RATTLE AND RUM — ORC Rating

GPH

595

OSN

584.6

LOA

7.9 m

Displacement

1142 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.707

Medium

0.8901

High

1.0331

Triple Offshore

Low

0.9091

Medium

1.1172

High

1.2752

Boat Specifications

Dimensions

Length overall: 7.9 m
Beam: 2.55 m
Draft: 1.9 m
Displacement: 1142 kg
Crew weight: 450 kg
Wetted surface: 14.82 m²

Sails

Mainsail: 27.55 m²
Genoa: 14.85 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 80.63 m²

Design

Type: GP 26
Builder: Mag Marin Istanbul
Designer: DONOVAN
Year built: 2011

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.

6,43.5,5.25246,52,5.86,60,6.17,75,6.41,90,6.44,110,6.18,120,6.07,135,5.39,143.5,4.87649,150,4.53
8,40.5,5.865288,52,6.49,60,6.72,75,7.06,90,7.08,110,7.04,120,6.99,135,6.56,147,5.914122,150,5.73
10,38.6,6.001122,52,6.68,60,6.96,75,7.51,90,7.86,110,7.7,120,7.9,135,7.41,150,6.56,150.5,6.526067
12,39,6.137843,52,6.8,60,7.15,75,7.78,90,8.33,110,8.25,120,8.54,135,8.52,148.5,7.459184,150,7.35
14,39,6.137843,52,6.84,60,7.28,75,7.98,90,8.64,110,9.04,120,9.23,135,9.77,145,8.813993,150,8.34
16,39,6.202181,52,6.88,60,7.25,75,8.12,90,8.9,110,9.79,120,9.99,135,10.78,143,10.267512,150,9.46
20,39.9,6.230731,52,6.94,60,7.39,75,8.28,90,9.12,110,10.65,120,11.26,135,12.54,145.6,13.549651,150,12.91

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.86	6.17	6.41	6.44	6.18	6.07	5.39	4.53
8	6.49	6.72	7.06	7.08	7.04	6.99	6.56	5.73
10	6.68	6.96	7.51	7.86	7.7	7.9	7.41	6.56
12	6.8	7.15	7.78	8.33	8.25	8.54	8.52	7.35
14	6.84	7.28	7.98	8.64	9.04	9.23	9.77	8.34
16	6.88	7.25	8.12	8.9	9.79	9.99	10.78	9.46
20	6.94	7.39	8.28	9.12	10.65	11.26	12.54	12.91

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	3.81	143.5°	3.92
8	40.5°	4.46	147°	4.96
10	38.6°	4.69	150.5°	5.68
12	39°	4.77	148.5°	6.36
14	39°	4.77	145°	7.22
16	39°	4.82	143°	8.2
20	39.9°	4.78	145.6°	11.18

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