Nuthr Witch — ORC Rating

GPH

657.6

OSN

635.3

LOA

10.53 m

Displacement

4230 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6062

Medium

0.8447

High

0.9834

Triple Offshore

Low

0.7843

Medium

1.0365

High

1.1692

Boat Specifications

Dimensions

Length overall: 10.53 m
Beam: 3.33 m
Draft: 1.93 m
Displacement: 4230 kg
Crew weight: 650 kg
Wetted surface: 23.96 m²

Sails

Mainsail: 31.94 m²
Genoa: 30.47 m²
Spinnaker: 64.49 m²
Asymmetric spinnaker: 0 m²

Design

Type: Lavranos 34
Builder: John Robertson Yac
Designer: Angelo Lavranos
Year built: 1986
Stability index: 117.4

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.

6,43.6,4.54312,52,5.03,60,5.31,75,5.47,90,5.35,110,5.25,120,5.06,135,4.5,145.1,3.962681,150,3.75
8,41.4,5.359206,52,5.98,60,6.22,75,6.38,90,6.31,110,6.36,120,6.17,135,5.6,150,4.84,150.2,4.828494
10,39.9,5.943961,52,6.57,60,6.75,75,6.88,90,6.94,110,7.01,120,6.89,135,6.48,150,5.79,152.3,5.669795
12,38.2,6.235232,52,6.89,60,7.05,75,7.19,90,7.29,110,7.42,120,7.33,135,7.02,150,6.55,158.6,6.197265
14,37.6,6.348688,52,7.04,60,7.22,75,7.43,90,7.51,110,7.79,120,7.72,135,7.42,150,7.05,171.8,6.466108
16,37.2,6.402773,52,7.12,60,7.31,75,7.61,90,7.72,110,8.12,120,8.1,135,7.82,150,7.42,177.2,6.908247
20,38.1,6.518963,52,7.18,60,7.4,75,7.79,90,8.11,110,8.61,120,8.89,135,8.66,150,8.16,179,7.611159

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.03	5.31	5.47	5.35	5.25	5.06	4.5	3.75
8	5.98	6.22	6.38	6.31	6.36	6.17	5.6	4.84
10	6.57	6.75	6.88	6.94	7.01	6.89	6.48	5.79
12	6.89	7.05	7.19	7.29	7.42	7.33	7.02	6.55
14	7.04	7.22	7.43	7.51	7.79	7.72	7.42	7.05
16	7.12	7.31	7.61	7.72	8.12	8.1	7.82	7.42
20	7.18	7.4	7.79	8.11	8.61	8.89	8.66	8.16

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.6°	3.29	145.1°	3.25
8	41.4°	4.02	150.2°	4.19
10	39.9°	4.56	152.3°	5.02
12	38.2°	4.9	158.6°	5.77
14	37.6°	5.03	171.8°	6.4
16	37.2°	5.1	177.2°	6.9
20	38.1°	5.13	179°	7.61

Loading polar chart…