IMPULSION: ORC Rating

GPH

681.5

OSN

665.7

LOA

7.5 m

Displacement

1135 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.625

Medium

0.8054

High

0.8946

Triple Offshore

Low

0.7963

Medium

0.9781

High

1.0881

Boat Specifications

Dimensions

Length overall: 7.5 m
Beam: 2.78 m
Draft: 1.4 m
Displacement: 1135 kg
Crew weight: 337 kg
Wetted surface: 11.36 m²

Sails

Mainsail: 21.38 m²
Genoa: 19.39 m²
Spinnaker: 35.19 m²
Asymmetric spinnaker: 0 m²

Design

Type: PROTOQUARTERTON79
Builder: PICHAVANT
Designer: JOUBERT / NIVELT
Year built: 1979

Performance data

Polar CSV

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

6,42,4.628977,52,5.19,60,5.42,75,5.6,90,5.57,110,5.31,120,5.13,135,4.63,147,4.042112,150,3.91
8,40.1,5.333881,52,5.83,60,5.95,75,6.06,90,6.08,110,6.04,120,5.93,135,5.58,150,4.91,151,4.859255
10,37.9,5.525393,52,6.06,60,6.23,75,6.43,90,6.48,110,6.55,120,6.43,135,6.1,150,5.69,157.5,5.411961
12,37.1,5.57935,52,6.15,60,6.36,75,6.7,90,6.89,110,7.09,120,6.96,135,6.58,150,6.16,180,5.65
14,37.1,5.616964,52,6.2,60,6.43,75,6.84,90,7.23,110,7.59,120,7.56,135,7.08,150,6.6,180,6.09
16,37.1,5.629502,52,6.22,60,6.47,75,6.93,90,7.43,110,7.93,120,8.3,135,7.69,150,7.08,180,6.5
20,38.4,5.678241,52,6.31,60,6.62,75,7.07,90,7.6,110,8.59,120,9.52,135,9.72,150,8.38,180,7.43

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.19	5.42	5.6	5.57	5.31	5.13	4.63	3.91
8	5.83	5.95	6.06	6.08	6.04	5.93	5.58	4.91
10	6.06	6.23	6.43	6.48	6.55	6.43	6.1	5.69
12	6.15	6.36	6.7	6.89	7.09	6.96	6.58	6.16
14	6.2	6.43	6.84	7.23	7.59	7.56	7.08	6.6
16	6.22	6.47	6.93	7.43	7.93	8.3	7.69	7.08
20	6.31	6.62	7.07	7.6	8.59	9.52	9.72	8.38

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.44	147°	3.39
8	40.1°	4.08	151°	4.25
10	37.9°	4.36	157.5°	5
12	37.1°	4.45	180°	5.65
14	37.1°	4.48	180°	6.09
16	37.1°	4.49	180°	6.5
20	38.4°	4.45	180°	7.43

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°	5.19	5.83	6.06	6.15	6.20	6.22	6.31
60°	5.42	5.95	6.23	6.36	6.43	6.47	6.62
75°	5.60	6.06	6.43	6.70	6.84	6.93	7.07
90°	5.57	6.08	6.48	6.89	7.23	7.43	7.60
110°	5.31	6.04	6.55	7.09	7.59	7.93	8.59
120°	5.13	5.93	6.43	6.96	7.56	8.30	9.52
135°	4.63	5.58	6.10	6.58	7.08	7.69	9.72
150°	3.91	4.91	5.69	6.16	6.60	7.08	8.38