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Promellian Battlecruiser

Size Comp
Universe : Prime Timeline
Affiliation : Promellian
Class Name : Promellian Battlecruiser
Type : Battlecruiser [1]
Unit Run : Unknown
Commissioned : Dates uncertain, but the Promellian-Menthar war was fought approximately 1370. [1]
Dimensions : Length : 200 m [2]
Beam : 170 m
Height : 83 m
Decks : 17
Mass : Unknown
Crew : Unknown
Defence Systems : StandardLight Monotanium Single hull plus 1 cm High density armour.
Low level Structural Integrity Field
Warp Speeds
(TNG scale) :
Strength Indices :
(Galaxy class = 1,000)
Beam Firepower : -
Torpedo Firepower : -
Weapon Range and Accuracy : -
Shield Strength : -
Hull Armour : 100.31
Speed : -
Combat Manoeuvrability : -
Overall Strength Index : 7
Diplomatic Capability : Unknown, but low
Expected Hull Life : Unknown


Little is known of the Promellians; they and the Menthars fought to their mutual extinction in a major war approximately 1,000 years ago. The war was notable for the extreme destructiveness achieved with the relatively primitive weaponry of the time.

In 2366 the Enterprise-D found a Promellian battlecruiser adrift in an asteroid field. The ship was still intact, and the Enterprise-D personnel were able to go aboard and examine some of its logs. The ship had become trapped in the field by a Menthar booby trap; the asteroids had been seeded with systems which absorbed energy from the ship's Lang cycle fusion engines and re-emitted it as harmful radiation. The ship had been unable to escape, and all of its crew had eventually been killed.

The Enterprise-D was also trapped in the field, but was able to free itself. The ship destroyed both the asteroids and the promellian battlecruiser to prevent any unwary travellers becoming likewise snared. [1]

Colour key

Canon source Backstage source Novel source DITL speculation


# Series Season Source Comment
1 TNG 3 Booby Trap
2 Speculative Approximation, based on Visual comparison to Enterprise-D.
Series : TNG Season 3
Episode : Booby Trap
Source : Speculative
Comment : Approximation, based on Visual comparison to Enterprise-D.


The Promellian battlecruiser was seen in TNG "Booby Trap", in which Data recounted the history of the Promellian/Menthar war. The final battle of the war completely destroyed the planet Orelious IX, which implies that there was a very impressive level of firepower being thrown around. It's not stated whether these ships carried that kind of destructive ability; if they did then either they mounted some very powerful weapons, or there were an awful lot of them.

Most likely the destruction occured through something akin to Soran's trilithium solar probe; Trilithium resin is a by-product of the E-D warp drive, so if the Promellians were warp capable they could well have had access to it also. Being able to turn trilithium resin into trilithium, and then using it to destroy stars, is apperently no easy process - but giving the Promellians this kind of technology is certainly more believable than giving their ships the kind of firepower that Species 8472 have.

One aspect of Promellian technology which is astoundingly impressive - after a thousand years of drifting derelict, the ship still had full life support, lighting and artificial gravity!

© Graham & Ian Kennedy Page views : 54,062 Last updated : 6 Apr 2013