RIC ET RAC — ORC Rating

GPH

750.3

OSN

726.9

LOA

9.363 m

Displacement

4643 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6053

Medium

0.8233

High

0.9626

Triple Offshore

Low

0.7761

Medium

1.0194

High

1.1499

Boat Specifications

Dimensions

Length overall: 9.363 m
Beam: 3.17 m
Draft: 1.79 m
Displacement: 4643 kg
Crew weight: 300 kg
Wetted surface: 20.8 m²

Sails

Mainsail: 19.25 m²
Genoa: 27.58 m²
Spinnaker: 64.15 m²
Asymmetric spinnaker: 0 m²

Design

Type: DUFOUR 31
Builder: DUFOUR SA
Designer: M.DUFOUR
Year built: 1978

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.

6,43.3,3.764911,52,4.18,60,4.41,75,4.59,90,4.6,110,4.73,120,4.61,135,4.22,148.1,3.710371,150,3.64
8,41.6,4.399583,52,4.93,60,5.19,75,5.42,90,5.58,110,5.74,120,5.61,135,5.15,150,4.56,152.1,4.480826
10,41.7,4.942153,52,5.56,60,5.83,75,6.02,90,6.21,110,6.32,120,6.25,135,5.97,150,5.37,152.8,5.239391
12,42.2,5.413033,52,5.96,60,6.15,75,6.32,90,6.48,110,6.63,120,6.59,135,6.4,150,6.05,159,5.709203
14,41.5,5.634512,52,6.16,60,6.34,75,6.5,90,6.59,110,6.9,120,6.88,135,6.7,150,6.42,180,5.92
16,41.2,5.728222,52,6.27,60,6.45,75,6.65,90,6.74,110,7.13,120,7.18,135,6.99,150,6.69,180,6.32
20,41.9,5.777151,52,6.3,60,6.52,75,6.86,90,7.07,110,7.36,120,7.63,135,7.58,150,7.25,180,6.86

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.18	4.41	4.59	4.6	4.73	4.61	4.22	3.64
8	4.93	5.19	5.42	5.58	5.74	5.61	5.15	4.56
10	5.56	5.83	6.02	6.21	6.32	6.25	5.97	5.37
12	5.96	6.15	6.32	6.48	6.63	6.59	6.4	6.05
14	6.16	6.34	6.5	6.59	6.9	6.88	6.7	6.42
16	6.27	6.45	6.65	6.74	7.13	7.18	6.99	6.69
20	6.3	6.52	6.86	7.07	7.36	7.63	7.58	7.25

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.3°	2.74	148.1°	3.15
8	41.6°	3.29	152.1°	3.96
10	41.7°	3.69	152.8°	4.66
12	42.2°	4.01	159°	5.33
14	41.5°	4.22	180°	5.92
16	41.2°	4.31	180°	6.32
20	41.9°	4.3	180°	6.86

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