SPITFIRE — ORC Rating

GPH

608.8

OSN

591

LOA

10.57 m

Displacement

3994 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6718

Medium

0.9019

High

1.0169

Triple Offshore

Low

0.8654

Medium

1.1107

High

1.2429

Boat Specifications

Dimensions

Length overall: 10.57 m
Beam: 3.35 m
Draft: 2.01 m
Displacement: 3994 kg
Crew weight: 500 kg
Wetted surface: 24.02 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
Stability index: 116.5

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.

6,43,4.867686,52,5.44,60,5.76,75,6.01,90,5.93,110,5.77,120,5.61,135,5.06,143.9,4.591642,150,4.29
8,41.8,5.835198,52,6.5,60,6.75,75,6.91,90,6.89,110,6.94,120,6.82,135,6.3,147.5,5.584595,150,5.44
10,39.9,6.400186,52,7.02,60,7.19,75,7.32,90,7.36,110,7.51,120,7.44,135,7.14,148.8,6.511846,150,6.44
12,38.2,6.553356,52,7.22,60,7.41,75,7.62,90,7.68,110,8.02,120,7.98,135,7.64,150,7.1,150.5,7.066077
14,37.6,6.651608,52,7.32,60,7.53,75,7.88,90,8.05,110,8.48,120,8.58,135,8.2,150,7.47,150.9,7.404676
16,37.2,6.70408,52,7.38,60,7.62,75,8.05,90,8.38,110,8.79,120,9.18,135,8.83,150,7.83,173.9,6.989575
20,36.9,6.765167,52,7.44,60,7.7,75,8.24,90,8.84,110,9.39,120,10.08,135,10.47,142.6,9.768199,150,8.96

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.44	5.76	6.01	5.93	5.77	5.61	5.06	4.29
8	6.5	6.75	6.91	6.89	6.94	6.82	6.3	5.44
10	7.02	7.19	7.32	7.36	7.51	7.44	7.14	6.44
12	7.22	7.41	7.62	7.68	8.02	7.98	7.64	7.1
14	7.32	7.53	7.88	8.05	8.48	8.58	8.2	7.47
16	7.38	7.62	8.05	8.38	8.79	9.18	8.83	7.83
20	7.44	7.7	8.24	8.84	9.39	10.08	10.47	8.96

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.56	143.9°	3.71
8	41.8°	4.35	147.5°	4.71
10	39.9°	4.91	148.8°	5.57
12	38.2°	5.15	150.5°	6.15
14	37.6°	5.27	150.9°	6.47
16	37.2°	5.34	173.9°	6.95
20	36.9°	5.41	142.6°	7.76

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