Bolleboos — ORC Rating

GPH

765.2

OSN

739.4

LOA

8.47 m

Displacement

3185 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5245

Medium

0.7215

High

0.8553

Triple Offshore

Low

0.6738

Medium

0.8893

High

1.0114

Boat Specifications

Dimensions

Length overall: 8.47 m
Beam: 2.79 m
Draft: 1.58 m
Displacement: 3185 kg
Crew weight: 439 kg
Wetted surface: 16.94 m²

Sails

Mainsail: 14.08 m²
Genoa: 21.52 m²
Spinnaker: 48.3 m²
Asymmetric spinnaker: 0 m²

Design

Type: Spirit 28
Builder: van Heygen
Designer: E G vd Stadt
Year built: 1971
Stability index: 116.5

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.

6,44.2,3.696416,52,4.09,60,4.32,75,4.48,90,4.52,110,4.63,120,4.51,135,4.12,147.9,3.63584,150,3.55
8,42.7,4.367854,52,4.86,60,5.12,75,5.3,90,5.49,110,5.62,120,5.49,135,5.03,150,4.48,152,4.394372
10,42.3,4.894332,52,5.47,60,5.71,75,5.88,90,6.07,110,6.17,120,6.1,135,5.82,150,5.27,153.8,5.104438
12,41.8,5.338871,52,5.84,60,6.01,75,6.15,90,6.35,110,6.47,120,6.42,135,6.23,150,5.91,159.2,5.594626
14,39.9,5.539876,52,6.05,60,6.19,75,6.33,90,6.52,110,6.75,120,6.7,135,6.52,150,6.26,173.6,5.806185
16,39,5.648874,52,6.18,60,6.33,75,6.49,90,6.62,110,7.03,120,7.01,135,6.81,150,6.52,179,6.150937
20,39.4,5.719953,52,6.25,60,6.44,75,6.75,90,6.9,110,7.36,120,7.56,135,7.45,150,7.09,179,6.661015

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.09	4.32	4.48	4.52	4.63	4.51	4.12	3.55
8	4.86	5.12	5.3	5.49	5.62	5.49	5.03	4.48
10	5.47	5.71	5.88	6.07	6.17	6.1	5.82	5.27
12	5.84	6.01	6.15	6.35	6.47	6.42	6.23	5.91
14	6.05	6.19	6.33	6.52	6.75	6.7	6.52	6.26
16	6.18	6.33	6.49	6.62	7.03	7.01	6.81	6.52
20	6.25	6.44	6.75	6.9	7.36	7.56	7.45	7.09

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.2°	2.65	147.9°	3.08
8	42.7°	3.21	152°	3.88
10	42.3°	3.62	153.8°	4.58
12	41.8°	3.98	159.2°	5.23
14	39.9°	4.25	173.6°	5.77
16	39°	4.39	179°	6.15
20	39.4°	4.42	179°	6.66

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