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Sailboat Guide

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Sailboat

Southern Cross 31

1975
Designer
Thomas Gillmer
Builder
C. E. Ryder
Hull Type
Long keel w/trans. hung rudder
Construction
FG

Dimensions

Length Overall
31.00 ft / 9.45 m
Waterline Length
25.00 ft / 7.62 m
Beam
9.50 ft / 2.90 m
Draft
4.50 ft / 1.37 m
Displacement
13,600 lb / 6,169 kg
Ballast
4,180 lb / 1,896 kg
Ballast Type
?
drawing

Rig and Sails

Type
Cutter
Reported Sail Area
496.00 ft2 / 46.08 m2
Total Sail Area
495.50 ft2 / 46.03 m2
Mainsail
Sail Area
212.63 ft2 / 19.75 m2
P
31.50 ft / 9.60 m
E
13.50 ft / 4.11 m
Mast Height
Foresail
Sail Area
282.88 ft2 / 26.28 m2
I
36.50 ft / 11.13 m
J
15.50 ft / 4.72 m
Est. Forestay Len.
39.65 ft / 12.09 m
Mizzen
PY
EY

Auxilary Power

Make
?
Model
?
HP
?
Type
?
Fuel Capacity
?

Accomodations

Water Capacity
?

Calculations

Hull Speed
6.7 knots
Sail Area/Displacement
13.93
under powered
Ballast/Displacement
30.74
less stiff, less powerful
Displacement/Length
388.57
ultraheavy
Comfort Ratio
38.83
moderate bluewater cruising boat
Capsize Screening
1.59
better suited for ocean passages

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