HB 31
Fractional Sloop • Fin w/spade rudder • Built 1983–1985
Dimensions
- LOA
- 30.5 ft
- LWL
- 23.6 ft
- Beam
- 10.5 ft
- Max Draft
- 5.6 ft
- Displacement
- 5,500 lbs
- Ballast
- 2,645 lbs
Performance Ratios
- Capsize Ratio ⓘ
- 2.38 (use caution offshore)
- SA/D Ratio ⓘ
- 19.0
- D/L Ratio ⓘ
- 187
- Ballast Ratio ⓘ
- 48.1%
Sail Plan
- Sail Area
- 370 sq ft
- I
- 33.3 ft
- J
- 6.5 ft
- P
- 37.1 ft
- E
- 14.1 ft
Construction
- Hull Type
- Fin w/spade rudder
- Rig Type
- Fractional Sloop
- Hull Material
- FG
- Ballast Type
- —
Production
- First Built
- 1983
- Last Built
- 1985
- Number Built
- 25
Engine & Accommodations
- Engine Make
- Yanmar
- Engine Model
- 2GM
- Power
- 15 hp
- Engine Type
- Diesel
Notes: IOR 1/2 ton. Another version was the FORMULA 31.
Designer
- E. G. Van de Stadt (1910–1999)
Builder
- Hunter Boats Ltd. (UK) (1969–2003)