BETELGEUSE — ORC Rating

GPH

744.2

OSN

725.8

LOA

9.09 m

Displacement

3800 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.547

Medium

0.7334

High

0.8324

Triple Offshore

Low

0.7053

Medium

0.9107

High

1.0049

Boat Specifications

Dimensions

Length overall: 9.09 m
Beam: 2.69 m
Draft: 1.7 m
Displacement: 3800 kg
Crew weight: 450 kg
Wetted surface: 19.14 m²

Sails

Mainsail: 17.99 m²
Genoa: 32.32 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 65.25 m²

Design

Type: Alpa 9
Builder: Alpa
Designer: Illingworth & co.
Year built: 1968
Stability index: 134.1

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.

6,43.2,3.923351,52,4.37,60,4.62,75,4.81,90,4.75,110,4.83,120,4.61,135,4.19,146,3.775462,150,3.62
8,41.8,4.587673,52,5.16,60,5.45,75,5.66,90,5.69,110,5.83,120,5.71,135,5.2,146,4.692188,150,4.49
10,41.8,5.191314,52,5.74,60,5.93,75,6.08,90,6.2,110,6.3,120,6.25,135,6.02,145.6,5.635588,150,5.37
12,40.8,5.468992,52,6,60,6.16,75,6.3,90,6.41,110,6.61,120,6.58,135,6.39,148.2,6.000758,150,5.89
14,40.2,5.564313,52,6.1,60,6.27,75,6.46,90,6.55,110,6.88,120,6.89,135,6.7,150,6.19,165.8,5.601141
16,40,5.626305,52,6.16,60,6.33,75,6.58,90,6.73,110,7.08,120,7.19,135,7.01,150,6.42,173.6,5.937
20,40.4,5.672728,52,6.2,60,6.39,75,6.7,90,7.01,110,7.33,120,7.6,135,7.57,150,6.86,177.2,6.447698

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.37	4.62	4.81	4.75	4.83	4.61	4.19	3.62
8	5.16	5.45	5.66	5.69	5.83	5.71	5.2	4.49
10	5.74	5.93	6.08	6.2	6.3	6.25	6.02	5.37
12	6	6.16	6.3	6.41	6.61	6.58	6.39	5.89
14	6.1	6.27	6.46	6.55	6.88	6.89	6.7	6.19
16	6.16	6.33	6.58	6.73	7.08	7.19	7.01	6.42
20	6.2	6.39	6.7	7.01	7.33	7.6	7.57	6.86

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.2°	2.86	146°	3.13
8	41.8°	3.42	146°	3.89
10	41.8°	3.87	145.6°	4.65
12	40.8°	4.14	148.2°	5.1
14	40.2°	4.25	165.8°	5.43
16	40°	4.31	173.6°	5.9
20	40.4°	4.32	177.2°	6.44

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