Wolk: ORC Rating

GPH

774.7

OSN

751.7

LOA

7.2 m

Displacement

1569 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5939

Medium

0.8073

High

0.9164

Triple Offshore

Low

0.7632

Medium

0.983

High

1.0926

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: 12.37 m²

Sails

Mainsail: 11.95 m²
Genoa: 18.91 m²
Spinnaker: 38.54 m²
Asymmetric spinnaker: 31.87 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.

6,42.7,3.741931,52,4.2,60,4.44,75,4.63,90,4.58,110,4.62,120,4.47,135,4.04,148.7,3.546104,150,3.5
8,42.2,4.414119,52,4.97,60,5.22,75,5.38,90,5.41,110,5.51,120,5.43,135,5,150,4.39,152.3,4.291876
10,41.8,4.949858,52,5.42,60,5.58,75,5.71,90,5.83,110,5.92,120,5.87,135,5.68,150,5.2,152.5,5.10704
12,39.7,5.185862,52,5.66,60,5.79,75,5.92,90,6.09,110,6.25,120,6.21,135,6.01,150,5.73,171.8,5.233506
14,39.2,5.290702,52,5.77,60,5.92,75,6.11,90,6.27,110,6.58,120,6.56,135,6.34,150,6.03,180,5.65
16,39.1,5.321847,52,5.81,60,5.99,75,6.27,90,6.41,110,6.84,120,6.91,135,6.7,150,6.34,180,5.95
20,40.8,5.336891,52,5.8,60,6,75,6.4,90,6.76,110,7.21,120,7.45,135,7.4,150,6.98,180,6.54

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.2	4.44	4.63	4.58	4.62	4.47	4.04	3.5
8	4.97	5.22	5.38	5.41	5.51	5.43	5	4.39
10	5.42	5.58	5.71	5.83	5.92	5.87	5.68	5.2
12	5.66	5.79	5.92	6.09	6.25	6.21	6.01	5.73
14	5.77	5.92	6.11	6.27	6.58	6.56	6.34	6.03
16	5.81	5.99	6.27	6.41	6.84	6.91	6.7	6.34
20	5.8	6	6.4	6.76	7.21	7.45	7.4	6.98

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.7°	2.75	148.7°	3.03
8	42.2°	3.27	152.3°	3.8
10	41.8°	3.69	152.5°	4.53
12	39.7°	3.99	171.8°	5.18
14	39.2°	4.1	180°	5.65
16	39.1°	4.13	180°	5.95
20	40.8°	4.04	180°	6.54

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°	4.20	4.97	5.42	5.66	5.77	5.81	5.80
60°	4.44	5.22	5.58	5.79	5.92	5.99	6.00
75°	4.63	5.38	5.71	5.92	6.11	6.27	6.40
90°	4.58	5.41	5.83	6.09	6.27	6.41	6.76
110°	4.62	5.51	5.92	6.25	6.58	6.84	7.21
120°	4.47	5.43	5.87	6.21	6.56	6.91	7.45
135°	4.04	5.00	5.68	6.01	6.34	6.70	7.40
150°	3.50	4.39	5.20	5.73	6.03	6.34	6.98