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UES Fireball and Comet Class


UES Fireball orthographic views

Comet orthographic views

Comet and Daedalus

Comet class in UFP markings

Comet class of Houston Energy

Comet class in FedEx livery

Comet deck plans, part 1
created by Allen Rolfes (see notes)

Comet deck plans, part 2
created by Allen Rolfes (see notes)

Courier deck plans, part 1
created by Allen Rolfes (see notes)

Courier deck plans, part 2
created by Allen Rolfes (see notes)



UES Fireball in orbit
created by Giorgio Libotte

3D model for SF Command
created by Chris Harris

Comet in Orbit
created by Thomas Pemberton

Comet approaching a moon
created by Thomas Pemberton

Comet in FedEx livery
created by Thomas Pemberton

Comet and asteroid
created by Thomas Pemberton


created by Christopher Griggs



UES Fireball (XL-5) started as an experimental cruiser built to test new technologies and new theories of warp field configuration. Fireball's hull configuration was a radical departure from preceding Earth designs, and set a paradigm for starships that endures to the present day. The project led to the construction of the Comet-class light cruisers (CLM-102), which were the fastest interstellar United Earth Stellar Navy (UESN) ships in the war (wf4.5) and saw extensive service as scouts, sensor pickets, and light strike cruisers.

In early 2156, UESN propulsion engineers at Utopia Planitia speculated that dividing a spacecraft's enveloping warp field into two asymmetrical lobes, a smaller forward penetrating lobe and a larger trailing lobe, would decrease subspace resistance and boost engine efficiency. To test this theory, Fireball was designed with the then-unusual feature of a small forward command hull separated by a thin neck from the larger trailing engineering hull. In addition, the warp nacelles were raised slightly above the ship's midline in attempt to decrease subspace vortical interference. Another first for Fireball was that her decks were arranged horizontally rather than stacked vertically along the longitudinal axis.


Fireball used an early version of the SSWR-IV reactor. This reactor was approximately 40% lighter and 50% smaller than the SSWR-II series of reactors used in earlier UESN small cruisers and allowed Fireball to be much smaller than any previous cruiser with a true M/AM drive. For most of her career, Fireball carried Typhoon A nacelles, which were later redesigned for use on the Conqueror-class cruiser. Fireball began flight tests in December 2157 and immediately proved itself a superlative design.

Although Fireball and her sister ship UES Rocket (XL-6) had been intended to serve only as test beds, the design was so promising and had matured so quickly that the decision was made in late 2158 to put a militarized version of Fireball into production. The Comet-class light cruiser began to join the fleet in October 2158. Comet's small size and superior speed made it ideal for scouting ahead of the UESN task forces that were steadily advancing into Romulan territory, locating enemy units, and reporting back on their disposition and strength.

Owing to its extremely small size, Comet's armaments were necessarily limited. Its missile bay could only carry 20 Janus mixed-use offensive/defensive missiles, rather than the larger attack and area-defense missiles. (Had the Comet carried standard missiles instead, its complement would have been limited to 9 Firestorm attack missiles and 3 Viper area-defense missiles.) However, the limited missile capacity never proved a liability for the quick and maneuverable Comet.

In the last 18 months of the war, Comet light cruisers were present for every major engagement and provided valuable close-range intelligence on Romulan fleet movements. This timely intelligence allowed the UESN fleets, already superior in speed and firepower, to outmaneuver the Romulan defenders. The best-known example of such service was UES Polaris (CLM-117), whose discovery of an enemy staging area near Cheron allowed the UESN to ambush and destroy the last remnants of the Romulan fleet in August 2160.

As Romulan resistance collapsed in early 2160, the UESN began planning for postwar operations. Accordingly, the initial 50-hull order for Comet was cancelled after 25 were constructed, in favor of building 25 Daedalus-class exploratory cruisers (CLM-127). After the war, the 23 surviving Comet cruisers joined Starfleet, where they continued in service until 2192.

Comet's peacetime service with the Federation Starfleet proved just as successful, if less glamorous. Its small size and high speeds made it ideal for peacetime patrols, both on the borders of the new Federation and along the spacelanes between member worlds. Its light weaponry, which limited Comet to scout and strike roles during the war, were more than sufficient for defending against any threats to Federation security in the postwar era.

Fireball and Rocket continued to serve as testbeds for new propulsion theories and technologies, which helped greatly in the development of the third and fourth generations of M/AM-powered ships, represented by the Conqueror- and Dragon-class heavy cruisers. At the end of their research careers in 2163,Fireball and Rocket joined Starfleet and served as couriers and diplomatic transports until 2193.

Although Comet was a small, lightly armed ship, its influence was enormous. It set the standard for all subsequent front-line starship designs; although starship hulls have evolved with advances in warp field theory, even the newest starships have a distinct familial relationship to Comet, launched over two centuries ago.


UESFireball and the Comet-class light cruiser UESMeteor (CLM-103) have been restored to their wartime service appearances and are on display at the Starfleet Museum.


Commissioned Fireball-class Ships

UES Fireball XL-5
UES Rocket (XL-6)


Fireball-class Specifications

Standard displacement: 39,441 t

  Overall 1 Hull 2 Hull Nacelles
Length [m] 120.44 36.60 56.83 87.19
Beam [m] 59.76 29.57 23.03 9.60
Draft [m] 35.86 29.57 23.03 9.60

Crew complement: 52 (8 officers + 44 crew)
Weapons: none
Embarked craft: 4 light cargo/personnel shuttlecraft
Warp drive: SSWR-IV-0 spherical cavity M/AM reactor with 2 Typhoon A nacelles
Velocity: wf3.2, cruise; wf4.1, supercruise; wf4.4, maximum
Units commissioned: 2


Commissioned Comet-class Ships

UES Comet CLM-102
UES Meteor CLM-103
UES Aurora CLM-104
UES Nova CLM-105
UES Pulsar CLM-106
UES Nebula CLM-107
UES Quasar CLM-108
UES Eclipse CLM-109
UES Equinox CLM-110
UES Solstice CLM-111
UES Corona CLM-112
UES Constellation CLM-113
UES Galaxy CLM-114

UES Flare CLM-115
UES Proxima CLM-116
UES Polaris CLM-117
UES Zodiac CLM-118
UES Mercury CLM-119
UES Venus CLM-120
UES Luna CLM-121
UES Mars CLM-122
UES Jupiter CLM-123
UES Saturn CLM-124
UES Uranus CLM-125
UES Neptune CLM-126


Comet-class Specifications

Standard displacement: 45,826 t

  Overall 1 Hull 2 Hull Nacelles
Length [m] 123.82 39.98 56.83 87.19
Beam [m] 59.76 29.57 23.03 9.60
Draft [m] 35.86 29.57 23.03 9.60

Crew complement: 87 (14 officers + 73 crew)
Weapons: 2 missile launchers with 20 Janus offensive/defensive missiles, 2 Type V laser cannons (fixed mounts)
Embarked craft: 4 light cargo/personnel shuttlecraft
Warp drive: SSWR-IV-A spherical cavity M/AM reactor with 2 Typhoon A-bis nacelles
Velocity: wf3.6, cruise; wf4.3, supercruise; wf4.5, maximum
Units commissioned: 25


Last modified: 04.06.15