B 31 bostrom


The B 31 bostrom is a 30.64ft masthead sloop designed by Bruno Boström/Grandinsson and built in fiberglass between 1973 and 1988.

1000 units have been built.

The B 31 bostrom is a light sailboat which is slightly under powered. It is very stable / stiff and has a good righting capability if capsized. It is best suited as a coastal cruiser.

B 31 bostrom for sale elsewhere on the web:

Main features


Model B 31 bostrom
Length 30.64 ft
Beam 9.06 ft
Draft 5.91 ft
Country ??
Estimated price $ 0 ??

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Ratios


Sail area / displ. 15.13
Ballast / displ. 48.16 %
Displ. / length 198.12
Comfort ratio 23.32
Capsize 1.83

Hull


Hull type Monohull fin keel with rudder on skeg
Construction Fiberglass
Waterline length 25.98 ft
Maximum draft 5.91 ft
Displacement 7782 lbs
Ballast 3748 lbs
Hull speed 6.83 knots

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Rigging


Rigging Masthead Sloop
Sail area (100%) 370 sq.ft
Air draft 0 ft ??
Sail area fore 224.03 sq.ft
Sail area main 146.21 sq.ft
I 37.40 ft
J 11.98 ft
P 31.82 ft
E 9.19 ft

Engine


Nb engines 1
Total power 8 HP
Fuel capacity 0 gals

Accommodations


Water capacity 0 gals
Headroom 0 ft
Nb of cabins 0
Nb of berths 0
Nb heads 0

Builder data


Builder ??
Designer Bruno Boström/Grandinsson
First built 1973
Last built 1988
Number built 1000