CHESTRESS — ORC Rating

GPH

613.5

OSN

597.1

LOA

10.757 m

Displacement

5157 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.673

Medium

0.8949

High

1.0009

Triple Offshore

Low

0.8653

Medium

1.1006

High

1.2115

Boat Specifications

Dimensions

Length overall: 10.757 m
Beam: 3.52 m
Draft: 2.14 m
Displacement: 5157 kg
Crew weight: 530 kg
Wetted surface: 26.08 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
Stability index: 117.2

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.

6,43,4.812993,52,5.36,60,5.66,75,5.9,90,5.83,110,5.87,120,5.74,135,5.16,144.8,4.650338,150,4.39
8,41.7,5.705575,52,6.38,60,6.64,75,6.81,90,6.86,110,7,120,6.9,135,6.42,147.8,5.648828,150,5.51
10,40.5,6.312418,52,6.94,60,7.12,75,7.25,90,7.28,110,7.51,120,7.47,135,7.21,148.4,6.621841,150,6.51
12,39,6.485268,52,7.15,60,7.33,75,7.51,90,7.57,110,7.89,120,7.93,135,7.67,150,7.15,150.5,7.123524
14,38.4,6.558687,52,7.24,60,7.43,75,7.71,90,7.86,110,8.15,120,8.39,135,8.16,150,7.49,152,7.361705
16,38.7,6.650177,52,7.28,60,7.48,75,7.83,90,8.12,110,8.39,120,8.74,135,8.69,150,7.8,173.6,7.043898
20,38.4,6.699048,52,7.33,60,7.53,75,7.95,90,8.46,110,8.8,120,9.3,135,9.97,150,8.54,175.7,7.721736

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.36	5.66	5.9	5.83	5.87	5.74	5.16	4.39
8	6.38	6.64	6.81	6.86	7	6.9	6.42	5.51
10	6.94	7.12	7.25	7.28	7.51	7.47	7.21	6.51
12	7.15	7.33	7.51	7.57	7.89	7.93	7.67	7.15
14	7.24	7.43	7.71	7.86	8.15	8.39	8.16	7.49
16	7.28	7.48	7.83	8.12	8.39	8.74	8.69	7.8
20	7.33	7.53	7.95	8.46	8.8	9.3	9.97	8.54

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.52	144.8°	3.8
8	41.7°	4.26	147.8°	4.78
10	40.5°	4.8	148.4°	5.64
12	39°	5.04	150.5°	6.2
14	38.4°	5.14	152°	6.5
16	38.7°	5.19	173.6°	7
20	38.4°	5.25	175.7°	7.7

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