Teragram: ORC Rating

GPH

668.9

OSN

650.7

LOA

11.942 m

Displacement

8601 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6144

Medium

0.8129

High

0.9314

Triple Offshore

Low

0.7874

Medium

1.0107

High

1.1253

Boat Specifications

Dimensions

Length overall: 11.942 m
Beam: 3.29 m
Draft: 1.98 m
Displacement: 8601 kg
Crew weight: 350 kg
Wetted surface: 29.29 m²

Sails

Mainsail: 36.18 m²
Genoa: 52.23 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 93.22 m²

Design

Type: Swan 40
Builder: Nautor
Designer: Sparkman&Stephens
Year built: 1971
Stability index: 140.3

Performance data

Polar CSV

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

6,43.2,4.540662,52,5.03,60,5.27,75,5.43,90,5.35,110,5.19,120,5.04,135,4.57,145.7,4.091523,150,3.9
8,41.2,5.263054,52,5.88,60,6.11,75,6.28,90,6.23,110,6.24,120,6.09,135,5.63,147.1,5.073725,150,4.92
10,40.6,5.79503,52,6.44,60,6.64,75,6.8,90,6.8,110,6.92,120,6.83,135,6.48,147.1,5.931256,150,5.75
12,40.6,6.111123,52,6.74,60,6.94,75,7.1,90,7.15,110,7.32,120,7.27,135,7.03,147.3,6.571514,150,6.38
14,40,6.239847,52,6.89,60,7.09,75,7.29,90,7.38,110,7.61,120,7.6,135,7.41,150,6.81,170.3,5.995718
16,39.6,6.307484,52,6.98,60,7.18,75,7.42,90,7.57,110,7.84,120,7.89,135,7.73,150,7.14,172.1,6.521896
20,39.6,6.411311,52,7.06,60,7.27,75,7.58,90,7.82,110,8.13,120,8.37,135,8.31,150,7.65,174.8,7.229755

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.03	5.27	5.43	5.35	5.19	5.04	4.57	3.9
8	5.88	6.11	6.28	6.23	6.24	6.09	5.63	4.92
10	6.44	6.64	6.8	6.8	6.92	6.83	6.48	5.75
12	6.74	6.94	7.1	7.15	7.32	7.27	7.03	6.38
14	6.89	7.09	7.29	7.38	7.61	7.6	7.41	6.81
16	6.98	7.18	7.42	7.57	7.84	7.89	7.73	7.14
20	7.06	7.27	7.58	7.82	8.13	8.37	8.31	7.65

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.2°	3.31	145.7°	3.38
8	41.2°	3.96	147.1°	4.26
10	40.6°	4.4	147.1°	4.98
12	40.6°	4.64	147.3°	5.53
14	40°	4.78	170.3°	5.91
16	39.6°	4.86	172.1°	6.46
20	39.6°	4.94	174.8°	7.2

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°	5.03	5.88	6.44	6.74	6.89	6.98	7.06
60°	5.27	6.11	6.64	6.94	7.09	7.18	7.27
75°	5.43	6.28	6.80	7.10	7.29	7.42	7.58
90°	5.35	6.23	6.80	7.15	7.38	7.57	7.82
110°	5.19	6.24	6.92	7.32	7.61	7.84	8.13
120°	5.04	6.09	6.83	7.27	7.60	7.89	8.37
135°	4.57	5.63	6.48	7.03	7.41	7.73	8.31
150°	3.90	4.92	5.75	6.38	6.81	7.14	7.65