BALANGUERA — ORC Rating

GPH

732.2

OSN

710.6

LOA

9.32 m

Displacement

4480 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6234

Medium

0.8458

High

0.9872

Triple Offshore

Low

0.8011

Medium

1.0415

High

1.1733

Boat Specifications

Dimensions

Length overall: 9.32 m
Beam: 3.29 m
Draft: 1.77 m
Displacement: 4480 kg
Crew weight: 450 kg
Wetted surface: 20.25 m²

Sails

Mainsail: 19.84 m²
Genoa: 29.31 m²
Spinnaker: 63.52 m²
Asymmetric spinnaker: 61.84 m²

Design

Type: DUFOUR 31
Builder: DUFOUR
Designer: DUFOUR
Year built: 1977

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.

6,43.5,3.942792,52,4.39,60,4.63,75,4.82,90,4.8,110,4.86,120,4.7,135,4.3,148,3.785163,150,3.71
8,42,4.588608,52,5.15,60,5.44,75,5.66,90,5.76,110,5.85,120,5.69,135,5.24,150,4.63,152,4.552932
10,42,5.153773,52,5.74,60,5.97,75,6.13,90,6.3,110,6.36,120,6.29,135,6.02,150,5.43,153,5.29738
12,41.1,5.546979,52,6.08,60,6.25,75,6.39,90,6.58,110,6.67,120,6.62,135,6.43,150,6.09,160,5.725276
14,40.1,5.739152,52,6.27,60,6.42,75,6.58,90,6.77,110,6.96,120,6.92,135,6.72,150,6.44,180,5.97
16,39.8,5.831181,52,6.37,60,6.54,75,6.74,90,6.88,110,7.24,120,7.23,135,7.03,150,6.71,180,6.35
20,40.1,5.856811,52,6.41,60,6.62,75,6.97,90,7.18,110,7.6,120,7.74,135,7.62,150,7.28,180,6.88

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.39	4.63	4.82	4.8	4.86	4.7	4.3	3.71
8	5.15	5.44	5.66	5.76	5.85	5.69	5.24	4.63
10	5.74	5.97	6.13	6.3	6.36	6.29	6.02	5.43
12	6.08	6.25	6.39	6.58	6.67	6.62	6.43	6.09
14	6.27	6.42	6.58	6.77	6.96	6.92	6.72	6.44
16	6.37	6.54	6.74	6.88	7.24	7.23	7.03	6.71
20	6.41	6.62	6.97	7.18	7.6	7.74	7.62	7.28

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	2.86	148°	3.21
8	42°	3.41	152°	4.02
10	42°	3.83	153°	4.72
12	41.1°	4.18	160°	5.38
14	40.1°	4.39	180°	5.97
16	39.8°	4.48	180°	6.35
20	40.1°	4.48	180°	6.88

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