VIOLA: ORC Rating

GPH

616.6

OSN

599.7

LOA

12.1 m

Displacement

7434 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7559

Medium

1.009

High

1.1509

Triple Offshore

Low

0.9661

Medium

1.2313

High

1.3633

Boat Specifications

Dimensions

Length overall: 12.1 m
Beam: 3.88 m
Draft: 2.18 m
Displacement: 7434 kg
Crew weight: 640 kg
Wetted surface: 30.33 m²

Sails

Mainsail: 34.97 m²
Genoa: 60.68 m²
Spinnaker: 122.17 m²
Asymmetric spinnaker: 0 m²

Design

Type: PROTO
Builder: MINNEFORD
Designer: PETERSON
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.

6,41.5,4.873452,52,5.46,60,5.71,75,5.9,90,5.82,110,5.58,120,5.45,135,4.99,146,4.463006,150,4.27
8,40.8,5.719985,52,6.44,60,6.68,75,6.83,90,6.8,110,6.77,120,6.63,135,6.11,150,5.33,150.4,5.301929
10,40.3,6.359252,52,6.98,60,7.13,75,7.25,90,7.26,110,7.36,120,7.29,135,6.98,150,6.27,150.6,6.232684
12,38.8,6.544016,52,7.2,60,7.35,75,7.5,90,7.54,110,7.71,120,7.68,135,7.44,150,7.02,156.4,6.722229
14,38.4,6.660768,52,7.29,60,7.47,75,7.69,90,7.78,110,8.03,120,8.05,135,7.8,150,7.43,173.6,6.812456
16,38.1,6.722283,52,7.34,60,7.53,75,7.84,90,8.01,110,8.24,120,8.42,135,8.19,150,7.77,180,7.26
20,38.2,6.706056,52,7.37,60,7.58,75,7.99,90,8.37,110,8.56,120,8.89,135,8.98,150,8.5,180,7.93

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.46	5.71	5.9	5.82	5.58	5.45	4.99	4.27
8	6.44	6.68	6.83	6.8	6.77	6.63	6.11	5.33
10	6.98	7.13	7.25	7.26	7.36	7.29	6.98	6.27
12	7.2	7.35	7.5	7.54	7.71	7.68	7.44	7.02
14	7.29	7.47	7.69	7.78	8.03	8.05	7.8	7.43
16	7.34	7.53	7.84	8.01	8.24	8.42	8.19	7.77
20	7.37	7.58	7.99	8.37	8.56	8.89	8.98	8.5

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.5°	3.65	146°	3.7
8	40.8°	4.33	150.4°	4.61
10	40.3°	4.85	150.6°	5.43
12	38.8°	5.1	156.4°	6.16
14	38.4°	5.22	173.6°	6.77
16	38.1°	5.29	180°	7.26
20	38.2°	5.27	180°	7.93

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°	5.46	6.44	6.98	7.20	7.29	7.34	7.37
60°	5.71	6.68	7.13	7.35	7.47	7.53	7.58
75°	5.90	6.83	7.25	7.50	7.69	7.84	7.99
90°	5.82	6.80	7.26	7.54	7.78	8.01	8.37
110°	5.58	6.77	7.36	7.71	8.03	8.24	8.56
120°	5.45	6.63	7.29	7.68	8.05	8.42	8.89
135°	4.99	6.11	6.98	7.44	7.80	8.19	8.98
150°	4.27	5.33	6.27	7.02	7.43	7.77	8.50