Seawanhaka One-Design (S&S)

1939
Designer
Sparkman & Stephens
Builder
Nevins Inc.
Associations
?
# Built
?
Hull Type
Fin Keel
Construction
Wood

Dimensions

Length Overall
31 0 / 9.5 m
Waterline Length
20 11 / 6.4 m
Beam
6 7 / 2 m
Draft
4 5 / 1.4 m
Displacement
7,000 lbs / 3,175 kg
Ballast
2,850 lbs / 1,293 kg (Lead)
drawing

Rig and Sails

Type
Fractional Sloop
Reported Sail Area
357 ft2 / 33.2 m2
Total Sail Area
378 ft2 / 35.1 m2
Mainsail
Sail Area
245.1 ft2 / 22.8 m2
P
33 9 / 10.3 m
E
14 6 / 4.4 m
Mast Height
?
Foresail
Sail Area
133 ft2 / 12.4 m2
I
27 11 / 8.5 m
J
9 6 / 2.9 m
Forestay Length
29 6 / 9 m

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?

Calculations

Hull Speed
6.14 knots
Sail Area/Displacement
15.61
under powered
Ballast/Displacement
40.71
stiffer, more powerful
Displacement/Length
337.44
heavy
Comfort Ratio
36.41
moderate bluewater cruising boat
Capsize Screening
1.38
better suited for ocean passages

Notes

First 9 boats were commissioned by the Seawanhaka Corinthian YC. (Long Island NY, USA)
Raced as a class into the late 1950’s.


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