ALKYON: ORC Rating

GPH

868.4

OSN

852

LOA

6.55 m

Displacement

1256 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.4624

Medium

0.611

High

0.6986

Triple Offshore

Low

0.6072

Medium

0.7767

High

0.8699

Boat Specifications

Dimensions

Length overall: 6.55 m
Beam: 2.59 m
Draft: 0.93 m
Displacement: 1256 kg
Crew weight: 285 kg
Wetted surface: 10.58 m²

Sails

Mainsail: 9.76 m²
Genoa: 10.81 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 42.87 m²

Design

Type: EDEL 660
Builder: EDEL
Designer: Maurice Edel
Year built: 1975

Performance data

Polar CSV

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

6,47.6,3.247801,52,3.49,60,3.78,75,4.12,90,4.41,110,4.57,120,4.38,135,4.01,146.5,3.609607,150,3.48
8,47.2,3.841391,52,4.14,60,4.45,75,4.92,90,5.19,110,5.32,120,5.26,135,4.91,146,4.463006,150,4.27
10,48,4.363872,52,4.65,60,4.95,75,5.31,90,5.55,110,5.69,120,5.65,135,5.47,147,5.127162,150,4.97
12,47.4,4.698054,52,5,60,5.22,75,5.53,90,5.8,110,6.05,120,6.02,135,5.81,150,5.34,174,4.675613
14,46.1,4.845675,52,5.18,60,5.38,75,5.67,90,6.06,110,6.37,120,6.38,135,6.17,150,5.58,176,5.142527
16,45.9,4.957518,52,5.28,60,5.5,75,5.78,90,6.26,110,6.62,120,6.71,135,6.5,150,5.83,178,5.443316
20,48.4,5.000556,52,5.25,60,5.55,75,6.01,90,6.44,110,6.96,120,7.22,135,7.15,150,6.37,177,5.938138

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	3.49	3.78	4.12	4.41	4.57	4.38	4.01	3.48
8	4.14	4.45	4.92	5.19	5.32	5.26	4.91	4.27
10	4.65	4.95	5.31	5.55	5.69	5.65	5.47	4.97
12	5	5.22	5.53	5.8	6.05	6.02	5.81	5.34
14	5.18	5.38	5.67	6.06	6.37	6.38	6.17	5.58
16	5.28	5.5	5.78	6.26	6.62	6.71	6.5	5.83
20	5.25	5.55	6.01	6.44	6.96	7.22	7.15	6.37

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	47.6°	2.19	146.5°	3.01
8	47.2°	2.61	146°	3.7
10	48°	2.92	147°	4.3
12	47.4°	3.18	174°	4.65
14	46.1°	3.36	176°	5.13
16	45.9°	3.45	178°	5.44
20	48.4°	3.32	177°	5.93

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°	3.49	4.14	4.65	5.00	5.18	5.28	5.25
60°	3.78	4.45	4.95	5.22	5.38	5.50	5.55
75°	4.12	4.92	5.31	5.53	5.67	5.78	6.01
90°	4.41	5.19	5.55	5.80	6.06	6.26	6.44
110°	4.57	5.32	5.69	6.05	6.37	6.62	6.96
120°	4.38	5.26	5.65	6.02	6.38	6.71	7.22
135°	4.01	4.91	5.47	5.81	6.17	6.50	7.15
150°	3.48	4.27	4.97	5.34	5.58	5.83	6.37