OVERDRIVE: ORC Rating

GPH

729.7

OSN

710.2

LOA

7.514 m

Displacement

1648 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6365

Medium

0.8561

High

0.9611

Triple Offshore

Low

0.8184

Medium

1.0395

High

1.1501

Boat Specifications

Dimensions

Length overall: 7.514 m
Beam: 2.76 m
Draft: 1.44 m
Displacement: 1648 kg
Crew weight: 377 kg
Wetted surface: 13.37 m²

Sails

Mainsail: 16.55 m²
Genoa: 18.96 m²
Spinnaker: 35.82 m²
Asymmetric spinnaker: 0 m²

Design

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

Performance data

Polar CSV

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

6,42,4.131092,52,4.67,60,4.92,75,5.1,90,5.01,110,4.86,120,4.7,135,4.2,148.3,3.631828,150,3.57
8,41.6,4.894369,52,5.46,60,5.66,75,5.79,90,5.75,110,5.76,120,5.63,135,5.14,150,4.5,152.7,4.388841
10,39.6,5.321129,52,5.83,60,5.97,75,6.09,90,6.13,110,6.18,120,6.1,135,5.85,150,5.32,153.1,5.202975
12,38.3,5.466525,52,6.01,60,6.15,75,6.31,90,6.41,110,6.55,120,6.45,135,6.21,150,5.91,170.5,5.404114
14,38.1,5.515068,52,6.08,60,6.25,75,6.51,90,6.6,110,6.94,120,6.86,135,6.56,150,6.23,180,5.84
16,38.1,5.527775,52,6.1,60,6.3,75,6.65,90,6.85,110,7.28,120,7.27,135,6.96,150,6.56,180,6.17
20,39.4,5.512896,52,6.07,60,6.29,75,6.73,90,7.17,110,7.71,120,8.09,135,7.87,150,7.32,180,6.83

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.67	4.92	5.1	5.01	4.86	4.7	4.2	3.57
8	5.46	5.66	5.79	5.75	5.76	5.63	5.14	4.5
10	5.83	5.97	6.09	6.13	6.18	6.1	5.85	5.32
12	6.01	6.15	6.31	6.41	6.55	6.45	6.21	5.91
14	6.08	6.25	6.51	6.6	6.94	6.86	6.56	6.23
16	6.1	6.3	6.65	6.85	7.28	7.27	6.96	6.56
20	6.07	6.29	6.73	7.17	7.71	8.09	7.87	7.32

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.07	148.3°	3.09
8	41.6°	3.66	152.7°	3.9
10	39.6°	4.1	153.1°	4.64
12	38.3°	4.29	170.5°	5.33
14	38.1°	4.34	180°	5.84
16	38.1°	4.35	180°	6.17
20	39.4°	4.26	180°	6.83

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°	4.67	5.46	5.83	6.01	6.08	6.10	6.07
60°	4.92	5.66	5.97	6.15	6.25	6.30	6.29
75°	5.10	5.79	6.09	6.31	6.51	6.65	6.73
90°	5.01	5.75	6.13	6.41	6.60	6.85	7.17
110°	4.86	5.76	6.18	6.55	6.94	7.28	7.71
120°	4.70	5.63	6.10	6.45	6.86	7.27	8.09
135°	4.20	5.14	5.85	6.21	6.56	6.96	7.87
150°	3.57	4.50	5.32	5.91	6.23	6.56	7.32