SPITFIRE — ORC Rating

GPH

607.6

OSN

590

LOA

10.57 m

Displacement

3999 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.68

Medium

0.9047

High

1.0189

Triple Offshore

Low

0.8719

Medium

1.1109

High

1.2355

Boat Specifications

Dimensions

Length overall: 10.57 m
Beam: 3.34 m
Draft: 2.01 m
Displacement: 3999 kg
Crew weight: 500 kg
Wetted surface: 24.23 m²

Sails

Mainsail: 33.86 m²
Genoa: 38.84 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 87.12 m²

Design

Type: J 105
Builder: TPI
Designer: Johnstone
Year built: 1991

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.

6,42.7,5.020992,52,5.59,60,5.86,75,6.02,90,5.95,110,5.79,120,5.57,135,5.01,143.5,4.565489,150,4.24
8,40.5,5.904741,52,6.55,60,6.75,75,6.86,90,6.93,110,6.86,120,6.73,135,6.22,147.3,5.549543,150,5.39
10,38.3,6.358499,52,7.04,60,7.19,75,7.3,90,7.43,110,7.47,120,7.4,135,7.06,148.8,6.430009,150,6.35
12,37.1,6.532228,52,7.25,60,7.42,75,7.59,90,7.76,110,7.92,120,7.91,135,7.6,149.6,7.03757,150,7.01
14,36.8,6.656415,52,7.35,60,7.54,75,7.81,90,7.98,110,8.3,120,8.39,135,8.12,149.8,7.439763,150,7.42
16,36.5,6.717614,52,7.42,60,7.62,75,7.94,90,8.18,110,8.69,120,8.87,135,8.65,150,7.78,173.4,6.9259
20,36.3,6.787204,52,7.51,60,7.74,75,8.14,90,8.55,110,9.45,120,9.85,135,10.06,150,8.54,175.7,7.691651
24,36.9,6.815186,52,7.53,60,7.79,75,8.28,90,8.82,110,10.2,120,11.52,135,13.06,139.6,12.67172,150,11.15

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.59	5.86	6.02	5.95	5.79	5.57	5.01	4.24
8	6.55	6.75	6.86	6.93	6.86	6.73	6.22	5.39
10	7.04	7.19	7.3	7.43	7.47	7.4	7.06	6.35
12	7.25	7.42	7.59	7.76	7.92	7.91	7.6	7.01
14	7.35	7.54	7.81	7.98	8.3	8.39	8.12	7.42
16	7.42	7.62	7.94	8.18	8.69	8.87	8.65	7.78
20	7.51	7.74	8.14	8.55	9.45	9.85	10.06	8.54
24	7.53	7.79	8.28	8.82	10.2	11.52	13.06	11.15

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.7°	3.69	143.5°	3.67
8	40.5°	4.49	147.3°	4.67
10	38.3°	4.99	148.8°	5.5
12	37.1°	5.21	149.6°	6.07
14	36.8°	5.33	149.8°	6.43
16	36.5°	5.4	173.4°	6.88
20	36.3°	5.47	175.7°	7.67
24	36.9°	5.45	139.6°	9.65

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