Windshear — ORC Rating

GPH

637.3

OSN

618.2

LOA

10.57 m

Displacement

4341 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7137

Medium

0.9682

High

1.1051

Triple Offshore

Low

0.9225

Medium

1.1981

High

1.3377

Boat Specifications

Dimensions

Length overall: 10.57 m
Beam: 3.35 m
Draft: 2.03 m
Displacement: 4341 kg
Crew weight: 400 kg
Wetted surface: 25.58 m²

Sails

Mainsail: 32.94 m²
Genoa: 24.56 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 89.24 m²

Design

Type: J-105
Builder: J-Boats
Designer: Johnstone
Year built: 1992

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.

6,42.6,4.415178,52,4.96,60,5.24,75,5.47,90,5.63,110,5.71,120,5.56,135,4.99,144.2,4.512592,150,4.22
8,40.8,5.23121,52,5.92,60,6.2,75,6.44,90,6.74,110,6.85,120,6.71,135,6.17,147.8,5.436111,150,5.32
10,40,5.900441,52,6.63,60,6.84,75,7,90,7.22,110,7.38,120,7.31,135,7.01,148.1,6.384194,150,6.26
12,39.1,6.288284,52,6.96,60,7.14,75,7.3,90,7.4,110,7.78,120,7.75,135,7.46,149.8,6.942236,150,6.93
14,38.5,6.414449,52,7.09,60,7.29,75,7.52,90,7.59,110,8.1,120,8.24,135,7.92,150,7.27,152.6,7.129861
16,38.2,6.464281,52,7.15,60,7.36,75,7.69,90,7.87,110,8.33,120,8.71,135,8.45,150,7.59,176.3,6.904391
20,37.7,6.546822,52,7.22,60,7.4,75,7.84,90,8.33,110,8.77,120,9.32,135,9.73,150,8.46,177.7,7.596119

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.96	5.24	5.47	5.63	5.71	5.56	4.99	4.22
8	5.92	6.2	6.44	6.74	6.85	6.71	6.17	5.32
10	6.63	6.84	7	7.22	7.38	7.31	7.01	6.26
12	6.96	7.14	7.3	7.4	7.78	7.75	7.46	6.93
14	7.09	7.29	7.52	7.59	8.1	8.24	7.92	7.27
16	7.15	7.36	7.69	7.87	8.33	8.71	8.45	7.59
20	7.22	7.4	7.84	8.33	8.77	9.32	9.73	8.46

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.25	144.2°	3.66
8	40.8°	3.96	147.8°	4.6
10	40°	4.52	148.1°	5.42
12	39.1°	4.88	149.8°	6
14	38.5°	5.02	152.6°	6.33
16	38.2°	5.08	176.3°	6.89
20	37.7°	5.18	177.7°	7.59

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