B-31 (BOSTROM)
Masthead Sloop
• Fin with rudder on skeg
• Built 1973–1988
Dimensions
- LOA
- 30.64 ft
- LWL
- 25.98 ft
- Beam
- 9.06 ft
- Max Draft
- 5.91 ft
- Displacement
- 7,782 lbs
- Ballast
- 3,748 lbs
Performance Ratios
-
Capsize Ratio ⓘ
-
1.83
(offshore safe)
-
SA/D Ratio ⓘ
- 15.1
-
D/L Ratio ⓘ
- 198
- Ballast Ratio ⓘ
-
48.2%
Sail Plan
- Sail Area
- 370 sq ft
- I
- 37.4 ft
- J
- 11.98 ft
- P
- 31.82 ft
- E
- 9.19 ft
Construction
- Hull Type
- Fin with rudder on skeg
- Rig Type
- Masthead Sloop
- Hull Material
- FG
- Ballast Type
- Iron
Production
- First Built
- 1973
- Last Built
- 1988
- Number Built
- 1000
Engine & Accommodations
- Engine Make
- Yanmar
- Power
- 8 hp
- Engine Type
- Diesel
Notes: Derived from the earlier Bostrum designed MARKAT 30. Also known as BOSTRUM 31. Most were sold as bare hulls or kits.