Jaffa — ORC Rating | RegattaPages

GPH

649.9

OSN

630.6

LOA

9.12 m

Displacement

2600 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6311

Medium

0.8492

High

0.9627

Triple Offshore

Low

0.8113

Medium

1.0399

High

1.162

Boat Specifications

Dimensions

Length overall: 9.12 m
Beam: 3.19 m
Draft: 1.72 m
Displacement: 2600 kg
Crew weight: 515 kg
Wetted surface: 19.1 m²

Sails

Mainsail: 26.95 m²
Genoa: 25.12 m²
Spinnaker: 56.77 m²
Asymmetric spinnaker: 0 m²

Design

Type: One off
Builder: Steve Etheridge
Designer: Robert Weguelin
Year built: 1989
Stability index: 104

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.

6,43.2,4.705278,52,5.23,60,5.5,75,5.66,90,5.53,110,5.39,120,5.22,135,4.67,144.3,4.186761,150,3.93
8,40.8,5.482202,52,6.1,60,6.31,75,6.45,90,6.4,110,6.45,120,6.29,135,5.78,149.3,5.059009,150,5.03
10,38.8,5.915277,52,6.57,60,6.73,75,6.87,90,6.89,110,7.02,120,6.92,135,6.56,150,5.95,153.3,5.787067
12,38.1,6.099614,52,6.79,60,6.98,75,7.18,90,7.22,110,7.49,120,7.42,135,7.06,150,6.62,159.5,6.245515
14,38.4,6.226925,52,6.88,60,7.1,75,7.43,90,7.56,110,7.91,120,7.89,135,7.54,150,7.08,173.6,6.480386
16,38.7,6.2914,52,6.94,60,7.18,75,7.58,90,7.84,110,8.27,120,8.38,135,8.04,150,7.53,177.2,6.918259
20,39.5,6.2984,52,6.96,60,7.24,75,7.74,90,8.24,110,8.77,120,9.4,135,9.31,150,8.51,177.5,7.757383

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.23	5.5	5.66	5.53	5.39	5.22	4.67	3.93
8	6.1	6.31	6.45	6.4	6.45	6.29	5.78	5.03
10	6.57	6.73	6.87	6.89	7.02	6.92	6.56	5.95
12	6.79	6.98	7.18	7.22	7.49	7.42	7.06	6.62
14	6.88	7.1	7.43	7.56	7.91	7.89	7.54	7.08
16	6.94	7.18	7.58	7.84	8.27	8.38	8.04	7.53
20	6.96	7.24	7.74	8.24	8.77	9.4	9.31	8.51

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.2°	3.43	144.3°	3.4
8	40.8°	4.15	149.3°	4.35
10	38.8°	4.61	153.3°	5.17
12	38.1°	4.8	159.5°	5.85
14	38.4°	4.88	173.6°	6.44
16	38.7°	4.91	177.2°	6.91
20	39.5°	4.86	177.5°	7.75

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