Ilona Tuulikki — ORC Rating

GPH

726.9

OSN

704.9

LOA

9.345 m

Displacement

3745 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5736

Medium

0.7642

High

0.8702

Triple Offshore

Low

0.7287

Medium

0.9288

High

1.0256

Boat Specifications

Dimensions

Length overall: 9.345 m
Beam: 2.68 m
Draft: 1.69 m
Displacement: 3745 kg
Crew weight: 370 kg
Wetted surface: 17.93 m²

Sails

Mainsail: 17.83 m²
Genoa: 28.87 m²
Spinnaker: 59.56 m²
Asymmetric spinnaker: 0 m²

Design

Type: IW 31
Builder: IW Varvet
Designer: Sparkman&Stephens
Year built: 1975
Stability index: 126.4

Velocity Prediction

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into WX Navigator or compatible navigation software.

6,42.3,4.137198,52,4.61,60,4.81,75,4.93,90,4.82,110,4.83,120,4.69,135,4.28,146.9,3.807961,150,3.68
8,40.5,4.800068,52,5.36,60,5.55,75,5.67,90,5.62,110,5.76,120,5.65,135,5.24,150,4.65,151.4,4.590066
10,39.4,5.241134,52,5.81,60,5.97,75,6.1,90,6.13,110,6.28,120,6.22,135,5.96,150,5.44,154.1,5.269256
12,39,5.494463,52,6.06,60,6.21,75,6.35,90,6.38,110,6.59,120,6.57,135,6.38,150,6.03,161.3,5.658722
14,38.8,5.607323,52,6.18,60,6.34,75,6.52,90,6.58,110,6.82,120,6.85,135,6.7,150,6.41,174.8,5.914341
16,38.7,5.663542,52,6.24,60,6.41,75,6.63,90,6.74,110,6.99,120,7.09,135,6.99,150,6.7,178.1,6.283455
20,38.8,5.735637,52,6.3,60,6.47,75,6.75,90,6.98,110,7.22,120,7.5,135,7.53,150,7.23,179,6.83104

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.61	4.81	4.93	4.82	4.83	4.69	4.28	3.68
8	5.36	5.55	5.67	5.62	5.76	5.65	5.24	4.65
10	5.81	5.97	6.1	6.13	6.28	6.22	5.96	5.44
12	6.06	6.21	6.35	6.38	6.59	6.57	6.38	6.03
14	6.18	6.34	6.52	6.58	6.82	6.85	6.7	6.41
16	6.24	6.41	6.63	6.74	6.99	7.09	6.99	6.7
20	6.3	6.47	6.75	6.98	7.22	7.5	7.53	7.23

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.3°	3.06	146.9°	3.19
8	40.5°	3.65	151.4°	4.03
10	39.4°	4.05	154.1°	4.74
12	39°	4.27	161.3°	5.36
14	38.8°	4.37	174.8°	5.89
16	38.7°	4.42	178.1°	6.28
20	38.8°	4.47	179°	6.83

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