Nicholson 31

1976 — 1980
Designer
Raymond Wall
Builder
Camper & Nicholson
Associations
Nicholson 31 Association Forum
Nicholson 31 Association
# Built
119
Hull Type
Long keel w/trans. hung rudder
Construction
FG

Dimensions

Length Overall
30 6 / 9.3 m
Waterline Length
24 2 / 7.4 m
Beam
10 2 / 3.1 m
Draft
4 11 / 1.5 m
Displacement
13,010 lbs / 5,899 kg
Ballast
4,800 lbs / 2,177 kg (Lead)
drawing

Rig and Sails

Type
Masthead Sloop
Reported Sail Area
484.1 ft2 / 45 m2
Total Sail Area
483.7 ft2 / 44.9 m2
Mainsail
Sail Area
236.8 ft2 / 22 m2
P
34 10 / 10.6 m
E
13 6 / 4.1 m
Mast Height
?
Foresail
Sail Area
246.9 ft2 / 22.9 m2
I
39 2 / 12 m
J
12 7 / 3.8 m
Forestay Length
41 2 / 12.6 m

Auxilary Power

Make
Yanmar
Model
YS12G
HP
12
Fuel Type
Diesel
Fuel Capacity
21 gal / 79 l

Accomodations

Water Capacity
93 gal / 352 l
Holding Tank Capacity
?
Headroom
?

Calculations

Hull Speed
6.59 knots
Sail Area/Displacement
14.0
under powered
Ballast/Displacement
36.91
less stiff, less powerful
Displacement/Length
411.18
ultraheavy
Comfort Ratio
34.71
moderate bluewater cruising boat
Capsize Screening
1.73
better suited for ocean passages

Notes

The NICHOLSON 31 replaced the NICHOLSON 32, and proved to be nearly as popular.
The folkboat type design appealed to serious long distance cruisers and single-handers.


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