COCOMERO & CHAMPAGNE: ORC Rating

GPH

602.3

OSN

588.1

LOA

6.45 m

Displacement

340 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6907

Medium

0.8766

High

1.0454

Triple Offshore

Low

0.8776

Medium

1.1095

High

1.3073

Boat Specifications

Dimensions

Length overall: 6.45 m
Beam: 2.42 m
Draft: 1.4 m
Displacement: 340 kg
Crew weight: 240 kg
Wetted surface: 7.22 m²

Sails

Mainsail: 15.44 m²
Genoa: 7.62 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 38 m²

Design

Type: Viper 640
Builder: Rondar Raceboats
Designer: Brian Bennett
Year built: 1993
Stability index: 110.6

Performance data

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into Offwind or compatible navigation software.

6,43.5,4.949169,52,5.45,60,5.67,75,5.81,90,5.87,110,5.96,120,5.85,135,5.45,142.8,5.021782,150,4.62
8,38.7,5.445713,52,6.09,60,6.4,75,6.73,90,6.66,110,7.06,120,7.09,135,6.47,150,5.71,150.5,5.68733
10,37.5,5.546079,52,6.35,60,6.74,75,7.43,90,7.88,110,7.77,120,8.12,135,7.85,145.2,6.953669,150,6.59
12,37.6,5.604011,52,6.46,60,6.92,75,7.76,90,8.57,110,8.44,120,8.9,135,9.37,141.5,8.727228,150,7.88
14,37.5,5.722545,52,6.68,60,7.14,75,7.98,90,8.99,110,9.69,120,9.66,135,10.49,142,10.329808,150,9.4
16,38.1,5.807341,52,6.82,60,7.4,75,8.42,90,9.3,110,10.67,120,10.39,135,11.56,144.7,11.885251,150,11.2
20,39.1,5.901709,52,6.96,60,7.63,75,8.89,90,10.18,110,11.82,120,12.75,135,13.37,149.8,14.266296,150,14.24

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.45	5.67	5.81	5.87	5.96	5.85	5.45	4.62
8	6.09	6.4	6.73	6.66	7.06	7.09	6.47	5.71
10	6.35	6.74	7.43	7.88	7.77	8.12	7.85	6.59
12	6.46	6.92	7.76	8.57	8.44	8.9	9.37	7.88
14	6.68	7.14	7.98	8.99	9.69	9.66	10.49	9.4
16	6.82	7.4	8.42	9.3	10.67	10.39	11.56	11.2
20	6.96	7.63	8.89	10.18	11.82	12.75	13.37	14.24

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	3.59	142.8°	4
8	38.7°	4.25	150.5°	4.95
10	37.5°	4.4	145.2°	5.71
12	37.6°	4.44	141.5°	6.83
14	37.5°	4.54	142°	8.14
16	38.1°	4.57	144.7°	9.7
20	39.1°	4.58	149.8°	12.33

VPP POLAR · BOAT SPEED BY TWAKT

TRUE WIND ANGLE —

READ AT ANGLE

Hover or tap the chart, or use the slider, to read boat speeds.

True wind speed 6 kt8 kt10 kt12 kt14 kt16 kt20 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 6 kt (kt)	Boat speed in 8 kt (kt)	Boat speed in 10 kt (kt)	Boat speed in 12 kt (kt)	Boat speed in 14 kt (kt)	Boat speed in 16 kt (kt)	Boat speed in 20 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	5.45	6.09	6.35	6.46	6.68	6.82	6.96
60°	5.67	6.40	6.74	6.92	7.14	7.40	7.63
75°	5.81	6.73	7.43	7.76	7.98	8.42	8.89
90°	5.87	6.66	7.88	8.57	8.99	9.30	10.18
110°	5.96	7.06	7.77	8.44	9.69	10.67	11.82
120°	5.85	7.09	8.12	8.90	9.66	10.39	12.75
135°	5.45	6.47	7.85	9.37	10.49	11.56	13.37
150°	4.62	5.71	6.59	7.88	9.40	11.20	14.24