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Starfleet Procurement Policy Draft

Ah okay, I didn't know that. But really, if the "outrageous Okona" would own a shipyard, that would be funny. Just don't expect too much quality from him. :)
 
Bringing the histories up into the current TrekLit "Present".

Crawling Back from the Brink (2382 - 2385)
63 billion dead. The stark brutality of this statistic has shaped Federation and Starfleet economic policy since 2381. Starfleet's personnel losses in the invasion numbered in the millions. The total personnel and ship loss figures surpassed the entirety of Starfleet's losses since its founding in 2161. At a time of unprecedented demand for humanitarian aid and reconstruction assistance, Starfleet faced its greatest labor shortage in its history.

Admiral Edward Jellico resigned shortly after the crisis, succeeded by Admiral Leonard James Akaar. The Akaar Admiralty faced an impossible task. Its priorities included major reconstruction work in Federation space, humanitarian aid to foreign powers, rebuilding Starfleet personnel numbers and Starbase facilities, and resuming exploration missions along the Federation's frontier. The Bacco Administration's decision to maintain the deep space exploration assignments of Luna, Cheyenne, Niagra, and Andromeda class starships caused substantial controversy on the Federation Council. Deep space exploration held significant symbolic importance to the Federation public, but elected officials across the Federation were bombarded by demands for Starfleet support. Polling data on the decision was mixed, with results varying wildly from month to month.

Starfleet's immediate challenge was finding sufficient manpower to rebuild. Labor shortages were acute within Federation space and the trauma of the invasion led to a substantial portion of Starfleet personnel resigning at the end of their enlistment period. The Akaar Admiralty immediately began a program of stop-loss programs for officers and activated reserve clauses for a large number of retired personnel. Age based restrictions on enlistment were relaxed, while training programs were reduced to 3 month basic training for enlisted personnel and 6 months for officer trainees. Existing Starfleet Academy cohorts had their curriculum reduced to three years, effectively serving their senior year in the field. Finally support facility personnel numbers were dramatically downscaled, reduced to 80% of their pre-invasion numbers.

Starship crews were not immune to personnel shuffles. Plans to restore crew complements to pre-Dominion War levels were shelved indefinitely. In some cases crew numbers were reduced through elimination of smallcraft personnel or increased cross-training of enlisted specialists. Most ships were substantially undermanned, particularly in specialist departments. Larger starships were hit hardest; the typical Galaxy, Sovereign, Vesta and Nebula class starship operated at between 90-95% of its establishment in this period. USS Sugihara's experience at Ardana was sadly typical of the costs of reduced crew size. A lack of trained geologists aboard resulted in vital sensor data forecasting an earthquake being overlooked, resulting in the death of 203 Ardanans and 4 Starfleet personnel.

Significant obstacles also stood in the way of rebuilding fleet strength. Sol and Proxima's primary ship building facilities came through the invasion unscathed, but substantial numbers of civilian yards in systems ranging from Aldebaran to Beta Rigel were devastated. Demand for new civilian starships vastly outstripped supply. Further, Starfleet itself had a large number of starships with urgent repair or refit needs. Starfleet facilities were tasked with a dual task of building new shipyard facilities for civilian contractors and restoring Starfleet fleet strength.

Fleet yard commanders interpreted these priorities rather liberally, donating many of their older, smaller facilities in wholesale shipments to their contractors and building brand new Class I facilities with integration facilities and high levels of automation. By the end of the 2381 calendar year, Utopia Planitia alone had doubled its fleet yard capacity while providing nearly 70 new dockyard facilities for Sol System contractors like Baikonur Cosmodome and Copernicus Shipyards. Similar processes played out through the Federation, with an emphasis on building smaller, simpler fabrication facilities.

When Andor and its territories seceded in 2382 they possessed an eighth of Federation dock yard capacity. Substantial numbers of ships under construction were removed from Andorian yards for completion in Proxima and Tellar. With most advanced civilian yards busily producing ships for the private sector, Starfleet began contracting out orders for new hulls to extremely small private yards. Advanced facilities being in short supply, Starfleet began hauling first generation industrial replicators and fabricators out of storage to equip these new operators. Using this antique equipment, series production of Excelsior and Miranda class hulls resumed in small numbers.

Every hull is precious for Starfleet at the present juncture. Hulls once planned for scrapping have been stripped down, refurbished and rebuilt. Surplus depots have been raided for any usable hulls, with substantial upgrades implemented on designs previously slated for phase out. Despite the great challenges facing it, Starfleet remains poised to boldly go forward, a symbol of strength and stability in an uncertain galaxy.
 
A side bar trying to explain hull geometry, time barriers, and nacelle numbers.

Geometric Complexity: Warp Nacelle Combinations
Once a starship design team has chosen the specific model of nacelle and general hull proportions based on mission parameters, the next step in design involves choosing the number and orientation of nacelles along with precise hull geometry. Both subspace and normal space physics have conflicting impacts on performance that designers must balance.

Basic structural efficiency favors spherical hull forms, maximizing internal volume while minimizing surface area. However, a true spheroid introduces substantial subspace field distortion, resulting in a phenomenon known as "subspace drag". The drag occurs as the geometric effect of the hull shape on subspace fields force overlapping warp fields to compress. The compression then distorts the field geometry at the trailing edges of the field, disrupting the coherence of the warp field and reducing its overall effect on the hull within.

The subspace drag phenomenon is more pronounced at higher warp factors and field intensities. At a high enough power level, the distortions in the warp field are no longer concentrated on field's edges and instead begin to impact segments of the propulsive bubble. Some parts of the space frame become exposed to normal space physics effects as these "gaps" in the field increase in number. Eventually hull segments begin to dissociate as relativistic effects begin impacting hull materials caught in the compression effect.

The dissociation effect occured at different field intensities depending on hull configuration, but was almost universal at fields past 400 cochrane intensity in 22nd and early 23rd century engine configurations. Originally labelled the Time Dilation Barrier due to the fact that relativistic effects were responsible for asynchronus component dissociation by the 2180s it began to be referred to simply as the "time barrier". It would not be until the 2230s that universal application of duotronic processor technology allowed field control software to compensate for subspace compression effects, effectively breaking the time barrier.

Although time dilation dissociation is no longer a factor with modern nacelle control software and coil designs, subspace drag remains a consideration in ship design. High drag coefficients begin to eat into the effective field strength of a warp field, leading to reduced propulsive performance. Starfleet's favored compromise between lower subspace drag coefficient and structural efficiency remains the saucer shaped primary hull. Greater understanding of subspace field dynamics since the 2340s has led to substantial changes from the basic truncated cylinder popularized in the 23rd century to more ellipsoid hulls.

Warp nacelle orientation and number have several distinct effects on starship performance. A typical Starfleet vessel dedicates roughly 15-30% of its total mass on warp coil. Even modern subspace field coil based impulse engines and RCS assemblies face challenges from the weight distribution of large nacelle structures. Nacelle placement makes an enormous difference in sublight performance. Designs with nacelles closer to the centerline make more maneuverable sublight combatants.

The opposite is true for warp maneuverability. The asymmetry between subspace fields projected by warp nacelles is the primary driver of warp maneverability. The further apart the nacelles, the more flexibility a ship has in adjusting its field intensity to maneuver at warp speeds. Most Starfleet vessels attempt to balance the positioning of warp nacelles to combine acceptable sublight performance with effective warp maneuverability.

The number of warp nacelles impacts the overall mass of a starship and the efficiency of its drive components. A single nacelle greatly decreases the weight distribution problems at sublight velocities and generally helps produce the "cleanest" warp field in terms of hull geometry's influence. The result is a lower subspace drag coefficient and smoother acceleration between peak transitions. Single nacelle configurations however suffer from a crippling lack of maneuverability at warp, and a difficulty with producing more than a small number of field layers.

Horizontal paired nacelles offer the greatest trade-off between warp maneuverability, general propulsive efficiency, and peak performance. Ships with horizontal nacelle pairs tend to have substantially better yaw performance, a trait often making three-dimensional tactical maneuvers at warp more difficult. This partly explains why Starfleet fleet deployments tend to feature formations with ships oriented toward horizontal rather than vertical station keeping.

Tri-nacelle designs are generally an attempt to compensate for hull forms with greater volume to surface area ratios. The third nacelle helps provide a reinforcing field layer to reduce the impacts of subspace drag. Unlike in single, dual or quad nacelle designs, the third nacelle in these configurations are not used as a main propulsion unit. This often leaves them underutilized and overequipped for such limited use. (It has also spawned the term "third nacelle" to mean an awkward tag along to a group who serves little purpose)

Finally, quad nacelle configurations offer a design flexibility at the cost of increased complexity. Quad-projected warp field geometry requires substantially more tuning to negate the impacts of subspace drag. Even the standard compression effects from drag are much larger, and a ship equipped with 4 nacelles is required to substantially reduce the amount of hull space located near or behind its warp coils. Both the Constellation and Cheyenne class starships demonstrate this principle by omitting or substantially downsizing their secondary hull. However, quad nacelle configurations offer superior warp maneuverability, particularly in unorthodox pitch and roll maneuvers, making the ships well suited to eluding pursuit or exploring regions of space "off-axis" on the galactic plane.

Coil longevity and cruise endurance are both increased in quad-nacelle designs. Lower field intensities can be used from each nacelle to sustain a given speed, allowing the use of fusion power sources to sustain integer velocities or reduce the strain of high energy plasma use on coil elements. In addition warp field manipulation software can operate the nacelles in pairs, idling the remaining pair to reduce coil strain. The cost for this increased superluminal flexibility is significantly greater ship mass. The heavier ship requires much more powerful impulse drive units to achieve acceptable sublight maneuverability.
 
A long, rambly side-bar focusing on the evolution of Miranda-class configurations.

Snapshots of an Evolving Starship
Snapshots in the lifespan of a starship class provide a fascinating glimpse into the evolution of Starfleet technology and mission requirements. The Mirandaclass starships in particular provide a century long progression in multiple hull configurations. Changes in mission payload and propulsion technologies are quite substantial between generations. The following section examines an archtypical example of the class from 2280 to 2380. In some cases the examples are the same ship in different stages of her career.

For the sake of comparative ease, all measurements, performance specifications and classifications use Starfleet standard units of the 24th century. The anachronism of applying Revised Cochrane Scale velocities for a ship from 2280 is respectfully acknowledged, and duly ignored

2280 - 2285
In the 2280s the Miranda-class represented Starfleet's state of the art mainline cruiser. Sometimes classified a heavy frigate for political reasons, the class had a formidable mixture of scientific and tactical capabilities well suited to an era characterized by tensions with the Klingon and Romulan Empires.

USS Reliant NCC-1864
Famous for her involvement in the Mutara Nebula Incident, Reliant was a typical example of the Miranda class circa 2280, fitted with modern computer, propulsion and weapons systems. She featured an extensive internal compression hull skeleton constructed of an alloy of duranium and trititanium. In contrast to later ships of her class, she weighed in at 675,000 metric tons and had a usable payload volume of 125,000 m³.
  • Basic Specifications
    • Builder: 40 Eridani-A, Yoyodyne Systems Engineering
    • Classification: Heavy Frigate
    • Hull Configuration: Duranium/Trititanium Alloy Endoskeletal Hull, Duranium Transverse Bulkhead Compartments, Duranium Outer Hull
    • Complement: 32 Officers, 298 Enlisted, 22 Mission Specialists
    • Cruising Speed: Warp 4 for 24 Months
    • Maximum Cruising Speed: Warp 6 for 2 Months
    • Maximum Rated Speed: Warp 8 for 12 Hours
    • Mission Endurance: 24 Months
  • Propulsion Systems
    • Primary Powerplant: Leeding Warp Systems CF-75 Model Dilithium Energized Swirl Matter-Antimatter Reactor Core
    • Warp Propulsion: 2x Leeding LN-64 Warp Nacelles, Rated at 1,300 Cochranes
    • Secondary Powerplant: 2x Inertial Confinement Fusion Generators
    • Sublight Propulsion: 1x Dual-IMRF Equipped Impulse Propulsion Drive Rated at 200 Milicochranes
  • Tactical Systems
    • Energy Armament: 4x Type-VII Equivalent Phaser Cannon (2x Fore, 2x Aft), 6x Dual Type-VI Equivalent Phaser Banks
    • Projectile Armament: 4x Mk.6 Photon Torpedo Launchers (2x Fore, 2x Aft)
    • Deflector Systems: Two-layer EM/Graviton Forcefield Shield System
  • Scientific Equipment
    • Laboratory Facilities: 4 General Purpose Laboratory Facilities, 1 Planetary Survey Laboratory, 1 Astrophysics/Navigation Laboratory, 1 Special Purpose Configurable Laboratory
    • Primary Computer Systems: 2x Duotronic Computer Cores
    • Sensor Capabilities: 12x Mk.V Primary Sensor Palettes (Active Optical, EM, Gravitic and Subspace Sensors), 1x Navigation Sensor Suite
  • Auxiliary Craft
    • Warp Capable Smallcraft: 2 Low-warp Courier Shuttles
    • Sublight Smallcraft: 8 Shuttlepods/Travel Pods
    • Emergency Smallcraft: 150 Triple-Occupancy Lifepods, 2 20-person Lifeboats
    • Smallcraft Facilities: 1 Standard Maintenance Facility

2295 - 2310
With the inaugural decennial plan in 2295, Starfleet put into production and updated version of the reliable Miranda-class starship. The first production batch initiated at Starfleet's Tranquility Base Fleet Yards were a conservative revision of the class. Unlike later designs they did not fully abolish internal stress frames, keeping most of the major transverse bulkheads. With most of the heavy combat roles now filled by Excelsior and Constellation class starships, the Miranda was classified as a cruiser with an emphasis on multi-role missions in Federation territory.

USS Himera NCC-4122
Built at Tranquility Base in 2297, Himera falls under the first production run of post-Khitomer Miranda-class starships. She featured minimal upgrades from her predecessor with a hybrid hull construction. The resultant savings in mass and volume were less than anticipated, resulting in a ship with an operational mass of 650,000 metric tons and 130,000 m³. The result was a modest improvement in habitability, particularly when combined with reduced crew numbers, but nowhere near the amount expected by Starfleet logistics planners.

This first production run was considered somewhat over-built and cramped in later years, particularly compared to newer versions of the basic hull frame. They were sturdy ships that found consistent employment due to their rugged construction. In later years Starfleet made a habit of employing these vessels in lieu of more valuable ships, and Himera was retired in 2320 after an uneventful career. She was sold for scrap in 2340 after SCE surveys found her unfit for rebuilding.
  • Basic Specifications
    • Builder: Fleet Yard Operations, Tranqulity Base, Luna
    • Classification: Multipurpose Cruiser
    • Hull Configuration: Hybrid SIF-integrated Duranium/Titanium Truss and Beam Construction, Tritanium Transverse Bulkheads, Duranium Outer Hull
    • Complement: 28 Officers, 232 Enlisted/Specialists
    • Cruising Speed: Warp 4 for 24 Months
    • Maximum Cruising Speed: Warp 5 for 3 Months
    • Maximum Rated Speed: Warp 8.2 for 18 Hours
    • Mission Endurance: 24 Months
  • Propulsion Systems
    • Primary Powerplant: Shuvinaaljis CXF-90 Matter-Antimatter Reactor Core
    • Warp Propulsion: 2x Leeding LN-64B Mod.1 Warp Nacelles Rated at 1,500 Cochranes
    • Secondary Powerplant: 2x Inertial Containment Fusion Generators
    • Sublight Propulsion: 1x Dual-IMRF Equipped Impulse Propulsion Drive Rated at 215 Milicochranes
  • Tactical Systems
    • Energy Armament: 4x Type-VII Equivalent Phaser Cannon (2x Fore, 2x Aft), 6x Dual Type-VI Equivalent Phaser Banks
    • Projectile Armament: 4x Mk.6 Photon Torpedo Launchers (2x Fore, 2x Aft)
    • Deflector Systems: Two-layer EM/Graviton Forcefield Shield System
  • Scientific Equipment
    • Laboratory Facilities: 4 General Purpose Laboratory Facilities, 1 Planetary Survey Laboratory, 1 Astrophysics/Navigation Laboratory, 1 Special Purpose Configurable Laboratory
    • Primary Computer Systems: 2x Duotronic Computer Cores
    • Sensor Capabilities: 12x Mk.VI Primary Sensor Palettes (Active Optical, EM, Gravitic and Subspace Sensors), 1x Navigation Sensor Suite
  • Auxiliary Craft
    • Warp Capable Smallcraft: 2 Low-warp Courier Shuttles
    • Sublight Smallcraft: 8 Shuttlepods/Travel Pods
    • Emergency Smallcraft: 150 Triple-Occupancy Lifepods, 2 20-person Lifeboats
    • Smallcraft Facilities: 1 Standard Maintenance Facility

2315 - 2325
Operational experience with trussed frame designs in the late 23rd and early 24th century gave Starfleet engineers and surveyors greater confidence in the soundness of the basic concept. The 2315 Decennial Plan took this into account when ordering new ship production. In particular Starfleet was eager to move more basic hull production to civilian yards. Mirandas were considered ideal learning vehicles for civilian yards still uneasy with trussed frame construction. Most Starfleet hulls conducted in the 2310s were Miranda-class frames.

USS Carthage NCC-7739
Built at Salazaar's Centauri Spaceworks facility, Carthage was among the first of the "third generation" Mirandas. Built with a full trussed frame configuration, she was a svelte 550,000 metric tons and had a usable payload volume of 145,000 m³. Her LN-64N warp nacelles used coils derived from Excelsior and Apollo class technology providing a welcome boost to speed and overall range.

Internally Carthage also represented a significant advance. Hybrid quadritronic/duotronic computer cores provided sufficient processing power for the installation of general use replicators, providing significant increase in mission endurance. Her sensor suites were two generations more advanced than in the previous batch, matching the configuration of the 2310 Excelsior upgrades in capability.

Carthage served with distinction under the command of Vance Haden along the Federation's Alpha Quadrant Frontier. She served as mediator during the Betreka Nebula Incident, and later in the sporadic border conflicts of the 2340s. Among Haden's senior staff who later found renown were Rachel Garett of the Enterprise-C and Wai-Lin Li of Achilles. Carthage remains in service over half a century after her commissioning and is slated to be upgraded to Medea's configuration by the end of 2385.
  • Basic Specifications
    • Builder: Centauri Spaceworks, Salazaar Shipyards
    • Classification: Cruiser/Survey Cruiser
    • Hull Configuration: SIF-integrated Duranium/Titanium Truss and Beam Construction
    • Complement: 32 Officers, 132 Enlisted/Specialists
    • Cruising Speed: Warp 5 for 24 Months
    • Maximum Cruising Speed: Warp 7 for 2 Months
    • Maximum Rated Speed: Warp 9 for 8 Hours
    • Mission Endurance: 30 Months
  • Propulsion Systems
    • Primary Powerplant: Shuvinaaljis CF-15N Matter-Antimatter Reactor Core
    • Warp Propulsion: 2x Leeding LN-64N Warp Nacelles Rated at 1,750 Cochranes
    • Secondary Powerplant: 2x Inertial Containment Fusion Generators
    • Sublight Propulsion: 1x Dual-IMRF Equipped Impulse Propulsion Drive Rated at 215 Milicochranes
  • Tactical Systems
    • Energy Armament: 4x Type-VII Equivalent Phaser Cannon (2x Fore, 2x Aft), 6x Dual Type-VI Equivalent Phaser Banks
    • Projectile Armament: 4x Mk.6 Photon Torpedo Launchers (2x Fore, 2x Aft)
    • Deflector Systems: FSS-1 Subspace Graviton Forcefield System
  • Scientific Equipment
    • Laboratory Facilities: 2 General Purpose Laboraties, 2 Multi-configuration Specialty Laboratories, Astronavigation Charting Laboratory
    • Primary Computer Systems: 2 Quadritronic-Duotronic Hybrid Computer Cores
    • Sensor Capabilities: 20x Mk.VII Primary Standard Sensor Palettes (Active Optical, EM, Gravitic and Subspace Sensors), 1 Ventral Sensor Bay with Long-range Survey Equipment
  • Auxiliary Craft
    • Warp Capable Smallcraft: 2 Low-warp Courier Shuttles
    • Sublight Smallcraft: 8 Shuttlepods/Travel Pods
    • Emergency Smallcraft: 80 Triple-Occupancy Lifepods, 2 20-person Lifeboats
    • Smallcraft Facilities: 1 Standard Maintenance Facility

2325 - 2340
The advent of widespread industrial replication in the 2330s dramatically changed the Federation's economy. Widespread displacements occured as the terms of interstellar trade changed substantially in a short period of time. The Federation Commerce Department partnered with Starfleet and the Merchant Marine to assist struggling planetary economies with adoption of replicator economics. Starfleet vessels and SCE teams were instrumental in assisting these endeavors, providing rapid transport and substantial technical knowledge to worlds in need of expertise. Miranda-class variants were at the forefront of this effort, with many hulls being rapidly converted as industrial support ships.

USS Proserpine NCC-21172
Originally completed as a reserve hull in 2318, Proserpine was activated and completed in 2332 to the support transport configuration first tried with USS Lantree (NCC-1837). As a support vessel, Proserpine had a small complement of 52 with substantial cargo room and guest quarters for Commerce Department specialists. Warp and impulse propulsion were tuned primarily for heavy hauling duties, with an emphasis on fuel economy and cruise economy at full weight. Overall mass of the spaceframe was reduced to a mere 500,000 tons, and she contained 80,000 m³ of ccargo space. Approximately half of this space was typically filled with industrial replication equipment for infrastructure construction.

Proserpine was a highly successful support transport, providing industrial conversions and replicator deployment for over two dozen star systems. For Proserpine's later career, consult the later entry.
  • Basic Specifications
    • Builder: Salazaar Shipyards
    • Classification: Support Transport
    • Hull Configuration: SIF-integrated Duranium/Titanium Truss and Beam Construction
    • Complement: 8 Officers, 44 Enlisted/Specialists; 40-80 FCD Replicator Integration Economics Specialists
    • Cruising Speed: Warp 6 for 12 Months
    • Maximum Cruising Speed: Warp 7 for 2 Months
    • Maximum Rated Speed: Warp 8.3 for 6 Hours
    • Mission Endurance: 12 Months
  • Propulsion Systems
    • Primary Powerplant: Cochrane Warp Dynamics T4CW-1 Class 4 Transport Matter-Antimatter Reactor Core
    • Warp Propulsion: 2x LN-64H2 Cargo Hauling Warp Nacelles, Rated at 1,250 Cochranes
    • Secondary Powerplant: 4x Inertial Containment Fusion Generators
    • Sublight Propulsion: 2x IMRF Equipped Heavy Duty Impulse Engines, Rated at 350 Milicochranes
  • Tactical Systems
    • Energy Armament: 6x Type-V Equivalent Phaser Banks
    • Projectile Armament: 1x Mk.17 Light Torpedo/Probe Launcher
    • Deflector Systems: FST-12 Class 3 Graviton Forcefield System
  • Scientific Equipment
    • Laboratory Facilities: 1 Industrial Fabrication/Replication Laboratory, 1 Planetary Survey Laboratory
    • Primary Computer Systems: 2 Quadritronic Subspace Accelerated Computer Cores, Rated at 1,250 Milicochranes
    • Sensor Capabilities: 20x Mk.VII Primary Standard Sensor Palettes (Active Optical, EM, Gravitic and Subspace Sensors)
  • Auxiliary Craft
    • Warp Capable Smallcraft: 2 Low-warp Courier Shuttles
    • Sublight Smallcraft: 8-16 Cargo Carriers/Work Pods
    • Emergency Smallcraft: 50 Triple-Occupancy Lifepods, 2 20-person Lifeboats
    • Smallcraft Facilities: 1 High-Capacity Maintenance Bay with Class II Industrial Replicator

2340 - 2350
The mass activation of reserve hulls in the 2340s resulted in numerous novel variations of Miranda and Excelsior hull configurations. The large number of new and reserve hulls built to smaller designs during this period gave Starfleet ample opportunity to experiment. Most starships during this period had some degree of payload customization, configurations being customized by individual yard engineers to try different combinations of capabilities.

USS Antares NCC-9844
Part of the reserve hull program, Antares was originally built by Salazaar Shipyards in the 2320s before being fitted out for service in 2345. Like the Proserpine in the previous decade, Antares was fitted out to fill a particular niche. The niche in the 2340s was for a picket cruiser capable of serving as either a scout or surveyor on the Alpha Quadrant frontier. She was the first of the Miranda hull designs to be fitted with a modern isolinear computer core, allowing for high capacity sensor and electronic warfare equipment to be installed in lieu of a roll bar.

Compared to the somewhat cramped ships fitted out in the first half of the 2340s, Antares retained the habitability improvements first made on the Carthage generation of Mirandas. Her warp nacelles were changed to the light weight, high speed LN-64SL. Although mission endurance was reduced compared to existing Miranda variants, she proved to be more capable at the advanced picket role. Antares herself remains in service, serving as the picket leader for Starbase 375's attached squadron.
  • Basic Specifications
    • Builder: Centauri Space Works, Salazaar Shipyards
    • Classification: Scout Cruiser
    • Hull Configuration: SIF-integrated Duranium/Titanium Truss and Beam Construction
    • Complement: 34 Officers, 112 Enlisted/Specialists
    • Cruising Speed: Warp 6 for 12 Months
    • Maximum Cruising Speed: Warp 8 for 2 Weeks
    • Maximum Rated Speed: Warp 9.1 for 20 Hours
    • Mission Endurance: 12 Months
  • Propulsion Systems
    • Primary Powerplant: Cochrane Warp Dynamics C4C2 Class 4 Matter/Antimatter Reactor Core
    • Warp Propulsion: 2x Leeding LN-64SL Nacelles Rated at 2,000 Cochranes
    • Secondary Powerplant: 2x Mk.IX Inertial Confinement Fusion Generators
    • Sublight Propulsion: 2x IMRF Equipped 250 Milicochrane Impulse Engines
  • Tactical Systems
    • Energy Armament: 2x Type VIII Phaser Emitters, 2x Type VII Phaser Arrays with 6 Emitters Each
    • Projectile Armament: 1x Mk.9 Dual Fire Photon Torpedo Launcher
    • Deflector Systems: FSS-2 Subspace Graviton Forcefield System
  • Scientific Equipment
    • Laboratory Facilities: 6 General Purpose Planetary Research Laboratories, 2x Specialist Survey Laboratories
    • Primary Computer Systems: 1 Primary Isolinear Subspace Accelerated Computer Core, Rated at 3,150 Milicochranes
    • Sensor Capabilities: 1x Electronic Warfare Pod (Active High Resolution Full Spectrum Sensors, Subspace Transmission Jammer, High Capacity Subspace Communications Amplifier), 30x Primary Standard Sensor Palettes (Active Optical, EM, Gravitic and Subspace Sensors, Passive Chronometric Sensors)
  • Auxiliary Craft
    • Warp Capable Smallcraft: 2 Low-warp Courier Shuttles
    • Sublight Smallcraft: 8-16 Cargo Carriers/Work Pods
    • Emergency Smallcraft: 50 Triple-Occupancy Lifepods, 2 20-person Lifeboats
    • Smallcraft Facilities: 1 High-Capacity Maintenance Bay with Class II Industrial Replicator

2350 - 2370
Miranda class hulls remained in extensive use through the middle decades of the 24th century. As newer more combat focused designs replaced them in frontline roles, more support oriented refits were conducted on existing hulls along with their major refits. In particular the introduction of the Sabre class freed Miranda-class ships from border patrol roles.

USS Saratoga NCC-31191
Famous as one of the combatants lost at Wolf 359, Saratoga is a common example of a Miranda class configuration of the 2350s and 2360s. She is a fully modernized example of the class, fitted with new equipment ranging from isolinear computers to array based phaser prefire chambers. Despite the removal of the torpedo module and phaser emitters normally carried on the roll bar structure, Saratoga had similar tactical capabilities to 2330s vintage Miranda class ships, while substantially expanding her scientific potential.

Saratoga herself was fitted out at Earth Station McKinley in 2352 as the first example of her configuration. The success of the configuration resulted in follow-up orders, including Portia and Nerissa.
  • Basic Specifications
    • Builder: Earth Station McKinley
    • Classification: Light Cruiser/Surveyor
    • Hull Configuration: SIF-integrated Duranium/Trititanium Truss and Beam Construction
    • Complement: 22 Officers, 48 Enlisted/Specialists; 10-15 Civilian
    • Cruising Speed: Warp 6 for 18 Months
    • Maximum Cruising Speed: Warp 7 for 2 Months
    • Maximum Rated Speed: Warp 9 for 20 Hours
    • Mission Endurance: 18 Months
  • Propulsion Systems
    • Primary Powerplant: Cochrane Warp Dynamics C5C2 Class 5 Matter/Antimatter Reactor Core
    • Warp Propulsion: 2x Leeding LN-64FN3 Nacelles Rated at 2,000 Cochranes
    • Secondary Powerplant: 2x Mk.IX Inertial Confinement Fusion Generators
    • Sublight Propulsion: 2x IMRF Equipped 250 Milicochrane Impulse Engines
  • Tactical Systems
    • Energy Armament: 1x Type IX Phaser Emitter, 2x Type VII Phaser Arrays with 6 Emitters Each
    • Projectile Armament: 1x Mk.12 Triple Fire Photon Torpedo Launcher
    • Deflector Systems: FSS-3 Subspace Graviton Forcefield System
  • Scientific Equipment
    • Laboratory Facilities: 8 General Purpose Planetary Research Laboratories, 2x Specialist Survey Laboratories
    • Primary Computer Systems: 1 Primary Isolinear Subspace Accelerated Computer Core, Rated at 3,150 Milicochranes
    • Sensor Capabilities: 2x Outboard Enhanced Sensor Pods (Active High Resolution Full Spectrum Sensors), 30x Primary Standard Sensor Palettes (Active Optical, EM, Gravitic and Subspace Sensors, Passive Chronometric Sensors)
  • Auxiliary Craft
    • Warp Capable Smallcraft: 2x Type 6 Shuttles
    • Sublight Smallcraft: 8x Type 15A Shuttlepods
    • Emergency Smallcraft: 40x ASRV, 2x High Capacity Warp-Capable Lifeboats
    • Smallcraft Facilities: 1 Standard Maintenance Bay with Class 2B Industrial Replicator

USS Proserpine NCC-21172
The extensive refit of Proserpine shows the versatility of trussed frame ships. Previously configured as a support transport, Proserpine was fitted as a cruiser after her 20 year refit in 2352. She was provided a new model of roll bar equipped with a driver-coil equipped impulse engine, 2 dual fire photon torpedo launchers and enhanced targeting suite. Other changes included nacelle coils being replaced to bring her to LN-64FN3 standard, the fitting of more general purpose scientific facitilies, and the installation of phaser arrays in her primary hull.

Under this configuration, Proserpine was assigned to the Federation 9th Fleet. She was present at the McAllistair Nebula Crisis and later participated in the Typhon Sector Battle during the Borg Invasion of 2373. She was later lost in the Federation counter offensive into the Archanis Sector, protecting USS Rutledge from a ramming attempt by a K'tinga class cruiser.
  • Basic Specifications
    • Builder: Salazaar Shipyards
    • Classification: Light Cruiser
    • Hull Configuration: SIF-integrated Duranium/Titanium Truss and Beam Construction
    • Complement: 20 Officers, 82 Enlisted/Specialists
    • Cruising Speed: Warp 6 for 18 Months
    • Maximum Cruising Speed: Warp 7 for 2 Months
    • Maximum Rated Speed: Warp 9 for 20 Hours
    • Mission Endurance: 18 Months
  • Propulsion Systems
    • Primary Powerplant: Cochrane Warp Dynamics C5C2 Class 5 Matter/Antimatter Reactor Core
    • Warp Propulsion: 2x Leeding LN-64FN3 Nacelles Rated at 2,000 Cochranes
    • Secondary Powerplant: 2x Mk.IX Inertial Confinement Fusion Generators
    • Sublight Propulsion: 2x IMRF Equipped 250 Milicochrane Impulse Engines, 1 Subspace Driver Coil Equipped Impulse Engine Rated at 450 Milicochranes
  • Tactical Systems
    • Energy Armament: 2x Type VIII Phaser Emitters, 2x Type VII Phaser Arrays with 6 Emitters Each
    • Projectile Armament: 2x Mk.18 Dual Fire Photon Torpedo Launcher
    • Deflector Systems: FSS-3 Subspace Graviton Forcefield System
  • Scientific Equipment
    • Laboratory Facilities: 8 General Purpose Planetary Research Laboratories, 2x Specialist Survey Laboratories
    • Primary Computer Systems: 1 Primary Isolinear Subspace Accelerated Computer Core, Rated at 3,150 Milicochranes
    • Sensor Capabilities: 2x Outboard Enhanced Sensor Pods (Active High Resolution Full Spectrum Sensors), 30x Primary Standard Sensor Palettes (Active Optical, EM, Gravitic and Subspace Sensors, Passive Chronometric Sensors)
  • Auxiliary Craft
    • Warp Capable Smallcraft: 2x Type 6 Shuttles
    • Sublight Smallcraft: 8x Type 15A Shuttlepods
    • Emergency Smallcraft: 40x ASRV, 2x High Capacity Warp-Capable Escape Pods
    • Smallcraft Facilities: 1 Standard Maintenance Bay with Class 2B Industrial Replicator

2370 - 2380
The mobilization efforts of the late 2360s included experimental upgrades to existing ship designs with technology developed after first contact with the Borg. Many of these upgrades would later be applied to ships during the Dominion War.

USS Samson
Refitted in 2371, Samson was a test-bed to integrate the results of the Defiant, and Intrepid class development technologies to older hull frames. Her roll bar phaser hardpoitns were replaced by pulse phasers originally developed for the Defiant class, while she was refitted with deflector shield generators first employed aboard Intrepid. Computer systems were also up to Intrepid standards, featuring dual isolinear computer cores backed with bioneural circuitry based networks and secondary coprocessors. Overall she was a substantial upgrade that required a 6 month lay-over to complete.

For integration testing she was placed under the command of veteran officer Captain Roger Adrian and conducted war games with the Sovereign class Enterprise undergoing final integration testing of her own. The results of the war games were inconclusive on the upgrade's capabilities, as soon after the games Samson was lost with all hands as a result of Dominion sabotage. As a result of her loss modernization efforts of the remaining Miranda class ships of similar configuration were put on hold, leaving a large number unmodernized at the start of the Dominion War.
  • Basic Specifications
    • Builder: ASDB Integration Facilities, Utopia Planitia
    • Classification: Cruiser
    • Hull Configuration: SIF-integrated Duranium/Titanium Truss and Beam Construction
    • Complement: 38 Officers, 182 Enlisted/Specialists
    • Cruising Speed: Warp 6 for 24 Months
    • Maximum Cruising Speed: Warp 7 for 3 Months
    • Maximum Rated Speed: Warp 9.2 for 8 Hours
    • Mission Endurance: 18 Months
  • Propulsion Systems
    • Primary Powerplant: Shuvinaaljis C6S-2 Mod.2 Class 6 Matter-Antimatter Reactor Core
    • Warp Propulsion: 2x Leeding LN-64FN5 Warp Nacelles, Rated at 2,200 Cochranes
    • Secondary Powerplant: 2x Three Chamber Impulse Reactor Networks (6 total IRCs)
    • Sublight Propulsion: 2x Subspace Field Coil Impulse Engines, Rated at 600 Milicochranes
  • Tactical Systems
    • Energy Armament: 2x Type VIIP Pulse-Phaser Cannons, 2x Type VII 180 Segment Phaser Arrays
    • Projectile Armament: 2x Quad-fire Mk.35 Torpedo Launchers
    • Deflector Systems: FSS-5 Reinforced Subspace Graviton Forcefield System
  • Scientific Equipment
    • Laboratory Facilities: 2 General Purpose Laboraties, 1 Multi-configuration Specialty Laboratory, 1 Holographic Experimentation Laboratory
    • Primary Computer Systems: 1 Primary Isolinear Subspace Accelerated Computer Core, Rated at 3,250 Milicochranes
    • Sensor Capabilities: 30x Primary Standard Sensor Palettes (Active Optical, EM, Gravitic and Subspace Sensors, Passive Chronometric Sensors), 1 Ventral Sensor Bay with Long-range Survey Equipment
  • Auxiliary Craft
    • Warp Capable Smallcraft: 4x Type-6 Shuttles
    • Sublight Smallcraft: 3x Type 16 Shuttlepods
    • Emergency Smallcraft: 52x ASRV Escape Pods
    • Smallcraft Facilities: 1 Primary Maintenance Bay, Equipped with Class 2B Industrial Replicator

2380 - 2385
The aftermath of the Borg Invasion brought the reactivation of first and second generation industrial replication and fabrication facilities. With their limited flexibility, Starfleet chose to procure updated frames to outfit with new technology to bring fleet strength numbers back to pre-invasion levels. The result is a modern generation of older starship designs externally similar, but substantially more capable than their predecessors.

USS Medea NCC-81778
Construction of Medea was authorized on Stardate 60783.2 as part of a 8 ship contract given to the newly established Alonis Prime Space Systems. Medea used frame templates taken from the 2330 revision of the Miranda, combined with tritanium composite materials pioneered on the Merian-class starship. Changes included significant structural strength improvements along the inner saucer hull, allowing a full emitter array for her 180 segment phaser array, and a 4.5% reduction in hull mass. The reduced frame load allowed an additional 3% additional payload volume compared to the baseline Miranda configuration.

The Leeding LN-64AL4 Warp Nacelles, while using the classic cowlings of the LN-64 were internally based on the Merian's LF-51 coils. The V6S-3 class 6 warp core powering the latest Sabre-class starship was optimized for cruiser mission endurance and payloads. A pair of standard Mk. XII fusion reactor networks and two 750 milicochrane field coil based impulse engines round out Medea's propulsion system.

Overall the ship represents a high endurance, medium capability starship suited for extended deployment in Federation territory. Medea and her sister Dido are currently assigned to sector patrol and surveying duties near Starbase 197.
  • Basic Specifications
    • Builder: Alonis Prime Space Systems
    • Classification: Light Cruiser
    • Hull Configuration: SIF-integrated Tritanium/Ceramic Nanopolymer Truss and Beam Construction
    • Complement: 16 Officers, 54 Enlisted/Specialists
    • Cruising Speed: Warp 6 for 30 months
    • Maximum Cruising Speed: Warp 7 for 2 months
    • Maximum Rated Speed: Warp 9.4 for 6 hours
    • Mission Endurance: 30 months
  • Propulsion Systems
    • Primary Powerplant: Shuvinaaljis C6S-2A Mod.3 Class 6 Matter-Antimatter Reactor Core
    • Warp Propulsion: 2x Leeding LN-64AL4 Mod.5 Warp Nacelles, Rated at 2,500 Cochranes
    • Secondary Powerplant: 2x Three Chamber Impulse Reactor Networks (6 total IRCs)
    • Sublight Propulsion: 2x Subspace Field Coil Impulse Engines, Rated at 750 Milicochranes
  • Tactical Systems
    • Energy Armament: 2x Type VIIP Pulse-Phaser Cannons, 2x Type VII 180 Segment Phaser Arrays
    • Projectile Armament: 2x Quad-fire Mk.35 Torpedo Launchers
    • Deflector Systems: FSS-7A Regenerative Subspace Graviton Forcefield System
  • Scientific Equipment
    • Laboratory Facilities: 2 General Purpose Laboraties, 1 Multi-configuration Specialty Laboratory, 1 Holographic Experimentation Laboratory
    • Primary Computer Systems: 1 Primary Isolinear Subspace Accelerated Computer Core, Rated at 3,750 Milicochranes
    • Sensor Capabilities: 30x Primary Standard Sensor Palettes (Active Optical, EM, Gravitic and Subspace Sensors, Passive Chronometric Sensors), 1 Ventral Sensor Bay with Long-range Survey Equipment
  • Auxiliary Craft
    • Warp Capable Smallcraft: 1x Flyer-class Heavy Shuttle, 2x Type-11 Shuttles
    • Sublight Smallcraft: 4x Type 16 Shuttlepods
    • Emergency Smallcraft: 38x ASRV Escape Pods
    • Smallcraft Facilities: 1 Primary Maintenance Bay, Equipped with Class 2B Industrial Replicator
 
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Response to "Geometric Complexity: Warp Nacelle Combinations"

Good explainations, Nob.

Here's my view on those subjects:


Regarding the hull configuration:

In addition to your points, I always wondered what purpose the "neck" section serves.
In TNG, we can see diagrams of the Enterprise inside the warp bubble on computer screens several times. The interesting thing is that the boundary between the two warp field lobes runs through the neck.
As I see it, the reason for the neck is that this boundary should run through the narrowest part of the ship. This configuration increases warp field efficiency and stability (meaning higher possible velocities) and is the reason why the best Starfleet ship classes (the Enterprises) have a neck.
Of course there are ships with wider necks or even without one.

The Excelsior for example has a wider neck because of her transwarp drive. Stress produced by the new engine lead to sturdiness being of higher priority.

That the Sovereign has no neck may have different reasons:
She may be built for combat so a neck would be a weak point (the USS Odyssey was rammed into the neck I think). This, among other things, could explain her big warp nacelles and warp core compensating the inferior hull configuration. This explanation would also work for other, more tactically oriented ship classes.
The "weak point"-explanation would also work for the Sovereign being built for superior impulse maneuverability. Speaking for that are the huge impulse engines.

The Nova and Intrepid have no neck because they're supposed to be able to land, meaning a sturdy hull design is needed.

The Akira is fast with her relatively thin "necks" but because there are two of them, she's also sturdy enough for combat.

The Defiant, as we know, has severe problems with warp speeds higher than warp 9. This could be explained by the absence of a neck, meaning that the boundary of the field lobes runs straight through the ship resulting in a highly unstable warp field that stresses the hull tremendously. Only an extremely powerful propulsion system (as we know from dialogue she has) could make her fast enough.

Most other ship designs could also be explained this way.
Alternatively, at least from the Akira and Sovereign on, Starfleet has found a way to make a neck section redundant. If I remember correctly the problems of the Defiant were solved at some time in the series, so maybe that would speak for this too.


Regarding single nacelle starships:

In addition to bad maneuverability and slow speed, another reason for only one nacelle could be saving ressources. I believe to remember that the stuff from which warp coils are made (verterium cortenide) cannot be replicated, so if Starfleet needs as many ships as possible, a one nacelle configuration is the way to go.


Regarding four nacelle starships:

In my view, four-nacelled ships are the fastest and the most maneuverable, or, when only using two nacelles, the most endurable.
The downside is, as you said, that the warp field requires substantially more tuning, so the complexity of the engine and susceptibility to nacelle imbalance are keeping Starfleet from using this configuration.
Aditionally, verterium cortenide shortages and, maybe, higher fuel consumption would be a factor.


Regarding two nacelle starships:

They would simply be the best of both worlds, being faster and more maneuverable than one nacelle and easier to operate and more economical than four nacelles.


Regarding the odd three nacelle starships:

Alternatively, the third nacelle could be a kind of booster. It would make an ordinary two-nacelled ship faster, but in return makes the warpfield more inefficient and more unstable raising fuel consumption, increasing hull stress and reducing warp maneuverability. Also, to explain the "fifth wheel" remark, the boost gained from the third nacelle could also be accomplished with only two nacelles (modification of the warp coils or the ship's hull, for example), but it is easier to simply stick another one on the ship.


However, quad nacelle configurations offer superior warp maneuverability, particularly in unorthodox pitch and roll maneuvers, making the ships well suited to eluding pursuit or exploring regions of space "off-axis" on the galactic plane.

Are you saying that most starships have problems flying up and down on the galactic plane?
 
Re: Snapshots of an Evolving Starship

Very good, we need an "applause" smiley :lol:
For now, this: :techman: must be enough.

A few notes:

For the earlier Miranda's crew complement of over 300, aren't 50 triple-occupancy life boats insufficient? ... I'm thinking of the Titanic right now ^^

Type 16 Shuttlepods: Do you mean Type 18 Shuttlepods?
http://en.memory-alpha.org/wiki/Type_18_shuttlepod

Flyer-class Heavy Shuttle: Is this supposed to be the same as the Delta Flyer?
 
On the "neck" issue, I remain rather agnostic on that. I do think it's a matter of subspace field geometry, but I think that's more to do with enabling a more efficient layout combination of engines + secondary hull. "Neckless" ships in general have very small engineering hulls, though streamlining in the case of the Intrepid and Sovereign mean a slight difference there. (Their hull shape is still similar enough that they're "necked" designs).

The "off-plane" thing isn't really meant to imply other ships have trouble doing it as much as implying it's easier for a quad-nacelle ship to make rapid shifts in that direction. I'm probably going to remove it with a revision.

Quad-nacellers IMO basically give up sublight performance for warp performance. Nacelles are freaking heavy, they're by far the densest part of the ship. So tacking 4 of them onto a ship, no matter how great for warp maneuverability, endurance, or even dash speed, is an awful decision for the ship's mass balance in normal space operations. Also, The need to precisely attune their field geometry I think also makes them more vulnerable to damage.

The Miranda lifeboat figures are actually a bit lazy. I need to go back and revise them. I do figure, though, that reducing lifeboat size and volume is one of the things that also raises usable payload volume.

For the shuttlepods, I meant Type 16, which in the TNGTM are an extended range version of the Type 15.

The Flyer-class is indeed a mass produced variant of the Delta Flyer II (as depicted on the Horne from Over a Torrent Sea)
 
Regarding the neck:

I would say then that the existence of a neck in general is, as you said, for "enabling a more efficient layout combination of engines + secondary hull", but the fact that they are so narrow is because of the benefits that has for the warp field geometry. Otherwise they would have been built wider and therefore stronger from the beginning (say, as wide as the engineering hull itself).


Regarding Quad-nacellers:

I agree on the heavy nacelles as the main reason for their rarity with the other points as further reason not to build them. The only things speaking for them are their very high endurance and dash speed.
Maybe the weight problem is also another reason against 3-nacelled ships.


EDIT: I just realized that the spindly design of the neck (together with the nacelle pylons) could be all about saving weight. They're only as strong as is needed, and more combat-oriented ships have another, more rugged design altogether.
 
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A note on coleoptric nacelles.
Coleoptric nacelle designs, those shaped like an annular ring circumscribing the vessel perpendicular to the direction of travel (z-axis), can be thought of in two ways, both seem similarly useful. The first to imagine a single nacelle that has been expanded radially and contracted linearly compared the z-axis. The second is to imagine a single nacelle that has been bent into a torus around the ships hull.

Either way, there are some interesting repercussions. The first are geometrical in nature. The coils are spread over a larger volume. This would indicate that the same amount of energy impinged upon a coleoptric coil would be spread over a larger area, which might mean the segments could be thinner for the same warp material being driven at the same warp factor. This would explain why they would have a longer lifespan and faster acceleration compared to more normal coils. It would also imply a tighter turning radius and overall better warp maneuverability as well as a more touchy nacelle that is more susceptible to external influences. However, the simpler geometry would tend to simplify warp geometry calculations.

Even with thinner segments, the total coil volume seems so much larger that it would likely be more resource intensive to build. And with large outer circumference, it would seem the plasma conduits would have to be of a higher caliber, further intensifying material use. All that mass expanded that broadly would extract a heavy toll on impulse maneuverability as well. Of course, the Vulcan tendency for long slender hulls would allow for high torque maneuvering thrusters far fore and aft, negating this disadvantage.

The Vulcan needle-like hull indicates the warp field created by coleoptric nacelles tends to make fields of very low z-axis compression with a small x-y profile. Under the rules previously expressed, this would indicate high peak-transition efficiency and low integer efficiency. (This is the opposite of that expressed in the nacelle side-note above.)

other notes whenever I have the time. For the moment let me say simply: nicely logical.
 
Well the only real official explanation we've gotten about Vulcan hull forms comes from A Choice of Futures (Rise of the Federation Vol.1) where Tobin Dax describes that the hull silhouette is in fact a result of the stated design goal of Vulcan ships rather than a result of warp dynamics. Specifically as combat oriented designs they're designed to have small forward aspect ratios to present a smaller target to the enemy.

The lack of maneuverability is also noted as a feature of coleoptric drives. The combination leads me to believe that they're able to project a very smooth, very even warp field. Also the sheer diameter of the "coil" would essentially make a single unified field, something like putting a very wide aspect warp nacelle together.

The end result would basically be a hull form that would try to make up for the width of the nacelle if it wanted better peak transition efficiency.
 
Response to "Geometric Complexity: Warp Nacelle Combinations"

Good explainations, Nob.

Here's my view on those subjects:


Regarding the hull configuration:

She may be built for combat so a neck would be a weak point (the USS Odyssey was rammed into the neck I think).

Interesting theory, however the Odyssey was rammed in the engineering hull and the debris bounced into the starboard nacelle.

The Defiant, as we know, has severe problems with warp speeds higher than warp 9. This could be explained by the absence of a neck, meaning that the boundary of the field lobes runs straight through the ship resulting in a highly unstable warp field that stresses the hull tremendously. Only an extremely powerful propulsion system (as we know from dialogue she has) could make her fast enough.
O'BRIEN: What sort of design flaws?
SISKO: You'll have complete access to the ship evaluation reports but to put it simply, it's overgunned and overpowered for a ship its size. During battle drills, it nearly tore itself apart when the engines were tested at full capacity.
It might be the opposite, where a lower-powered propulsion system could make her fast and not tear herself apart (we've seen small, low-powered ships hit high warp speeds like the Delta Flyer.) The Defiant's extra powerful power systems OTOH comes with a penalty of overstressing the ship.


On the subject of X number of nacelles -has there been any dialogue in the different series to indicate an advantage of one over the other?
 
Loving the new stuff, Nob. I agree that your treatise on nacelles and hull geometry are my new standards, as well as the weapons.

I am surprised you thought your weapons section would be controversial - the only thing I found myself disagreeing with was the notion that there are internal hull segments on ships with old-style "ball turrets." Does that mean you think there's an array under the hull? If so, why not just have ball turrets built with newer tech? I do agree with your assertion about why arrays are better and the role hull structure has to play in it.

I also really like what you have to say about the Miranda. To my thinking, each time a new generation of starship/tech is released, there's always a prototype that attempts to evaluate the validity of newer tech on the older design, making itself a pattern for future class refits. I think you've more or less done the same.

Again, fantastic work as always. :)
 
I am surprised you thought your weapons section would be controversial - the only thing I found myself disagreeing with was the notion that there are internal hull segments on ships with old-style "ball turrets." Does that mean you think there's an array under the hull? If so, why not just have ball turrets built with newer tech? I do agree with your assertion about why arrays are better and the role hull structure has to play in it.

My assumption with the refitted arrays is that the arrays are there under the hull, but only consist of the EPS conduit and prefire chamber. Basically they serve as very long "chambers" or "drums" for the emitter segment installed in the old spots where the ball turrets used to have their full equipment.

One reason was component commonality. Making a whole new set of parts and R&D design for non-arrayed emitters seems pretty wasteful.

Second, I figured the whole system was substantially more capable than the old one. So that even if you fed advances into the old configuration, you simply wouldn't get much out of it. So instead they use a common system and use the existing hull shape to do what the new arrays can do. That still comes with trade-offs, like the whole heat and fire arc issue, but it lets you use the same type of firepower between fleet common ships.

Also, when we start seeing the old 23rd century designs firing in DS9, they seem to only fire from one or two banks at any one time. That would make sense if they were tied together in some way and therefore could direct their energy in one or two banks rather than having to fire them all at once.

The other possibility is that making an old style emitter with comparable capacity as the arrays would require such a huge power cell or support machinery within the hull that it would make for a terrible technological upgrade. Pulse phasers being a minor exception, but even then those things are big suckers and have limited fire arcs.

In general having more "prefire chambers" scattered underneath the hull connected array segments is also partly an explanation why newer ships also seem to have array segments that are sub-divided along their hulls. So some of these arrays are actually parts of a larger array that's connected under the hull, but protected at the most vulnerable sections or emitter facets are removed to add some redundancy.
 
Interesting theory, however the Odyssey was rammed in the engineering hull and the debris bounced into the starboard nacelle.

Ah, I see. Couldn't quite remember if it was the neck or the engineering hull.

It might be the opposite, where a lower-powered propulsion system could make her fast and not tear herself apart (we've seen small, low-powered ships hit high warp speeds like the Delta Flyer.) The Defiant's extra powerful power systems OTOH comes with a penalty of overstressing the ship.

So the ship could pump more energy into its engines than the hull (or possibly the Structural Integrity Field) could handle?



Regarding phaser arrays:

I think of the trench in the middle of the array segments as the actual emitter. So the emitter is always as long as the whole array.
The phaser energy would be prepared in the prefire chambers below and then released into the trench, where a force field of some kind holds and transports the energy to the emission point where it is then released as a beam (maybe confined in an "annular confinement beam").
That way, the problem of the feasability (because of heat) of one array segment emitting the energy of the whole array would be avoided. Nob Akimoto's phaser arrays under the hull, because they only have single small emitters, would still have this problem, yet have some advantages of phaser arrays too.
 
In general having more "prefire chambers" scattered underneath the hull connected array segments is also partly an explanation why newer ships also seem to have array segments that are sub-divided along their hulls. So some of these arrays are actually parts of a larger array that's connected under the hull, but protected at the most vulnerable sections or emitter facets are removed to add some redundancy.

Yeah. I also think that already the ball turret phaser banks of 23rd century ships were linked together, so they can always have the energy where it's needed.
Same goes for arrays, but I think even then, a short array could not fire with the power of a longer array, it could only fire with its maximum output forever (well, at least until it burns out ^^) with the power supply from the long array.
 
Interesting theory, however the Odyssey was rammed in the engineering hull and the debris bounced into the starboard nacelle.

Ah, I see. Couldn't quite remember if it was the neck or the engineering hull.

Yeah. I was also a bit quick in my reply as I forgot to add that IMHO once the shields go down (or in Odyssey's case, "divert shield power to weapons") pretty much the whole ship is vulnerable. A neck hit, engineering hull or nacelle hit could be just as fatal or crippling against a powerful weapon or ship ramming into it.

It might be the opposite, where a lower-powered propulsion system could make her fast and not tear herself apart (we've seen small, low-powered ships hit high warp speeds like the Delta Flyer.) The Defiant's extra powerful power systems OTOH comes with a penalty of overstressing the ship.
So the ship could pump more energy into its engines than the hull (or possibly the Structural Integrity Field) could handle?

I think so / maybe.

There appears to be more detail in "The Sound of Her Voice" where the Defiant can push it to Warp 9.5 but only after diverting her phaser reserve power into the SIF.

Since Worf says the phaser reserves can be emptied, then it appears that the Defiant is unable to produce the extra power the SIF would need to protect herself above Warp 9 even though her engines are capable of going well past it.
BASHIR: We need more speed.
O'BRIEN: Speed's not the problem. I could increase the warp plasma ninety seven gigahertz. That would increase our velocity to warp nine point five and save us almost a full day.
WORF: The problem on the Defiant is how to maintain structural integrity when we go above warp nine.
O'BRIEN: Exactly. At those kinds of speed the ship literally starts tearing herself apart.
SISKO: Is there any way to strengthen the structural integrity field?
O'BRIEN: Not without bleeding power from some other source.
SISKO: Such as?
O'BRIEN: The phaser reserves.
WORF: That would be unwise. If we empty the defense reserve, we could find ourselves at an extreme disadvantage should we encounter a Dominion ship.
BASHIR: We're a long way from the front lines out here, Worf. The chances of meeting a Dominion ship are negligible.
WORF: We should not take that risk.
BASHIR: She'll die if we do not get to her faster.
SISKO: Use the phaser reserve, Chief. Give us all the speed you can.
O'BRIEN: Aye, sir. Thank you, sir.
On a rethink, her engines are overpowered but not enough to adequately power her SIF so a lower-powered system wouldn't help. So there probably are other factors at play that determine top speed and stress...
 
In "Valiant" the Defiant class warp core is described as being a "Class 7" drive. Theoderich Patterson describes Voyager's warp drive system as being a "Class 9" in "Relativity" and being the first to be tested in deep space. I wonder what that actually means.

Does the output of a warp drive system increase geometrically? (That was my assumption in the Class 5/Class 6 core distinctions in the Miranda configs). Or does the "class" refer to something other than output?

The dialogue in "The Sound of Her Voice" at least confirms that Defiant's phasers require power cells of some sort (which are then shown in other episodes).

Several episodes also claim Defiant had the energy signature of much larger ships, so I suppose the question is what the heck takes up so much of her energy output that she can't spare enough to the SIF to run flat out without shaking to pieces?

Is it simply a split between warp drive/everything else? Or maybe how the power systems are configured?

We also know that her engines have so much output that her cloak doesn't actually adequately hide her. Does that come from the fact that the cloak is too small? Or that the available power that can be shunted from the warp engines to other systems is somehow restricted?
 
Also, when we start seeing the old 23rd century designs firing in DS9, they seem to only fire from one or two banks at any one time. That would make sense if they were tied together in some way and therefore could direct their energy in one or two banks rather than having to fire them all at once.

It wasn't just in DS9 that you can see this. In TOS, the Enterprise had 4 phaser banks ("The Paradise Syndrome") that could be fired individually or all at once through 2 phaser emitters. We've seen:

1. All 4 phaser banks fire simultaneously through 2 emitters in "The Paradise Syndrome",
2. Phaser banks 1+2 through 2 emitters in "For The World Is Hollow..."
3. And phaser banks individually discharged through 3 individual phaser emitters in sequence in "Balance of Terror"
4. And phaser banks individually discharged through 2 individual phaser emitters simultaneously in "The Paradise Syndrome."

So even back in TOS, the phasers were all tied together in a way that the "phaser banks" were independent of the external phaser emitters.

Since the TOS Enterprise couldn't fire all four phaser banks at once without channeling all her power into phasers then during combat she would be limited to being only able to discharge a phaser bank or two at a time while keeping her shields up and engines powered for maneuvering. This accounts for later era ships as well. They could fire more emitters at once or put far more power into each phaser strike but always at the expense of shields and/or maneuverability.

I think that the Galaxy-class and other ships that use "arrays" also are powered by such phaser "banks". In the "Conundrum" the E-D has 10 phaser banks which is fewer than the number of external arrays and individual beam emitters that the ship has. I would guess that her short strips are capable of channeling all her phaser output and that the any extra length is more for redundancy.

We do see the E-D in the "Nth Degree" supposedly firing her phasers at the "hottest" they can be fired while still maintaining shields and traveling at impulse power. So for the E-D her max phaser output might be limited to the phasers itself and not how much power the ship can channel to them. (This would curiously make her phasers less powerful than an upgraded Excelsior-class in DS9 and the Defiant-class.)
 
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