TARAHUMARA — ORC Rating

GPH

574.7

OSN

561.8

LOA

12.2 m

Displacement

7346 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7061

Medium

0.9476

High

1.0706

Triple Offshore

Low

0.922

Medium

1.1744

High

1.3029

Boat Specifications

Dimensions

Length overall: 12.2 m
Beam: 3.64 m
Draft: 2.23 m
Displacement: 7346 kg
Crew weight: 736 kg
Wetted surface: 32.87 m²

Sails

Mainsail: 50.69 m²
Genoa: 42.65 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 154.83 m²

Design

Type: J 122
Builder: JBOAT
Designer: JOHNSTONE
Year built: 2006

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.

6,42.8,4.988212,52,5.61,60,5.95,75,6.48,90,6.74,110,6.55,120,6.24,135,5.51,143.5,5.01333,150,4.65
8,41.2,5.91429,52,6.69,60,7,75,7.45,90,7.66,110,7.58,120,7.38,135,6.84,147,6.009511,150,5.82
10,40.5,6.641189,52,7.36,60,7.56,75,7.81,90,8.07,110,8.07,120,7.97,135,7.67,148.5,6.978325,150,6.88
12,39.4,6.923473,52,7.64,60,7.83,75,8.01,90,8.35,110,8.51,120,8.44,135,8.14,150,7.6,150.9,7.542011
14,38.4,7.00529,52,7.75,60,7.96,75,8.24,90,8.57,110,8.97,120,8.94,135,8.64,150,7.96,152,7.837385
16,38.2,7.062355,52,7.81,60,8.03,75,8.41,90,8.75,110,9.39,120,9.34,135,9.2,150,8.3,176,7.458168
20,38.2,7.227779,52,7.9,60,8.1,75,8.56,90,9.12,110,9.98,120,10.37,135,10.58,150,9.18,178,8.215004

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.61	5.95	6.48	6.74	6.55	6.24	5.51	4.65
8	6.69	7	7.45	7.66	7.58	7.38	6.84	5.82
10	7.36	7.56	7.81	8.07	8.07	7.97	7.67	6.88
12	7.64	7.83	8.01	8.35	8.51	8.44	8.14	7.6
14	7.75	7.96	8.24	8.57	8.97	8.94	8.64	7.96
16	7.81	8.03	8.41	8.75	9.39	9.34	9.2	8.3
20	7.9	8.1	8.56	9.12	9.98	10.37	10.58	9.18

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.66	143.5°	4.03
8	41.2°	4.45	147°	5.04
10	40.5°	5.05	148.5°	5.95
12	39.4°	5.35	150.9°	6.59
14	38.4°	5.49	152°	6.92
16	38.2°	5.55	176°	7.44
20	38.2°	5.68	178°	8.21

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