TRADEWIND — ORC Rating

GPH

823.7

OSN

792.4

LOA

7.85 m

Displacement

2177 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5335

Medium

0.7584

High

0.891

Triple Offshore

Low

0.6888

Medium

0.9384

High

1.0687

Boat Specifications

Dimensions

Length overall: 7.85 m
Beam: 2.74 m
Draft: 1.41 m
Displacement: 2177 kg
Crew weight: 240 kg
Wetted surface: 16.36 m²

Sails

Mainsail: 12.61 m²
Genoa: 19.52 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 0 m²

Design

Type: SADLER 26
Builder: FORTUNA, CAPE TOWN
Designer: DAVID SADLER
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.

6,44.3,3.618871,52,4,60,4.24,75,4.41,90,4.33,110,4.01,120,3.73,135,3.28,150,2.86,161.1,2.642468
8,42.2,4.265632,52,4.76,60,5.02,75,5.24,90,5.19,110,4.9,120,4.63,135,4.19,150,3.74,166.3,3.396637
10,41.3,4.765301,52,5.36,60,5.6,75,5.79,90,5.8,110,5.64,120,5.4,135,4.94,150,4.48,170.4,4.077095
12,41.3,5.19125,52,5.73,60,5.91,75,6.07,90,6.1,110,6.05,120,5.92,135,5.59,150,5.15,172.5,4.690125
14,41,5.339802,52,5.89,60,6.06,75,6.24,90,6.34,110,6.31,120,6.22,135,6.01,150,5.71,173.2,5.287193
16,40.8,5.376521,52,5.93,60,6.12,75,6.37,90,6.54,110,6.54,120,6.46,135,6.27,150,6.07,176.9,5.748412
20,42.1,5.350579,52,5.9,60,6.12,75,6.47,90,6.8,110,7.05,120,7,135,6.78,150,6.55,179.1,6.300777

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4	4.24	4.41	4.33	4.01	3.73	3.28	2.86
8	4.76	5.02	5.24	5.19	4.9	4.63	4.19	3.74
10	5.36	5.6	5.79	5.8	5.64	5.4	4.94	4.48
12	5.73	5.91	6.07	6.1	6.05	5.92	5.59	5.15
14	5.89	6.06	6.24	6.34	6.31	6.22	6.01	5.71
16	5.93	6.12	6.37	6.54	6.54	6.46	6.27	6.07
20	5.9	6.12	6.47	6.8	7.05	7	6.78	6.55

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.3°	2.59	161.1°	2.5
8	42.2°	3.16	166.3°	3.3
10	41.3°	3.58	170.4°	4.02
12	41.3°	3.9	172.5°	4.65
14	41°	4.03	173.2°	5.25
16	40.8°	4.07	176.9°	5.74
20	42.1°	3.97	179.1°	6.3

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