Butterfly — ORC Rating

GPH

711.6

OSN

690.7

LOA

8.7 m

Displacement

3168 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.581

Medium

0.7792

High

0.8877

Triple Offshore

Low

0.7441

Medium

0.9497

High

1.0479

Boat Specifications

Dimensions

Length overall: 8.7 m
Beam: 2.63 m
Draft: 1.57 m
Displacement: 3168 kg
Crew weight: 437 kg
Wetted surface: 17.95 m²

Sails

Mainsail: 21.61 m²
Genoa: 26.31 m²
Spinnaker: 54.64 m²
Asymmetric spinnaker: 0 m²

Design

Type: MAMBA 29
Designer: JanBecker
Year built: 1981

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.

6,42.9,4.286438,52,4.76,60,4.99,75,5.11,90,4.99,110,4.97,120,4.8,135,4.3,145.8,3.820668,150,3.64
8,40.6,4.978458,52,5.56,60,5.75,75,5.88,90,5.85,110,5.94,120,5.79,135,5.3,150,4.65,150.5,4.630291
10,39.2,5.393935,52,6,60,6.16,75,6.28,90,6.32,110,6.44,120,6.37,135,6.05,150,5.49,153.8,5.32734
12,39,5.610272,52,6.2,60,6.36,75,6.52,90,6.54,110,6.76,120,6.72,135,6.49,150,6.12,161.4,5.729248
14,38.5,5.698893,52,6.29,60,6.45,75,6.67,90,6.75,110,7.02,120,7.02,135,6.82,150,6.51,175,6.012881
16,38.4,5.754801,52,6.33,60,6.5,75,6.75,90,6.92,110,7.19,120,7.31,135,7.15,150,6.82,178.6,6.401911
20,38.4,5.818602,52,6.39,60,6.57,75,6.86,90,7.11,110,7.45,120,7.78,135,7.82,150,7.44,179,6.991065
24,39,5.816153,52,6.4,60,6.59,75,6.91,90,7.24,110,7.53,120,8.12,135,8.67,150,8.18,178.6,7.582263

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.76	4.99	5.11	4.99	4.97	4.8	4.3	3.64
8	5.56	5.75	5.88	5.85	5.94	5.79	5.3	4.65
10	6	6.16	6.28	6.32	6.44	6.37	6.05	5.49
12	6.2	6.36	6.52	6.54	6.76	6.72	6.49	6.12
14	6.29	6.45	6.67	6.75	7.02	7.02	6.82	6.51
16	6.33	6.5	6.75	6.92	7.19	7.31	7.15	6.82
20	6.39	6.57	6.86	7.11	7.45	7.78	7.82	7.44
24	6.4	6.59	6.91	7.24	7.53	8.12	8.67	8.18

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.9°	3.14	145.8°	3.16
8	40.6°	3.78	150.5°	4.03
10	39.2°	4.18	153.8°	4.78
12	39°	4.36	161.4°	5.43
14	38.5°	4.46	175°	5.99
16	38.4°	4.51	178.6°	6.4
20	38.4°	4.56	179°	6.99
24	39°	4.52	178.6°	7.58

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