J-walk II — ORC Rating

GPH

547.8

OSN

532

LOA

13.16 m

Displacement

8824 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7522

Medium

1.0055

High

1.1344

Triple Offshore

Low

0.9663

Medium

1.2328

High

1.3697

Boat Specifications

Dimensions

Length overall: 13.16 m
Beam: 3.87 m
Draft: 2.29 m
Displacement: 8824 kg
Crew weight: 882 kg
Wetted surface: 37.85 m²

Sails

Mainsail: 56.88 m²
Genoa: 63.63 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 157.25 m²

Design

Type: J/133
Builder: J/Composite
Designer: Johnstone
Year built: 2004

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.

6,43.3,5.592405,52,6.22,60,6.55,75,6.76,90,6.62,110,6.34,120,6.17,135,5.57,143.1,5.089506,150,4.7
8,41.2,6.592108,52,7.31,60,7.55,75,7.68,90,7.61,110,7.6,120,7.48,135,6.92,146.2,6.209502,150,5.96
10,39.1,7.125863,52,7.85,60,8.02,75,8.15,90,8.14,110,8.28,120,8.22,135,7.86,149.2,7.08997,150,7.04
12,37.6,7.320555,52,8.08,60,8.27,75,8.45,90,8.5,110,8.73,120,8.73,135,8.43,150,7.82,150.5,7.778429
14,36.8,7.430707,52,8.21,60,8.4,75,8.67,90,8.8,110,9.11,120,9.21,135,8.96,150,8.28,150.7,8.221824
16,36.4,7.51652,52,8.29,60,8.5,75,8.82,90,9.06,110,9.45,120,9.67,135,9.5,150,8.65,170.8,7.638257
20,35.9,7.616892,52,8.4,60,8.64,75,9.05,90,9.46,110,10.04,120,10.65,135,10.82,150,9.43,175.7,8.443768
24,36.1,7.660987,52,8.45,60,8.72,75,9.22,90,9.77,110,10.48,120,11.73,135,13.11,140,12.610234,150,11.15

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	6.22	6.55	6.76	6.62	6.34	6.17	5.57	4.7
8	7.31	7.55	7.68	7.61	7.6	7.48	6.92	5.96
10	7.85	8.02	8.15	8.14	8.28	8.22	7.86	7.04
12	8.08	8.27	8.45	8.5	8.73	8.73	8.43	7.82
14	8.21	8.4	8.67	8.8	9.11	9.21	8.96	8.28
16	8.29	8.5	8.82	9.06	9.45	9.67	9.5	8.65
20	8.4	8.64	9.05	9.46	10.04	10.65	10.82	9.43
24	8.45	8.72	9.22	9.77	10.48	11.73	13.11	11.15

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.3°	4.07	143.1°	4.07
8	41.2°	4.96	146.2°	5.16
10	39.1°	5.53	149.2°	6.09
12	37.6°	5.8	150.5°	6.77
14	36.8°	5.95	150.7°	7.17
16	36.4°	6.05	170.8°	7.54
20	35.9°	6.17	175.7°	8.42
24	36.1°	6.19	140°	9.66

Loading polar chart…