DONNA — ORC Rating | RegattaPages

GPH

681.8

OSN

666.7

LOA

9.447 m

Displacement

4473 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6129

Medium

0.8064

High

0.9096

Triple Offshore

Low

0.787

Medium

0.9848

High

1.0816

Boat Specifications

Dimensions

Length overall: 9.447 m
Beam: 3.02 m
Draft: 1.64 m
Displacement: 4473 kg
Crew weight: 450 kg
Wetted surface: 20.68 m²

Sails

Mainsail: 32.93 m²
Genoa: 30.49 m²
Spinnaker: 62.01 m²
Asymmetric spinnaker: 0 m²

Design

Type: INFERNO 31
Builder: FINNGULF MARIN
Designer: H.SÖDERGREN
Year built: 1985

Velocity Prediction

Polar CSV

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

6,42,4.440588,52,4.99,60,5.26,75,5.48,90,5.43,110,5.27,120,5.1,135,4.63,147,4.077882,150,3.94
8,41.2,5.17002,52,5.82,60,6.06,75,6.22,90,6.23,110,6.24,120,6.11,135,5.6,150,4.92,152.5,4.802647
10,41.6,5.72347,52,6.26,60,6.42,75,6.55,90,6.6,110,6.67,120,6.6,135,6.33,150,5.75,154,5.574136
12,40.5,5.865288,52,6.43,60,6.59,75,6.75,90,6.81,110,6.98,120,6.92,135,6.71,150,6.38,166,5.874498
14,40.1,5.948324,52,6.5,60,6.68,75,6.91,90,7.02,110,7.29,120,7.25,135,7.01,150,6.72,180,6.29
16,40.1,5.987543,52,6.54,60,6.72,75,7.01,90,7.22,110,7.54,120,7.59,135,7.36,150,7.01,180,6.65
20,40.1,6.000617,52,6.55,60,6.75,75,7.11,90,7.51,110,7.82,120,8.1,135,8.05,150,7.67,180,7.24

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.99	5.26	5.48	5.43	5.27	5.1	4.63	3.94
8	5.82	6.06	6.22	6.23	6.24	6.11	5.6	4.92
10	6.26	6.42	6.55	6.6	6.67	6.6	6.33	5.75
12	6.43	6.59	6.75	6.81	6.98	6.92	6.71	6.38
14	6.5	6.68	6.91	7.02	7.29	7.25	7.01	6.72
16	6.54	6.72	7.01	7.22	7.54	7.59	7.36	7.01
20	6.55	6.75	7.11	7.51	7.82	8.1	8.05	7.67

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.3	147°	3.42
8	41.2°	3.89	152.5°	4.26
10	41.6°	4.28	154°	5.01
12	40.5°	4.46	166°	5.7
14	40.1°	4.55	180°	6.29
16	40.1°	4.58	180°	6.65
20	40.1°	4.59	180°	7.24

Loading polar chart…