08-23-2019, 04:15 AM | #1 | ||||
Join Date: Dec 2013
|
[Spaceships] Eclipse Phase Spacecraft
RPG industry luminary John Snead wrote the spacecraft chapter for the Eclipse Phase roleplaying game and in discussions on the EP forums revealed that the designs were fairly realistic and provided the vital performance numbers for the various spacecraft. Using these, I have attempted to create the nearest GURPS approximations of the EP Destroyer and Fighter.
Destroyer Quote:
Quote:
Code:
Front System [1] Hardened Nanocomposite Armor (dDR 50(2)) Hangar Bay (300 tons) Tactical Array (comm/sensor 11) [2-5] Fuel Tanks (each 1,500 tons providing 72 mps) [6] Control Room (C10, comm/sensor 10, no control stations) Centre System [1] Hardened Nanocomposite Armor (dDR 50(2)) Fuel Tank (1,000 tons providing 48 mps) [2] Cargo Hold (1500 tons) [3-4] Fuel Tanks (each 1,500 tons providing 72 mps) [5-6!] 2x Battery (see notes) [core] Control Room (C10, comm/sensor 9, 10 control stations) Habitat (120 cabins, see notes) Rear System [1] Hardened Nanocomposite Armor (dDR 50(2)) ⅔ High-Thrust Antimatter Plasma Rocket (0.013 G) [2-6] 5x High-Thrust Antimatter Plasma Rocket (0.1 G) [core] Fuel Tank (500 tons providing 24 mps, see notes) ⅔ Antimatter Reactor (2 PP, see notes) Code:
TL 10 Spacecraft Destroyer dST/HP 200 Hnd/SR -3/5 HT 13 Move 0.11G/504 mps LWt. 30,000 Load 1809 (see notes) SM +11 Occ 90ASV (see notes) dDR 50(2) Cost 18,321,250,000 (see notes) The Destroyer has Total Automated (p. SS29) and is TL11 for Complexity purposes (p. SS8-6) The Destroyer runs on antimatter-boosted hydrogen/water, for a refueling cost of $18B per tank. Since antimatter production in Eclipse Phase is mature and large-scale, it may be reasonable to lower this to the same cost as antimatter-catalyzed hydrogen/water, for $30M/tank. You're not supposed to put Power Plants in a Smaller System, but for reactors producing 4 PP, it seems reasonable that a system a third of the size can produce at least 1 PP. Since the Destroyer represents a generic spacecraft the exact weapon loads have been left up to the needs and desires of the individual user. As an example: 30x VRF 3MJ Improved laser turrets, 20x 16cm electromagnetic gun turrets, 10x 32cm Missile Launcher turrets. Since the Destroyer represents a generic spacecraft and some may not have living crews at all, the exact composition of the Habitats is left up to the needs and desires of the individual user. As an example: 44 Cabins, 2 Luxury Cabins, a Ready Room (double Briefing Room/Establishment), 15 Minifacs, 2 Cells, a 10-bed Sickbay, three ops centres, a quintuple-size briefing room, and five different recreational Establishments. The Sickbay has automeds, increasing the cost of the Destroyer by $1M. While Spaceships has all fuel tanks for antimatter-based fuels be treated as Volatile systems, it seems rather reasonable to allow the antimatter to be concentrated in a single system: in this case a [core] fuel tank. The other Fuel Tanks should therefore not be considered Volatile systems. Since the Cargo Hold contains 200 tons of HEDM rocket fuel for the Fighters, it's a Volatile system. (Ideally this should be in a core system, but I ran out of slots for things that needed to be protected. If you think it's vital to locate Volatile systems in a core section, swap the Front Hull for an Upper Stage and shove 500 tons worth of HEDM and Fighter munitions into a [core] location. If you're wondering why I didn't slash the core small-size Control Room, it's because the full-size Control Room is only there to improve Hnd/SR: the core Control Room is the primary control room and is in a [core] location to increase its suitability. Putting a Volatile system right next to the Habitat also did not appeal.) The Destroyer can have the Stealth (p. SS30) feature for +20M to cost. The Destroyer can have the Self-Healing (p. SS7-22) feature for +600M to cost. Fighter Quote:
Quote:
Code:
Front System [1] Hardened Nanocomposite Armor (dDR 5(2)) [2!] Major Weapon (16cm Missile Launcher) [3-6] Fuel Tanks (each 1.5 tons providing 0.7 mps) Centre System [1] Hardened Nanocomposite Armor (dDR 5(2)) [2!] Medium Battery (3x 1MJ Improved laser turrets) [3-4!] Major Batteries (2x 8cm electromagnetic gun turrets, see notes) [5-6] Fuel Tanks (each 1.5 tons providing 0.7 mps) [core] Control Room (C7, comm/sensor 3, 1 control station) Rear System [1] Hardened Nanocomposite Armor (dDR 5(2)) [2-5] Fuel Tanks (each 1.5 tons providing 0.7 mps) [6] HEDM Rocket (2G) [core] Fusion Reactor (2 PP) Code:
TL 10 Spacecraft Fighter dST/HP 15 Hnd/SR 0/4 HT 12 Move 2G/7 mps LWt. 10 Load 0.1 SM +4 Occ 1ASV (see notes) dDR 5(2) Cost 640,000 (see notes) The Fighter has Total Automated (p. SS29) and is TL11 for Complexity purposes (p. SS8-6) The atmospheric performance of the Fighter gives it Air Move 20/175. If Streamlined and Winged for +50K to cost, dDR reduces to 3(2) but Air Hnd/SR increases to 4/5 and Air Move to 20/1750. Each tank of HEDM costs $3,000 to refill. Medium Batteries aren't an allowed system at SM+4, but it doesn't seem completely unreasonable to allow one. As an alternative, make all the armour components SM+3 (dDR 3(2)), shove the two centre Fuel Tanks into the freed space, and have three Major Batteries of 3MJ Improved laser turrets. Alternative to the Improved lasers, consider UV lasers for improved range. Alternative to the 8cm electromagnetic gun turrets, consider RF 4cm emag gun turrets or VRF 2cm emag gun turrets. The Fighter can have the Stealth feature (p. SS30) for +125K to cost. The Fighter can have the Self-Healing feature (p. SS7-22) for +200K to cost. The single control station can be removed for -50K to cost. Last edited by Eukie; 08-23-2019 at 02:08 PM. Reason: Corrected Destroyer acceleration and refueling cost |
||||
08-23-2019, 07:14 AM | #2 | ||
Join Date: Dec 2013
|
Re: [Spaceships] Eclipse Phase Spacecraft
Standard Transport
Quote:
Quote:
Code:
Front System [1] Advanced Laminate Armor (dDR 20) Fuel Tank (333 tons providing 24 mps) [2-6] Habitat or Cargo Hold (300 cabins or 2500 tons of cargo, see notes) [core] Control Room (C10, comm/sensor 9, 10 control stations)* Centre System [1] Advanced Laminate Armor (dDR 20) Fuel Tank (333 tons providing 24 mps) [2-3] Fuel Tanks (each 500 tons providing 36 mps) [4-6] Habitat or Cargo Hold (180 cabins or 1500 tons of cargo, see notes) [core] Habitat or Cargo Hold (60 cabins or 500 tons of cargo, see notes) Rear System [1] Advanced Laminate Armor (dDR 20) Fuel Tank (333 tons providing 24 mps) [2-4] Fuel Tanks (each 500 tons providing 36 mps) [5-6] 2x High Thrust Fusion Rocket (0.02 G)* * each of these systems has 1 Workspace Code:
TL 10 Spacecraft Standard Transport dST/HP 150 Hnd/SR -4/5 HT 13 Move 0.02G/252 mps LWt. 10,000 Load up to 5401 (see notes) SM +10 Occ 13AV (see notes) dDR 20 Cost 260,000,000 (see notes) The Standard Transport uses Spin Gravity (p. SS30) and is TL11 for Complexity purposes (p. SS8-6) Each tank of hydrogen propellant costs $1M to refill. The default configuration for the Standard Transport offered here is wholly dedicated to cargo transport by a synthmorph crew. Any number of the 9 Cargo Holds can be exchanged for 60 cabins at a cost of +10M and 1 extra Workspace each. The configuration suggested in Snead's notes seems to comprise two Cargo Holds, 200 Luxury Cabins, and 60 cabins worth of specialized rooms (p. SS18), increasing the cost by 50M. The Standard Transport can have the Total Automation feature for +15M plus 5M per 60 habitats to cost. The Standard Transport can have the Self-Healing (p. SS7-22) feature for +200M to cost. |
||
08-23-2019, 07:58 AM | #3 |
Join Date: Feb 2016
|
Re: [Spaceships] Eclipse Phase Spacecraft
In GURPS, there is nothing realistic about a 2,000 metric tons container holding 150 metric tons of antimatter at TL11 and nothing feasible about having 150 metric tons of antimatter. In Ultratech, one milligram of antimatter requires a trap that masses 9 kg and costs $20,000 (one milligram of antimatter also costs $25,000). 150 metric tons of antimatter would require a 1.35 billion metric ton trap (costing $3 quadrillion) and would cost $3.75 quadrillion.
|
08-23-2019, 10:54 AM | #4 | |
Join Date: Nov 2015
|
Re: [Spaceships] Eclipse Phase Spacecraft
Quote:
|
|
08-23-2019, 11:00 AM | #5 |
Join Date: May 2018
|
Re: [Spaceships] Eclipse Phase Spacecraft
|
08-23-2019, 12:08 PM | #6 | |
Join Date: Aug 2007
|
Re: [Spaceships] Eclipse Phase Spacecraft
Quote:
UT has 1 gram of antimatteer making a 43 kiloton explosion. Therefore a kilogram of antimatter is 43 megaton explosion and ton is a 43 gigaton explosion. Then 150 tons is 6.45 teratons of an explosion. If you wonder you passed the combined nuclear stockpile of the US and the USSR at the peak of the Cold War when you went past 10 gigatons. You haven't quite caught up to the Chixulub dino-killer at an estimated 16 teratons but you get special bonus points for how much of your antimatter explosion in space is in gamma rays. So Earth-Luna space and anywhere else that's inhabited is a no-go zone for antimatter destroyers. The only way the cure wouldn't be potentially worse than the disease was if you were being attacked with missiles that had 150 ton antimatter warheads.
__________________
Fred Brackin |
|
08-23-2019, 12:28 PM | #7 |
Join Date: Aug 2004
Location: Wellington, NZ
|
Re: [Spaceships] Eclipse Phase Spacecraft
A high-thrust antimatter plasma rocket should produce 0.02 G acceleration per unit. Thus the total should be .113G
__________________
Rupert Boleyn "A pessimist is an optimist with a sense of history." |
08-23-2019, 12:43 PM | #8 | |
Join Date: Aug 2004
Location: Wellington, NZ
|
Re: [Spaceships] Eclipse Phase Spacecraft
Quote:
This implies that the antimatter destroyer with 9,500 tons of fuel carries perhaps 10 kilograms of antimatter, and thus 'only' go up in a 430-megaton explosion if the antimatter containment blows.
__________________
Rupert Boleyn "A pessimist is an optimist with a sense of history." Last edited by Rupert; 09-06-2019 at 07:18 PM. |
|
08-23-2019, 01:22 PM | #9 |
Join Date: Nov 2015
|
Re: [Spaceships] Eclipse Phase Spacecraft
Well, at least it's not 150 tons of antimatter.
|
08-23-2019, 02:25 PM | #10 | ||
Join Date: Dec 2013
|
Re: [Spaceships] Eclipse Phase Spacecraft
Fast Courier
Quote:
Quote:
Code:
Front System [1] Advanced Laminate Armor (dDR 10) Fuel Tank (33 tons providing 28 mps) [2-4] Fuel Tanks (each 50 tons providing 84 mps) [5-6] Cargo Holds (100 tons) [core] Control Room (C8, comm/sensor 6, 3 control stations) Habitat (12 bunks, 1 Luxury Cabin, 1 Mini-Nanofac, see notes) Centre System [1] Advanced Laminate Armor (dDR 10) Fuel Tank (33 tons providing 28 mps) [2-6] Fuel Tanks (each 50 tons providing 84 mps) Rear System [1] Advanced Laminate Armor (dDR 10) Fuel Tank (33 tons providing 28 mps) [2-6] 5x High Thrust Antimatter Plasma Rocket (0.01 G) [core] Fuel Tank (50 tons providing 84 mps, see notes) Code:
TL 10 Spacecraft Fast Courier dST/HP 70 Hnd/SR -3/5 HT 12 Move 0.1G/924 mps LWt. 1,000 Load 101 SM +8 Occ 13SAV dDR 10 Cost 565,000,000 The Fast Courier is TL11 for Complexity purposes (p. SS8-6). The Fast Courier runs on antimatter-boosted hydrogen/water, for a refueling cost of $600M per tank. Since antimatter production in Eclipse Phase is mature and large-scale, it may be reasonable to lower this to the same cost as antimatter-catalyzed hydrogen/water, for $1M/tank. As always, the exact habitat makeup is speculative. Each of the two Habitat small spaces can be exchanged for 167 tons of extra cargo holds, reducing the cost by 300K each. (And an additional 1M if the Mini-Nanofac is removed.) This reduces occupancy to 3AV. Each of the two Cargo Holds can be exchanged for 6 cabins, increasing the cost by 1M per system exchanged. While Spaceships has all fuel tanks for antimatter-based fuels be treated as Volatile systems, it seems rather reasonable to allow the antimatter to be concentrated in a single system: in this case a [core] fuel tank. The other Fuel Tanks should therefore not be considered Volatile systems. The three control stations can be removed for a 150K reduction in cost. The Fast Courier can have the Self-Healing feature (p. SS7-22) for a +2M to cost. |
||
Tags |
eclipse phase, spaceships |
Thread Tools | |
Display Modes | |
|
|