BLUEBIRD — ORC Rating

GPH

735.5

OSN

712.8

LOA

9.4 m

Displacement

4020 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5512

Medium

0.751

High

0.8671

Triple Offshore

Low

0.7097

Medium

0.9233

High

1.0296

Boat Specifications

Dimensions

Length overall: 9.4 m
Beam: 3.14 m
Draft: 1.66 m
Displacement: 4020 kg
Crew weight: 450 kg
Wetted surface: 19.59 m²

Sails

Mainsail: 21.95 m²
Genoa: 22.37 m²
Spinnaker: 52.38 m²
Asymmetric spinnaker: 49.43 m²

Design

Type: BIRDIE 32
Designer: Jan Becker
Year built: 1978
Stability index: 110.7

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.

6,44.2,3.961442,52,4.36,60,4.6,75,4.74,90,4.85,110,4.87,120,4.71,135,4.27,146,3.811649,150,3.65
8,42.3,4.650967,52,5.18,60,5.42,75,5.58,90,5.79,110,5.83,120,5.69,135,5.26,147.1,4.752151,150,4.61
10,41.1,5.14887,52,5.72,60,5.92,75,6.07,90,6.3,110,6.36,120,6.28,135,5.99,150,5.41,155,5.207944
12,40,5.443548,52,6.02,60,6.19,75,6.35,90,6.58,110,6.68,120,6.63,135,6.43,150,6.03,162.2,5.629487
14,39.6,5.619631,52,6.19,60,6.36,75,6.53,90,6.75,110,6.94,120,6.92,135,6.73,150,6.42,175.4,5.929098
16,39.7,5.705748,52,6.28,60,6.46,75,6.67,90,6.85,110,7.17,120,7.18,135,7.01,150,6.71,179,6.320963
20,40,5.7699,52,6.34,60,6.54,75,6.83,90,7.03,110,7.55,120,7.71,135,7.56,150,7.22,179,6.861045

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.36	4.6	4.74	4.85	4.87	4.71	4.27	3.65
8	5.18	5.42	5.58	5.79	5.83	5.69	5.26	4.61
10	5.72	5.92	6.07	6.3	6.36	6.28	5.99	5.41
12	6.02	6.19	6.35	6.58	6.68	6.63	6.43	6.03
14	6.19	6.36	6.53	6.75	6.94	6.92	6.73	6.42
16	6.28	6.46	6.67	6.85	7.17	7.18	7.01	6.71
20	6.34	6.54	6.83	7.03	7.55	7.71	7.56	7.22

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.2°	2.84	146°	3.16
8	42.3°	3.44	147.1°	3.99
10	41.1°	3.88	155°	4.72
12	40°	4.17	162.2°	5.36
14	39.6°	4.33	175.4°	5.91
16	39.7°	4.39	179°	6.32
20	40°	4.42	179°	6.86

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