GWAIHIR VENTURI: ORC Rating

GPH

662.1

OSN

640.6

LOA

10.3 m

Displacement

5700 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6009

Medium

0.8329

High

0.9744

Triple Offshore

Low

0.7782

Medium

1.0292

High

1.1611

Boat Specifications

Dimensions

Length overall: 10.3 m
Beam: 3.48 m
Draft: 1.95 m
Displacement: 5700 kg
Crew weight: 641 kg
Wetted surface: 25.73 m²

Sails

Mainsail: 31.29 m²
Genoa: 33.26 m²
Spinnaker: 80.91 m²
Asymmetric spinnaker: 0 m²

Design

Type: DUFOUR 34 2003 GTE
Builder: DUFOUR YACHTS
Designer: FELCI Umberto
Year built: 2002
Stability index: 110.4

Performance data

Polar CSV

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

6,43.6,4.322178,52,4.84,60,5.14,75,5.36,90,5.29,110,5.3,120,5.15,135,4.67,146,4.101141,150,3.92
8,41.8,5.084,52,5.74,60,6.06,75,6.32,90,6.29,110,6.44,120,6.28,135,5.74,150,4.98,150.5,4.963488
10,41.8,5.781541,52,6.44,60,6.69,75,6.87,90,6.97,110,7.09,120,7.01,135,6.66,150,5.92,150.2,5.911736
12,40.6,6.216487,52,6.84,60,7.02,75,7.17,90,7.29,110,7.45,120,7.39,135,7.16,150,6.72,156.5,6.422698
14,39.6,6.372376,52,7.03,60,7.2,75,7.38,90,7.44,110,7.77,120,7.74,135,7.5,150,7.17,166.4,6.677223
16,39.3,6.461282,52,7.1,60,7.3,75,7.55,90,7.66,110,8.07,120,8.12,135,7.86,150,7.49,177.2,6.998355
20,39.4,6.483477,52,7.15,60,7.36,75,7.73,90,8.07,110,8.42,120,8.79,135,8.66,150,8.18,179,7.621161

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.84	5.14	5.36	5.29	5.3	5.15	4.67	3.92
8	5.74	6.06	6.32	6.29	6.44	6.28	5.74	4.98
10	6.44	6.69	6.87	6.97	7.09	7.01	6.66	5.92
12	6.84	7.02	7.17	7.29	7.45	7.39	7.16	6.72
14	7.03	7.2	7.38	7.44	7.77	7.74	7.5	7.17
16	7.1	7.3	7.55	7.66	8.07	8.12	7.86	7.49
20	7.15	7.36	7.73	8.07	8.42	8.79	8.66	8.18

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.6°	3.13	146°	3.4
8	41.8°	3.79	150.5°	4.32
10	41.8°	4.31	150.2°	5.13
12	40.6°	4.72	156.5°	5.89
14	39.6°	4.91	166.4°	6.49
16	39.3°	5	177.2°	6.99
20	39.4°	5.01	179°	7.62

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°	4.84	5.74	6.44	6.84	7.03	7.10	7.15
60°	5.14	6.06	6.69	7.02	7.20	7.30	7.36
75°	5.36	6.32	6.87	7.17	7.38	7.55	7.73
90°	5.29	6.29	6.97	7.29	7.44	7.66	8.07
110°	5.30	6.44	7.09	7.45	7.77	8.07	8.42
120°	5.15	6.28	7.01	7.39	7.74	8.12	8.79
135°	4.67	5.74	6.66	7.16	7.50	7.86	8.66
150°	3.92	4.98	5.92	6.72	7.17	7.49	8.18