Belaya Noch — ORC Rating

GPH

702.8

OSN

682.4

LOA

8.902 m

Displacement

2926 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5782

Medium

0.7884

High

0.9084

Triple Offshore

Low

0.745

Medium

0.9634

High

1.08

Boat Specifications

Dimensions

Length overall: 8.902 m
Beam: 3.11 m
Draft: 1.76 m
Displacement: 2926 kg
Crew weight: 422 kg
Wetted surface: 17.76 m²

Sails

Mainsail: 23.28 m²
Genoa: 22.82 m²
Spinnaker: 53.16 m²
Asymmetric spinnaker: 0 m²

Design

Type: LES-31
Builder: Len.Exp.Yard №20
Designer: Len.Experim.Yard
Year built: 1984

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.

6,42,4.117636,52,4.65,60,4.91,75,5.11,90,5.05,110,5.06,120,4.9,135,4.44,148,3.844122,150,3.76
8,41.2,4.837756,52,5.49,60,5.75,75,5.94,90,5.98,110,6.06,120,5.93,135,5.41,150,4.72,152,4.632212
10,41.2,5.475702,52,6.02,60,6.19,75,6.32,90,6.45,110,6.53,120,6.46,135,6.19,150,5.59,152,5.50429
12,39.2,5.742347,52,6.29,60,6.43,75,6.57,90,6.75,110,6.89,120,6.82,135,6.58,150,6.24,164,5.773662
14,38.6,5.885962,52,6.44,60,6.6,75,6.79,90,6.94,110,7.25,120,7.19,135,6.93,150,6.59,180,6.13
16,38.2,5.917108,52,6.51,60,6.71,75,6.99,90,7.12,110,7.55,120,7.55,135,7.3,150,6.92,180,6.5
20,39,5.957697,52,6.54,60,6.78,75,7.2,90,7.52,110,7.89,120,8.16,135,8.01,150,7.59,180,7.14

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.65	4.91	5.11	5.05	5.06	4.9	4.44	3.76
8	5.49	5.75	5.94	5.98	6.06	5.93	5.41	4.72
10	6.02	6.19	6.32	6.45	6.53	6.46	6.19	5.59
12	6.29	6.43	6.57	6.75	6.89	6.82	6.58	6.24
14	6.44	6.6	6.79	6.94	7.25	7.19	6.93	6.59
16	6.51	6.71	6.99	7.12	7.55	7.55	7.3	6.92
20	6.54	6.78	7.2	7.52	7.89	8.16	8.01	7.59

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.06	148°	3.26
8	41.2°	3.64	152°	4.09
10	41.2°	4.12	152°	4.86
12	39.2°	4.45	164°	5.55
14	38.6°	4.6	180°	6.13
16	38.2°	4.65	180°	6.5
20	39°	4.63	180°	7.14

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