Islander 40

1979
Designer
Doug Peterson
Builder
Islander / Tradewind Yachts
Associations
?
# Built
?
Hull Type
Fin w/spade rudder
Construction
FG w/divinyvell deck

Dimensions

Length Overall
39 6 / 12 m
Waterline Length
30 10 / 9.4 m
Beam
11 10 / 3.6 m
Draft
7 2 / 2.2 m
Displacement
17,000 lbs / 7,711 kg
Ballast
7,700 lbs / 3,493 kg (Lead)
drawing

Rig and Sails

Type
Masthead Sloop
Reported Sail Area
734 ft2 / 68.2 m2
Total Sail Area
734.1 ft2 / 68.2 m2
Mainsail
Sail Area
296.9 ft2 / 27.6 m2
P
47 6 / 14.5 m
E
12 6 / 3.8 m
Mast Height
?
Foresail
Sail Area
437.2 ft2 / 40.6 m2
I
52 11 / 16.2 m
J
16 6 / 5 m
Forestay Length
55 6 / 16.9 m

Auxilary Power

Make
Pathfinder
Model
50MF
HP
42
Fuel Type
Diesel
Fuel Capacity
38 gal / 144 l

Accomodations

Water Capacity
48 gal / 182 l
Holding Tank Capacity
?
Headroom
?

Calculations

Hull Speed
7.44 knots
Sail Area/Displacement
17.76
good performance
Ballast/Displacement
45.29
stiffer, more powerful
Displacement/Length
258.99
moderate
Comfort Ratio
29.05
coastal cruiser
Capsize Screening
1.84
better suited for ocean passages

Notes

Shoal draft ‘Sheel’ keel version also available, usually with a shorter rig.
Draft: 5.16’/1.57m.


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