J-Samu — ORC Rating | RegattaPages

GPH

593.2

OSN

576.1

LOA

12.009 m

Displacement

5660 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.704

Medium

0.9344

High

1.0627

Triple Offshore

Low

0.8998

Medium

1.135

High

1.2529

Boat Specifications

Dimensions

Length overall: 12.009 m
Beam: 3.77 m
Draft: 2.17 m
Displacement: 5660 kg
Crew weight: 525 kg
Wetted surface: 28.38 m²

Sails

Mainsail: 41.2 m²
Genoa: 39.09 m²
Spinnaker: 114.86 m²
Asymmetric spinnaker: 0 m²

Design

Type: J-39
Builder: J-Boats
Designer: R.Johnstone
Year built: 1991

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.

6,42.2,5.156555,52,5.75,60,6.02,75,6.19,90,6.05,110,5.96,120,5.81,135,5.24,141.7,4.867629,150,4.42
8,40,6.017928,52,6.7,60,6.9,75,7.03,90,6.97,110,7.08,120,6.98,135,6.48,147.3,5.75156,150,5.59
10,38.2,6.438831,52,7.15,60,7.32,75,7.46,90,7.46,110,7.62,120,7.6,135,7.29,150,6.6,151.4,6.514933
12,37.1,6.594917,52,7.33,60,7.51,75,7.71,90,7.78,110,7.96,120,8.02,135,7.8,150,7.31,157.2,6.985852
14,36.7,6.697634,52,7.43,60,7.61,75,7.87,90,8.02,110,8.19,120,8.38,135,8.25,150,7.79,167.3,7.196055
16,36.6,6.788592,52,7.5,60,7.69,75,7.98,90,8.22,110,8.4,120,8.7,135,8.7,150,8.22,176.8,7.531744
20,36.5,6.866894,52,7.58,60,7.78,75,8.14,90,8.51,110,8.65,120,9.2,135,9.77,150,9.17,177.7,8.346724
24,37.9,6.881396,52,7.56,60,7.79,75,8.22,90,8.7,110,9.07,120,9.51,135,11.39,150,10.58,174.8,9.268144

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.75	6.02	6.19	6.05	5.96	5.81	5.24	4.42
8	6.7	6.9	7.03	6.97	7.08	6.98	6.48	5.59
10	7.15	7.32	7.46	7.46	7.62	7.6	7.29	6.6
12	7.33	7.51	7.71	7.78	7.96	8.02	7.8	7.31
14	7.43	7.61	7.87	8.02	8.19	8.38	8.25	7.79
16	7.5	7.69	7.98	8.22	8.4	8.7	8.7	8.22
20	7.58	7.78	8.14	8.51	8.65	9.2	9.77	9.17
24	7.56	7.79	8.22	8.7	9.07	9.51	11.39	10.58

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.2°	3.82	141.7°	3.82
8	40°	4.61	147.3°	4.84
10	38.2°	5.06	151.4°	5.72
12	37.1°	5.26	157.2°	6.44
14	36.7°	5.37	167.3°	7.02
16	36.6°	5.45	176.8°	7.52
20	36.5°	5.52	177.7°	8.34
24	37.9°	5.43	174.8°	9.23

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