HG-compatible Book 2 type ship construction rules.
Note: Only changes to original rules listed.
Ship Design and Construction
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REQUIRED STARSHIP COMPONENTS
[First three paragraphs unchanged].
Hulls vary in their requirements for drive and power plant based on tonnage.
Any specific drive will be less efficient as the tonnage it must drive
increases. The drive potential tables lists up to 24 standard drive types,
identified by the letters A through Z (omitting I and O to avoid confusion
with the numerals 1 and 0). Also listed are various tonnage levels for hulls;
any tonnage which exceeds a listed level should be read as the next higher
level. Correlating hull size with drive letter indicates drive potential.
For maneuver drives, this potential is the Gs of acceleration available. For
jump drives, the potential is the jump number (Jn) or jump range in parsecs.
For power plants, it is power plant rating (Pn). For instance, a 200-ton hull
equipped with maneuver drive-B can produce 1-G acceleration; an 800-ton hull
equipped with jump drive-K can produce jump-2.
Shipyards on high-population worlds have a number of standard designs for
hulls and components available. Such standard designs can be produced
faster and at lower costs than custom designs.
Jump drive, maneuver drive and power plant tables.
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Jump Maneuver Power
Drive Drive Plant
Mass MCr Mass MCr Mass MCr
A 2 8 2 1 3 9
B 3 12 4 2 6 18
C 4 16 5 2.5 9 27
D 6 24 8 4 12 36
E 8 32 10 5 18 54
F 12 48 12 6 24 72
G 16 64 16 8 30 90
H 18 72 20 10 36 108
J 20 80 30 15 48 144
K 24 96 32 16 54 162
L 30 120 40 20 60 180
M 32 128 48 24 72 216
N 40 160 50 25 90 270
P 60 240 60 30 120 360
Q 80 320 64 32 150 450
R 90 360 80 40 180 540
S 100 400 100 50 240 720
T 120 480 150 75 270 810
U 150 600 160 80 300 900
V 160 640 200 100 360 1080
W 200 800 240 120 450 1350
X - - 250 125 - -
Y - - 320 160 - -
Z - - 400 200 - -
The following restrictions apply based on TL: At TL 9 and 10, only jump-1
drives may be built; at TL 11, only jump-1 and jump-2 drives may be built;
at TL 12, only jump-1 through jump-3 may be built; at TL 13, only jump-1
through jump-4 may be built; at TL 14, only jump-1 through jump-5 may be
built; at TL 15, jump-1 through jump-6 may be built.
At TL 13 and 14, power plant tonnage and cost are reduced by one third; at
TL 15, they're reduced by another third (E.g. a power plant-A masses 2 tons
and costs MCr6 at TL 13 and 14; it masses 1 T and costs MCr3 at TL 15).
Jump Drive potential
Hull A B C D E F G H J K L M N P Q R S T U V W
tons
100 1 2 3 - - - - - - - - - - - - - - - - - -
200 - - 1 2 3 - - - - - - - - - - - - - - - -
400 - - - - 1 2 3 - - - - - - - - - - - - - -
600 - - - - - 1 1 2 2 3 - - - - - - - - - - -
800 - - - - - - 1 1 1 2 2 3 - - - - - - - - -
1000 - - - - - - - - 1 1 2 2 3 - - - - - - - -
2000 - - - - - - - - - - - - 1 2 3 - - - - - -
3000 - - - - - - - - - - - - - 1 1 2 2 3 - - -
4000 - - - - - - - - - - - - - - 1 1 1 2 2 3 -
5000 - - - - - - - - - - - - - - - - 1 1 2 2 3
Note: A jump drive of high potential installed in a big hull will perform at
the indicated lower level. The reverse is not true. A jump-1 drive installed
in a smaller ship will still only perform jump-1.
Maneuver Drive potential
Hull A B C D E F G H J K L M N P Q R S T U V W X Y Z
tons
100 1 1 2 3 3 4 5 6 - - - - - - - - - - - - - - - -
200 - 1 1 1 2 2 3 3 4 4 5 6 - - - - - - - - - - - -
400 - - - 1 1 1 1 2 2 3 3 4 4 5 5 6 - - - - - - - -
600 - - - - - 1 1 1 2 2 2 3 3 3 3 4 5 6 - - - - - -
800 - - - - - - 1 1 1 1 2 2 2 2 3 3 4 6 - - - - - -
1000 - - - - - - - 1 1 1 1 1 2 2 2 3 3 5 5 5 6 - - -
2000 - - - - - - - - - - 1 1 1 1 1 1 2 2 3 3 4 4 5 6
3000 - - - - - - - - - - - - - 1 1 1 1 2 2 2 3 3 3 4
4000 - - - - - - - - - - - - - - - 1 1 1 1 2 2 2 3 3
5000 - - - - - - - - - - - - - - - - 1 1 1 1 1 2 2 3
Note that some drives are bigger than needed to produce the indicated effect.
If you want a drive that fits perfectly, you may have to have it custom-made.
Power Plant potential
Hull A B C D E F G H J K L M N P Q R S T U V W
tons
100 1 2 3 4 6 8 10 12 16 18 20 - - - - - - - - - -
200 - 1 1 2 3 4 5 6 8 9 10 12 15 20 - - - - - - -
400 - - - 1 1 2 2 3 4 4 5 6 7 10 12 15 20 - - - -
600 - - - - 1 1 1 2 2 3 3 4 5 6 8 10 13 15 16 20 -
800 - - - - - 1 1 1 2 2 2 3 3 5 6 7 10 11 12 15 18
1000 - - - - - - 1 1 1 1 2 2 3 4 5 6 8 9 10 12 15
2000 - - - - - - - - - - 1 1 1 2 2 3 4 4 5 6 7
3000 - - - - - - - - - - - - 1 1 1 2 2 3 3 4 5
4000 - - - - - - - - - - - - - 1 1 1 2 2 2 3 3
5000 - - - - - - - - - - - - - - 1 1 1 1 2 2 3
The power plant must be able to produce an effect at least equal to the jump
drive or the maneuver drive, whichever is the highest, e.g. a ship with 2G
and jump-1 needs a power plant with an effect of 2 or more, and so does a
ship with 1G and jump-2.
If you want to be able to use the maneuver drive and energy weapons at the
same time, the power plant must have a higher effect than the maneuver drive
level. (For every level the power plant exceeds the maneuver drive, you get
power points equivalent to the ship's tonnage in hundreds, e.g. a 400 T ship
gets 4 excess power points for every extra level).
Note that some plants are bigger than needed to produce the indicated effect.
If you want a plant that fits perfectly, you may have to have it custom-made.