Ilmarinen: ORC Rating

GPH

644.9

OSN

625.2

LOA

10.3 m

Displacement

5500 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6315

Medium

0.8573

High

0.9818

Triple Offshore

Low

0.8128

Medium

1.0513

High

1.17

Boat Specifications

Dimensions

Length overall: 10.3 m
Beam: 3.48 m
Draft: 1.94 m
Displacement: 5500 kg
Crew weight: 540 kg
Wetted surface: 25.21 m²

Sails

Mainsail: 34.85 m²
Genoa: 33.85 m²
Spinnaker: 76.72 m²
Asymmetric spinnaker: 0 m²

Design

Type: Dufour 34
Builder: Dufour
Designer: Felci
Year built: 2003
Stability index: 113.7

Performance data

Polar CSV

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

6,43.6,4.681209,52,5.18,60,5.46,75,5.65,90,5.53,110,5.41,120,5.24,135,4.72,144.8,4.222017,150,3.99
8,41.4,5.465857,52,6.09,60,6.34,75,6.51,90,6.46,110,6.51,120,6.37,135,5.85,149.6,5.112962,150,5.09
10,40,5.991819,52,6.65,60,6.84,75,6.98,90,7,110,7.13,120,7.05,135,6.69,150,6.03,152.8,5.880261
12,39.3,6.267444,52,6.93,60,7.11,75,7.27,90,7.31,110,7.52,120,7.47,135,7.2,150,6.75,158.3,6.39306
14,38.8,6.364376,52,7.05,60,7.25,75,7.48,90,7.56,110,7.84,120,7.84,135,7.59,150,7.22,170,6.651044
16,38.4,6.405566,52,7.12,60,7.32,75,7.62,90,7.79,110,8.11,120,8.18,135,7.97,150,7.58,177.2,7.058427
20,38.8,6.454196,52,7.17,60,7.39,75,7.78,90,8.13,110,8.45,120,8.8,135,8.75,150,8.29,179,7.741179

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.18	5.46	5.65	5.53	5.41	5.24	4.72	3.99
8	6.09	6.34	6.51	6.46	6.51	6.37	5.85	5.09
10	6.65	6.84	6.98	7	7.13	7.05	6.69	6.03
12	6.93	7.11	7.27	7.31	7.52	7.47	7.2	6.75
14	7.05	7.25	7.48	7.56	7.84	7.84	7.59	7.22
16	7.12	7.32	7.62	7.79	8.11	8.18	7.97	7.58
20	7.17	7.39	7.78	8.13	8.45	8.8	8.75	8.29

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.6°	3.39	144.8°	3.45
8	41.4°	4.1	149.6°	4.41
10	40°	4.59	152.8°	5.23
12	39.3°	4.85	158.3°	5.94
14	38.8°	4.96	170°	6.55
16	38.4°	5.02	177.2°	7.05
20	38.8°	5.03	179°	7.74

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°	5.18	6.09	6.65	6.93	7.05	7.12	7.17
60°	5.46	6.34	6.84	7.11	7.25	7.32	7.39
75°	5.65	6.51	6.98	7.27	7.48	7.62	7.78
90°	5.53	6.46	7.00	7.31	7.56	7.79	8.13
110°	5.41	6.51	7.13	7.52	7.84	8.11	8.45
120°	5.24	6.37	7.05	7.47	7.84	8.18	8.80
135°	4.72	5.85	6.69	7.20	7.59	7.97	8.75
150°	3.99	5.09	6.03	6.75	7.22	7.58	8.29