Wolk: ORC Rating

GPH

774.5

OSN

751.7

LOA

7.2 m

Displacement

1569 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5283

Medium

0.7174

High

0.8134

Triple Offshore

Low

0.679

Medium

0.8738

High

0.9708

Boat Specifications

Dimensions

Length overall: 7.2 m
Beam: 2.48 m
Draft: 1.4 m
Displacement: 1569 kg
Crew weight: 324 kg
Wetted surface: 12.33 m²

Sails

Mainsail: 11.95 m²
Genoa: 18.91 m²
Spinnaker: 38.54 m²
Asymmetric spinnaker: 32.29 m²

Design

Type: Mallard Start 7
Year built: 1977

Performance data

Polar CSV

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

6,42.8,3.734344,52,4.19,60,4.43,75,4.63,90,4.58,110,4.62,120,4.49,135,4.06,149,3.546566,150,3.51
8,42,4.386763,52,4.97,60,5.22,75,5.38,90,5.42,110,5.52,120,5.43,135,5.01,150,4.41,152,4.326418
10,42,4.951928,52,5.42,60,5.58,75,5.71,90,5.83,110,5.93,120,5.88,135,5.68,150,5.21,153,5.095361
12,39.8,5.180379,52,5.66,60,5.79,75,5.92,90,6.1,110,6.26,120,6.22,135,6.01,150,5.74,171,5.254694
14,39.4,5.292898,52,5.77,60,5.92,75,6.11,90,6.27,110,6.59,120,6.58,135,6.35,150,6.04,180,5.66
16,39.4,5.331721,52,5.81,60,5.98,75,6.27,90,6.42,110,6.86,120,6.92,135,6.71,150,6.35,180,5.96
20,40.9,5.318491,52,5.8,60,5.99,75,6.4,90,6.77,110,7.22,120,7.47,135,7.42,150,7,180,6.56

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.19	4.43	4.63	4.58	4.62	4.49	4.06	3.51
8	4.97	5.22	5.38	5.42	5.52	5.43	5.01	4.41
10	5.42	5.58	5.71	5.83	5.93	5.88	5.68	5.21
12	5.66	5.79	5.92	6.1	6.26	6.22	6.01	5.74
14	5.77	5.92	6.11	6.27	6.59	6.58	6.35	6.04
16	5.81	5.98	6.27	6.42	6.86	6.92	6.71	6.35
20	5.8	5.99	6.4	6.77	7.22	7.47	7.42	7

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	2.74	149°	3.04
8	42°	3.26	152°	3.82
10	42°	3.68	153°	4.54
12	39.8°	3.98	171°	5.19
14	39.4°	4.09	180°	5.66
16	39.4°	4.12	180°	5.96
20	40.9°	4.02	180°	6.56

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°	4.19	4.97	5.42	5.66	5.77	5.81	5.80
60°	4.43	5.22	5.58	5.79	5.92	5.98	5.99
75°	4.63	5.38	5.71	5.92	6.11	6.27	6.40
90°	4.58	5.42	5.83	6.10	6.27	6.42	6.77
110°	4.62	5.52	5.93	6.26	6.59	6.86	7.22
120°	4.49	5.43	5.88	6.22	6.58	6.92	7.47
135°	4.06	5.01	5.68	6.01	6.35	6.71	7.42
150°	3.51	4.41	5.21	5.74	6.04	6.35	7.00