WEATHERLY — ORC Rating

GPH

526.7

OSN

515.1

LOA

20.38 m

Displacement

26281 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7575

Medium

1.0253

High

1.2124

Triple Offshore

Low

0.9903

Medium

1.2858

High

1.4535

Boat Specifications

Dimensions

Length overall: 20.38 m
Beam: 3.67 m
Draft: 2.71 m
Displacement: 26281 kg
Crew weight: 1073 kg
Wetted surface: 65.21 m²

Sails

Mainsail: 139.66 m²
Genoa: 104.56 m²
Spinnaker: 229.88 m²
Asymmetric spinnaker: 0 m²

Design

Type: 12 METER
Builder: LUDERS
Designer: RHODES
Year built: 1958

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.

6,43.5,5.707398,52,6.36,60,6.74,75,7.09,90,7.07,110,6.57,120,6.38,135,5.72,140.4,5.38602,150,4.79
8,42.4,6.689639,52,7.54,60,7.99,75,8.29,90,8.3,110,8.01,120,7.81,135,7.07,147,6.1049,150,5.91
10,42.8,7.468689,52,8.3,60,8.64,75,8.86,90,8.9,110,8.87,120,8.75,135,8.23,144.2,7.582634,150,7.11
12,41.8,7.860749,52,8.66,60,8.96,75,9.18,90,9.25,110,9.33,120,9.24,135,8.9,150,8.14,152,8.00727
14,40.5,8.035182,52,8.87,60,9.14,75,9.42,90,9.53,110,9.61,120,9.63,135,9.31,150,8.81,158.5,8.372585
16,39.8,8.174066,52,8.99,60,9.26,75,9.59,90,9.79,110,9.8,120,10.01,135,9.68,150,9.23,180,8.44
20,38.5,8.305561,52,9.14,60,9.4,75,9.8,90,10.21,110,10.19,120,10.48,135,10.5,150,9.95,180,9.34

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	6.36	6.74	7.09	7.07	6.57	6.38	5.72	4.79
8	7.54	7.99	8.29	8.3	8.01	7.81	7.07	5.91
10	8.3	8.64	8.86	8.9	8.87	8.75	8.23	7.11
12	8.66	8.96	9.18	9.25	9.33	9.24	8.9	8.14
14	8.87	9.14	9.42	9.53	9.61	9.63	9.31	8.81
16	8.99	9.26	9.59	9.79	9.8	10.01	9.68	9.23
20	9.14	9.4	9.8	10.21	10.19	10.48	10.5	9.95

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	4.14	140.4°	4.15
8	42.4°	4.94	147°	5.12
10	42.8°	5.48	144.2°	6.15
12	41.8°	5.86	152°	7.07
14	40.5°	6.11	158.5°	7.79
16	39.8°	6.28	180°	8.44
20	38.5°	6.5	180°	9.34

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