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Old January 13 2013, 03:04 AM   #2
MasterArminas
Commander
 
Re: Yorktown-class Cruiser (ST: Republic AU)

This is what I have come up with: and I want to know if it is too much, too little (for the period), or if it just doesn't feel right.

YORKTOWN-class Multi-Role Cruiser

Overall Length: 474 meters
Beam: 182 meters
Height: 78 meters
Habitable Decks: 15

Crew Complement: 79 officers, 96 NCOs, and 175 enlisted (350 total)
Marine Complement: 1 officer, 17 NCOs, and 32 enlisted (50 total)
Passenger Accommodations: 100
Nominal Operating Capacity: 500
Emergency Evacuation Capacity: 2,500 (with conversion of cargo space and common areas), plus crew

Warp Drive: LF-43 Mod 2 (2 nacelles)
Standard Cruise Speed: Warp Factor 7
Maximum Cruise Speed: Warp Factor 9
Flank Speed: Warp Factor 9.7
Maximum Attainable FTL Velocity: Warp Factor 9.877

Impulse Drive: FIG-5
Standard Full Impulse Power: 0.25c
Maximum Attainable Sub-light Velocity: o.95c

Anticipated Deployment Duration: 5 years

Embarked Craft (11 total): 1 x Aeroshuttle-class Runabout (ventral dock); 4 x Type-6 Shuttlecraft; 2 x Type-9A Cargo Shuttlecraft; 4 x Type-18 Shuttlepod

Phasers: 6 x Type 10-b Collimated Phaser Arrays (saucer dorsal, saucer ventral, engineering dorsal, engineering ventral, engineering port, engineering starboard)

Torpedoes: 3 x Mk 95 Torpedo Launchers (2 fwd, 1 aft)
Magazine Capacity: 210 total (typical loadout consists of 120 photon torpedoes, 30 quantum torpedoes, and 60 probes)

Notes: The Yorktown-class project was instituted in 2368 as Starfleet began to consider the future need of replacing the existing Excelsior- and Korolev-class cruisers in service. Although design planning had begun in 2368, actual construction did not start until 2370. The chaos of the Dominion War forced Starfleet into reducing the priority of these new ships, slowing construction as resources were devoted instead to existing designs and repairing battle-damaged hulls. Even today, in the aftermath of that War, many on the Federation Council question this design, citing it as too ‘militaristic’ in nature. The leading four units have either entered service or will do so within the next six months, but the remaining eight of the original batch laid down have all had their construction suspended. Designed from the start as rugged and reliable vessels, every piece of equipment on the Yorktowns had been tested in the field by another class of starship and proven effective. Although it is shocking in this day and age, no new technological systems were introduced on this class.

Although slightly larger (and with much greater internal volume) than an Excelsior, the Yorktowns featured a core crew of just 400 officers and men, versus the 650 required aboard the older cruiser. That number included 50 Starfleet Marines, who replace the normal Security Department aboard the Yorktown-class vessels and provide a highly-trained ground force, a need which the Dominion War illuminated. Despite this reduction in crew size, Yorktown proved on her space trials to be a most promising vessel. Her sensor system rivaled that of the Intrepid-class Light Explorer in range and resolution, the deflector shield generators and grid provided protection equal to late-model Galaxy- and Nebula-class starships: while the new ‘regenerative’ shield generators of the Sovereign-class were considered, the design team instead decided to employ only tried and tested equipment. Contrary to pre-War doctrine, the Yorktown-class vessels incorporated ablative armor plating as part of their core design; furthermore, all viewports and bays on the vessel’s outer hull have been fitted with armored hatches which can be closed during battle to eliminate those weak points in ship’s structure.

The LF-43 Mod Two warp engines are proven units that were first fitted to the Akira-class cruiser, but advances in technology and a more powerful warp core has increased their performance dramatically. With these reliable and rugged engines, the Yorktown-class cruisers have performed above and beyond the expectations of Starfleet engineers. Standard cruise speed is a hefty Warp 7 which is also the most fuel-efficient faster-than-light speed. Maximum cruise speed was rated at an incredible Warp 9; although cruising at this velocity consumes far more fuel and decreases the life-expectancy of the warp coils the Yorktowns can maintain this velocity indefinitely. Standard flank speed once again surpassed expectations with a rating of Warp 9.7; this speed can be maintained for a minimum of one hundred and twenty hours before warp core heating forces a speed reduction. Speed trials showed that under maximum power (125% of rated warp-core capacity), the Yorktown was able to achieve a velocity of Warp 9.877 and maintain that speed for as long as ninety minutes.

One major change in Starfleet doctrine is the inclusion of a secondary warp core. Not parts to rebuild the primary core, but a complete secondary (albeit, less powerful) core. The secondary core is housed just forward of the junction of the nacelle pylons and the engineering hull and is normally kept off-line. Should the primary core become damaged or if the crew is forced to eject the primary core, the secondary core can be powered up and brought on-line within minutes. Cruise speed for the secondary core is only Warp 6, with flank speed of Warp 8, and maximum FTL velocity of Warp 9.2. The two cores cannot be active at the same time, however.

Sublight maneuvering is provided by a single FIG-5 impulse engine; whereas most Starfleet vessels carry two impulse engines, there was a concern that the warp nacelles might be damaged by the exhaust wash from a more traditional impulse arrangement. The same engine mounted on the Sovereign-class Heavy Explorer, the FIG-5 provides ample power for the Yorktowns with a maximum relativistic velocity of 0.95c. Standard full impulse power is normally limited to 0.25c to avoid the effects of time dilation. Critics of the design argued that maneuverability would suffer with only a single engine, but the installation of additional RCS thrusters has belied that concern.

Offensive weaponry was considered on par or slightly superior to early model Galaxy-class starships. The Type X-b collimated phaser arrays (the upgraded model used on Galaxy-class refits during the Dominion War) contain the same number of individual emitters as the larger ships, but on the Yorktown are divided among six separate strips, giving superior all-aspect coverage in comparison to the older design. Rather than the original Mk 80 torpedo launchers of the Galaxy-class Explorers, the Yorktowns instead are fitted with three rapid-fire Mk 95 launchers (the launchers carried on the Sovereign-class Explorers). The Mk 95s are capable of launching probes, photon torpedoes, and quantum torpedoes; furthermore each launcher is equipped with a five-tube cylindrical rotating automatic loader that can launch up to one torpedo every half-second; however, once this ready magazine is exhausted the ship requires almost a minute to reload from the magazines. With two Mk 95s mounted forward, a Yorktown can fire ten torpedoes (photon or quantum) in under 2.25 seconds, although it will then take fifty-four seconds to reset the cylinder loading system for another salvo. This reloading system differs from the Galaxy-class in that the Yorktowns are not capable of simultaneously launching five torpedoes from each launcher, and overall magazine capacity is lower (150 torpedoes and 60 probes vs. 250 torpedoes and 150 probes for the Galaxy-class).

Two tractor beam projectors with a rated capacity of 4.5 million tons are fitted to the design as well: one forward and one aft, both of which mounted on the ventral surface of the vessel's engineering hull. The Yorktowns are capable of extending their warp field around and towing (via tractor) a Galaxy-class or smaller ship at velocities of up to Warp 7, although doing so stresses the engines and can be maintained for only ninety-six hours.

Two computer cores are fitted to the design, one in the saucer and the second in the engineering hull. In a move that shocked many engineers, the Yorktowns forgo the use of bio-neural gel-packs, instead relying upon older isolinear optical chips for its sub-processor systems. Originally designed to incorporate the bio-neural gel-packs, the design team (upon reviewing classified reports from USS Voyager in the Delta Quadrant) decided to forgo the new technology until it has fully matured. Many officers within Starfleet questioned the decision to install just two computer cores instead of the traditional three, but doing so saved internal volume, while still maintaining an acceptable amount of redundancy in the event of a core failure.

In another surprising move, the Yorktown design team eliminated all separation systems from this class of Cruiser. Citing the rarity of such systems being used, the engineers instead devoted the volume and mass of these systems (and the additional impulse and warp drives) to other matters. Although capable of operating within an atmosphere, the Yorktowns are unable to safely land on a planetary surface. Fifty escape pods give the Yorktowns the capacity to evacuate all members of the core crew during an emergency; this does not include any passengers, however. The vessels various shuttlecraft do provide ample space for normal (non-evacuation) passenger capacity.

Ten shuttlecraft and shuttlepods are carried in the main shuttle bay astern: four Type 6 shuttlecraft, two Type 9A cargo shuttlecraft, and four Type 18 shuttlepods. While not standard on the Yorktowns, up to two of Starfleet’s larger shuttlecraft (such as the Type 11 or the Argo-class) can be accommodated, with each taking up the space of one Type 9A cargo shuttle and one Type 18 shuttlepod. In addition to the listed shuttles, an Aeroshuttle-class Runabout is carried in a ventral docking station beneath the saucer. This vessel serves as the Captain’s Gig and provides the Yorktown-class Cruisers with a long-ranged subordinate vessel.

Although well armed, the Yorktowns are also equipped to serve as exploration and research vessels. Not quite as capable in that regard as the Nova-, Intrepid-, Luna-, or Sovereign-class vessels, the science and research facilities aboard the Yorktowns are far more spacious and modern than the ones aboard existing Akira-, Excelsior-, and Korolev-class vessels. Combined with their excellent sensor arrays, this capacity to serve as exploration vessels has only increased the potential value of these new cruisers to Starfleet. There are dedicated facilities onboard for Biological Sciences, Computer Sciences, Planetary Sciences, Physics, Social Sciences, and Space Sciences, in addition to four non-dedicated research laboratories. The Medical Department includes beds for up to thirty patients, two surgical suites, and two medical research labs, in addition to a medical replication pharmacy and a quarantine bay. Eighty EVA/Hazardous Environmental Suits are stored in lockers located next to the six airlocks (ten each) and adjacent to the shuttlecraft bay (twenty total).

Four personnel and two cargo transporters are provided, along with two emergency transporters. Cargo space aboard the Yorktowns exceeds that of the Excelsior-class design by 40%, and includes an integral industrial replicator. In addition to a holographic firing range for small arms training, the Yorktowns are outfitted with two Holodecks, along with four gymnasiums, two natatoriums, and a forward observation lounge, plus an arboretum. An Emergency Medical Hologram comes standard, with holo-projectors located throughout the ship in vital areas. Accommodations for the crew are slightly smaller than Starfleet standard (officer accommodations are quite a bit less spacious than Starfleet standard), but are amply furnished with each member of the core crew (and all passengers) given a private compartment that includes a small living/dining space, a food replicator, a desk with a computer workstation terminal, a sleeping area, and a lavatory/washroom.

One intriguing part of the Yorktown design is that the Security and Tactical departments have been separated; indeed, the Security department has been eliminated aboard these ships. Instead, every Yorktown is provided with a detachment of Starfleet Marines (50 officers and men) that handles internal ship security, boarding actions, and away missions. Organized in an overstrength platoon of five 9-man squads, plus a command team of one officer and four Marines, this detachment is sufficient for all but the most challenging of events. The central armory includes sixty Type III Phaser Rifles, two hundred and fifty Type II Phaser Pistols, and two hundred Type I Hand Phasers; plus four Photon Mortars and two hundred grenades. This aspect of the design is one which certain members of the Federation Council vehemently object to, and is one of the main reasons behind the current suspension in construction for the eight incomplete Yorktowns.

Outfitted with fuel and supplies for a voyage of up to five years duration, the Yorktowns are designed to go twenty years between major overhauls/refits, with a projected service life of at least one century as designed.

Ships in Class:
USS Yorktown (NCC-81370; lead-ship of the class)
USS Republic (NCC-81371; ex-USS Shokaku)
USS Saratoga (NCC-81372; under construction, scheduled for launch in 2377)
USS Ark Royal (NCC-81373; under construction, scheduled for launch in 2377)
Plus eight additional ships whose construction has been suspended (between 20% and 80% complete).

Well? What do you think? Does it sound about right?

MA
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