PROBLEM CHILD — ORC Rating

GPH

684.5

OSN

667.5

LOA

7.92 m

Displacement

2086 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6192

Medium

0.8112

High

0.9087

Triple Offshore

Low

0.79

Medium

0.9771

High

1.078

Boat Specifications

Dimensions

Length overall: 7.92 m
Beam: 2.85 m
Draft: 1.61 m
Displacement: 2086 kg
Crew weight: 398 kg
Wetted surface: 14.38 m²

Sails

Mainsail: 20.5 m²
Genoa: 25.57 m²
Spinnaker: 50.34 m²
Asymmetric spinnaker: 0 m²

Design

Type: BC-27
Builder: BC Boatworks
Designer: Jones
Year built: 1992

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.

6,42,4.480957,52,5.05,60,5.32,75,5.53,90,5.46,110,5.23,120,5.08,135,4.62,147,4.089806,150,3.96
8,41.1,5.268303,52,5.81,60,5.97,75,6.09,90,6.09,110,6.09,120,6.01,135,5.65,150,4.942118
10,39,5.610272,52,6.13,60,6.25,75,6.36,90,6.39,110,6.49,120,6.43,135,6.21,150,5.77,154,5.607514
12,37.9,5.72816,52,6.27,60,6.42,75,6.59,90,6.64,110,6.86,120,6.82,135,6.57,150,6.25,171,5.730553
14,37.5,5.785568,52,6.33,60,6.5,75,6.78,90,6.91,110,7.21,120,7.25,135,6.97,150,6.58,180,6.15
16,37.5,5.823383,52,6.36,60,6.55,75,6.9,90,7.16,110,7.43,120,7.66,135,7.41,150,6.95,180,6.48
20,37.1,5.842645,52,6.4,60,6.57,75,7,90,7.5,110,7.8,120,8.23,135,8.44,150,7.78,180,7.2

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.05	5.32	5.53	5.46	5.23	5.08	4.62	3.96
8	5.81	5.97	6.09	6.09	6.09	6.01	5.65	4.95
10	6.13	6.25	6.36	6.39	6.49	6.43	6.21	5.77
12	6.27	6.42	6.59	6.64	6.86	6.82	6.57	6.25
14	6.33	6.5	6.78	6.91	7.21	7.25	6.97	6.58
16	6.36	6.55	6.9	7.16	7.43	7.66	7.41	6.95
20	6.4	6.57	7	7.5	7.8	8.23	8.44	7.78

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.33	147°	3.43
8	41.1°	3.97	150°	4.28
10	39°	4.36	154°	5.04
12	37.9°	4.52	171°	5.66
14	37.5°	4.59	180°	6.15
16	37.5°	4.62	180°	6.48
20	37.1°	4.66	180°	7.2

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