Bostrom 31 MKII

1977 — 1984
Designer
Bruno Boström
Builders
?
Associations
?
# Built
?
Hull Type
Fin with rudder on skeg
Construction
FG

Dimensions

Length Overall
30 7 / 9.3 m
Waterline Length
25 11 / 7.9 m
Beam
9 0 / 2.8 m
Draft
5 10 / 1.8 m
Displacement
7,280 lbs / 3,300 kg
Ballast
3,640 lbs / 1,650 kg
drawing

Rig and Sails

Type
Masthead Sloop
Reported Sail Area
370 ft2 / 34.4 m2
Total Sail Area
370.3 ft2 / 34.4 m2
Mainsail
Sail Area
146.2 ft2 / 13.6 m2
P
31 9 / 9.7 m
E
9 2 / 2.8 m
Mast Height
?
Foresail
Sail Area
224 ft2 / 20.8 m2
I
37 4 / 11.4 m
J
11 11 / 3.7 m
Forestay Length
39 3 / 12 m

Auxilary Power

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

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?

Calculations

Hull Speed
6.83 knots
Sail Area/Displacement
15.77
under powered
Ballast/Displacement
50.01
stiffer, more powerful
Displacement/Length
185.21
light
Comfort Ratio
21.67
coastal cruiser
Capsize Screening
1.87
better suited for ocean passages

Notes

Same hull as BOSTROM 31 but with more freeboard and new deck.


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