BLUEBIRD — ORC Rating

GPH

729.4

OSN

708.5

LOA

9.4 m

Displacement

4020 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5528

Medium

0.7521

High

0.8738

Triple Offshore

Low

0.7143

Medium

0.9302

High

1.0446

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: 19.68 m²

Sails

Mainsail: 23.84 m²
Genoa: 22.37 m²
Spinnaker: 52.38 m²
Asymmetric spinnaker: 49.43 m²

Design

Type: BIRDIE 32
Designer: Jan Becker
Year built: 1978

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.

6,43.5,3.942792,52,4.38,60,4.64,75,4.82,90,4.94,110,4.94,120,4.76,135,4.31,148,3.761579,150,3.69
8,42,4.588608,52,5.16,60,5.46,75,5.69,90,5.92,110,5.93,120,5.76,135,5.24,150,4.62,153,4.500528
10,42,5.16723,52,5.77,60,6.01,75,6.18,90,6.42,110,6.44,120,6.36,135,6.03,150,5.44,155,5.207944
12,41.4,5.559177,52,6.12,60,6.29,75,6.44,90,6.7,110,6.76,120,6.68,135,6.46,150,6.1,162,5.688411
14,40.7,5.75096,52,6.29,60,6.46,75,6.63,90,6.9,110,7.06,120,6.99,135,6.76,150,6.48,180,6.01
16,40.5,5.812685,52,6.37,60,6.56,75,6.78,90,7.01,110,7.35,120,7.3,135,7.07,150,6.76,180,6.41
20,41.2,5.847837,52,6.4,60,6.62,75,6.98,90,7.22,110,7.74,120,7.86,135,7.68,150,7.34,180,6.96

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.38	4.64	4.82	4.94	4.94	4.76	4.31	3.69
8	5.16	5.46	5.69	5.92	5.93	5.76	5.24	4.62
10	5.77	6.01	6.18	6.42	6.44	6.36	6.03	5.44
12	6.12	6.29	6.44	6.7	6.76	6.68	6.46	6.1
14	6.29	6.46	6.63	6.9	7.06	6.99	6.76	6.48
16	6.37	6.56	6.78	7.01	7.35	7.3	7.07	6.76
20	6.4	6.62	6.98	7.22	7.74	7.86	7.68	7.34

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	2.86	148°	3.19
8	42°	3.41	153°	4.01
10	42°	3.84	155°	4.72
12	41.4°	4.17	162°	5.41
14	40.7°	4.36	180°	6.01
16	40.5°	4.42	180°	6.41
20	41.2°	4.4	180°	6.96

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