HEY DORY — ORC Rating

GPH

668.9

OSN

653.2

LOA

8 m

Displacement

1521 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6238

Medium

0.8142

High

0.9143

Triple Offshore

Low

0.8017

Medium

1.0025

High

1.1205

Boat Specifications

Dimensions

Length overall: 8 m
Beam: 2.49 m
Draft: 1.51 m
Displacement: 1521 kg
Crew weight: 300 kg
Wetted surface: 13.71 m²

Sails

Mainsail: 21.27 m²
Genoa: 13.31 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 63.56 m²

Design

Type: J 80
Builder: J COMPOSITE
Designer: JOHNSTONE
Year built: 1993

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.

6,42.8,4.320391,52,4.86,60,5.14,75,5.37,90,5.54,110,5.66,120,5.53,135,4.96,145,4.455827,150,4.21
8,41.6,5.121703,52,5.74,60,5.96,75,6.12,90,6.31,110,6.45,120,6.39,135,6.05,148,5.388845,150,5.27
10,39.9,5.618086,52,6.18,60,6.33,75,6.47,90,6.56,110,6.95,120,6.94,135,6.64,150,6.085272
12,39.2,5.781059,52,6.35,60,6.54,75,6.77,90,6.85,110,7.33,120,7.54,135,7.21,150,6.56,151,6.505685
14,39,5.829021,52,6.42,60,6.64,75,7.03,90,7.23,110,7.63,120,8.03,135,7.88,150,6.95,176,6.165018
16,39.2,5.832676,52,6.44,60,6.7,75,7.2,90,7.58,110,7.95,120,8.44,135,8.69,150,7.47,177.5,6.546231
20,40.1,5.93525,52,6.52,60,6.8,75,7.31,90,8.03,110,8.61,120,9.28,135,10.69,140.2,10.634095,150,9.43

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.86	5.14	5.37	5.54	5.66	5.53	4.96	4.21
8	5.74	5.96	6.12	6.31	6.45	6.39	6.05	5.27
10	6.18	6.33	6.47	6.56	6.95	6.94	6.64	6.09
12	6.35	6.54	6.77	6.85	7.33	7.54	7.21	6.56
14	6.42	6.64	7.03	7.23	7.63	8.03	7.88	6.95
16	6.44	6.7	7.2	7.58	7.95	8.44	8.69	7.47
20	6.52	6.8	7.31	8.03	8.61	9.28	10.69	9.43

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.17	145°	3.65
8	41.6°	3.83	148°	4.57
10	39.9°	4.31	150°	5.27
12	39.2°	4.48	151°	5.69
14	39°	4.53	176°	6.15
16	39.2°	4.52	177.5°	6.54
20	40.1°	4.54	140.2°	8.17

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