Balancing Act — ORC Rating

GPH

610.9

OSN

591.7

LOA

9.94 m

Displacement

3876 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6681

Medium

0.9072

High

1.0451

Triple Offshore

Low

0.8607

Medium

1.1058

High

1.2496

Boat Specifications

Dimensions

Length overall: 9.94 m
Beam: 3.41 m
Draft: 1.99 m
Displacement: 3876 kg
Crew weight: 559 kg
Wetted surface: 22.94 m²

Sails

Mainsail: 33.87 m²
Genoa: 25.93 m²
Spinnaker: 94.7 m²
Asymmetric spinnaker: 92.13 m²

Design

Type: J 99 2.0
Builder: J Boats
Designer: Alan Johnstone
Year built: 2018
Stability index: 126.1

Velocity Prediction

Polar CSV

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

4,43.2,3.402067,52,3.88,60,4.14,75,4.35,90,4.59,110,4.43,120,4.29,135,3.75,143.1,3.351321,150,3.09
6,43.2,4.718996,52,5.25,60,5.53,75,5.8,90,6.04,110,5.95,120,5.8,135,5.23,143.1,4.776883,150,4.41
8,41.1,5.586789,52,6.22,60,6.44,75,6.74,90,6.93,110,6.97,120,6.86,135,6.39,147.3,5.704027,150,5.55
10,39,6.150711,52,6.79,60,6.95,75,7.2,90,7.4,110,7.52,120,7.44,135,7.1,150,6.47,153.2,6.28511
12,37.2,6.452991,52,7.11,60,7.25,75,7.45,90,7.75,110,7.97,120,7.92,135,7.6,150,7.1,160.1,6.710709
14,36.4,6.609568,52,7.29,60,7.46,75,7.66,90,8.02,110,8.39,120,8.4,135,8.08,150,7.56,167.1,7.037621
16,36,6.687128,52,7.4,60,7.61,75,7.88,90,8.21,110,8.76,120,8.95,135,8.6,150,8.01,170.9,7.382923
20,36.1,6.769887,52,7.5,60,7.74,75,8.17,90,8.5,110,9.61,120,10.3,135,10.21,150,9.05,169.6,8.255628
24,36.9,6.802681,52,7.53,60,7.8,75,8.31,90,8.9,110,10.76,120,12.16,135,13.72,140.8,13.007383,150,11.64

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
4	3.88	4.14	4.35	4.59	4.43	4.29	3.75	3.09
6	5.25	5.53	5.8	6.04	5.95	5.8	5.23	4.41
8	6.22	6.44	6.74	6.93	6.97	6.86	6.39	5.55
10	6.79	6.95	7.2	7.4	7.52	7.44	7.1	6.47
12	7.11	7.25	7.45	7.75	7.97	7.92	7.6	7.1
14	7.29	7.46	7.66	8.02	8.39	8.4	8.08	7.56
16	7.4	7.61	7.88	8.21	8.76	8.95	8.6	8.01
20	7.5	7.74	8.17	8.5	9.61	10.3	10.21	9.05
24	7.53	7.8	8.31	8.9	10.76	12.16	13.72	11.64

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
4	43.2°	2.48	143.1°	2.68
6	43.2°	3.44	143.1°	3.82
8	41.1°	4.21	147.3°	4.8
10	39°	4.78	153.2°	5.61
12	37.2°	5.14	160.1°	6.31
14	36.4°	5.32	167.1°	6.86
16	36°	5.41	170.9°	7.29
20	36.1°	5.47	169.6°	8.12
24	36.9°	5.44	140.8°	10.08

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