MANDRAKE: ORC Rating

GPH

493.4

OSN

483.9

LOA

18.86 m

Displacement

23413 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.8451

Medium

1.095

High

1.2361

Triple Offshore

Low

1.0931

Medium

1.3575

High

1.4927

Boat Specifications

Dimensions

Length overall: 18.86 m
Beam: 5.34 m
Draft: 2.86 m
Displacement: 23413 kg
Crew weight: 600 kg
Wetted surface: 61.99 m²

Sails

Mainsail: 113.08 m²
Genoa: 142.5 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 284.91 m²

Design

Type: SWAN 60 SD
Builder: NAUTOR
Designer: FRERS
Year built: 1994
Stability index: 131.4

Performance data

Polar CSV

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

6,43,6.494805,52,7.23,60,7.64,75,7.94,90,7.86,110,7.15,120,6.88,135,6.22,142.4,5.704984,150,5.22
8,41.2,7.336378,52,8.21,60,8.56,75,8.82,90,8.79,110,8.42,120,8.3,135,7.65,145.2,6.917135,150,6.55
10,39.6,7.735104,52,8.67,60,8.97,75,9.25,90,9.3,110,9.2,120,9.14,135,8.7,148.9,7.777947,150,7.7
12,38.8,7.981133,52,8.92,60,9.19,75,9.49,90,9.62,110,9.65,120,9.66,135,9.36,150,8.61,150.5,8.571208
14,38.2,8.143976,52,9.07,60,9.33,75,9.65,90,9.87,110,9.91,120,10.08,135,9.85,150,9.21,151,9.123965
16,37.6,8.229314,52,9.18,60,9.43,75,9.77,90,10.06,110,10.14,120,10.43,135,10.31,150,9.61,152,9.445634
20,38.1,8.412385,52,9.3,60,9.56,75,9.94,90,10.34,110,10.51,120,10.95,135,11.26,150,10.3,175.7,9.376393

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	7.23	7.64	7.94	7.86	7.15	6.88	6.22	5.22
8	8.21	8.56	8.82	8.79	8.42	8.3	7.65	6.55
10	8.67	8.97	9.25	9.3	9.2	9.14	8.7	7.7
12	8.92	9.19	9.49	9.62	9.65	9.66	9.36	8.61
14	9.07	9.33	9.65	9.87	9.91	10.08	9.85	9.21
16	9.18	9.43	9.77	10.06	10.14	10.43	10.31	9.61
20	9.3	9.56	9.94	10.34	10.51	10.95	11.26	10.3

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	4.75	142.4°	4.52
8	41.2°	5.52	145.2°	5.68
10	39.6°	5.96	148.9°	6.66
12	38.8°	6.22	150.5°	7.46
14	38.2°	6.4	151°	7.98
16	37.6°	6.52	152°	8.34
20	38.1°	6.62	175.7°	9.35

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°	7.23	8.21	8.67	8.92	9.07	9.18	9.30
60°	7.64	8.56	8.97	9.19	9.33	9.43	9.56
75°	7.94	8.82	9.25	9.49	9.65	9.77	9.94
90°	7.86	8.79	9.30	9.62	9.87	10.06	10.34
110°	7.15	8.42	9.20	9.65	9.91	10.14	10.51
120°	6.88	8.30	9.14	9.66	10.08	10.43	10.95
135°	6.22	7.65	8.70	9.36	9.85	10.31	11.26
150°	5.22	6.55	7.70	8.61	9.21	9.61	10.30