OVERDRIVE: ORC Rating

GPH

737.1

OSN

715.7

LOA

7.514 m

Displacement

1647 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5561

Medium

0.7537

High

0.8508

Triple Offshore

Low

0.716

Medium

0.9172

High

1.0172

Boat Specifications

Dimensions

Length overall: 7.514 m
Beam: 2.76 m
Draft: 1.44 m
Displacement: 1647 kg
Crew weight: 377 kg
Wetted surface: 13.32 m²

Sails

Mainsail: 16.55 m²
Genoa: 18.96 m²
Spinnaker: 36.02 m²
Asymmetric spinnaker: 0 m²

Design

Type: Extension
Builder: Jachtw. M'harnis
Designer: Jac. de Ridder
Year built: 1990
Stability index: 93.2

Performance data

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into Offwind or compatible navigation software.

6,42.6,4.075549,52,4.58,60,4.83,75,5,90,4.91,110,4.8,120,4.63,135,4.12,147.8,3.59256,150,3.51
8,42,4.830821,52,5.39,60,5.61,75,5.74,90,5.7,110,5.72,120,5.59,135,5.07,150,4.46,152.9,4.347275
10,40.2,5.28937,52,5.8,60,5.94,75,6.05,90,6.11,110,6.16,120,6.07,135,5.82,150,5.3,152.9,5.167304
12,38.8,5.453347,52,5.99,60,6.13,75,6.28,90,6.39,110,6.52,120,6.42,135,6.19,150,5.89,164,5.503184
14,38.4,5.512359,52,6.06,60,6.24,75,6.49,90,6.59,110,6.91,120,6.83,135,6.54,150,6.22,177.5,5.805526
16,38.4,5.525119,52,6.09,60,6.29,75,6.63,90,6.83,110,7.25,120,7.24,135,6.94,150,6.56,179,6.140935
20,39.4,5.512896,52,6.08,60,6.3,75,6.73,90,7.17,110,7.68,120,8.06,135,7.85,150,7.33,179,6.791034

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.58	4.83	5	4.91	4.8	4.63	4.12	3.51
8	5.39	5.61	5.74	5.7	5.72	5.59	5.07	4.46
10	5.8	5.94	6.05	6.11	6.16	6.07	5.82	5.3
12	5.99	6.13	6.28	6.39	6.52	6.42	6.19	5.89
14	6.06	6.24	6.49	6.59	6.91	6.83	6.54	6.22
16	6.09	6.29	6.63	6.83	7.25	7.24	6.94	6.56
20	6.08	6.3	6.73	7.17	7.68	8.06	7.85	7.33

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3	147.8°	3.04
8	42°	3.59	152.9°	3.87
10	40.2°	4.04	152.9°	4.6
12	38.8°	4.25	164°	5.29
14	38.4°	4.32	177.5°	5.8
16	38.4°	4.33	179°	6.14
20	39.4°	4.26	179°	6.79

VPP POLAR · BOAT SPEED BY TWAKT

TRUE WIND ANGLE —

READ AT ANGLE

Hover or tap the chart, or use the slider, to read boat speeds.

True wind speed 6 kt8 kt10 kt12 kt14 kt16 kt20 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 6 kt (kt)	Boat speed in 8 kt (kt)	Boat speed in 10 kt (kt)	Boat speed in 12 kt (kt)	Boat speed in 14 kt (kt)	Boat speed in 16 kt (kt)	Boat speed in 20 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	4.58	5.39	5.80	5.99	6.06	6.09	6.08
60°	4.83	5.61	5.94	6.13	6.24	6.29	6.30
75°	5.00	5.74	6.05	6.28	6.49	6.63	6.73
90°	4.91	5.70	6.11	6.39	6.59	6.83	7.17
110°	4.80	5.72	6.16	6.52	6.91	7.25	7.68
120°	4.63	5.59	6.07	6.42	6.83	7.24	8.06
135°	4.12	5.07	5.82	6.19	6.54	6.94	7.85
150°	3.51	4.46	5.30	5.89	6.22	6.56	7.33