WINDFALL: ORC Rating

GPH

673.8

OSN

653.4

LOA

11.38 m

Displacement

7723 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5848

Medium

0.8129

High

0.9631

Triple Offshore

Low

0.7617

Medium

1.0114

High

1.1515

Boat Specifications

Dimensions

Length overall: 11.38 m
Beam: 3.78 m
Draft: 1.88 m
Displacement: 7723 kg
Crew weight: 643 kg
Wetted surface: 31.26 m²

Sails

Mainsail: 39.65 m²
Genoa: 39.02 m²
Spinnaker: 89.58 m²
Asymmetric spinnaker: 0 m²

Design

Type: Typhoon 37
Builder: Westerley Yachts
Designer: Dubois
Year built: 1990

Performance data

Polar CSV

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

6,44.2,4.268315,52,4.74,60,5.06,75,5.32,90,5.28,110,5.21,120,5.05,135,4.55,147,3.922875,150,3.8
8,42.4,5.010459,52,5.63,60,5.96,75,6.27,90,6.25,110,6.34,120,6.16,135,5.59,150,4.83,151,4.790654
10,42.4,5.674006,52,6.35,60,6.63,75,6.82,90,6.91,110,7.01,120,6.92,135,6.56,150,5.773503
12,42.4,6.215677,52,6.76,60,6.95,75,7.12,90,7.26,110,7.38,120,7.31,135,7.07,150,6.61,155,6.366491
14,41.1,6.383006,52,6.96,60,7.15,75,7.33,90,7.47,110,7.69,120,7.64,135,7.41,150,7.07,173,6.458138
16,40.1,6.432033,52,7.05,60,7.26,75,7.51,90,7.63,110,8.01,120,7.99,135,7.74,150,7.39,180,6.92
20,39.8,6.494998,52,7.13,60,7.36,75,7.74,90,8.04,110,8.43,120,8.65,135,8.44,150,8.01,180,7.55

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.74	5.06	5.32	5.28	5.21	5.05	4.55	3.8
8	5.63	5.96	6.27	6.25	6.34	6.16	5.59	4.83
10	6.35	6.63	6.82	6.91	7.01	6.92	6.56	5.77
12	6.76	6.95	7.12	7.26	7.38	7.31	7.07	6.61
14	6.96	7.15	7.33	7.47	7.69	7.64	7.41	7.07
16	7.05	7.26	7.51	7.63	8.01	7.99	7.74	7.39
20	7.13	7.36	7.74	8.04	8.43	8.65	8.44	8.01

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.2°	3.06	147°	3.29
8	42.4°	3.7	151°	4.19
10	42.4°	4.19	150°	5
12	42.4°	4.59	155°	5.77
14	41.1°	4.81	173°	6.41
16	40.1°	4.92	180°	6.92
20	39.8°	4.99	180°	7.55

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°	4.74	5.63	6.35	6.76	6.96	7.05	7.13
60°	5.06	5.96	6.63	6.95	7.15	7.26	7.36
75°	5.32	6.27	6.82	7.12	7.33	7.51	7.74
90°	5.28	6.25	6.91	7.26	7.47	7.63	8.04
110°	5.21	6.34	7.01	7.38	7.69	8.01	8.43
120°	5.05	6.16	6.92	7.31	7.64	7.99	8.65
135°	4.55	5.59	6.56	7.07	7.41	7.74	8.44
150°	3.80	4.83	5.77	6.61	7.07	7.39	8.01