Empress Troyhune class Planetoid Monitor

Empress Troyhune class Planetoid Monitor
Large, powerful Planetoid Monitor. The bridge of an Empress Troyhune class Planetoid Monitor also revealing a fighter launch tube.
Type: HMP Planetoid Monitor
Category	BCS
Size	50,000 Tons
Hull Configuration	Planetoid Hull
Streamlining	Unstreamlined Hull
Tech Level	TL–15
Engineering
Computer	Model/9 fib
Jump	J-0
Maneuver	6 G
Armaments
Hardpoints	490
Accommodations
Staterooms	0
Personnel
Crew	64 officers, 341 ratings, 20 pilots
Officers	84
Enlisted	341
High/Mid Passengers	0
Payload
Cargo	9,000 Tons
Fuel tank	0 Tons
Construction
Origin	Third Imperium
Year Operational	1067 IC
End of Service	Still in active service.
Price
Cost	MCr21,795.34247: Standard MCr17,436.27: In Quanity
Architect fee	MCrTimothy B. Brown
Statistics
Quick Ship Profile	HMP-0EU60
Images
Blueprint	Yes
Illustration	Yes
Source
Also see	Defensive Ship - Planetoid Monitor
Canon	Published, fan design
Era	1105
Reference	Fighting Ships 44-45.
Starships are designed with the Classic Traveller format, using High Guard.

The Empress Troyhune class Planetoid Monitor is a massive, defensive warship.

• It is a military ship and a Planetoid Monitor.

Description (Specifications)

The Empress Troyhune is very inexpensive for a vessel of its size; compare the Ghalalk class Heavy Crusier. Saving has resulted from several factors. First, the planetoid hull is very cheap in comparison to a manufactured hull, especially if the cost of armor protection, integral to the planetoid, is included. Second, the cost of a jump drive is immense, and its elimination presented a considerable saving. Yet despite its low cost, the monitor would almost certainly emerge the victor in a battle with the Armored Cruiser, even with a fifth of its tonnage unused. If the monitor were refitted with triple turrets and additional weapons or defenses were mounted in the unused space, at a not very considerable additional expense, it superiority would be even greater. Planetoid-hulled monitors thus have an obvious appeal to planetary navies unconcerned with large scale naval maneuvering.

This design also illustrates some of the advantages possessed by battleriders versus battleships, although the cost advantages are largely eliminated when the cost of the Fleet Tender is included. Still, a squadron of eight 50,000 ton battleriders in a million ton tender approximates in price two Tigress class Dreadnoughts, yet possess much greater firepower and survivability.

Image Repository

1. An Empress Troyhune class Planetoid Monitor revealing a powerful spinal mount underneath its bulky planetoid frame.
   

General Description & Deck Plans

No information yet available.

Basic Ship Characteristics

Following the Imperial Navy and IISS Universal Ship Profile and data, additional information is presented in the format shown here. The small craft factor indicates the number of squadrons (...of ten subcraft) carried on the ship. Tonnage on the universal ship profile is shown in kilotons (...thousands of tons) where necessary.

Basic Ship Characteristics
No.	Category	Remarks
1.	Tonnage / Hull	50,000 tons standard or 50 ktons. 700,000 cubic meters.
2.	Crew	x64 officers. X341 ratings. X20 pilots. Total: 425 crew.
3.	Performance	No jump drive. 6-G. Power Plant-9. 4,500-EP. Agility-6.
4.	Electronics	Model/9 fib computer.
5.	Hardpoints	One spinal mount. No bays. 490 hardpoints. 500 possible hardpoints.
6.	Armament	One meson gun spinal mount (Factor-J). 100 dual laser turrets organized into 20 batteries. 20 dual fusion gun turrets organized into 5 batteries. 90 dual missile turrets organized into 30 batteries.
7.	Defenses	Ninety triple sandcaster turrets organized into thirty batteries. Nuclear damper (Factor-6). Integral hull armor (Factor-6).
8.	Craft	Twenty heavy fighters. One launch tube.
9.	Fuel Treatment	No scoops. Fuel purification plant. Fuel provided by prepositioned fuel caches or by shuttles.
10.	Cost	MCr21,795.34247 standard. MCr17,436.27 in quantity.
11.	Construction Time	30 months singly; 24 months in quantity.
12.	Comments	None.

History & Background (Dossier)

Comments: The Empress Troyhune was originally constructed in orbit above Mora (Spinward Marches 3124) in 1067 for system defense. Budget constraints, its experimental nature, and provision for future ship expansion meant that the ship's tonnage was not fully utilized as constructed. Many turrets were installed as dual rather than triple mounts, and a sizeable fraction (nearly 9,000 tons) of the ship remained unused. Originally, it was envisioned that this 9,000 tons of space would be later committed to additional heavy fighter squadrons and launch tubes. So far, this has not been the case, although the empty interior space has proven useful in other ways.

In 1101, the monitor was declared surplus to the needs of the Mora system and acquired by Rorise (Spinward Marches 3022) for system defense purposes. Transport to its new home presented somewhat of a problem, as neither of the navies of Mora or Rorise possessed a transport ship of sufficient capacity to carry the monitor, and commercial ships of that size are unknown in the Spinward Marches. An appeal to the Imperial Navy brought eventual results, and during the fleet exercise of 1104 the million-ton fleet tender Gorodish carried the Empress Troyhune to Rorise in place of one of its Hadrian class Battle Riders.

The Empress Troyhune is very inexpensive for a vessel of its size when compared to an armored cruiser. Savings have resulted from several factors. First, the planetoid hull is very cheap in comparison to a manufactured hull, especially if the cost of armor protection, integral to the planetoid, is included. Second, the cost of a jump drive is immense, and its elimination presented a considerable saving. Yet despite its low cost, the monitor would almost certainly emerge the victor in a battle with the armored cruiser, even with almost a fifth of its tonnage unused. If the monitor were to be refitted with triple turrets and additional weapons or defenses mounted in the unused space, at a not very considerable additional expense, its superiority would be even greater. Planetoid-hulled monitors thus have an obvious appeal to planetary navies unconcerned with large scale naval maneuvering.

Class Naming Practice/s & Peculiarities

The Empress Troyhune class are named after famous empresses, famed leaders of distinguishment, or nobles of high standing.

The class is known for their often partially finished states of construction. They are often left open to further expansion or development. Armament can vary greatly by system, model, and shipyard.

Selected Variant Types & Classes

Paramilitary Ship - Defensive Ship - Planetoid Monitor:

1. Type HMP class Planetoid Monitor
   1. Defender class Planetoid Monitor
   2. Empress Troyhune class Planetoid Monitor
   3. Guardian class Asteroid Monitor
   4. Hukkert class Monitor
   5. Methuselah class System Defense Monitor
   6. Obsidian class Asteroid Monitor
   7. Peset class Asteroid Monitor
   8. Porton class Asteroid Monitor
   9. Quesha FR-6 class Buffered Asteroid Monitor
   10. Sable class Heavy System Defense Monitor
   11. SH2K Frost G class Medium Asteroid Monitor
   12. SH7K Fromaag class Heavy Asteroid Monitor
   13. Temarn class Asteroid Monitor
   14. Type M2M class Planetoid Battle Station

References & Contributors (Sources)

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This list of sources was used by the Traveller Wiki Editorial Team and individual contributors to compose this article. Copyrighted material is used under license from Far Future Enterprises or by permission of the author. The page history lists all of the contributions.

• Timothy B. Brown. Fighting Ships (Game Designers Workshop, 1981), 44-45. (Classic Traveller Supplement 9)
• Dom Mooney. Power Projection: Fleet (BITS, 2003), TBD.