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 |