Sailboat Specifications
DefinitionsHull Type: | Fin with rudder on skeg |
Rigging Type: | Masthead Sloop |
LOA: | 9.24 m |
LWL: | 6.71 m |
S.A. (reported): | 33.17 m² |
Beam: | 2.69 m |
Displacement: | 3,538 kg |
Ballast: | 1,542 kg |
Max Draft: | 1.65 m |
Construction: | FG |
Ballast Type: | Iron |
First Built: | 1968 |
Last Built: | 1985 |
# Built: | 350 |
Builder: | IW-Varvet |
Designer: | Sparkman & Stephens |
Auxiliary Power/Tanks (orig. equip.)
Make: | Volvo Penta |
Model: | MD18 |
Type: | Diesel |
HP: | 10 |
Sailboat Calculations
DefinitionsS.A. / Displ.: | 14.57 |
Bal. / Displ.: | 43.59 |
Disp: / Len: | 327.02 |
Comfort Ratio: | 27.03 |
Capsize Screening Formula: | 1.78 |
S#: | 1.38 |
Hull Speed: | 6.29 kn |
Pounds/Inch Immersion: | 694.11 pounds/inch |
Rig and Sail Particulars
HELPI: | 11.20 m |
J: | 3.48 m |
P: | 9.60 m |
E: | 2.85 m |
S.A. Fore: | 19.49 m² |
S.A. Main: | 13.68 m² |
S.A. Total (100% Fore + Main Triangles): | 33.17 m² |
S.A./Displ. (calc.): | 14.57 |
Est. Forestay Length: | 11.73 m |
Sailboat Links
Designers: | Sparkman & Stephens |
Builders: | IW-Varvet (SWE) |
Associations: | Half Ton Class |
IW-31 owners (in German) | |
Related Sailboats: | SHE 31 |
Download Boat Record: |
Notes
Based on RORC/IOR 1/2 ton proto.. S&S design #1899C. Similar to the SHE 31 by South Hants Engineering (UK).
MK I (1968 – 1972): small stern, 'dinette' layout.
MK II (1972 – 1980): larger stern, new deck, different wood trim.
MK III (1980 – 1985): aluminium toe rail (instead of Teak), glass hatch, different hardware.
Thanks to 'little wings' for providing additional information.
Most detailed information can be found at: www.iw-31.de (in German)
MK I (1968 – 1972): small stern, 'dinette' layout.
MK II (1972 – 1980): larger stern, new deck, different wood trim.
MK III (1980 – 1985): aluminium toe rail (instead of Teak), glass hatch, different hardware.
Thanks to 'little wings' for providing additional information.
Most detailed information can be found at: www.iw-31.de (in German)
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