YAK: ORC Rating

GPH

678.8

OSN

667.5

LOA

6.5 m

Displacement

1000 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6497

Medium

0.7851

High

0.9159

Triple Offshore

Low

0.8159

Medium

0.9665

High

1.1032

Boat Specifications

Dimensions

Length overall: 6.5 m
Beam: 3 m
Draft: 1.6 m
Displacement: 1000 kg
Crew weight: 180 kg
Wetted surface: 11.1 m²

Sails

Mainsail: 24.72 m²
Genoa: 14.95 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 70.01 m²

Design

Type: Twister 650
Builder: Gardoni
Designer: Cossutti
Year built: 2004
Stability index: 113.4

Performance data

Polar CSV

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

6,42.6,4.727637,52,5.21,60,5.41,75,5.55,90,5.58,110,5.48,120,5.4,135,5,146.9,4.464506,150,4.32
8,38.8,5.094067,52,5.64,60,5.81,75,6.01,90,6.01,110,6.13,120,6.05,135,5.73,150,5.26,150.5,5.239237
10,37,5.233927,52,5.79,60,6.02,75,6.37,90,6.51,110,6.6,120,6.76,135,6.4,150,5.78,150.1,5.7677
12,36.6,5.2814,52,5.89,60,6.15,75,6.54,90,6.86,110,6.95,120,7.29,135,7.13,147.5,6.509433,150,6.33
14,36.6,5.34368,52,5.95,60,6.26,75,6.66,90,7.08,110,7.28,120,7.75,135,8.16,144.1,7.468752,150,6.99
16,37,5.396705,52,6.02,60,6.28,75,6.75,90,7.26,110,7.84,120,8.29,135,9.5,137.7,9.477698,150,8.09
20,37.8,5.429314,52,6.06,60,6.36,75,6.96,90,7.47,110,8.9,120,9.41,135,11.28,145.7,12.46825,150,11.89

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.21	5.41	5.55	5.58	5.48	5.4	5	4.32
8	5.64	5.81	6.01	6.01	6.13	6.05	5.73	5.26
10	5.79	6.02	6.37	6.51	6.6	6.76	6.4	5.78
12	5.89	6.15	6.54	6.86	6.95	7.29	7.13	6.33
14	5.95	6.26	6.66	7.08	7.28	7.75	8.16	6.99
16	6.02	6.28	6.75	7.26	7.84	8.29	9.5	8.09
20	6.06	6.36	6.96	7.47	8.9	9.41	11.28	11.89

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.48	146.9°	3.74
8	38.8°	3.97	150.5°	4.56
10	37°	4.18	150.1°	5
12	36.6°	4.24	147.5°	5.49
14	36.6°	4.29	144.1°	6.05
16	37°	4.31	137.7°	7.01
20	37.8°	4.29	145.7°	10.3

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°	5.21	5.64	5.79	5.89	5.95	6.02	6.06
60°	5.41	5.81	6.02	6.15	6.26	6.28	6.36
75°	5.55	6.01	6.37	6.54	6.66	6.75	6.96
90°	5.58	6.01	6.51	6.86	7.08	7.26	7.47
110°	5.48	6.13	6.60	6.95	7.28	7.84	8.90
120°	5.40	6.05	6.76	7.29	7.75	8.29	9.41
135°	5.00	5.73	6.40	7.13	8.16	9.50	11.28
150°	4.32	5.26	5.78	6.33	6.99	8.09	11.89