TEMPER: ORC Rating

GPH

697.6

OSN

674.9

LOA

9.38 m

Displacement

2986 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5839

Medium

0.7996

High

0.9205

Triple Offshore

Low

0.7505

Medium

0.9723

High

1.0851

Boat Specifications

Dimensions

Length overall: 9.38 m
Beam: 3.24 m
Draft: 1.75 m
Displacement: 2986 kg
Crew weight: 480 kg
Wetted surface: 17.76 m²

Sails

Mainsail: 26.73 m²
Genoa: 19.42 m²
Spinnaker: 48.7 m²
Asymmetric spinnaker: 0 m²

Design

Type: FINNFLYER 31 LF
Builder: POLAR YACHT
Designer: EIVIND STILL
Year built: 1983
Stability index: 108.2

Performance data

Polar CSV

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

6,42.9,4.286438,52,4.76,60,4.99,75,5.13,90,5.07,110,5.06,120,4.88,135,4.36,146.6,3.809077,150,3.67
8,41.2,5.063696,52,5.62,60,5.82,75,5.94,90,6.02,110,6.03,120,5.87,135,5.37,150,4.7,151.1,4.64896
10,39.4,5.538778,52,6.11,60,6.26,75,6.38,90,6.5,110,6.56,120,6.45,135,6.13,150,5.57,154.1,5.380421
12,37.8,5.77102,52,6.36,60,6.5,75,6.64,90,6.78,110,6.9,120,6.83,135,6.58,150,6.21,162.8,5.788889
14,37.5,5.899011,52,6.5,60,6.65,75,6.83,90,6.97,110,7.2,120,7.16,135,6.92,150,6.61,175.4,6.119712
16,37.2,5.963367,52,6.57,60,6.75,75,6.99,90,7.1,110,7.48,120,7.48,135,7.26,150,6.93,179,6.510992
20,37.6,6.033147,52,6.65,60,6.85,75,7.18,90,7.44,110,7.94,120,8.14,135,7.98,150,7.57,179,7.131086

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.76	4.99	5.13	5.07	5.06	4.88	4.36	3.67
8	5.62	5.82	5.94	6.02	6.03	5.87	5.37	4.7
10	6.11	6.26	6.38	6.5	6.56	6.45	6.13	5.57
12	6.36	6.5	6.64	6.78	6.9	6.83	6.58	6.21
14	6.5	6.65	6.83	6.97	7.2	7.16	6.92	6.61
16	6.57	6.75	6.99	7.1	7.48	7.48	7.26	6.93
20	6.65	6.85	7.18	7.44	7.94	8.14	7.98	7.57

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.9°	3.14	146.6°	3.18
8	41.2°	3.81	151.1°	4.07
10	39.4°	4.28	154.1°	4.84
12	37.8°	4.56	162.8°	5.53
14	37.5°	4.68	175.4°	6.1
16	37.2°	4.75	179°	6.51
20	37.6°	4.78	179°	7.13

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°	4.76	5.62	6.11	6.36	6.50	6.57	6.65
60°	4.99	5.82	6.26	6.50	6.65	6.75	6.85
75°	5.13	5.94	6.38	6.64	6.83	6.99	7.18
90°	5.07	6.02	6.50	6.78	6.97	7.10	7.44
110°	5.06	6.03	6.56	6.90	7.20	7.48	7.94
120°	4.88	5.87	6.45	6.83	7.16	7.48	8.14
135°	4.36	5.37	6.13	6.58	6.92	7.26	7.98
150°	3.67	4.70	5.57	6.21	6.61	6.93	7.57