IRUKANDJI — ORC Rating

GPH

580.2

OSN

564

LOA

8.298 m

Displacement

1344 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7371

Medium

0.9374

High

1.1074

Triple Offshore

Low

0.9286

Medium

1.1448

High

1.3293

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: 14.42 m²

Sails

Mainsail: 28.61 m²
Genoa: 18.91 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 91.34 m²

Design

Type: Viper 830
Builder: Viper Raceboats
Designer: Thompson
Year built: 1996

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.

6,40.6,5.29455,52,5.94,60,6.16,75,6.28,90,6.17,110,6.23,120,6.13,135,5.54,143.6,5.044144,150,4.69
8,37.5,5.936825,52,6.6,60,6.76,75,6.88,90,6.84,110,7.04,120,7.04,135,6.68,147.8,5.99154,150,5.86
10,35.6,6.173897,52,6.91,60,7.13,75,7.37,90,7.41,110,7.6,120,7.79,135,7.54,149.6,6.712937,150,6.69
12,35,6.323612,52,7.1,60,7.37,75,7.76,90,7.96,110,8.05,120,8.42,135,8.47,149,7.583117,150,7.51
14,35,6.433482,52,7.25,60,7.55,75,8.03,90,8.45,110,8.5,120,9.01,135,9.52,145.9,8.767477,150,8.38
16,35,6.518936,52,7.37,60,7.7,75,8.27,90,8.87,110,8.95,120,9.59,135,10.61,145.2,10.034717,150,9.51
20,35,6.604391,52,7.54,60,7.92,75,8.66,90,9.58,110,10.41,120,10.76,135,12.51,146.9,13.142836,150,12.72
24,35.2,6.547186,52,7.58,60,8.01,75,8.9,90,10.13,110,11.87,120,12.02,135,14.33,150,15.89,150.5,15.821118

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.94	6.16	6.28	6.17	6.23	6.13	5.54	4.69
8	6.6	6.76	6.88	6.84	7.04	7.04	6.68	5.86
10	6.91	7.13	7.37	7.41	7.6	7.79	7.54	6.69
12	7.1	7.37	7.76	7.96	8.05	8.42	8.47	7.51
14	7.25	7.55	8.03	8.45	8.5	9.01	9.52	8.38
16	7.37	7.7	8.27	8.87	8.95	9.59	10.61	9.51
20	7.54	7.92	8.66	9.58	10.41	10.76	12.51	12.72
24	7.58	8.01	8.9	10.13	11.87	12.02	14.33	15.89

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	40.6°	4.02	143.6°	4.06
8	37.5°	4.71	147.8°	5.07
10	35.6°	5.02	149.6°	5.79
12	35°	5.18	149°	6.5
14	35°	5.27	145.9°	7.26
16	35°	5.34	145.2°	8.24
20	35°	5.41	146.9°	11.01
24	35.2°	5.35	150.5°	13.77

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