DUŻY PTAK — ORC Rating

GPH

602.3

OSN

587.9

LOA

9.46 m

Displacement

2339 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7888

Medium

1.0217

High

1.152

Triple Offshore

Low

1.0077

Medium

1.2486

High

1.3955

Boat Specifications

Dimensions

Length overall: 9.46 m
Beam: 2.92 m
Draft: 2.28 m
Displacement: 2339 kg
Crew weight: 500 kg
Wetted surface: 18.15 m²

Sails

Mainsail: 33.23 m²
Genoa: 20.4 m²
Spinnaker: 86.17 m²
Asymmetric spinnaker: 0 m²

Design

Type: MANTRA 31
Builder: A.ARMINSKI
Designer: A.ARMINSKI
Year built: 2002

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.

6,41.7,4.928759,52,5.54,60,5.83,75,6.06,90,6.05,110,6.16,120,6,135,5.42,142.8,4.984119,150,4.59
8,40.8,5.878506,52,6.53,60,6.72,75,6.85,90,6.84,110,7.05,120,7.01,135,6.64,146.1,5.951719,150,5.71
10,38.6,6.193056,52,6.86,60,7.04,75,7.23,90,7.26,110,7.48,120,7.58,135,7.26,150,6.66,153,6.509492
12,38.2,6.298857,52,6.97,60,7.19,75,7.53,90,7.69,110,7.83,120,8.12,135,7.91,150,7.26,160.7,6.823473
14,38.3,6.345757,52,7.02,60,7.26,75,7.73,90,8.1,110,8.19,120,8.54,135,8.71,150,7.85,180,7.01
16,37.8,6.403807,52,7.08,60,7.29,75,7.84,90,8.43,110,8.57,120,8.95,135,9.61,150,8.55,180,7.5
20,38.9,6.488975,52,7.15,60,7.46,75,8.03,90,8.73,110,9.46,120,9.83,135,10.94,145.9,10.989537,150,10.51

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.54	5.83	6.06	6.05	6.16	6	5.42	4.59
8	6.53	6.72	6.85	6.84	7.05	7.01	6.64	5.71
10	6.86	7.04	7.23	7.26	7.48	7.58	7.26	6.66
12	6.97	7.19	7.53	7.69	7.83	8.12	7.91	7.26
14	7.02	7.26	7.73	8.1	8.19	8.54	8.71	7.85
16	7.08	7.29	7.84	8.43	8.57	8.95	9.61	8.55
20	7.15	7.46	8.03	8.73	9.46	9.83	10.94	10.51

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.7°	3.68	142.8°	3.97
8	40.8°	4.45	146.1°	4.94
10	38.6°	4.84	153°	5.8
12	38.2°	4.95	160.7°	6.44
14	38.3°	4.98	180°	7.01
16	37.8°	5.06	180°	7.5
20	38.9°	5.05	145.9°	9.1

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