NN — ORC Rating | RegattaPages

GPH

768

OSN

743.6

LOA

8.9 m

Displacement

1708 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5286

Medium

0.7209

High

0.8332

Triple Offshore

Low

0.6787

Medium

0.8837

High

0.9915

Boat Specifications

Dimensions

Length overall: 8.9 m
Beam: 1.94 m
Draft: 1.19 m
Displacement: 1708 kg
Crew weight: 285 kg
Wetted surface: 13.42 m²

Sails

Mainsail: 18.58 m²
Genoa: 10.78 m²
Spinnaker: 29.31 m²
Asymmetric spinnaker: 0 m²

Design

Type: Drake
Builder: Petticrow
Designer: Johan Anker
Year built: 1929
Stability index: 120.6

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.

6,42,3.835053,52,4.31,60,4.51,75,4.62,90,4.66,110,4.61,120,4.41,135,3.87,148.4,3.369625,150,3.32
8,40.6,4.53066,52,5.05,60,5.24,75,5.36,90,5.5,110,5.48,120,5.32,135,4.8,150,4.24,153.2,4.122853
10,39.4,4.969371,52,5.54,60,5.7,75,5.82,90,6.02,110,6.02,120,5.9,135,5.58,150,5.03,155.9,4.798243
12,39,5.211376,52,5.8,60,5.96,75,6.13,90,6.28,110,6.4,120,6.3,135,6.05,150,5.68,168.5,5.173867
14,38.8,5.325033,52,5.91,60,6.08,75,6.31,90,6.41,110,6.7,120,6.65,135,6.4,150,6.1,176.6,5.649945
16,38.7,5.394459,52,5.98,60,6.16,75,6.42,90,6.59,110,6.96,120,6.98,135,6.73,150,6.42,179,6.04092
20,38.8,5.466178,52,6.06,60,6.25,75,6.57,90,6.89,110,7.39,120,7.79,135,7.44,150,7.05,179,6.651013

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.31	4.51	4.62	4.66	4.61	4.41	3.87	3.32
8	5.05	5.24	5.36	5.5	5.48	5.32	4.8	4.24
10	5.54	5.7	5.82	6.02	6.02	5.9	5.58	5.03
12	5.8	5.96	6.13	6.28	6.4	6.3	6.05	5.68
14	5.91	6.08	6.31	6.41	6.7	6.65	6.4	6.1
16	5.98	6.16	6.42	6.59	6.96	6.98	6.73	6.42
20	6.06	6.25	6.57	6.89	7.39	7.79	7.44	7.05

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	2.85	148.4°	2.87
8	40.6°	3.44	153.2°	3.68
10	39.4°	3.84	155.9°	4.38
12	39°	4.05	168.5°	5.07
14	38.8°	4.15	176.6°	5.64
16	38.7°	4.21	179°	6.04
20	38.8°	4.26	179°	6.65

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