GWAIHIR VENTURI: ORC Rating

GPH

620.8

OSN

599.9

LOA

9.95 m

Displacement

3966 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6587

Medium

0.8981

High

1.0299

Triple Offshore

Low

0.8444

Medium

1.0914

High

1.2234

Boat Specifications

Dimensions

Length overall: 9.95 m
Beam: 3.41 m
Draft: 2.11 m
Displacement: 3966 kg
Crew weight: 565 kg
Wetted surface: 24 m²

Sails

Mainsail: 33.75 m²
Genoa: 27.06 m²
Spinnaker: 91.86 m²
Asymmetric spinnaker: 73.91 m²

Design

Type: J 99
Builder: J COMPOSITES
Designer: JOHNSTONE
Year built: 2019

Performance data

Polar CSV

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

6,43,4.730953,52,5.25,60,5.51,75,5.66,90,5.68,110,5.73,120,5.57,135,5.03,143.5,4.565489,150,4.23
8,40.9,5.609553,52,6.23,60,6.44,75,6.57,90,6.71,110,6.81,120,6.69,135,6.22,148.2,5.494811,150,5.39
10,39,6.163578,52,6.79,60,6.94,75,7.06,90,7.22,110,7.36,120,7.3,135,6.98,150,6.35,152.1,6.246
12,37.3,6.423847,52,7.09,60,7.24,75,7.37,90,7.53,110,7.77,120,7.76,135,7.48,150,7.02,158.6,6.669847
14,37,6.561191,52,7.23,60,7.41,75,7.62,90,7.7,110,8.15,120,8.19,135,7.94,150,7.48,171.8,6.850033
16,36.7,6.6228,52,7.31,60,7.51,75,7.81,90,7.95,110,8.47,120,8.63,135,8.41,150,7.91,177.2,7.258666
20,36.9,6.690137,52,7.38,60,7.61,75,8.01,90,8.39,110,8.97,120,9.62,135,9.68,150,8.86,177.7,8.05649
24,37.8,6.694889,52,7.39,60,7.65,75,8.13,90,8.66,110,9.36,120,10.63,135,12.2,142.8,11.688199,150,10.75

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.25	5.51	5.66	5.68	5.73	5.57	5.03	4.23
8	6.23	6.44	6.57	6.71	6.81	6.69	6.22	5.39
10	6.79	6.94	7.06	7.22	7.36	7.3	6.98	6.35
12	7.09	7.24	7.37	7.53	7.77	7.76	7.48	7.02
14	7.23	7.41	7.62	7.7	8.15	8.19	7.94	7.48
16	7.31	7.51	7.81	7.95	8.47	8.63	8.41	7.91
20	7.38	7.61	8.01	8.39	8.97	9.62	9.68	8.86
24	7.39	7.65	8.13	8.66	9.36	10.63	12.2	10.75

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.46	143.5°	3.67
8	40.9°	4.24	148.2°	4.67
10	39°	4.79	152.1°	5.52
12	37.3°	5.11	158.6°	6.21
14	37°	5.24	171.8°	6.78
16	36.7°	5.31	177.2°	7.25
20	36.9°	5.35	177.7°	8.05
24	37.8°	5.29	142.8°	9.31

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 kt24 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)	Boat speed in 24 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	5.25	6.23	6.79	7.09	7.23	7.31	7.38	7.39
60°	5.51	6.44	6.94	7.24	7.41	7.51	7.61	7.65
75°	5.66	6.57	7.06	7.37	7.62	7.81	8.01	8.13
90°	5.68	6.71	7.22	7.53	7.70	7.95	8.39	8.66
110°	5.73	6.81	7.36	7.77	8.15	8.47	8.97	9.36
120°	5.57	6.69	7.30	7.76	8.19	8.63	9.62	10.63
135°	5.03	6.22	6.98	7.48	7.94	8.41	9.68	12.20
150°	4.23	5.39	6.35	7.02	7.48	7.91	8.86	10.75