Re: 3rdEd SJ Ship Size rules

In <URL:news:local.spelljam> on Tue 09 May, Dreamer wrote:
> These are the rules that I used to calculate the Size stat for
> 3rdEd SJ ship's hulls.  They are based on the standard 3rdEd
> object size rules.

The problem with the standard 3rdEd object size rules is that at
the point where they start becoming useful for SJ: Huge,
Gargantuan, and Colossal; is where each step stops giving a -2
AC.

Using -2 per step seems to be the pattern that 3rdEd combat uses
elsewhere, so I thought that it made sense to extend the object
sizes on this basis, and subdivide Gargantuan into two, so that
you get steps of -2 throughout.

I only came to consider doing this after trying to use the
standard sizes for ship hulls, and finding that only the Flitter
was Huge, and almost all the others were Gargantuan or Colossal.

It didn't seem to make sense there being only two sizes for
almost all ships, with AC Modifiers of -4 and -8.

Comments?


> Using these rules it will be possible to calculate a Size stat for
> ship hulls for which just dimensions exist, and then use this to
> help calculate the ship's AC.
> 
> The table can be reduced to a (given) formulae, which could be
> used in ship conversion macro in Excel, or say a 'C' program.
> 
> 
> Spelljamming Ship Size - 09/May/06
> 
>         Base     Limit    AC
> Size   KL x BL  KL x BL   Mod
> Large   10x  4   15x  6    -1
>   1     20x  8   30x 12    -2
>   2     40x 16   50x 20    -4
> 
>   3     60x 24   70x 28    -6
>   4     80x 32   90x 36    -8
>   5    100x 40  110x 44   -10
> 
>   6    120x 48  130x 52   -12
>   7    140x 56  150x 60   -14
>   8    160x 64  170x 68   -16
> 
>   9    180x 72  190x 76   -18
>  10    200x 80  210x 84   -20
>  12    240x 96  250x100   -24
> 
>  14    280x112  290x116   -28
>  16    320x128  330x132   -32
>  20    400x160  410x164   -40
> 
>  24    480x192  490x202   -48
>  32    640x256  650x260   -64
> 
> Base, Limit: measured in feet
> Size x 20 = KL, Size x 8 = BL, Size x 2 = AC Modifier
> Keel Limit = Keel Base + 10, Beam Limit = Beam Base + 4
> Note: Size 1 is Huge, 2+3 is Gargantuan, 4+ is Colossal
> 
> To convert a ship multiply together the KL and BL (after removing
> any KL which corresponds to a ram) and find the closest Size, for
> which the KL x BL is less than or equal to the Limit KL x BL, and
> greater than the Limit for the previous Size.

This is the ship's hulls with Size and hull point Hardness (and
3rdEd AC):

-----------------------------------------------------------------
3rdEd Spelljamming Ship Hulls - 09/May/06

These are all the ships from CoAS, with details for Mindspider
and Armada added from LotV.

Name           KL   BL  Size  T/HP  Crew    MC  AC  Hard  Ram  SA  Land  Cost
Flitter        20    5    1     1     1      B   7    1    -    -  L+W    10
Longship       75   15    3     4    4/ 4    E   7    -   opt   1  W      10
Mosquito      100   15    3     6    1/ 6    C  10    -    -    -  L+W    15

Caravel        70   20    3    10    8/10    F   6    -    -    1  W      10
Coaster        60   20    3    10    8/10    F   6    -    -    1  W       5
Drakkar       100   20    4    10   20/10    F   8    -    -    1  W      25

Dragonfly     100   20    4    10    3/10    C   7    -    -    1  L      40
Damselfly     100   20    4    10    2/10    D  11    1    -    1  L      50
Dromond       175   15    4    16   10/16    E   6    -    P    3  W      15

Wasp           80   20    4    18    8/18    D   9    -    -    1  L      20
Cog            90   20    4    20   10/20    F   6    -    -    -  W      10
Great Galley  130   20    5    20   15/20    F   8    -    P    3  W      30

Tyrantship    100  100    8    23   15/23    C  15    1    -    -  -     100
Tradesman     120   30    5    25   10/25    D  10    -    -    2  -      15
Sidewheeler   120   25    4    30   20/30    E   8    1    -    -  L?W?   40

Nautiloid     180*  30    5    35   10/35    D  11    -    P    5  W      40
Mindspider     40   15    2?   40    3/40    C  11    1   G+P   3  -     120
Galleon       130   30    5    40   20/40    E   8    -   opt   3  W      50

Squidship     250*  25    5    45   12/45    D  10    -   G/P   3  W      45
Dragonship    150   20    4    45   20/45    D  10    -   opt   3  W      60
Hammership    250   25    6    60   24/60    D   9    -    B    3  W      50

Man-o-War     200   20    5    60   10/60    C   8    1    -    4  -     100
Deathspider   175-  50    7   100   30/100   E  10    1    G    6  -      75
Armada        300   30    7   100   40/100   D  10    1    -   14  -       -

Citadel       250  250   24   300  100/300   E  15    1    B   10  L     100

KL: Keel Length in feet, *= including ram, -= excluding arms
BL: Beam Length in feet
Size: see Size table; if KL includes ram, assume it is a third of the length
T/HP: Tonnage/Hull Points
Crew: minimum/safe in human-equivalents
MC: Maneuverability Class
AC: Armour Class; includes Size modifier
Hard: Hardness of hull material; reduction in hull points damage; -= zero
Ram: opt= Optional, P= Piercing, B= Blunt, G= Grappling, -= None
SA: Standard Armament in large weapons; -= None
Land: L= Land, W= Water, L+W= Land&Water, L?W?= Land 50%/Water 50%, -= Can't
Cost: is in tens of thousands of gold pieces; -= not for sale


Substance   Hardness
Thin Wood      0
Thick Wood     0
Leather        0
Bone           0
Stone          1
Crystal        1
Ceramic        1
Metal*         1
Mithral        1
Adamantite     2

Substance: *= includes Glassteel
Hardness: measured in hull points

-----------------------------------------------------------------

I note that hulls with a Hardness of more than zero are the
substances which are not likely to catch fire, from any normal,
or even standard magical, fire.

Even in an immensely hot fire only Metal is likely to burn; I
don't think that I've ever seen any rules on what it takes to
make Mithral or Adamantite burn (melt, yes, burn, no).

-- 
Dreamer
dreamer@??????.?????.??.uk
http://www.romsys.demon.co.uk/