PAPERISSIMA: ORC Rating

GPH

687.3

OSN

667.4

LOA

9.12 m

Displacement

2747 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5978

Medium

0.8087

High

0.9236

Triple Offshore

Low

0.7681

Medium

0.9825

High

1.0946

Boat Specifications

Dimensions

Length overall: 9.12 m
Beam: 3.25 m
Draft: 1.78 m
Displacement: 2747 kg
Crew weight: 450 kg
Wetted surface: 17.11 m²

Sails

Mainsail: 31.5 m²
Genoa: 19.55 m²
Spinnaker: 52.79 m²
Asymmetric spinnaker: 0 m²

Design

Type: Duck 31
Builder: Avallone
Designer: Paperini
Year built: 1982
Stability index: 114.5

Performance data

Polar CSV

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

6,41.8,4.265731,52,4.8,60,5.06,75,5.25,90,5.26,110,5.23,120,5.04,135,4.54,146.9,3.998956,150,3.87
8,41.8,5.084,52,5.67,60,5.89,75,6.03,90,6.15,110,6.16,120,6.02,135,5.55,150,4.84,152,4.756794
10,40,5.613251,52,6.15,60,6.29,75,6.4,90,6.59,110,6.61,120,6.51,135,6.23,150,5.72,153.8,5.550241
12,38.2,5.815308,52,6.37,60,6.52,75,6.68,90,6.89,110,7.04,120,6.92,135,6.63,150,6.29,164.6,5.870788
14,37.6,5.894309,52,6.48,60,6.68,75,6.92,90,7.07,110,7.4,120,7.32,135,7.02,150,6.66,178.4,6.202418
16,37.6,5.944796,52,6.54,60,6.76,75,7.09,90,7.29,110,7.69,120,7.69,135,7.4,150,7.04,179,6.571001
20,37.5,5.999849,52,6.6,60,6.82,75,7.26,90,7.64,110,8.02,120,8.32,135,8.17,150,7.75,179,7.271107

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.8	5.06	5.25	5.26	5.23	5.04	4.54	3.87
8	5.67	5.89	6.03	6.15	6.16	6.02	5.55	4.84
10	6.15	6.29	6.4	6.59	6.61	6.51	6.23	5.72
12	6.37	6.52	6.68	6.89	7.04	6.92	6.63	6.29
14	6.48	6.68	6.92	7.07	7.4	7.32	7.02	6.66
16	6.54	6.76	7.09	7.29	7.69	7.69	7.4	7.04
20	6.6	6.82	7.26	7.64	8.02	8.32	8.17	7.75

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.8°	3.18	146.9°	3.35
8	41.8°	3.79	152°	4.2
10	40°	4.3	153.8°	4.98
12	38.2°	4.57	164.6°	5.66
14	37.6°	4.67	178.4°	6.2
16	37.6°	4.71	179°	6.57
20	37.5°	4.76	179°	7.27

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°	4.80	5.67	6.15	6.37	6.48	6.54	6.60
60°	5.06	5.89	6.29	6.52	6.68	6.76	6.82
75°	5.25	6.03	6.40	6.68	6.92	7.09	7.26
90°	5.26	6.15	6.59	6.89	7.07	7.29	7.64
110°	5.23	6.16	6.61	7.04	7.40	7.69	8.02
120°	5.04	6.02	6.51	6.92	7.32	7.69	8.32
135°	4.54	5.55	6.23	6.63	7.02	7.40	8.17
150°	3.87	4.84	5.72	6.29	6.66	7.04	7.75