Belle: ORC Rating

GPH

482.5

OSN

468.1

LOA

18.194 m

Displacement

18413 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.8342

Medium

1.1353

High

1.3039

Triple Offshore

Low

1.0796

Medium

1.4074

High

1.585

Boat Specifications

Dimensions

Length overall: 18.194 m
Beam: 4.79 m
Draft: 3.37 m
Displacement: 18413 kg
Crew weight: 700 kg
Wetted surface: 60.47 m²

Sails

Mainsail: 100.08 m²
Genoa: 76.51 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 280.74 m²

Design

Type: IY60
Builder: Brent Gray Project
Designer: Simonis Voogd
Year built: 2003
Stability index: -1

Performance data

Polar CSV

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

4,43.6,4.363605,52,4.95,60,5.32,75,5.61,90,5.46,110,5.24,120,5.05,135,4.46,140.6,4.154084,150,3.71
6,43.6,6.103524,52,6.78,60,7.18,75,7.47,90,7.32,110,7.25,120,7.07,135,6.37,140.6,5.952893,150,5.31
8,41.6,7.274691,52,8.13,60,8.49,75,8.71,90,8.6,110,8.78,120,8.67,135,8.02,141.9,7.421197,150,6.74
10,39.8,7.965809,52,8.91,60,9.2,75,9.39,90,9.34,110,9.65,120,9.61,135,9.14,145.4,8.419018,150,8
12,38.7,8.277484,52,9.26,60,9.55,75,9.8,90,9.82,110,10.18,120,10.25,135,9.83,150,9.01,151.5,8.886946
14,37.9,8.452838,52,9.44,60,9.73,75,10.1,90,10.22,110,10.55,120,10.84,135,10.47,150,9.68,153.5,9.430859
16,37.4,8.57235,52,9.57,60,9.86,75,10.3,90,10.59,110,10.89,120,11.31,135,11.15,150,10.23,154.6,9.874517
20,37.4,8.798932,52,9.74,60,10.05,75,10.59,90,11.13,110,11.52,120,12.15,135,12.86,148.7,11.621391,150,11.47
24,37.7,8.884973,52,9.82,60,10.15,75,10.77,90,11.48,110,12.04,120,13,135,14.65,144.9,14.129443,150,13.34

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
4	4.95	5.32	5.61	5.46	5.24	5.05	4.46	3.71
6	6.78	7.18	7.47	7.32	7.25	7.07	6.37	5.31
8	8.13	8.49	8.71	8.6	8.78	8.67	8.02	6.74
10	8.91	9.2	9.39	9.34	9.65	9.61	9.14	8
12	9.26	9.55	9.8	9.82	10.18	10.25	9.83	9.01
14	9.44	9.73	10.1	10.22	10.55	10.84	10.47	9.68
16	9.57	9.86	10.3	10.59	10.89	11.31	11.15	10.23
20	9.74	10.05	10.59	11.13	11.52	12.15	12.86	11.47
24	9.82	10.15	10.77	11.48	12.04	13	14.65	13.34

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
4	43.6°	3.16	140.6°	3.21
6	43.6°	4.42	140.6°	4.6
8	41.6°	5.44	141.9°	5.84
10	39.8°	6.12	145.4°	6.93
12	38.7°	6.46	151.5°	7.81
14	37.9°	6.67	153.5°	8.44
16	37.4°	6.81	154.6°	8.92
20	37.4°	6.99	148.7°	9.93
24	37.7°	7.03	144.9°	11.56

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 4 kt6 kt8 kt10 kt12 kt14 kt16 kt20 kt24 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 4 kt (kt)	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)	Boat speed in 24 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	4.95	6.78	8.13	8.91	9.26	9.44	9.57	9.74	9.82
60°	5.32	7.18	8.49	9.20	9.55	9.73	9.86	10.05	10.15
75°	5.61	7.47	8.71	9.39	9.80	10.10	10.30	10.59	10.77
90°	5.46	7.32	8.60	9.34	9.82	10.22	10.59	11.13	11.48
110°	5.24	7.25	8.78	9.65	10.18	10.55	10.89	11.52	12.04
120°	5.05	7.07	8.67	9.61	10.25	10.84	11.31	12.15	13.00
135°	4.46	6.37	8.02	9.14	9.83	10.47	11.15	12.86	14.65
150°	3.71	5.31	6.74	8.00	9.01	9.68	10.23	11.47	13.34