BRAINSTORM — ORC Rating

GPH

668.4

OSN

648.7

LOA

9.5 m

Displacement

3868 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6868

Medium

0.9293

High

1.0579

Triple Offshore

Low

0.8817

Medium

1.1419

High

1.2674

Boat Specifications

Dimensions

Length overall: 9.5 m
Beam: 3.23 m
Draft: 1.92 m
Displacement: 3868 kg
Crew weight: 400 kg
Wetted surface: 22.35 m²

Sails

Mainsail: 26.51 m²
Genoa: 28.45 m²
Spinnaker: 67.63 m²
Asymmetric spinnaker: 0 m²

Design

Type: FIRST 31.7
Builder: BENETEAU
Designer: FINOT
Year built: 1998

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.

6,42.4,4.360453,52,4.87,60,5.12,75,5.32,90,5.25,110,5.27,120,5.12,135,4.64,146.1,4.120421,150,3.95
8,40.9,5.13327,52,5.78,60,6.05,75,6.25,90,6.28,110,6.37,120,6.22,135,5.72,150,5,150.2,4.989828
10,40.3,5.729883,52,6.4,60,6.59,75,6.74,90,6.83,110,6.94,120,6.86,135,6.55,150,5.89,152.2,5.776746
12,39.7,6.01768,52,6.66,60,6.83,75,7,90,7.05,110,7.3,120,7.25,135,7,150,6.59,158,6.255502
14,39.3,6.09945,52,6.74,60,6.94,75,7.19,90,7.3,110,7.62,120,7.65,135,7.37,150,7,180,6.42
16,39.3,6.125296,52,6.77,60,6.98,75,7.3,90,7.53,110,7.82,120,8.05,135,7.79,150,7.34,180,6.88
20,39.8,6.156581,52,6.79,60,6.99,75,7.38,90,7.87,110,8.17,120,8.59,135,8.75,150,8.16,180,7.56

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.87	5.12	5.32	5.25	5.27	5.12	4.64	3.95
8	5.78	6.05	6.25	6.28	6.37	6.22	5.72	5
10	6.4	6.59	6.74	6.83	6.94	6.86	6.55	5.89
12	6.66	6.83	7	7.05	7.3	7.25	7	6.59
14	6.74	6.94	7.19	7.3	7.62	7.65	7.37	7
16	6.77	6.98	7.3	7.53	7.82	8.05	7.79	7.34
20	6.79	6.99	7.38	7.87	8.17	8.59	8.75	8.16

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.22	146.1°	3.42
8	40.9°	3.88	150.2°	4.33
10	40.3°	4.37	152.2°	5.11
12	39.7°	4.63	158°	5.8
14	39.3°	4.72	180°	6.42
16	39.3°	4.74	180°	6.88
20	39.8°	4.73	180°	7.56

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