7M, allowing the Klingons to place more and more of these ships in sensitive areas. As the Klingons grew bolder, these ships began to appear in the Organian Treaty Zone and in the Triangle. Traveling in groups of threes, sorties were made by Klingon commanders into areas that were declared neutral or de-militarized, and several worlds were subjugated by small forces of these ships.
The D-7M mounts the KWE-3 warp engine, which (in this configuration) gives more efficient power for maneuver and added power for the weapons systems; this warp drive system allowed the D-7 to travel at Warp 8 and, in an emergency, Warp 9. The KD-6 disruptors were replaced with the more powerful KD-8s, extending the offensive range of the ship to 200,000 km. An additional improvement, giving a punch that surprised many Romulan and Star Fleet commanders when first encountered, was the KP-3 photon torpedo mounted both fore and aft. Improved shielding was also added, increasing its capabilities by 50%. Several vessels of this type, named “Bringer Of Destruction” from the Klingon K’t’inga, have gained a level of fame equal to that of the USS Enterprise, most notably the IKV Bardur. The Bardur is known to have destroyed over 20 Romulan vessels, 10 Federation vessels, and participated in skirmishes that have accounted for the loss of over 40 enemy ships. The captain of this ship has been promoted to Admiral and, much like his Federation counterpart, remains in command of his vessel, now the smallest ship in known space to be a fleet flagship. The current position of this fleet is in the Orion sector, operating from the border starbase located there.

Of the 1,244 D-7M’s built, 965 remain in active service, 198 have been destroyed, 8 have been captured (5 by Star Fleet and 3 by the Romulans), 11 have been scrapped, 36 are in the service of ranking families of the Empire, and 21 have been reported as missing. Three of those missing were destroyed during the V’ger Incident, and several others are known to be operating in the Triangle under the command of renegade Klingons. The D-7R, named “Bringer Of Agony” after the Klingon K’t’rika, was another attempt by the Klingons to make use of the plasma weapons, this time incorporated into the improved D-7M hull with the photon torpedo bays removed. The RPL-1 was placed in the bow of the ship and an additional KD-8 disrupter was placed in the aft compartment. In addition to these changes, a KCC cloaking device was added. The Klingons had learned by this time that the plasma weapon and cloak were designed to be used together, often by remaining cloaked and stationary in the path of their adversary before decloaking and firing the plasma bolt at minimum range.

Of the 32 D-7R’s built, 29 remain in active service, 2 have been destroyed, and 1 has been captured by Star Fleet.

The D-7S, the newest of this line of cruisers, is an improved version of the D-7M, appearing to be a D-7M at first glance. Only well-trained personnel will be able to tell the difference on a sensor scan, but these cruisers mount six KD-8 disruptors and fore and aft-firing KP-4 torpedoes. In addition, some models carry the KCC cloaking device.
The D-7S, named “Bringer Of Justice” from the Klingon K’t’mara, is being produced at the same facilities as the D-7M, which intelligence reports show will be phased out for this much-improved version; the facilities at Taamar, Gnuu Re’, losia, H’rez, and Z’hai are producing 40 M models and 22 S models per year, Of he 66 D-7Ss built, 65 remain in active service and one has been listed as missing. Although Star Fleet has encountered these vessels, none have been destroyed or captured. Orion reports from within the Triangle suggest that the Klingons are operating several small groups there.

One of the most venerable and numerous vessels in the Klingon inventory, no other vessel exemplifies the Klingon Empire like the D-7 Cruiser. In production for over 90 years, the D-7 has had more variants and modifications than any other starship in known space. Shortly after the introduction of the D-7s, designers began to realize that the massive and bulky KWE-3 drive system was limiting the combat capabilities of the venerable vessel. The massive coolant tanks and control systems required by the KWE drive forced the empire to underpower the impulse drive and limited interior spaces allowed for computer components and shield systems. Although the D-7 had been successful as a weapons platform, talk of retiring the class was soon in the forefront of military planning sessions. The Drell Corporation, initial designers of the D-7, fought vehemently to counteract the sudden lust for the Bird of Prey classes of vessel, and in 2275, finally made the concession to reduce the main drive bulk to accommodate a larger impulse drive. The benefits were immediate, and breathed new life into the D-7 production. Coupled with a lighter drive, the enlarged impulse drive, enlarged computer, and strengthened shields all brought the D-7 up to comparable levels with both Federation and Romulan cruisers.

In early 2277, the first D-7t’s were completed and immediately began service as command vessels for combat squadrons. Later, in 2278, the Chancellor of the Klingon High Council personally bought a D-7t, naming it after the home-world and using it as his personal flagship. This trend would continue for nearly 50 years, with venerable vessels passing from one chancellor to the next. None the less, the new equipment was expensive and time consuming to install, and production of the D-7 was cut nearly in half. By 2280, the production rate was down to 15 per year, and would never again return to the high “war” production levels.

Design work would continue during the early 2280’s with the eventual launch of the D-7u. The D-7u improved the impulse drive and shield technologies, giving the D-7 equal footing against Romulan vessels. Several designers also began looking at new ways to increase the boundaries of the Empire in an attempt to stave off the still necessary peace accords. The scientific and exploratory successes of the D-9 class spurred designers to increase the science base of the D-7, reducing the number of troops and their support network. By 2287, an even more improved version, the D-7v was under construction. The D-7v used the experimental ZD-9 computer, which had not yet been successfully tested on so light a vessel. Fears that the computer would overpower the onboard systems proved unfounded, and the D-7v was rushed into production. The D-7v was the first cruiser to use the new KIF-2 drive system, which provided more power then the smaller KIE-2. Also incorporated in the design was the new KSQ shield system, which was finally delivered some 10 years after the KST. The most dangerous new system incorporated in the D-7v was the new KP-8 Torpedoes. Although requiring the same power as the KP-6, the KP-8 had better range and were easier to produce and repair, extending the striking range of the D-7. The D-7v would continue in production, until 2293. In 2293, after the destruction of the Klingon moon of Praxis, Klingon production of warships fell dramatically, and upgrades of existing ships and designs became a massive priority for the now cash stricken empire. Despite possible peace accords with the Federation, increasing tensions with the Romulan Empire forced Klingon designers to continue research into starship design.

Even with it’s need, it was not until 2295 that the Klingon Empire was able to produce a new variant of the D-7.The D-7w was first proposed as a massive improvement to the current D-7v . The D-7w became the center piece of the Klingon military efforts, with construction boosting to nearly 10 per year. The D-7w was considered the perfect medium cruiser, armed with KD-17, capable of increasing the striking distance of the D-7 from 200,000 to 240,000 km. The D-7x, one of the last variants of the D-7 to be produced, incorporated the devastatingly powerful KP-11 torpedo system, giving the D-7x the equivalent firepower of vessels twice it’s size. None the less, the D-7 is now considered a light cruiser, even in the Klingon inventory. The D-7w and the remaining D-7 variants have all become highly automated, reducing crew compliments by 1/3. The D-7w has no troop compliment, opting for improved sensor equipment and new safety features incorporated from Federation/Klingon technology exchanges. The D-7 is still in production at Fonwal and Iosha at a rate of 8 per year. This rate is expected to drop slowly, unless new resources are found to supplement current production facilities. Of the 400 D-7s recently built, 304 remain in active service, most currently on patrol duty within the empire or near Romulan space. To date, 10t’s, 7u’s, 8v’s, and 6w’s have been destroyed. 4t’s, 2v’s, 1w’s, and 3x’s are listed as missing, most believed lost in battle. 3t’s and 5v’s have been scraped due to various natural encounters, and 18w’s, and 10x’s have been scraped after combat encounters. 2t’s, 10w’s, and 1x are used as training vessels. Two w’s and one x are listed as captured. Two t’s and one v’s were sold to interests outside the empire. The D-7t is named for the Klingon “K’t’ may’moH” which translates to Bringer of Battle. The D-7v is named for “K’t’ HajmoH” which translate to Bringer of Dread. The D-7w is named for “K’t’GhlimoH” which is translated as Bringer of Judgment. for the D- 7x has not yet been discovered, although the class is though to be called the Bringer of Power.

Construction Data:
Model – a c g m r s t v w x y z
Date Entering Service – 2243 2256 2269 2269 2269 2277 2288 2290 2300 2314 2343 2363
Number Constructed – 1671 162 16 1244 32 66 241 185 72 102 153 27
Hull Data:
Superstructure Points – 20 18 20 22 22 24 34 34 35 35 40 44
Damage Chart – C C C C C C C C C C C C
Length – 216 m 216 m 218 m 221 m 218 m 221 m 228 m 228 m 228 m 228 m 228 m 228 m
Width – 152 m 152 m 152 m 156 m 152 m 156 m 171 m 171 m 171 m 171 m 171 m 171 m
Height – 55 m 55 m 55 m 62 m 55 m 62 m 63 m 63 m 63 m 63 m 63 m 63 m
Weight – 100,258 mt 89,058 mt 100,378 mt 139,243 mt 138,863 mt 142,893 mt 121,560 mt 122,960 mt 121,420 mt 121,265 mt 132,450 mt 138,850 mt
Total SCU – 120 SCU 120 SCU 100 SCU 120 SCU 80 SCU 160 SCU 160 SCU 160 SCU 160 SCU 160 SCU 160 SCU 160 SCU
Cargo Capacity – 6,000 mt 6,000 mt 5,000 mt 6,000 mt 4,000 mt 8,000 mt 8,000 mt 8,000 mt 8,000 mt 8,000 mt 8,000 mt 8,000 mt
Landing Capacity – None None None None None None None None None None None None
Equipment Date:
Control Computer Type – ZD-5 ZD-5 ZD-5 ZD-6 ZD-6 ZD-6 ZD-7 ZD-9 ZD-9 ZD-9 ZI-3 ZI-3
Standard 6-person – 3 3 3 3 3 3 3 3 3 3 3 3
Combat-22 person – 5 4 4 5 4 5 5 5 5 5 5 5
Emergency 18-person – 1 1 1 1 1 1 1 1 1 1 1 1
Cargo – 2 2 2 2 2 2 2 2 2 2 2 2
Cloaking Device Type: None None None None KCC KCC KCC KCC KCC KCC KCC KCC
Power Requirements: 32 32 32 32 32 32 32 32
Other Data:
Crew – 352 352 360 373 378 375 375 375 380 382 383 384
Troops – 220 180 110 220 110 220 220 60 60
Passengers – 30 20 20 20 80 80
Shuttlecraft – 5 5 5 5 5 5 5 5 5 5 5 5
Engines And Power Data:
Total Power Units Available – 40 32 40 44 44 44 48 59 59 59 69 69
Movement Point Ratio – 4/1 3/1 4/1 3/1 3/1 3/1 3/1 3/1 3/1 3/1 4/1 4/1
Warp Engine Type – KWD-1 KWC-1 KWD-1 KWE-3 KWE-3 KWE-3 KWC-2 KWC-2 KWC-2 KWC-2 KWC-3 KWC-3
Number – 2 2 2 2 2 2 2 2 2 2 2 2
Power Units Available – 18 ea. 14 ea. 18 ea. 20 ea. 20 ea. 20 ea. 18 ea. 18 ea. 18 ea. 18 ea. 23 ea. 23 ea.
Stress Chart – L/N L/O L/N J/M J/M J/M L/O L/O L/O L/O L/O L/O
Max Safe Cruising Speed – Warp 6 Warp 7 Warp 6 Warp 8 Warp 8 Warp 8 Warp 8 Warp 8 Warp 8 Warp 8 Warp 7 Warp 7
Emergency Speed – Warp 8 Warp 8 Warp 8 Warp 9 Warp 9 Warp 9 Warp 9 Warp 9 Warp 9 Warp 9 Warp 8 Warp 8
Impulse Engine Type – KIC-2 KIC-2 KIC-2 KIC-2 KIC-2 KIC-2 KIE-2 KIF-2 KIF-2 KIF-2 KIF-2 KIF-2
Power Units Available – 4 4 4 4 4 4 12 23 23 23 23 23
Weapons And Firing Data:
Beam Weapon Type – KD-6 KD-6 KD-6 KD-8 KD-8 KD-8 KD-8 KD-8 KD-17 KD-17 KD-19 KD-19
Number – 4 7 4 4 4 6 8 8 8 8 8 8
Firing Arcs – 2 f/p, 2 f/s 2 f/p, 1 f, 2 f/s, 2 f/p, 2 f/s 2 f/p, 2 f/s 2 f/p, 2 f/s, 1 a 2 f/p, 2 f/s 2 f/p, 2 f, 2 f/s, 2 f/p, 2 f, 2 f/s, 2 f/p, 2 f, 2 f/s, 2 f/p, 2 f, 2 f/s, 2 f/p, 2 f, 2 f/s, 2 f/p, 2 f, 2 f/s,
2 a 1 p/a, 1 s/a 1 p/a, 1 s/a 1 p/a, 1 s/a 1 p/a, 1 s/a 1 p/a, 1 s/a 1 p/a, 1 s/a 1 p/a, 1 s/a
Firing Chart – T T T U U U U U X X X X
Maximum Power – 6 6 6 7 7 7 7 7 9 9 12 12
Damage Modifiers:
+3 (-) (-) (-) (1-7) (1-7) (1-7) (1-7) (1-7) (1-12) (1-12) (1-14) (1-14)
+2 (1-18) (1-18) (1-18) (8-15) (8-15) (8-15) (8-15) (8-15) (13-17) (13-17) (15-18) (15-18)
+1 (-) (-) (-) (16-20) (16-20) (16-20) (16-20) (16-20) (18-22) (18-22) (19-22) (19-22)
Beam Weapon Type – KD-6 KD-6
Number – 2 2
Firing Arcs – 1 p/a, 1 s/a 1 p/a, 1 s/a
Firing Chart – T T
Maximum Power – 6 6
Damage Modifiers:
+3 (-) (-)
+2 (1-18) (1-18)
+1 (-) (-)
Torpedo Weapon Type – RPL-1 KP-3 RPL-1 KP-4 KP-6 KP-8 KP-8 KP-11 KP-16 KP-22
Number – 1 2 1 2 2 2 2 2 2 2
Firing Arcs – 1 f 1 f, 1 a 1 f 1 f, 1 a 1 f, 1 a 1 f, 1 a 1 f, 1 a 1 f, 1 a 1 f, 1 a 1 f, 1 a
Firing Chart – E R E Q R S S R Q R
Power to Arm – 10 2 10 2 2 2 2 1 2 2
Damage – RL-1 15 RL-1 18 20 24 24 26 36 40
Shield Data:
Shield Point Ratio – 1/1 1/1 1/1 1/2 1/2 1/2 1/3 1/3 1/3 1/3 1/4 1/4
Maximum Shield Power – 8 9 8 12 12 11 15 15 15 26 32 37
Combat Efficiency:
D – 54.6 54.2 54.6 90.5 90.5 92.3 137.1 153.6 155.1 171.6 201.2 212.9
WDF – 20.4 35.7 24.3 52.6 43.6 56.2 72.4 78.8 102.8 103.8 131.4 139.6

NOTES: NOTES: This version of the D-7 is a direct update to the data presented in the FASA Klingon Starship Recognition Manual. Unfortunately, the FASA manual has a number of minor (and a few not so minor) errors. In addition – the D-7m, r and s models have had changes to better reflect the D-7 seen in Star Trek: The Motion Picture.

The following changes have been made:

Class: The D-7s has been adjusted to class X due to component weight.

Superstructure: The D-7r and D-7s have inaccurate Superstructure numbers. Additional SS points were added to the D-7m as well to keep it in line with it’s sister ships.

Weight: Listed weights are now accurate. The component weights appear to have not included the dual nature of the forward and aft torpedoes. For the D-7s, this increase in required superstructure and weight place the variant in the Class X category.

Weapons: The D-7r weapon list does not match up with the text. The printed manual show 6 KD-8’s in the D-7s configuration (2 f/p, 2 f, 2 f/s) while the text lists the removal of both torpedoes, the inclusion of the RPL-1 and the addition of an aft KD-8. Visual evidence in Star Trek:The Motion Picture show six (6) disruptors – 2 under the fore-castle, 2 at the neck joint and 2 under the shuttle bay. (This same discrepancy can be seen in the Enterprise refit.) To keep the D-7m a class IX ship, two additional KD-6’s were added for the D-m and D-7r to represent the two disruptors found under the shuttle bay.
D Factor: The Defensive Factor for the D-7m, D-7r and D-7s have been adjusted accordingly.
WDF Factor: The WDF of the D-7m and D-7s appears to have not included the aft torpedoes. The WDF has been adjusted to include these weapons. Additional WDF has been added to the D-7m and D-7r.