GURPS Spaceships for THS conversions?

[laserdog]

Originally Posted by David L Pulver

Ships that use "Fusion Torch" in THS are best repped by TL9 fusion rockets, sometimes with high-thrust. In Fact, the TL9 fusion rocket with/without high thrust is an almost exact match.

Many ships in THS use "Fusion Pulse" and these are probably best repped by the TL10 fusion pulse drives.

Fairly slow ion drive, magsail (plasma sail) and fusion engine vessels, if they operate in low orbit at all (as opposed to from L5 or GEO ports) will often rely on tugs with NTR rockets (fission drive).

Awesome, that's exactly what I was looking for, thanks!

[thtraveller]

Anyone know a good method for doing spin pods in G:Spaceships?

This is my latest attempt at a Meizi role equivalent - an economic passenger spin liner with an Earth-Mars travel time of a few weeks - not an exact duplicate of the Meizi.

Front
1 Armor (Advanced Laminate)
2-4 Habitat
5-6 Cargo

Central
1 Armor (Advanced Laminate)
2-4 Habitat
5-6 Fuel Tank (water)
C Control Room

Rear
1 Armor (Advanced Laminate)
2 Hangar Bay (SM6 or smaller craft)
3 Fusion Rocket (water)
4-C Fuel Tank (water)

Habitat: 180 cabins, 60 luxury cabins, 2 cells, 4 briefing rooms, 8 establishments, 4 offices, 2 sickbays, 32 open space.

The habitat modules are spread around the outside of the hull in the front and central hull sections where spin gravity effects are strongest.

TL10, Spin Gravity (0.2G), dST/HP 150, Hnd/SR -2/5, HT 13, Move 0.015G (144 mps), Lwt. 10,000, Load 1160, Fuel 3000 tons, SM 10, Occ 480 ASV, dDr 30, M$ 260, Length 100 yards, Diameter 40 yards

Cruising Velocity 0.067 AU/day, Burn Endurance 435 hours (18 days)
Trip Time Earth-Mars (median distance 1.8 AU) = 36 days

Economics: Per standard passenger (2 per cabin) $5000/AU, Luxury Passenger $10000/AU, Per ton cargo $750/AU

[thtraveller]

A very cheap Mars or Mercury orbiter using water as reaction mass making it very economical.

Front
1 Armor (Advanced Laminate)
2-3 Passenger Seating (12 seats)
4 Cargo (5 tons)
5-6 Fuel Tank (water)
C Control Room

Central
1 Armor (Advanced Laminate)
2-C Fuel Tank (water)

Rear
1 Armor (Advanced Laminate)
2-5 Fuel Tank (water)
6 Nuclear Thermal Rocket (water 1.5G)
0 Not Used

TL 10, dST/HP 30, Hnd/SR 0/4, HT 12, Move 1.5G (2.52 mps), LWt. 100, Load 5, SM 6, Occ 12 SV, dDR 7, M$ 1.72

Time to Mars orbit 240 seconds, 0.3 mps fuel reserve for orbital manouvers. Must refuel in orbit.

Economics: $100 per passenger trip to/from orbit (one way)

[The Wrathchild]

I've tried my hand at a modified Mudlark-design (for a PbP game). Came out thus:

The Ann McCaffrey
Modified Mudlark-Class USV (Utility Space Vehicle)

Statistics (GURPS Spaceships format):
SM: +7 (Cyllindrical hull, 105' (35 yds) long, 25' (8 yds) diam.)

Components:
Front
[1] Armor: Steel (cDR 3)
[2] Control Room (3 workstations)
[3-5] Habitat (6 people)
[6] Robot Arm
[core] Habitat (1-person atuomated medical bay)

Center
[1] Armor: Steel (cDR 3)
[2-4] Cargo Hold (45 tons)
[5] Habitat (2 people)
[6] Array: Enhanced (Improved Sensor systems)

Rear
[1] Armor: Steel (cDR 3)
[2] Hangar Bay (15 tons)
[3-5] Fuel Tank (45 tons)
[6] Engine Room (1 workstation)
[core] Reaction Engine: Fusion Torch

Habitat Options
Automeds 1

Cost
$12,660,000

Stats:
Crew/Passenger accomodation: 8
Cargo: 45 tons
d-V: 45 mps
Accel: 0.5G
Onboard Comp: C9 Macroframe
Sensor Rating: 8
Refuelling: $900

Design Notes:
The Ann McCaffrey is a modified Mudlark-class USV. It is an unstreamlined cyllindrical hull. It has an improved engine for superior travel times in relation to it's class-mates. It also features improved sensor capabilities. The robotic arm can increase cargo capabilities by functioning as an external cradle. The central computer is a complexity 9 Macroframe, housing a LAI-9 operative system named Helva.

Passenger occupancy has been slightly increased. One cargo space has been converted into a small Hangar Bay, primarily to hold cybershells.

The Ann McCaffrey does not have adequate radiation shielding. Precautions (vacc suits, nanosymbionts, inhabiting a secured cybershell et. al.) must be taken. The environment is Zero-G, and space is borderline cramped. There is a u-boat feel to staying on the ship.

The ship does not have the capability to enter atmospheres. Typically, local transports are utillized for on-/off-loading on atmospheric worlds.

The onboard computer is very roomy, storagewise (1 exabyte I believe the capacity term is). It can house (ie. actively run) quite a few infomorphs of C7 (your typical Ghost) and below (and it can store almost a thousand). Infomorphs can be transferred wirelessly from ship to surface, if needed.

The Ann McCaffrey was obtained through contacts in Duncanite space, purchased and modified with funds acquired from the salvage of the Shoemaker (see backstory section for details).

[thtraveller]

Originally Posted by The Wrathchild

[6] Robot Arm

That's a quarter of the ship cost.

[core] Reaction Engine: Fusion Torch

That is a superscience drive. Is this for a non-TS game? A fusion rocket would be more suitable for TS.

I am confused over the stats. You give dV and accel as per a hydrogen torch but fuel cost as water.

d-V: 45 mps

TL10 Hydrogen or TL11 Water figure. About 60% of the Mudlark's total dV of 75 mps.

Accel: 0.5G

For a hydrogen torch. 1.5G for a water torch. Significantly more than the Mudlark.

Refuelling: $900

Water.

[Phil Masters]

Originally Posted by The Wrathchild

The Ann McCaffrey

"The good news is, there's a spaceship named after you. The bad news is, they got your name wrong."

Originally Posted by The Wrathchild

[core] Reaction Engine: Fusion Torch

No can do. Fusion Torch requires a [rear] location, and [rear] explicitly excludes [core].

Originally Posted by thtraveller

That's a quarter of the ship cost.

I'm really thinking that we really need a "cheap, clunky grabber arm, no use for meca wannabes" option.

[thtraveller]

Osiris Class SDV-9W

The design of the Osiris class SDV is influenced by firepower, combat performance and of course operational efficiency. With the price of Nuclear Pellets at $50K per ton, burning pellets for interplanetary travel is a non-starter, otherwise it would cost M$ 150 per trip in fuel alone. Instead a fusion rocket (water) drive is used for interplanetary trips and a high-thrust Nuclear Pulse drive is used in combat. The use of water for reaction mass also makes out-system and emergency refueling much simpler.

It was politically important to outperform civilian liners on interplanetary journeys so it was fitted with a double size fusion rocket drive.

Combat performance:

The high thrust fusion pulse drive gives it 0.1G of combat performance for over 2 hours.
Forward armor is double thickness to provide additional combat protection.
The forward fixed mount weapon provides a deadly 3GJ particle beam.
The secondary weapons comprise:
4x 300MJ UV lasers,
2x 30MJ Improved RF point defence lasers,
2x Coil gun with XLMP and Kinetic ammo
2x RF Coil gun for engaging smaller targets

Design:
Front
1-2 Armor (Nanocomposite) dDR 100
3 Battery (Major) – Fixed Mount Particle Beam
4 Habitat* (50% allocated to 150 tons steerage cargo)
5-6 Fuel Tank (water)
C Control Room

Central
1 Armor (Nanocomposite) dDR50
2-5 Fuel Tank (water)
6 Battery (Secondary)
C Fusion Reactor (2 Power)

Rear
1 Armor (Nanocomposite) dDR 50
2 External Clamp for 4x 125 ton Naiad class AKVs
3-4 Fusion Rocket (water, 0.03G. 144mps)
5 HT Fusion Pulse Drive (0.1G. 5mps)
6 Fuel Tank (Nuclear pellets, 2.26 hours)

*Habitat: 3 luxury cabin, 8 cabin, 8 bunkrooms, 2 briefing rooms, 2 minifacs, 2 offices, 2 sickbays, 30 unused (steerage cargo).

Options: Chameleon.

TL10, dST/HP 150, Hnd/SR -2/5, HT 13, Move 0.03G (water, 144 mps) 0.1G (NP, 5mps), LWt 10,000, Load 150, SM 10, Occ 54 ASV, dDR 100 F/50SB, Cost M$ 780

Trip Time: Earth-Mars 31.5 days.

[The Wrathchild]

Originally Posted by Phil Masters

"The good news is, there's a spaceship named after you. The bad news is, they got your name wrong."

He. We know. It's deliberate on the part of the players who named her. Don't know exactly why.

No can do. Fusion Torch requires a [rear] location, and [rear] explicitly excludes [core].

Oppsie - easily fixed, though, by swapping with one of the fuel modules.

I've used the otherwise very exellent online construction system at 101010.org, and that seemed to catch such errors - not that one though.

[The Wrathchild]

Originally Posted by thtraveller

That's a quarter of the ship cost.

Yeah, but it's a cool toy, they had the funds, and the function of the ship means that they'll probably need it.

That is a superscience drive. Is this for a non-TS game? A fusion rocket would be more suitable for TS.

ISTR someone commenting somewhere (mr. Pulver, even?) that if there is one spot where a little superscience creeps into the setting it's right here. Fusion torches has been commented on as being represnetative of some designs.

I am confused over the stats. You give dV and accel as per a hydrogen torch but fuel cost as water.

He, me too. Where on earth did I get water from???

[thtraveller]

Originally Posted by The Wrathchild

ISTR someone commenting somewhere (mr. Pulver, even?) that if there is one spot where a little superscience creeps into the setting it's right here. Fusion torches has been commented on as being represnetative of some designs.

Mr Pulver explicitly refers to fusion rockets in post 10 on this very thread: http://forums.sjgames.com/showpost.p...0&postcount=10