Bonnie XI: ORC Rating

GPH

769.8

OSN

743.9

LOA

8.5 m

Displacement

3175 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5906

Medium

0.8148

High

0.935

Triple Offshore

Low

0.7562

Medium

0.9958

High

1.1113

Boat Specifications

Dimensions

Length overall: 8.5 m
Beam: 2.86 m
Draft: 1.69 m
Displacement: 3175 kg
Crew weight: 426 kg
Wetted surface: 17.75 m²

Sails

Mainsail: 18.9 m²
Genoa: 23.17 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 0 m²

Design

Type: CUMULUS
Builder: Albin
Designer: Peter Norlin
Year built: 1982

Performance data

Polar CSV

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

6,41.7,3.924257,52,4.39,60,4.6,75,4.76,90,4.7,110,4.37,120,4.11,135,3.63,150,3.16,158.2,2.961812
8,40.4,4.582829,52,5.19,60,5.44,75,5.62,90,5.56,110,5.26,120,4.97,135,4.51,150,4.06,166.6,3.69047
10,40.8,5.191579,52,5.77,60,5.94,75,6.06,90,6.05,110,5.92,120,5.72,135,5.27,150,4.79,171.9,4.353431
12,40.4,5.48889,52,6,60,6.16,75,6.3,90,6.33,110,6.25,120,6.14,135,5.87,150,5.47,173.2,4.985067
14,39.9,5.526841,52,6.09,60,6.27,75,6.46,90,6.57,110,6.5,120,6.4,135,6.21,150,5.97,175.4,5.577967
16,40.1,5.556126,52,6.12,60,6.31,75,6.58,90,6.78,110,6.75,120,6.65,135,6.46,150,6.27,178.6,6.001792
20,40.8,5.574673,52,6.11,60,6.3,75,6.67,90,7,110,7.25,120,7.19,135,6.97,150,6.76,179.3,6.510486

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.39	4.6	4.76	4.7	4.37	4.11	3.63	3.16
8	5.19	5.44	5.62	5.56	5.26	4.97	4.51	4.06
10	5.77	5.94	6.06	6.05	5.92	5.72	5.27	4.79
12	6	6.16	6.3	6.33	6.25	6.14	5.87	5.47
14	6.09	6.27	6.46	6.57	6.5	6.4	6.21	5.97
16	6.12	6.31	6.58	6.78	6.75	6.65	6.46	6.27
20	6.11	6.3	6.67	7	7.25	7.19	6.97	6.76

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.7°	2.93	158.2°	2.75
8	40.4°	3.49	166.6°	3.59
10	40.8°	3.93	171.9°	4.31
12	40.4°	4.18	173.2°	4.95
14	39.9°	4.24	175.4°	5.56
16	40.1°	4.25	178.6°	6
20	40.8°	4.22	179.3°	6.51

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°	4.39	5.19	5.77	6.00	6.09	6.12	6.11
60°	4.60	5.44	5.94	6.16	6.27	6.31	6.30
75°	4.76	5.62	6.06	6.30	6.46	6.58	6.67
90°	4.70	5.56	6.05	6.33	6.57	6.78	7.00
110°	4.37	5.26	5.92	6.25	6.50	6.75	7.25
120°	4.11	4.97	5.72	6.14	6.40	6.65	7.19
135°	3.63	4.51	5.27	5.87	6.21	6.46	6.97
150°	3.16	4.06	4.79	5.47	5.97	6.27	6.76