IJsvogel — ORC Rating

GPH

843.1

OSN

814.6

LOA

7.68 m

Displacement

1998 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.4745

Medium

0.6567

High

0.7641

Triple Offshore

Low

0.6127

Medium

0.8079

High

0.9109

Boat Specifications

Dimensions

Length overall: 7.68 m
Beam: 2.21 m
Draft: 1.17 m
Displacement: 1998 kg
Crew weight: 240 kg
Wetted surface: 14.83 m²

Sails

Mainsail: 18.39 m²
Genoa: 7.31 m²
Spinnaker: 24.05 m²
Asymmetric spinnaker: 0 m²

Design

Type: NORDIC FOLKBOAT
Builder: Folkebadscentralen
Designer: Sunden Tord
Year built: 1941

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.

6,44,3.378098,52,3.73,60,3.92,75,4.12,90,4.34,110,4.28,120,4.1,135,3.6,150,3.13,150.2,3.122964
8,42.2,3.995656,52,4.43,60,4.63,75,4.9,90,5.14,110,5.11,120,4.95,135,4.48,150,4,156.3,3.811448
10,41,4.412293,52,4.92,60,5.12,75,5.38,90,5.61,110,5.6,120,5.49,135,5.2,150,4.74,164,4.338049
12,40.5,4.721162,52,5.25,60,5.42,75,5.63,90,5.88,110,5.91,120,5.83,135,5.63,150,5.33,173.9,4.857503
14,40.5,4.918425,52,5.43,60,5.61,75,5.78,90,6.07,110,6.18,120,6.11,135,5.92,150,5.69,178.4,5.322075
16,40.5,5.010481,52,5.54,60,5.72,75,5.93,90,6.18,110,6.42,120,6.38,135,6.19,150,5.96,179.4,5.670311
20,41,5.1013,52,5.62,60,5.82,75,6.11,90,6.33,110,6.83,120,6.88,135,6.74,150,6.48,179.4,6.180339
24,42.1,5.107983,52,5.61,60,5.84,75,6.19,90,6.5,110,7.07,120,7.4,135,7.35,150,7.02,179.4,6.670366

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	3.73	3.92	4.12	4.34	4.28	4.1	3.6	3.13
8	4.43	4.63	4.9	5.14	5.11	4.95	4.48	4
10	4.92	5.12	5.38	5.61	5.6	5.49	5.2	4.74
12	5.25	5.42	5.63	5.88	5.91	5.83	5.63	5.33
14	5.43	5.61	5.78	6.07	6.18	6.11	5.92	5.69
16	5.54	5.72	5.93	6.18	6.42	6.38	6.19	5.96
20	5.62	5.82	6.11	6.33	6.83	6.88	6.74	6.48
24	5.61	5.84	6.19	6.5	7.07	7.4	7.35	7.02

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44°	2.43	150.2°	2.71
8	42.2°	2.96	156.3°	3.49
10	41°	3.33	164°	4.17
12	40.5°	3.59	173.9°	4.83
14	40.5°	3.74	178.4°	5.32
16	40.5°	3.81	179.4°	5.67
20	41°	3.85	179.4°	6.18
24	42.1°	3.79	179.4°	6.67

Loading polar chart…