WINDHOVER: ORC Rating

GPH

639.9

OSN

622.8

LOA

12.47 m

Displacement

3923 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6217

Medium

0.8465

High

0.9647

Triple Offshore

Low

0.8133

Medium

1.0644

High

1.1837

Boat Specifications

Dimensions

Length overall: 12.47 m
Beam: 2.53 m
Draft: 1.51 m
Displacement: 3923 kg
Crew weight: 425 kg
Wetted surface: 23.36 m²

Sails

Mainsail: 24.09 m²
Genoa: 37.95 m²
Spinnaker: 73.76 m²
Asymmetric spinnaker: 72.25 m²

Design

Type: Swede 41
Builder: Fisksatra
Designer: Knut Reimer
Year built: 1974

Performance data

Polar CSV

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

6,44.6,4.592529,52,5.1,60,5.46,75,5.78,90,5.73,110,5.42,120,5.26,135,4.74,145,4.199465,150,3.97
8,43.5,5.541966,52,6.18,60,6.56,75,6.84,90,6.85,110,6.73,120,6.57,135,6,148,5.200177,150,5.1
10,43.3,6.100805,52,6.77,60,7.1,75,7.34,90,7.41,110,7.45,120,7.39,135,7.03,148,6.273229,150,6.15
12,42.8,6.310224,52,6.98,60,7.27,75,7.58,90,7.72,110,7.85,120,7.85,135,7.59,150,7.03,153.5,6.849664
14,42.4,6.378179,52,7.06,60,7.35,75,7.71,90,7.99,110,8.14,120,8.32,135,8.07,150,7.56,162,7.09737
16,42.8,6.432885,52,7.1,60,7.39,75,7.79,90,8.21,110,8.4,120,8.75,135,8.62,150,8,180,7.31
20,43.1,6.519099,52,7.16,60,7.43,75,7.85,90,8.43,110,8.8,120,9.34,135,9.86,150,9.07,180,8.17

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.1	5.46	5.78	5.73	5.42	5.26	4.74	3.97
8	6.18	6.56	6.84	6.85	6.73	6.57	6	5.1
10	6.77	7.1	7.34	7.41	7.45	7.39	7.03	6.15
12	6.98	7.27	7.58	7.72	7.85	7.85	7.59	7.03
14	7.06	7.35	7.71	7.99	8.14	8.32	8.07	7.56
16	7.1	7.39	7.79	8.21	8.4	8.75	8.62	8
20	7.16	7.43	7.85	8.43	8.8	9.34	9.86	9.07

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.6°	3.27	145°	3.44
8	43.5°	4.02	148°	4.41
10	43.3°	4.44	148°	5.32
12	42.8°	4.63	153.5°	6.13
14	42.4°	4.71	162°	6.75
16	42.8°	4.72	180°	7.31
20	43.1°	4.76	180°	8.17

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	6.18	6.77	6.98	7.06	7.10	7.16
60°	5.46	6.56	7.10	7.27	7.35	7.39	7.43
75°	5.78	6.84	7.34	7.58	7.71	7.79	7.85
90°	5.73	6.85	7.41	7.72	7.99	8.21	8.43
110°	5.42	6.73	7.45	7.85	8.14	8.40	8.80
120°	5.26	6.57	7.39	7.85	8.32	8.75	9.34
135°	4.74	6.00	7.03	7.59	8.07	8.62	9.86
150°	3.97	5.10	6.15	7.03	7.56	8.00	9.07