D-7 Class - Specs

Refit

Universe :	Prime Timeline
Affiliation :	Klingons
Class Name :	D-7 Class
Type :	Cruiser (Obsolete)
Unit Run :	437 built in total. 102 have been lost in all. 335 have been retired from service.
Commissioned :	2267 - 2270, remained in service until 2370
Dimensions :	Length : 228 m [1] Beam : 160 m [2] Height : 60 m [2] Decks : 18
Mass :	307,000 metric tons
Crew :	480
Armament :	10 x Mark 7 disruptor cannon [3], total output 5,500 TeraWatts 2 x Basic photon torpedo tube [3] with 260 rounds
Defence Systems :	Standard shield system, total capacity 81,000 TeraJoules Heavy Monotanium Double hull plus 5 cm High density armour. Standard level Structural Integrity Field
Warp Speeds (TOS scale) :	Normal Cruise : 5 Maximum Cruise : 6 Maximum Rated : 8 for 10 hours.
Strength Indices : (Galaxy class = 1,000)	Beam Firepower : 110 Torpedo Firepower : 100 Weapon Range and Accuracy : 40 Shield Strength : 30 Hull Armour : 520 Speed : 267 Combat Manoeuvrability : 5,720
Overall Strength Index :	139
Diplomatic Capability :	None
Expected Hull Life :	100
Refit Cycle :	Minor : 5 year Standard : 5 years Major : 20 years

Notes

Refits and upgrades kept the original D7 an effective combat vessel throughout most of its long service life, but by the mid 2200s the Federation was fielding designs such as the Constitution class [4] which considerably outclassed it. As a result, the Klingons fielded a modified version of the ship during the 2260s. This variant shared the same basic hull form with the original vessel, but included various detail changes. A cleaner hull [4] allowed for slightly increased subspace streamlining; combined with redesigned nacelles this increased the top speed. The armament was also boosted.

Despite the changes, the refitted D7 was still not a match for the Constitutions. Several skirmishes occurred with the Federation during the 2260s, generally pitting the D7 against the Constitution class Starships. The Federation design was generally the victor in these encounters. [5]

Eventually the D7 class was retired in favour of the succeeding K'T'Inga class.

Colour key

References

#	Series	Season	Source	Comment
1			Generic official information
2			Generic official information
3			Generic canonical information
4			Various Original Series episodes
5	TOS	3	Elaan of Troyius

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Last updated : 20 Sep 2016

Series :	TOS Season
Episode :	Various Original Series episodes

Series :	TOS Season 3
Episode :	Elaan of Troyius