WINDFALL: ORC Rating

GPH

677.7

OSN

655.8

LOA

11.38 m

Displacement

7722 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5794

Medium

0.8099

High

0.9641

Triple Offshore

Low

0.7539

Medium

1.0076

High

1.1498

Boat Specifications

Dimensions

Length overall: 11.38 m
Beam: 3.78 m
Draft: 1.88 m
Displacement: 7722 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
Stability index: 124.2

Performance data

Polar CSV

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

6,44.8,4.242001,52,4.67,60,4.99,75,5.23,90,5.18,110,5.18,120,5.03,135,4.51,146,3.944333,150,3.78
8,42.9,4.982643,52,5.56,60,5.89,75,6.18,90,6.18,110,6.32,120,6.13,135,5.56,150,4.82,151.1,4.774608
10,42.4,5.606297,52,6.3,60,6.58,75,6.78,90,6.9,110,7,120,6.9,135,6.54,150,5.76,150.2,5.750402
12,42.4,6.175052,52,6.73,60,6.92,75,7.09,90,7.26,110,7.37,120,7.3,135,7.06,150,6.61,155.6,6.34688
14,41.1,6.383006,52,6.95,60,7.13,75,7.3,90,7.47,110,7.68,120,7.63,135,7.4,150,7.07,167.6,6.552863
16,40,6.448712,52,7.06,60,7.26,75,7.48,90,7.59,110,8,120,7.98,135,7.73,150,7.4,177.2,6.908247
20,39.9,6.543571,52,7.14,60,7.37,75,7.74,90,8,110,8.43,120,8.63,135,8.44,150,8.03,179,7.531147

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.67	4.99	5.23	5.18	5.18	5.03	4.51	3.78
8	5.56	5.89	6.18	6.18	6.32	6.13	5.56	4.82
10	6.3	6.58	6.78	6.9	7	6.9	6.54	5.76
12	6.73	6.92	7.09	7.26	7.37	7.3	7.06	6.61
14	6.95	7.13	7.3	7.47	7.68	7.63	7.4	7.07
16	7.06	7.26	7.48	7.59	8	7.98	7.73	7.4
20	7.14	7.37	7.74	8	8.43	8.63	8.44	8.03

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.8°	3.01	146°	3.27
8	42.9°	3.65	151.1°	4.18
10	42.4°	4.14	150.2°	4.99
12	42.4°	4.56	155.6°	5.78
14	41.1°	4.81	167.6°	6.4
16	40°	4.94	177.2°	6.9
20	39.9°	5.02	179°	7.53

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°	4.67	5.56	6.30	6.73	6.95	7.06	7.14
60°	4.99	5.89	6.58	6.92	7.13	7.26	7.37
75°	5.23	6.18	6.78	7.09	7.30	7.48	7.74
90°	5.18	6.18	6.90	7.26	7.47	7.59	8.00
110°	5.18	6.32	7.00	7.37	7.68	8.00	8.43
120°	5.03	6.13	6.90	7.30	7.63	7.98	8.63
135°	4.51	5.56	6.54	7.06	7.40	7.73	8.44
150°	3.78	4.82	5.76	6.61	7.07	7.40	8.03