Category: [VESSEL DESIGN]
Type: [Capital Ship, Combatant/Escort, Colony Support Vessel]
The Atlas-class Capital Torchship is a baseline reference design for the Terran Sphere’s most formidable FTL-capable vessels, typically those with a flight mass exceeding 5 kilotonnes. These powerful ships serve as flagships for Federal Expeditionary Fleets, heavily armed escorts for megacorp convoys and colony initiatives, or as long-range strategic assets. Their defining features are a [Condensed Nugget Torch] antimatter drive providing immense sustained thrust and specific impulse, and a full-scale [NECL Ring Stack] enabling rapid interstellar travel at high FTL velocities (rated cruise $17c$).
| Parameter/Symbol | Meaning/Description | Atlas-Class Value |
|---|---|---|
| $M_{\text{flt}}$ | Fully-Fitted Flight Mass (at mission start) | $1.2 \times 10^4 \, \text{tonnes}$ ($12,000 \, \text{t}$) |
| Crew Complement | Standard operational crew | $\approx 350 - 500$ (Core officers & ratings, engineers, technicians) + up to ~2,000 mission specialists (e.g., marines, flight wing personnel, colonists) |
| FTL Systems: | ([CID FTL Drive] based) | |
| $R_{\text{ring}}$ | NECL Ring Mean Radius | $130 \, \text{m}$ |
| $v_{\text{FTL}}$ | Rated FTL Cruise Velocity (battery-limited, $\approx 17.4c$) | $17 \, c$ |
| $E_{\text{jump}}$ | Energy per $17c$ FTL jump (independent of distance) | $7.3 \times 10^{15} \, \text{J}$ ($\approx 1.8 \, \text{Mt}$) |
| $Q_{\text{waste}}$ | Waste heat stored per jump ($\varepsilon = 2 \times 10^{-4}$) | $1.47 \times 10^{12} \, \text{J}$ (fills the $1.5 \times 10^{12} \, \text{J}$ battery) |
| Range | Per charge, set by NECL droplet coherence time ($T_{\text{coh}} \approx 0.59 \, \text{yr}$) | $10 \, \text{light-years}$ |
| $P_{\text{charge}}$ | FTL Charge Power: own torch in power mode (example), or berth beam | $\approx 50 \, \text{GW}_e$ (torch) / $20 \, \text{GW}$ (beam) |
| $t_{\text{re}}$ | NECL Recharge Time ($E_{\text{jump}} / P_{\text{charge}}$) | $\approx 41 \, \text{h}$ (torch, ~0.12 kg of antiprotons) / $\approx 4.2 \, \text{days}$ (beam) |
| Sublight Propulsion: | ([Condensed Nugget Torch] based) | |
| $T_{\text{std}}$ | Sustained Torch Thrust | $30 \, \text{MN}$ |
| $a_{\text{std}}$ | Steady Acceleration (at $M_{\text{flt}}$) | $\approx 0.255 \, g$ ($2.50 \, \text{m s}^{-2}$) |
| $T_{\text{max}}$ | Emergency Torch Thrust (duration $\leq 60 \, \text{s}$) | $75 \, \text{MN}$ |
| $a_{\text{max}}$ | Peak Acceleration (at $M_{\text{flt}}$) | $\approx 0.64 \, g$ ($6.25 \, \text{m s}^{-2}$) |
| $v_e$ | Torch Exhaust Velocity | $3.0 \times 10^7 \, \text{m s}^{-1}$ ($0.10 \, c$) |
| $\dot{m}_{\text{ap}}$ | Antiproton Mass Flow Rate (for $T_{\text{std}}$) | $7.2 \, \text{g s}^{-1}$ |
| $\eta_m$ | Fraction of total annihilation power reaching the jet (Torch) | $\approx 0.35$ (35%) |
| $\dot{m}_{\text{jet}}$ | Total propellant flow (Li₆D working mass + nuggets) | $\approx 1 \, \text{kg s}^{-1}$ ($\approx 1,800 \, \text{t}$ and $\approx 13 \, \text{t}$ of antiprotons per full burn of about three weeks) |
| Torch energy budget | $P_{\text{ann}} = 2 \dot{m}_{\text{ap}} c^2 \approx 1.3 \, \text{PW}$: ~35% to the jet, the bulk escapes as neutrinos, $\gamma$ and pions; the ship-absorbed fraction is $\approx 10^{-5}$ ($\approx 13 \, \text{GW}$) | Rejected by ~26,000 m² (emitting area) of ~1,800 K radiator “sails” behind a ~500 m boom |
| Max. Sublight $\Delta v$ | Theoretical change in velocity (main torch propellant) | $\approx 4,870 \, \text{km s}^{-1}$ ($\approx 0.016c$) |
Governing Equations (Reference):
| Category | Subsystem / Content | Mass (tonnes) | Key Technologies & Notes |
|---|---|---|---|
| A. Dry Spacecraft | (Total: 5,600 t) | (5% engineering margin embedded in subsystem values) | |
| Microlattice Frame | 520 | Heavy-duty [Microlattice Spaceframe] scaled for capital vessel stresses. | |
| CNT Hull Skin | 140 | Reinforced [Aramid-CNT Hull], potentially with added armor layers. | |
| NECL Ring Stack | 2,550 | Scaled-up [NECL Ring Stack] with $130 \, \text{m}$ radius, significant mass. | |
| Nugget Torch + Penning Traps + Radiator Sails | 1,030 | [Condensed Nugget Torch] engine assembly (~900 t), extensive magnetic shielding, cryogenic systems for nugget storage, plus ~130 t of radiator sails on the boom. | |
| Life Support & Habitation | 350 | Expanded [Closed-Loop Life Support (Eden Stack)] supporting a large crew for extended durations; extensive crew quarters, command & control decks, medical bays, recreational facilities. | |
| Avionics / Photonic Navigation Core | 40 | Advanced [Quantum-Optical Nav Array], battle management computers (sealed photonic, $\leq 8 \, \text{MW}$), extensive sensor suites (capital-grade, long-range), secure comms. | |
| Tankage & RCS Hardware | 970 | Massive propellant tanks for Li₆D (torch working mass) and RCS fuel (no auxiliary fusion plant); robust RCS thruster systems. | |
| B. Thermal Battery | 1,500 t | PCM/Graphite Vaults: Enlarged [Molten-Salt Heat Battery] capacity for one rated 17c jump ($1.47 \times 10^{12}$ of $1.5 \times 10^{12} \, \text{J}$) or extended high-power operations. Doubles as distributed internal shock shielding. | |
| C. Consumables | 2,200 t | Main Propellant (Lithium-6 Deuteride slush for torch), RCS fuel, antimatter nugget mass (small fraction), [Closed-Loop Life Support (Eden Stack)] make-up mass, ordnance, spare parts for [Picoforge Cluster]. | |
| D. Payload & Magazines | 2,700 t | Cargo holds, fighter/shuttle bays (if configured as carrier), weapon systems (e.g., kinetic salvos, laser batteries, missile launchers, [Bubble Torpedoes] in secure magazines), electronic warfare suites, marine complements, colony starter kits. | |
| Fully-Fitted Flight Mass | (Total Operating Mass at Mission Start) | 12,000 t |
The Atlas-class Capital Torchship, or vessels built upon its reference hull design, represent the apex of conventional Terran Sphere starship engineering in terms of scale, power, and strategic capability. These behemoths are not typically lone wolves but form the core of major fleets, whether military, exploratory, or supporting large-scale colonization efforts. Their presence signifies serious intent and substantial resource commitment. Designed for extended mission durations of many months or even years between major resupply, they boast significant consumable stowage and robust, repairable systems.
Core Systems & Capabilities: The heart of the Atlas is its [Condensed Nugget Torch]. By annihilating approximately $7.2 \, \text{grams}$ of antiprotons per second with a Lithium-6 Deuteride (Li₆D) propellant stream, the torch generates a sustained $30 \, \text{MN}$ of thrust. This allows the 12,000-tonne vessel to achieve a continuous $0.255 \, g$ acceleration (a full burn of about three weeks, using ~1 kg/s and ~1,800 t of propellant), enabling high-speed drifts for strategic positioning or rapid interplanetary transits within a system. For emergencies, the torch can surge to $75 \, \text{MN}$ for up to 60 seconds, providing a respectable $0.64 \, g$ for critical maneuvers. A full 60 s surge raises the absorbed heat to about $32 \, \text{GW}$; the $\approx 19 \, \text{GW}$ the sails cannot shed ($\approx 1.2 \times 10^{12} \, \text{J}$, about 78% of the heat battery) goes into the battery, so a surged Atlas must cool down before it can jump. That is gentle enough to need no rig; [Flex-Rig Exosuits] are worn only against combat jolts.
Interstellar travel is facilitated by a massive [NECL Ring Stack] with a mean radius of $130 \, \text{meters}$, enabling the entire vessel to “slide” via its [CID FTL Drive] at a rated cruise velocity of $17 \, c$. A standard 10-light-year jump (about 0.59 years of ship time, the limit of the NECL droplets’ coherence) requires a colossal $7.3 \times 10^{15} \, \text{J}$ of energy, roughly 1.8 megatons. The $1,500 \, \text{tonne}$ [Molten-Salt Heat Battery] absorbs the $1.47 \times 10^{12} \, \text{J}$ of waste heat from such a jump, which nearly fills it, so a mandatory cool-down cycle follows each jump, where the heat is radiated by the ship’s [Thermal Control Suite (Starship)]. During intense combat, this massive thermal battery also serves as a distributed internal shock shield, absorbing some of the kinetic energy from non-penetrating impacts.
Recharging the NECL charge store for another major jump is an energy-intensive process. An Atlas can run its own torch in power mode (about 0.12 kg of antiprotons per charge, roughly 41 hours at $50 \, \text{GW}_e$), or take a beam of up to $20 \, \text{GW}$ (about 4.2 days) from a capital-class [FTL Interface Port]. A charged Atlas holds about 1.8 Mt of energy, so it keeps a standoff of at least ~2,000 km from habitats and no berth ever charges one up close. Its Bubble Torpedoes ride in the magazines uncharged. Port facilities must also supply resources like an estimated $600 \, \text{tonnes}$ of liquid helium for cooling the antimatter Penning traps after extended operation or maintenance cycles.
Operational Doctrine & “Analog-Heroic” Command: Atlas-class vessels are complex systems requiring large, highly skilled crews, typically numbering between 350 to 500 core personnel, with additional capacity for mission specialists, marine detachments, or even early-phase colonists. While automation handles many routine tasks, command and critical decisions remain firmly in human hands, a legacy of the [Wildcode Crisis]. The bridge of an Atlas is a sophisticated command center, but with numerous tactile overrides and direct readouts. The sealed photonic navigation core and primary battle computers operate well below wildcode thresholds (e.g., $\leq 8 \, \text{MW}$ total for critical sealed compute). Combat doctrine involving Torchships often involves staggered engine burns. The intense gamma flare from the torch’s $0.1c$ exhaust plume can blind sensors across thousands of kilometers. Thus, ships may employ short, three-second “hammer pulses” of thrust, allowing targeting optics and sensor arrays to recover and reacquire targets between burns.
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