Tora — ORC Rating | RegattaPages

GPH

688.1

OSN

668.8

LOA

9.85 m

Displacement

4760 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5916

Medium

0.8027

High

0.9252

Triple Offshore

Low

0.7621

Medium

0.984

High

1.0986

Boat Specifications

Dimensions

Length overall: 9.85 m
Beam: 3.27 m
Draft: 1.76 m
Displacement: 4760 kg
Crew weight: 542 kg
Wetted surface: 22.32 m²

Sails

Mainsail: 30.13 m²
Genoa: 29.31 m²
Spinnaker: 61.78 m²
Asymmetric spinnaker: 0 m²

Design

Type: MAMBA 33
Builder: BK Marin AB
Designer: Bengt Karlsson
Year built: 1984

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.

6,42.4,4.252119,52,4.8,60,5.07,75,5.27,90,5.2,110,5.13,120,4.97,135,4.5,147,3.946722,150,3.83
8,41.6,5.014723,52,5.64,60,5.93,75,6.14,90,6.1,110,6.17,120,6.01,135,5.47,150,4.81,152,4.722817
10,41.2,5.621898,52,6.23,60,6.41,75,6.55,90,6.62,110,6.68,120,6.6,135,6.28,150,5.64,154,5.462876
12,40.1,5.948324,52,6.5,60,6.65,75,6.8,90,6.89,110,7,120,6.93,135,6.7,150,6.33,160,5.959396
14,39.4,6.056421,52,6.63,60,6.8,75,6.98,90,7.05,110,7.32,120,7.25,135,7.01,150,6.71,180,6.22
16,39,6.112108,52,6.69,60,6.87,75,7.14,90,7.24,110,7.63,120,7.6,135,7.34,150,7,180,6.63
20,39.4,6.134068,52,6.72,60,6.92,75,7.31,90,7.61,110,7.97,120,8.21,135,8.04,150,7.64,180,7.21

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.8	5.07	5.27	5.2	5.13	4.97	4.5	3.83
8	5.64	5.93	6.14	6.1	6.17	6.01	5.47	4.81
10	6.23	6.41	6.55	6.62	6.68	6.6	6.28	5.64
12	6.5	6.65	6.8	6.89	7	6.93	6.7	6.33
14	6.63	6.8	6.98	7.05	7.32	7.25	7.01	6.71
16	6.69	6.87	7.14	7.24	7.63	7.6	7.34	7
20	6.72	6.92	7.31	7.61	7.97	8.21	8.04	7.64

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.14	147°	3.31
8	41.6°	3.75	152°	4.17
10	41.2°	4.23	154°	4.91
12	40.1°	4.55	160°	5.6
14	39.4°	4.68	180°	6.22
16	39°	4.75	180°	6.63
20	39.4°	4.74	180°	7.21

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