WIRBELZOPF 3/4 — ORC Rating

GPH

662.5

OSN

645.1

LOA

8.032 m

Displacement

1437 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.64

Medium

0.8258

High

0.9328

Triple Offshore

Low

0.8139

Medium

1.01

High

1.1281

Boat Specifications

Dimensions

Length overall: 8.032 m
Beam: 2.49 m
Draft: 1.5 m
Displacement: 1437 kg
Crew weight: 350 kg
Wetted surface: 13.22 m²

Sails

Mainsail: 21.53 m²
Genoa: 13.98 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 64.99 m²

Design

Type: J-80 OD
Builder: J-COMPOSITES
Designer: JOHNSTONE
Year built: 1995
Stability index: 106.8

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.

6,42.6,4.496689,52,5.01,60,5.25,75,5.39,90,5.48,110,5.61,120,5.49,135,4.97,144.8,4.491248,150,4.24
8,40.5,5.260348,52,5.83,60,6.01,75,6.12,90,6.23,110,6.44,120,6.4,135,6.04,148.7,5.383524,150,5.32
10,38.2,5.611709,52,6.22,60,6.37,75,6.51,90,6.52,110,6.9,120,6.96,135,6.71,149.6,6.133236,150,6.11
12,37.8,5.745708,52,6.36,60,6.55,75,6.78,90,6.88,110,7.21,120,7.44,135,7.31,149.6,6.689749,150,6.66
14,37.8,5.821642,52,6.44,60,6.64,75,6.96,90,7.18,110,7.5,120,7.88,135,7.96,147.3,7.320168,150,7.11
16,37.8,5.846954,52,6.48,60,6.7,75,7.08,90,7.43,110,7.78,120,8.28,135,8.77,144.3,8.176499,150,7.67
20,39,5.880491,52,6.49,60,6.75,75,7.21,90,7.76,110,8.33,120,9.17,135,11.05,142.2,11.149711,150,10.18

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.01	5.25	5.39	5.48	5.61	5.49	4.97	4.24
8	5.83	6.01	6.12	6.23	6.44	6.4	6.04	5.32
10	6.22	6.37	6.51	6.52	6.9	6.96	6.71	6.11
12	6.36	6.55	6.78	6.88	7.21	7.44	7.31	6.66
14	6.44	6.64	6.96	7.18	7.5	7.88	7.96	7.11
16	6.48	6.7	7.08	7.43	7.78	8.28	8.77	7.67
20	6.49	6.75	7.21	7.76	8.33	9.17	11.05	10.18

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.31	144.8°	3.67
8	40.5°	4	148.7°	4.6
10	38.2°	4.41	149.6°	5.29
12	37.8°	4.54	149.6°	5.77
14	37.8°	4.6	147.3°	6.16
16	37.8°	4.62	144.3°	6.64
20	39°	4.57	142.2°	8.81

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