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HB 31
HB 31 photo on sailboatdata.com
HB-31 drawing on sailboatdata.com

Hull Type:  Fin w/spade rudder Rig Type:  Fractional Sloop
LOA:  30.50' / 9.30m LWL:  23.60' / 7.19m
Beam:  10.50' / 3.20m Listed SA:  370 ft2 / 34.37 m2
Draft (max.)  5.60' / 1.71m Draft (min.)  
Displacement:  5500 lbs./ 2495 kgs. Ballast:  2645 lbs. / 1200 kgs.
Sail Area/Disp.1:  19.06 Bal./Disp.:  48.10% Disp./Len.:  186.80
Designer:  Van de Stadt
Builder:  Hunter Boats (UK)
Construction:  FG Bal. type:  
First Built:  1983 Last Built:  1985 # Built:  25
AUXILIARY POWER (orig. equip.)
Make:  Yanmar Model:  2GM
Type:  Diesel HP:  15
RIG AND SAIL PARTICULARS  KEY
I(IG):  33.30' / 10.15m J:  6.50' / 1.98m
P:  37.10' / 11.31m E:  14.10' / 4.30m
PY:   EY:  
ISP:   SPL/TPS:  
SA(Fore.):  108.23 ft2 / 10.05 m2 SA(Main):  261.56 ft2 / 24.30 m2
Sail Area (100% fore+main triangles):   369.78 ft2 / 34.35 m2
Sail Area/Disp.2:  19.04 Est. Forestay Length.:  33.93' / 10.34m
BUILDERS (past & present)
More about & boats built by:   Hunter Boats Ltd.
DESIGNER
More about & boats designed by:   E. G. Van de Stadt
RELATED LINKS
  Hunter Association (UK)  www.hunterassociation.org.uk
  Half Ton Class  sailboatdata.com/view_url.asp?id=661
NOTES
IOR 1/2 ton. Another version was the FORMULA 31.
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