CHESTRESS — ORC Rating

GPH

608.6

OSN

592

LOA

10.757 m

Displacement

5158 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6875

Medium

0.9034

High

1.0058

Triple Offshore

Low

0.8786

Medium

1.1064

High

1.2118

Boat Specifications

Dimensions

Length overall: 10.757 m
Beam: 3.52 m
Draft: 2.15 m
Displacement: 5158 kg
Crew weight: 530 kg
Wetted surface: 26.21 m²

Sails

Mainsail: 37.33 m²
Genoa: 39.72 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 115.17 m²

Design

Type: J-109
Builder: J-Composite
Designer: Johnstone
Year built: 2001

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.

6,42.5,5.004901,52,5.57,60,5.83,75,5.99,90,5.86,110,5.89,120,5.74,135,5.15,143.9,4.678276,150,4.37
8,40.6,5.860883,52,6.51,60,6.71,75,6.83,90,6.79,110,6.97,120,6.87,135,6.39,147.6,5.661307,150,5.52
10,38.8,6.313051,52,6.99,60,7.15,75,7.27,90,7.27,110,7.5,120,7.47,135,7.19,148.5,6.591292,150,6.48
12,37.9,6.475862,52,7.18,60,7.35,75,7.53,90,7.58,110,7.86,120,7.91,135,7.68,149.9,7.143258,150,7.13
14,37.5,6.554457,52,7.27,60,7.45,75,7.71,90,7.84,110,8.11,120,8.3,135,8.14,150,7.5,150.5,7.456721
16,37.8,6.644266,52,7.31,60,7.51,75,7.81,90,8.05,110,8.32,120,8.65,135,8.61,150,7.81,173.7,7.022409
20,37.9,6.691302,52,7.37,60,7.59,75,7.96,90,8.34,110,8.7,120,9.18,135,9.76,150,8.48,175.9,7.729782
24,39.3,6.706811,52,7.36,60,7.59,75,8.04,90,8.53,110,9.04,120,9.73,135,11.63,139.9,11.569816,150,10.22

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.57	5.83	5.99	5.86	5.89	5.74	5.15	4.37
8	6.51	6.71	6.83	6.79	6.97	6.87	6.39	5.52
10	6.99	7.15	7.27	7.27	7.5	7.47	7.19	6.48
12	7.18	7.35	7.53	7.58	7.86	7.91	7.68	7.13
14	7.27	7.45	7.71	7.84	8.11	8.3	8.14	7.5
16	7.31	7.51	7.81	8.05	8.32	8.65	8.61	7.81
20	7.37	7.59	7.96	8.34	8.7	9.18	9.76	8.48
24	7.36	7.59	8.04	8.53	9.04	9.73	11.63	10.22

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.5°	3.69	143.9°	3.78
8	40.6°	4.45	147.6°	4.78
10	38.8°	4.92	148.5°	5.62
12	37.9°	5.11	149.9°	6.18
14	37.5°	5.2	150.5°	6.49
16	37.8°	5.25	173.7°	6.98
20	37.9°	5.28	175.9°	7.71
24	39.3°	5.19	139.9°	8.85

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