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Exploratory Cruiser Avalon (CE-31)

Note: this model is merely an engineering study, intended to convey to players the general layout of the ship and limited by my poor modeling skills.

Hesperides-class exploratory cruiser Avalon, CE-31
Date of launch: 2093


Height: 75 m
Diameter (without radiators/fins): 14 m
Width (with radiators/fins): 26 m
Loaded mass: ~2000 tons
Empty mass: ~500 tons
Mass Ratio: 4
Loaded Acceleration: 1.2 g
Max Acceleration (hull-limited): 3 g
DeltaV: 31 km/s
Crew Complement: 18
Max Duration: 16 months
Propulsion system: 5 General Atomics MHD-closed Gas-Core Nuclear Thermal Rockets (GCNTR)
Fuel: Uranium hexaflouride
Propellant: Liquid methane
Max Thrust: 4.1 mega-Newtons each
ISP: 2300 seconds (Exhaust Velocity = 23000 m/s)
Maneuvering (space): Reaction control system, liquid-methane arcjet; thrust vectoring during burns
Time for 180 degree rotation: 15 minutes (0.2 degrees/s) without vectoring, 3 minutes with vectoring (1 degree/s)
Powerplant: 2 megawatt compact nuclear reactor (10 tons)
Radiator Heat Elimination Capacity: 4 megawatts
Maneuvering (atmosphere): Aerodynamic control surfaces; thrust vectoring during burns
Sensors: L-band, X-band radars on foldout booms, telescopes (infrared and visual)
Armament: 15 Stiletto casaba-howitzer missiles (5 km/s DeltaV, 2 kt shaped-charge warhead)

The SGS Avalon with landing-jacks extended, astrogation dome exposed, and docking collar petals unfolded.

Cutaway view of SGS Avalon crew/payload section. Telescopic crane with crew-carrier extended. Crewmen presented at bottom for scale.

Crew/Payload section cutaway view.

Deck 1: Payload bay. Typically unpressurized during space travel. Magazine for casaba-howitzer missiles is to the right, taking up 1/4 of deck volume.

Deck 2: Engineering and payload bay airlock. Central feature is Seaton Drive unit. All crew in these images are presented at their acceleration positions, this being the Chief Engineer next to an acceleration couch.

Deck 3: Consumables storage and Astrogator's station.

Deck 4: Crew Quarters, including 12 bunks, showers, head, and tape-library with readers. Doubles as radiation storm-cellar.

Deck 5: Life support. Columns are CO2 removal/Oxygen generation algae colonies. Torus is water treatment.

Deck 6: Command. Shown are stations for Captain, Pilot, Propulsion Specialist, and Communications Specialist.

Deck 7: Med bay, Captain's quarters, XO's quarters. Foreground-right are XO's quarters with footlocker and foldaway bunk.

Deck 8: Main airlock and access to docking collar.

Docking collar with folding nose-petals.