NN — ORC Rating | RegattaPages

GPH

755.6

OSN

730.5

LOA

8.9 m

Displacement

1708 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5219

Medium

0.731

High

0.8529

Triple Offshore

Low

0.6767

Medium

0.9043

High

1.0267

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.

6,42.9,3.767697,52,4.21,60,4.45,75,4.62,90,4.7,110,4.65,120,4.43,135,3.89,148.4,3.393106,150,3.34
8,42,4.50787,52,5.06,60,5.33,75,5.49,90,5.68,110,5.66,120,5.47,135,4.86,150,4.25,153.2,4.134056
10,41.8,5.164486,52,5.68,60,5.86,75,5.99,90,6.21,110,6.19,120,6.08,135,5.76,150,5.11,152,5.017285
12,40.6,5.465767,52,6.01,60,6.16,75,6.29,90,6.55,110,6.59,120,6.47,135,6.21,150,5.85,159.5,5.51954
14,40,5.574089,52,6.16,60,6.37,75,6.56,90,6.71,110,6.99,120,6.87,135,6.57,150,6.26,175.7,5.786288
16,39.6,5.619631,52,6.23,60,6.46,75,6.8,90,6.9,110,7.36,120,7.25,135,6.96,150,6.6,179,6.180941
20,40,5.639359,52,6.27,60,6.53,75,6.97,90,7.39,110,7.73,120,8.15,135,7.75,150,7.32,178.4,6.852672

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.21	4.45	4.62	4.7	4.65	4.43	3.89	3.34
8	5.06	5.33	5.49	5.68	5.66	5.47	4.86	4.25
10	5.68	5.86	5.99	6.21	6.19	6.08	5.76	5.11
12	6.01	6.16	6.29	6.55	6.59	6.47	6.21	5.85
14	6.16	6.37	6.56	6.71	6.99	6.87	6.57	6.26
16	6.23	6.46	6.8	6.9	7.36	7.25	6.96	6.6
20	6.27	6.53	6.97	7.39	7.73	8.15	7.75	7.32

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.9°	2.76	148.4°	2.89
8	42°	3.35	153.2°	3.69
10	41.8°	3.85	152°	4.43
12	40.6°	4.15	159.5°	5.17
14	40°	4.27	175.7°	5.77
16	39.6°	4.33	179°	6.18
20	40°	4.32	178.4°	6.85

Loading polar chart…