Interstellar Wars Ships Using Spaceships

[JMason]

So I decided to give a go at translating the ships from Interstellar Wars to the GURPS Spaceships system. I’m using most of PK’s house rules, except I’ve decided just 1 tank per parsec.

Here are the first couple (I wanted to get some fighters done so I can try out the combat system).


Imperial Missile Fighter $10M

This ship is pretty much armor/engines/launchers. With 33 dDR and 6G acceleration, something had to give in order to make this work with Spaceships design system.

I decided to allow engines in non-rear sections, putting 2 in the center and 2 in the rear. The ship is suppose to be a flattened sphere anyway, so why not? Also, I dropped armor down to 28 dDR (using Nanocomposite) and speed to 4G.

Front Hull
[1-4]	Armor, Nanocomposite (dDR 28) 2M
[5!]	Weapons, Med. Battery (20 cm Fixed Launcher x2, 1.5T) 400k
[6]	Control Room 200k

Central Hull
[1-4]	Armor, Nanocomposite (dDR 28) 2M
[5-6!!]	Reactionless Engines (2G) 0.2M
[core]	Fusion Reactor (2 power) 1M

Rear Hull
[1-4]	Armor, Nanocomposite (dDR 28) 2M
[5-6!!]	Reactionless Engines (2G) 0.2M
[core]	Fusion Reactor (2 power) 1M

Features: Stealth Hull (0.5), Winged (0.5)

Piloting/TL10 (High-Performance Spacecraft)
TL    dST/HP    HT    Hnd/SR    Move    SM    LWt         dDR    Occ
10      30     12      0/4     4G/c    +6    100 tons    28     2

Terran Light Fighter $7M

This is a little more reasonable. I used cheaper armor, as this seems likely for the Terran ships (Nanocomposite seems a bit much anyway). Speed is more important to get in/out of laser range, so not the issue was to get enough power to the engines.

Front Hull
[1-3]	Armor, Advanced Metallic Laminate (dDR 15) 0.6M
[4!]	Weapons, Med. Battery (Fixed Laser x2, 1.5T) 400k
[5]	Control Room 200k
[6]	Fusion Reactor (2 power) 1M

Central Hull
[1-3]	Armor, Advanced Metallic Laminate (dDR 15) 0.6M
[4-6!!!] Reactionless Engines (3G) 0.3M
[core]	Fusion Reactor (2 power) 1M

Rear Hull
[1-3]	Armor, Advanced Metallic Laminate (dDR 15) 0.6M
[4-6!!!] Reactionless Engines (3G) 0.3M
[core]	Fusion Reactor (2 power) 1M

Features: Stealth Hull (0.5), Winged (0.5)

Piloting/TL10 (High-Performance Spacecraft)
TL    dST/HP    HT    Hnd/SR    Move    SM    LWt         dDR    Occ
10      30     12      0/4     6G/c    +6    100 tons    15     2

That's about it for now. Tell me what y'all think.

[JMason]

And a couple more.

Standard Lifeboat $3.4M

The lifeboat has the opposite problem of the fighters. There is just not much need for all 20 systems. I decided to just scale up everything so it can hold more persons and cargo. I’m thinking though that it might work better to scale this down to a SM+5 ship, but then I’ll have to allow for half cabin habitats to fit the low births.

I treat Low Berths as stasis pods, but they can house 2 persons (4 in an emergency) per unit.

Front Hull
[1-3]	Armor, Advanced Metallic Laminate (dDR 15) 0.6M
[4-6]	Habitat (12 Low Berths) 400k
[core]	Control Room 200k

Central Hull
[1-3]	Armor, Advanced Metallic Laminate (dDR 15) 0.6M
[4-6]	Habitat (12 Low Berths) 400k
[core]	Fusion Reactor (2 power) 1M

Rear Hull
[1-3]	Armor, Advanced Metallic Laminate (dDR 15) 0.6M
[4-6]	15 tons
[5-6!!]	Reactionless Engines (2G) 0.2M

Features: Winged (0.5)

Piloting/TL10 (High-Performance Spacecraft)
TL	dST/HP	HT	Hnd/SR	Move	SM	LWt	dDR	Occ
10	30	12	0/4	2G / c	+6	100T	15	2

Can hold 48 passengers in low births.

Standard Assault Craft $13.5M

Not too much to say about this one. Most of the systems converted over nicely.

Front Hull
[1-2]	Armor, Nanocomposite (dDR 14) 1M
[3!]	Weapons, Major Battery 600k
[4!]	Weapons, Major Battery 600k
[5-6]	10 tons
[core]	Control Room 200k

Central Hull
[1-2]	Armor, Nanocomposite (dDR 14) 1M
[3!]	Weapons, Major Battery (Turret) 600k
[4-6]	Fusion Reactor (6 power) 3M
[core]	Fusion Reactor (2 power) 1M

Rear Hull
[1-2]	Armor, Nanocomposite (dDR 14) 1M
[3-6!!!!]	Reactionless Engines (4G) 4M

Features: Winged (0.5)

Piloting/TL10 (High-Performance Spacecraft)
TL	dST/HP	HT	Hnd/SR	Move	SM	LWt	dDR	Occ
10	30	12	0/4	4G / c	+6	100T	14	2

[JMason]

Standard Ship’s Boat $ 9.3M

Front Hull
[1-2]	Armor, Metallic Laminate (dDR 10) 300k
[3-6]	Cargo Hold, 60T
[core]	Control Room 600k

Central Hull
[1-2]	Armor, Metallic Laminate (dDR 10) 300k
[3-5]	Passenger Seating (60 seats) 300k
[6]	Cargo Hold, 15T
[core]	Fusion Reactor (2 power) 3M

Rear Hull
[1-2]	Armor, Metallic Laminate (dDR 10) 300k
[3-4]	Cargo Hold, 30T
[5-6!!]	Reactionless Engines (2G) 4M

Features: Winged (0.5)

Piloting/TL10 (High-Performance Spacecraft)
TL	dST/HP	HT	Hnd/SR	Move	SM	LWt	dDR	Occ
10	50	12	-1/5	2G / c	+7	300T	10	63

Cargo Shuttle Variant
Swap out Passenger Seating for 45T more cargo. -300k

Passenger Shuttle Variant
Reduce Cargo to just 15T and make all the rest Passenger Seating. +600k
Just upgrade the armor type to make this an assault lander.

Fuel Skimmer Variant
Drop all passenger and cargo for 10 Fuel Tanks +700k

Mobile Base
Only one Passenger Seating, add 3 Habitats for 1 Lab, 3 Bunkrooms, and 5T steerage) +700k

[Fred Brackin]

Your "Life Boat" is the size of the Space Shuttle and your "Ship's Boat" is as big as a 747. I know Traveller is traditionally goofy that way butt you might be over doing it.

Make your Life Boat SM+5 (or even +4) and your bunkrooms become oversized systems. Then put in multiple layers of much cheaper armor to take up space if you need to.

[JMason]

Originally Posted by Fred Brackin

Your "Life Boat" is the size of the Space Shuttle and your "Ship's Boat" is as big as a 747. I know Traveller is traditionally goofy that way butt you might be over doing it.

Make your Life Boat SM+5 (or even +4) and your bunkrooms become oversized systems. Then put in multiple layers of much cheaper armor to take up space if you need to.

I started creating a smaller life boat, but then changed b/c these were the Size Modifiers that were listed in T:IW.

Are there rules for SM+4 ships? Spaceships 1 only covers down to +5.

[Fred Brackin]

Originally Posted by JMason

I started creating a smaller life boat, but then changed b/c these were the Size Modifiers that were listed in T:IW.

Are there rules for SM+4 ships? Spaceships 1 only covers down to +5.

Spaceships 4 I believe. The progressions downward are quite logical and the oversized systems rule is in Spaceships 1.

By default Traveler ships are simply huge. By modern standards my 1000 square foot house is small but in Traveller it's 20 dTons and would be a hull for something like a fighter. The Suleiman-class scout Ship is of course 5x the size of my house.

[JMason]

Alright, I scaled down the Lifeboat to SM+5. I started to do 4, but that felt a bit too small. This version actually feels like a better fit for the the stats in TIW

Standard Lifeboat (take 2)
$1.26M (8.2M)

Front Hull
[1-3]	Armor, Advanced Metallic Laminate (dDR 9) 180k
[4-5]	Control Room 120k
[6]	Cargo 1.5T

Central Hull
[1-3]	Armor, Advanced Metallic Laminate (dDR 9) 180k
[4]	Cargo 1.5T
[5-6]	Habitat (4 Low births) 60k
[core]	Habitat (2 Low births) 30k

Rear Hull
[1-3]	Armor, Advanced Metallic Laminate (dDR 9) 180k
[5-6!!]	Reactionless Engines (2G) 60k
[core]	Fusion Reactor (2 power) 300k

Features: Winged (150k)

Piloting/TL10 (High-Performance Spacecraft)
TL	dST/HP	HT	Hnd/SR	Move	SM	LWt	dDR	Occ
10	20	12	0/4	2G / c	+5	30T	9	2

Can hold 24 passengers in low births.

[JMason]

So I reduced the ship's boat down to SM 6.

Standard Ship’s Boat (take 2)
$ 2.74M (17M)

Front Hull
[1]	Armor, Adv. Metallic Laminate (dDR 5) 200k
[2-5]	Passenger Seating (24) 120k
[6]	Cargo 5 sTons
[core]	Control Room 200k

Central Hull
[1]	Armor, Adv. Metallic Laminate (dDR 5) 200k
[2-5]	Passenger Seating (24) 120k
[6]	Cargo 5 sTons
[core]	Fusion Reactor (2 power) 1M

Rear Hull
[1]	Armor, Adv. Metallic Laminate (dDR 5) 200k
[3-4]	Cargo Hold 10 sTons
[5-6!!]	Reactionless Engines (2G) 200k

Features: Winged (0.5)

Piloting/TL10 (High-Performance Spacecraft)
TL	dST/HP	HT	Hnd/SR	Move	SM	LWt	dDR	Occ
10	30	12	0/4	2G / c	+6	100t	5	62

Cargo Shuttle Variant
Swap out Passenger Seating for 50 tons more cargo. -300k

Passenger Shuttle Variant
Reduce Cargo to just 5T and make all the rest Passenger Seating. +90k
Instead of adding seats, change systems to armor for an assault lander.

Fuel Skimmer Variant
Drop all passenger and cargo for 8 Fuel Tanks +240k

Mobile Base
Only 2 Passenger Seating, add 2 Habitats for 1 Lab, 3 Bunk Rooms, all the rest is cargo +420k

[JMason]

Alright, I'm still working on these when I have some time. I realize that all of these should probably have Gravitic Compensators, so I'll need to fix that... I'm sure there are other things I've missed.

Standard Interplanetary Shuttle
$ 12.5M (21M)

Front Hull
[1-2]	Armor, Adv. Metallic Laminate (dDR 14) 1.2M
[3-6]	Habitat (8 Cabins) 1.2M
[core]	Control Room 600k

Central Hull
[1-2]	Armor, Adv. Metallic Laminate (dDR 14) 1.2M
[3]	Medium Battery (2 hardpoints, 5t) 1.5M
[4-6]	Habitat (6 Cabins) 0.9M
[core]	Fusion Reactor (2 power) 1M

Rear Hull
[1-2]	Armor, Adv. Metallic Laminate (dDR 14) 1.2M
[3-5]	Cargo Hold 45T
[6!]	Reactionless Engines (1G) 200k

Features: Artificial Gravity 1M, Gravitic Compensators 1M, Winged (1.5M)

Piloting/TL10 (High-Performance Spacecraft)
TL	dST/HP	HT	Hnd/SR	Move	SM	LWt	dDR	Occ
10	50	12	-1/5	1G / c	+7	300t	14	3

Crockett-Class Picket Ship

Another ship with high speed and armor! I reduced armor down to 30 (using Nanocomposite), and speed down to 3G. There are fewer control stations than I’d like. Based on the TIW version, there should probably be a second control room to handle the 10 persons that are suppose to be on this ship.

$108.2M (140M)

Front Hull
[1-2]	Armor, Nanocomposite (dDR 30) 10M
[3]	Tactical Array 10M
[4]	Habitat (6 cabins) 1M
[5-6]	Fuel Tanks 600K
[core]	Control Room 2M

Central Hull
[1-2]	Armor, Nanocomposite (dDR 30) 10M
[3!]	Medium Battery (Beam, Launcher, Sandcaster) 6M
[4!]	Medium Battery (Beam, Launcher, Sandcaster) 6M
[5-6]	Fusion Reactor (4 power) 20M
[core!]	Jump-2 Drive 20M

Rear Hull
[1-2]	Armor, Nanocomposite (dDR 30) 10M
[3]	Engine Room 300K
[3-6!!!]	Reactionless Engines (3G) 3M

Features: Artificial Gravity 1M, Gravitic Compensators 1M, Standard fuel processor 300K, Winged (5M), Stealth (2M)

Piloting/TL10 (High-Performance Spacecraft)
TL	dST/HP	HT	Hnd/SR	Move	SM	LWt	dDR	Occ
10	70	13	-1/5	4G / c	+8	1000t	30	3

The Iiken-Class Scout/Courier is suppose to have less armor, speed, and weapons than the Crockett. But since I had to reduce the Crockett down, there isn’t much room for the minor granularity between these two ships. Basically, you can just remove 2 cabins to add the cargo space for the air/raft.

[JMason]

With so many ships rated at 6G ... and all ships having some armor, I'm starting to think that there needs to be a better performing engine.

I'm already using PK's tweak to have standard Reactionless Engines perform like the "hot" versions (1G instead of 0.5). Perhaps there should be a 2G upgrade. This would allow some of those 6G with only 3 systems (5 counting the 2 Power Plants needed to power them).