Brothership — ORC Rating

GPH

637

OSN

617.8

LOA

10.033 m

Displacement

3844 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6304

Medium

0.8672

High

1.0049

Triple Offshore

Low

0.8167

Medium

1.0653

High

1.2049

Boat Specifications

Dimensions

Length overall: 10.033 m
Beam: 3.35 m
Draft: 1.99 m
Displacement: 3844 kg
Crew weight: 550 kg
Wetted surface: 23.35 m²

Sails

Mainsail: 33.33 m²
Genoa: 22.8 m²
Spinnaker: 69.88 m²
Asymmetric spinnaker: 0 m²

Design

Type: Dufour 334
Builder: Dufour
Designer: Jacques Fauroux
Year built: 1997

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.

6,42.8,4.538455,52,5.09,60,5.39,75,5.61,90,5.59,110,5.6,120,5.42,135,4.88,145,4.297127,150,4.06
8,41.1,5.347924,52,6.03,60,6.32,75,6.54,90,6.64,110,6.71,120,6.55,135,5.99,149,5.191519,150,5.13
10,40.5,6.0494,52,6.67,60,6.86,75,7.01,90,7.16,110,7.26,120,7.16,135,6.82,150,6.09,151,6.025476
12,38.2,6.311582,52,6.98,60,7.14,75,7.3,90,7.43,110,7.7,120,7.61,135,7.29,150,6.84,158,6.492779
14,37.5,6.415805,52,7.11,60,7.31,75,7.56,90,7.64,110,8.15,120,8.12,135,7.72,150,7.27,180,6.65
16,37.5,6.491433,52,7.17,60,7.39,75,7.77,90,7.97,110,8.47,120,8.64,135,8.24,150,7.67,180,7.12
20,37.5,6.541852,52,7.21,60,7.44,75,7.96,90,8.5,110,8.98,120,9.52,135,9.48,150,8.65,180,7.92

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.09	5.39	5.61	5.59	5.6	5.42	4.88	4.06
8	6.03	6.32	6.54	6.64	6.71	6.55	5.99	5.13
10	6.67	6.86	7.01	7.16	7.26	7.16	6.82	6.09
12	6.98	7.14	7.3	7.43	7.7	7.61	7.29	6.84
14	7.11	7.31	7.56	7.64	8.15	8.12	7.72	7.27
16	7.17	7.39	7.77	7.97	8.47	8.64	8.24	7.67
20	7.21	7.44	7.96	8.5	8.98	9.52	9.48	8.65

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.33	145°	3.52
8	41.1°	4.03	149°	4.45
10	40.5°	4.6	151°	5.27
12	38.2°	4.96	158°	6.02
14	37.5°	5.09	180°	6.65
16	37.5°	5.15	180°	7.12
20	37.5°	5.19	180°	7.92

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