Windshear — ORC Rating

GPH

628.1

OSN

608.7

LOA

10.57 m

Displacement

4341 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6453

Medium

0.8746

High

0.9915

Triple Offshore

Low

0.8322

Medium

1.0804

High

1.2103

Boat Specifications

Dimensions

Length overall: 10.57 m
Beam: 3.35 m
Draft: 2.03 m
Displacement: 4341 kg
Crew weight: 240 kg
Wetted surface: 24.47 m²

Sails

Mainsail: 32.94 m²
Genoa: 26.38 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 89.24 m²

Design

Type: J-105
Builder: J-Boats
Designer: Johnstone
Year built: 1992
Stability index: 120.4

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.

6,43,4.498507,52,5.03,60,5.32,75,5.55,90,5.66,110,5.74,120,5.6,135,5.05,143.9,4.591642,150,4.29
8,41.4,5.385869,52,6.05,60,6.34,75,6.55,90,6.79,110,6.91,120,6.79,135,6.28,147.8,5.554287,150,5.43
10,40.6,6.071611,52,6.73,60,6.94,75,7.09,90,7.24,110,7.45,120,7.4,135,7.11,148.7,6.495339,150,6.41
12,39.3,6.370824,52,7.02,60,7.2,75,7.38,90,7.44,110,7.9,120,7.91,135,7.61,150,7.07,150.2,7.052597
14,38.4,6.443846,52,7.14,60,7.35,75,7.62,90,7.73,110,8.22,120,8.47,135,8.16,150,7.44,151.1,7.356095
16,38.2,6.502456,52,7.2,60,7.43,75,7.82,90,8.05,110,8.5,120,8.93,135,8.79,150,7.79,173.9,6.959405
20,37.8,6.593643,52,7.28,60,7.49,75,8.01,90,8.57,110,9.02,120,9.64,135,10.37,142.6,9.755611,150,8.95

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.03	5.32	5.55	5.66	5.74	5.6	5.05	4.29
8	6.05	6.34	6.55	6.79	6.91	6.79	6.28	5.43
10	6.73	6.94	7.09	7.24	7.45	7.4	7.11	6.41
12	7.02	7.2	7.38	7.44	7.9	7.91	7.61	7.07
14	7.14	7.35	7.62	7.73	8.22	8.47	8.16	7.44
16	7.2	7.43	7.82	8.05	8.5	8.93	8.79	7.79
20	7.28	7.49	8.01	8.57	9.02	9.64	10.37	8.95

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.29	143.9°	3.71
8	41.4°	4.04	147.8°	4.7
10	40.6°	4.61	148.7°	5.55
12	39.3°	4.93	150.2°	6.12
14	38.4°	5.05	151.1°	6.44
16	38.2°	5.11	173.9°	6.92
20	37.8°	5.21	142.6°	7.75

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