YAK: ORC Rating

GPH

669

OSN

654

LOA

6.5 m

Displacement

1000 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6546

Medium

0.8086

High

0.928

Triple Offshore

Low

0.8173

Medium

0.9864

High

1.1357

Boat Specifications

Dimensions

Length overall: 6.5 m
Beam: 3 m
Draft: 1.6 m
Displacement: 1000 kg
Crew weight: 200 kg
Wetted surface: 11.16 m²

Sails

Mainsail: 25.14 m²
Genoa: 14.74 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 67.89 m²

Design

Type: Twister 650
Builder: Crack Boat
Designer: Cossutti
Year built: 2004
Stability index: 112.7

Performance data

Polar CSV

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

6,40.2,4.569283,52,5.1,60,5.26,75,5.45,90,5.52,110,5.46,120,5.38,135,5.03,142.4,4.745739,150,4.34
8,37.8,5.112921,52,5.62,60,5.74,75,5.96,90,6.06,110,6.14,120,6.08,135,5.78,150,5.26,152.3,5.161546
10,36,5.315092,52,5.93,60,6.1,75,6.33,90,6.57,110,6.7,120,6.73,135,6.41,150,5.85,161,5.467899
12,35.8,5.400315,52,6.08,60,6.3,75,6.61,90,6.97,110,7.12,120,7.42,135,7.06,150,6.46,167.6,5.846383
14,36,5.438699,52,6.16,60,6.42,75,6.83,90,7.25,110,7.71,120,8.05,135,7.98,150,7.05,173,6.266711
16,36.5,5.473611,52,6.2,60,6.49,75,6.97,90,7.53,110,8.6,120,8.68,135,9.64,137,9.407213,150,7.94
20,37.6,5.528281,52,6.25,60,6.56,75,7.17,90,8.08,110,10.04,120,11.23,135,12.14,144.4,12.532272,150,11.76

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.1	5.26	5.45	5.52	5.46	5.38	5.03	4.34
8	5.62	5.74	5.96	6.06	6.14	6.08	5.78	5.26
10	5.93	6.1	6.33	6.57	6.7	6.73	6.41	5.85
12	6.08	6.3	6.61	6.97	7.12	7.42	7.06	6.46
14	6.16	6.42	6.83	7.25	7.71	8.05	7.98	7.05
16	6.2	6.49	6.97	7.53	8.6	8.68	9.64	7.94
20	6.25	6.56	7.17	8.08	10.04	11.23	12.14	11.76

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	40.2°	3.49	142.4°	3.76
8	37.8°	4.04	152.3°	4.57
10	36°	4.3	161°	5.17
12	35.8°	4.38	167.6°	5.71
14	36°	4.4	173°	6.22
16	36.5°	4.4	137°	6.88
20	37.6°	4.38	144.4°	10.19

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°	5.10	5.62	5.93	6.08	6.16	6.20	6.25
60°	5.26	5.74	6.10	6.30	6.42	6.49	6.56
75°	5.45	5.96	6.33	6.61	6.83	6.97	7.17
90°	5.52	6.06	6.57	6.97	7.25	7.53	8.08
110°	5.46	6.14	6.70	7.12	7.71	8.60	10.04
120°	5.38	6.08	6.73	7.42	8.05	8.68	11.23
135°	5.03	5.78	6.41	7.06	7.98	9.64	12.14
150°	4.34	5.26	5.85	6.46	7.05	7.94	11.76