Noah — ORC Rating | RegattaPages

GPH

764.4

OSN

737.3

LOA

9.32 m

Displacement

5098 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5252

Medium

0.7256

High

0.8523

Triple Offshore

Low

0.6743

Medium

0.8918

High

1.0071

Boat Specifications

Dimensions

Length overall: 9.32 m
Beam: 3.29 m
Draft: 1.82 m
Displacement: 5098 kg
Crew weight: 450 kg
Wetted surface: 21.36 m²

Sails

Mainsail: 20.69 m²
Genoa: 24.5 m²
Spinnaker: 52.5 m²
Asymmetric spinnaker: 0 m²

Design

Type: Dufour 31
Builder: TAYLOR
Designer: M. DUFOUR
Year built: 1975
Stability index: 121.7

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.

6,44.4,3.751018,52,4.13,60,4.36,75,4.51,90,4.52,110,4.6,120,4.45,135,4.03,147.8,3.557107,150,3.47
8,42.4,4.441704,52,4.94,60,5.17,75,5.33,90,5.47,110,5.56,120,5.42,135,5.01,150,4.45,151.4,4.396441
10,41.2,4.9175,52,5.49,60,5.7,75,5.87,90,6.06,110,6.15,120,6.07,135,5.76,150,5.24,155.6,5.018208
12,40.6,5.29455,52,5.84,60,6.02,75,6.17,90,6.36,110,6.47,120,6.42,135,6.22,150,5.87,161.3,5.489805
14,39.9,5.513806,52,6.06,60,6.21,75,6.37,90,6.55,110,6.7,120,6.67,135,6.52,150,6.26,174.5,5.786641
16,39.4,5.629366,52,6.18,60,6.34,75,6.51,90,6.66,110,6.92,120,6.91,135,6.76,150,6.53,179,6.160938
20,39.6,5.710479,52,6.27,60,6.45,75,6.71,90,6.85,110,7.32,120,7.4,135,7.28,150,7,179,6.671016

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.13	4.36	4.51	4.52	4.6	4.45	4.03	3.47
8	4.94	5.17	5.33	5.47	5.56	5.42	5.01	4.45
10	5.49	5.7	5.87	6.06	6.15	6.07	5.76	5.24
12	5.84	6.02	6.17	6.36	6.47	6.42	6.22	5.87
14	6.06	6.21	6.37	6.55	6.7	6.67	6.52	6.26
16	6.18	6.34	6.51	6.66	6.92	6.91	6.76	6.53
20	6.27	6.45	6.71	6.85	7.32	7.4	7.28	7

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.4°	2.68	147.8°	3.01
8	42.4°	3.28	151.4°	3.86
10	41.2°	3.7	155.6°	4.57
12	40.6°	4.02	161.3°	5.2
14	39.9°	4.23	174.5°	5.76
16	39.4°	4.35	179°	6.16
20	39.6°	4.4	179°	6.67

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