IRUKANDJI — ORC Rating

GPH

570.4

OSN

556.4

LOA

8.298 m

Displacement

1344 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7533

Medium

0.947

High

1.1165

Triple Offshore

Low

0.9493

Medium

1.1607

High

1.3466

Boat Specifications

Dimensions

Length overall: 8.298 m
Beam: 2.56 m
Draft: 2.18 m
Displacement: 1344 kg
Crew weight: 467 kg
Wetted surface: 14.3 m²

Sails

Mainsail: 28.61 m²
Genoa: 27.48 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 91.34 m²

Design

Type: Viper 830
Builder: Viper Raceboats
Designer: Thompson
Year built: 1996
Stability index: 125.2

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.

6,40.6,5.571131,52,6.2,60,6.4,75,6.52,90,6.44,110,6.26,120,6.15,135,5.56,143.9,5.037192,150,4.7
8,36.9,6.052386,52,6.74,60,6.93,75,7.09,90,7.06,110,7.08,120,7.07,135,6.7,147.9,6.00858,150,5.88
10,35.2,6.241243,52,7.02,60,7.26,75,7.57,90,7.65,110,7.68,120,7.85,135,7.58,150,6.71,151.6,6.60491
12,35,6.396859,52,7.21,60,7.49,75,7.91,90,8.2,110,8.16,120,8.54,135,8.53,149.2,7.602218,150,7.55
14,35,6.506729,52,7.36,60,7.66,75,8.18,90,8.67,110,8.63,120,9.15,135,9.62,146,8.817453,150,8.44
16,35,6.579975,52,7.47,60,7.81,75,8.4,90,9.06,110,9.32,120,9.77,135,10.77,145.1,10.144463,150,9.6
20,35,6.616598,52,7.6,60,8,75,8.76,90,9.67,110,10.78,120,11.01,135,12.82,147,13.306774,150,12.89

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	6.2	6.4	6.52	6.44	6.26	6.15	5.56	4.7
8	6.74	6.93	7.09	7.06	7.08	7.07	6.7	5.88
10	7.02	7.26	7.57	7.65	7.68	7.85	7.58	6.71
12	7.21	7.49	7.91	8.2	8.16	8.54	8.53	7.55
14	7.36	7.66	8.18	8.67	8.63	9.15	9.62	8.44
16	7.47	7.81	8.4	9.06	9.32	9.77	10.77	9.6
20	7.6	8	8.76	9.67	10.78	11.01	12.82	12.89

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	40.6°	4.23	143.9°	4.07
8	36.9°	4.84	147.9°	5.09
10	35.2°	5.1	151.6°	5.81
12	35°	5.24	149.2°	6.53
14	35°	5.33	146°	7.31
16	35°	5.39	145.1°	8.32
20	35°	5.42	147°	11.16

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