J-CURVE — ORC Rating | RegattaPages

GPH

575.2

OSN

562.4

LOA

12.2 m

Displacement

7450 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7094

Medium

0.9473

High

1.0663

Triple Offshore

Low

0.924

Medium

1.1725

High

1.2949

Boat Specifications

Dimensions

Length overall: 12.2 m
Beam: 3.64 m
Draft: 2.24 m
Displacement: 7450 kg
Crew weight: 797 kg
Wetted surface: 33.05 m²

Sails

Mainsail: 51.07 m²
Genoa: 42.82 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 155.89 m²

Design

Type: J-122
Builder: J BOATS
Designer: ALAN JOHNSTONE
Year built: 2007

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.

6,42.8,5.029099,52,5.65,60,5.98,75,6.46,90,6.71,110,6.51,120,6.18,135,5.52,143.5,5.02577,150,4.66
8,41.2,5.954162,52,6.72,60,7.02,75,7.44,90,7.64,110,7.54,120,7.38,135,6.85,147,6.009511,150,5.83
10,40.5,6.65434,52,7.37,60,7.57,75,7.78,90,8.04,110,8.03,120,7.97,135,7.68,148.5,6.990053,150,6.88
12,39.4,6.897591,52,7.62,60,7.82,75,8.01,90,8.3,110,8.45,120,8.43,135,8.14,150,7.61,151,7.534703
14,38.6,6.973586,52,7.72,60,7.92,75,8.21,90,8.49,110,8.89,120,8.89,135,8.63,150,7.96,152.5,7.812757
16,38.2,7.011455,52,7.76,60,7.98,75,8.34,90,8.66,110,9.28,120,9.24,135,9.19,150,8.3,176,7.458168
20,38.2,7.164154,52,7.87,60,8.07,75,8.45,90,9.01,110,9.81,120,10.18,135,10.52,150,9.17,178,8.215004

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.65	5.98	6.46	6.71	6.51	6.18	5.52	4.66
8	6.72	7.02	7.44	7.64	7.54	7.38	6.85	5.83
10	7.37	7.57	7.78	8.04	8.03	7.97	7.68	6.88
12	7.62	7.82	8.01	8.3	8.45	8.43	8.14	7.61
14	7.72	7.92	8.21	8.49	8.89	8.89	8.63	7.96
16	7.76	7.98	8.34	8.66	9.28	9.24	9.19	8.3
20	7.87	8.07	8.45	9.01	9.81	10.18	10.52	9.17

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.69	143.5°	4.04
8	41.2°	4.48	147°	5.04
10	40.5°	5.06	148.5°	5.96
12	39.4°	5.33	151°	6.59
14	38.6°	5.45	152.5°	6.93
16	38.2°	5.51	176°	7.44
20	38.2°	5.63	178°	8.21

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