TUNCHE: ORC Rating

GPH

614.3

OSN

598.8

LOA

9.95 m

Displacement

3862 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6625

Medium

0.8881

High

1.0005

Triple Offshore

Low

0.8612

Medium

1.0985

High

1.2267

Boat Specifications

Dimensions

Length overall: 9.95 m
Beam: 3.41 m
Draft: 1.99 m
Displacement: 3862 kg
Crew weight: 571 kg
Wetted surface: 22.83 m²

Sails

Mainsail: 35.23 m²
Genoa: 27.23 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 106.22 m²

Design

Type: J-99
Builder: J Composites
Designer: J Boats
Year built: 2018
Stability index: 117.1

Performance data

Polar CSV

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

6,43,4.621567,52,5.19,60,5.5,75,6.03,90,6.27,110,6.04,120,5.82,135,5.22,144.2,4.734523,150,4.43
8,41.8,5.52667,52,6.18,60,6.51,75,6.9,90,7.08,110,7.01,120,6.92,135,6.47,147.8,5.696099,150,5.57
10,40.2,6.153475,52,6.78,60,6.96,75,7.26,90,7.51,110,7.52,120,7.47,135,7.19,148.7,6.624076,150,6.54
12,38.8,6.415702,52,7.06,60,7.23,75,7.45,90,7.86,110,7.98,120,8.01,135,7.69,150,7.13,150.9,7.072781
14,38.2,6.515181,52,7.16,60,7.38,75,7.67,90,8.1,110,8.44,120,8.57,135,8.25,150,7.48,164,6.751543
16,38.2,6.566081,52,7.22,60,7.46,75,7.88,90,8.3,110,8.9,120,8.99,135,8.87,150,7.84,174.8,7.018887
20,37.8,6.644266,52,7.3,60,7.53,75,8.06,90,8.64,110,9.64,120,10.01,135,10.69,140.8,10.065237,150,9.01

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.19	5.5	6.03	6.27	6.04	5.82	5.22	4.43
8	6.18	6.51	6.9	7.08	7.01	6.92	6.47	5.57
10	6.78	6.96	7.26	7.51	7.52	7.47	7.19	6.54
12	7.06	7.23	7.45	7.86	7.98	8.01	7.69	7.13
14	7.16	7.38	7.67	8.1	8.44	8.57	8.25	7.48
16	7.22	7.46	7.88	8.3	8.9	8.99	8.87	7.84
20	7.3	7.53	8.06	8.64	9.64	10.01	10.69	9.01

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.38	144.2°	3.84
8	41.8°	4.12	147.8°	4.82
10	40.2°	4.7	148.7°	5.66
12	38.8°	5	150.9°	6.18
14	38.2°	5.12	164°	6.49
16	38.2°	5.16	174.8°	6.99
20	37.8°	5.25	140.8°	7.8

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°	5.19	6.18	6.78	7.06	7.16	7.22	7.30
60°	5.50	6.51	6.96	7.23	7.38	7.46	7.53
75°	6.03	6.90	7.26	7.45	7.67	7.88	8.06
90°	6.27	7.08	7.51	7.86	8.10	8.30	8.64
110°	6.04	7.01	7.52	7.98	8.44	8.90	9.64
120°	5.82	6.92	7.47	8.01	8.57	8.99	10.01
135°	5.22	6.47	7.19	7.69	8.25	8.87	10.69
150°	4.43	5.57	6.54	7.13	7.48	7.84	9.01