BIRIKO': ORC Rating

GPH

642.4

OSN

625.6

LOA

10.3 m

Displacement

5175 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6188

Medium

0.8518

High

0.9899

Triple Offshore

Low

0.8116

Medium

1.0553

High

1.1876

Boat Specifications

Dimensions

Length overall: 10.3 m
Beam: 3.48 m
Draft: 1.9 m
Displacement: 5175 kg
Crew weight: 590 kg
Wetted surface: 25.11 m²

Sails

Mainsail: 32.07 m²
Genoa: 32.84 m²
Spinnaker: 72 m²
Asymmetric spinnaker: 85.98 m²

Design

Type: Dufour 34 mod.
Builder: Dufour Yachts
Designer: Felci
Year built: 2003

Performance data

Polar CSV

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

6,43.5,4.439087,52,4.97,60,5.39,75,5.88,90,6,110,5.55,120,5.37,135,4.84,145,4.297127,150,4.07
8,41.6,5.201939,52,5.95,60,6.4,75,6.78,90,6.86,110,6.66,120,6.51,135,5.94,147.8,5.235211,150,5.11
10,41.4,5.905792,52,6.61,60,6.92,75,7.18,90,7.25,110,7.21,120,7.13,135,6.81,149,6.124825,150,6.06
12,40.1,6.314374,52,6.93,60,7.14,75,7.43,90,7.55,110,7.58,120,7.51,135,7.27,150,6.84,157,6.529026
14,39,6.433798,52,7.1,60,7.28,75,7.6,90,7.84,110,7.96,120,7.91,135,7.63,150,7.26,174,6.656465
16,39,6.536739,52,7.17,60,7.37,75,7.72,90,8.1,110,8.31,120,8.34,135,8.03,150,7.59,180,7.1
20,39.8,6.599126,52,7.21,60,7.43,75,7.87,90,8.42,110,8.75,120,9.14,135,8.92,150,8.36,180,7.76

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.97	5.39	5.88	6	5.55	5.37	4.84	4.07
8	5.95	6.4	6.78	6.86	6.66	6.51	5.94	5.11
10	6.61	6.92	7.18	7.25	7.21	7.13	6.81	6.06
12	6.93	7.14	7.43	7.55	7.58	7.51	7.27	6.84
14	7.1	7.28	7.6	7.84	7.96	7.91	7.63	7.26
16	7.17	7.37	7.72	8.1	8.31	8.34	8.03	7.59
20	7.21	7.43	7.87	8.42	8.75	9.14	8.92	8.36

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	3.22	145°	3.52
8	41.6°	3.89	147.8°	4.43
10	41.4°	4.43	149°	5.25
12	40.1°	4.83	157°	6.01
14	39°	5	174°	6.62
16	39°	5.08	180°	7.1
20	39.8°	5.07	180°	7.76

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°	4.97	5.95	6.61	6.93	7.10	7.17	7.21
60°	5.39	6.40	6.92	7.14	7.28	7.37	7.43
75°	5.88	6.78	7.18	7.43	7.60	7.72	7.87
90°	6.00	6.86	7.25	7.55	7.84	8.10	8.42
110°	5.55	6.66	7.21	7.58	7.96	8.31	8.75
120°	5.37	6.51	7.13	7.51	7.91	8.34	9.14
135°	4.84	5.94	6.81	7.27	7.63	8.03	8.92
150°	4.07	5.11	6.06	6.84	7.26	7.59	8.36