Pure Magic — ORC Rating

GPH

663.1

OSN

645.3

LOA

8.36 m

Displacement

1730 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6965

Medium

0.9361

High

1.0612

Triple Offshore

Low

0.8996

Medium

1.1424

High

1.2833

Boat Specifications

Dimensions

Length overall: 8.36 m
Beam: 2.6 m
Draft: 1.51 m
Displacement: 1730 kg
Crew weight: 431 kg
Wetted surface: 15.25 m²

Sails

Mainsail: 24.33 m²
Genoa: 22.84 m²
Spinnaker: 43.35 m²
Asymmetric spinnaker: 0 m²

Design

Type: J-27
Builder: J boats
Designer: Johnstone
Year built: 1983

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.

6,42.4,4.590664,52,5.14,60,5.42,75,5.69,90,5.62,110,5.34,120,5.16,135,4.64,146.5,3.993352,150,3.84
8,41.2,5.435831,52,6.02,60,6.2,75,6.33,90,6.33,110,6.29,120,6.17,135,5.68,150,4.88,150.8,4.834338
10,38.5,5.813893,52,6.39,60,6.54,75,6.68,90,6.7,110,6.79,120,6.68,135,6.37,150,5.77,152.1,5.680239
12,37.5,5.936825,52,6.53,60,6.72,75,7,90,7.09,110,7.32,120,7.21,135,6.81,150,6.41,165.5,5.918519
14,37.1,5.9931,52,6.6,60,6.82,75,7.21,90,7.48,110,7.84,120,7.78,135,7.32,150,6.82,180,6.31
16,37,6.010251,52,6.64,60,6.88,75,7.34,90,7.78,110,8.21,120,8.43,135,7.89,150,7.29,180,6.7
20,37.6,6.05839,52,6.7,60,6.96,75,7.45,90,8.06,110,8.83,120,9.54,135,9.44,150,8.41,180,7.59

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.14	5.42	5.69	5.62	5.34	5.16	4.64	3.84
8	6.02	6.2	6.33	6.33	6.29	6.17	5.68	4.88
10	6.39	6.54	6.68	6.7	6.79	6.68	6.37	5.77
12	6.53	6.72	7	7.09	7.32	7.21	6.81	6.41
14	6.6	6.82	7.21	7.48	7.84	7.78	7.32	6.82
16	6.64	6.88	7.34	7.78	8.21	8.43	7.89	7.29
20	6.7	6.96	7.45	8.06	8.83	9.54	9.44	8.41

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.39	146.5°	3.33
8	41.2°	4.09	150.8°	4.22
10	38.5°	4.55	152.1°	5.02
12	37.5°	4.71	165.5°	5.73
14	37.1°	4.78	180°	6.31
16	37°	4.8	180°	6.7
20	37.6°	4.8	180°	7.59

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