Djinn: ORC Rating

GPH

657.6

OSN

639.3

LOA

8.032 m

Displacement

1450 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6303

Medium

0.8319

High

0.9534

Triple Offshore

Low

0.8084

Medium

1.0217

High

1.1601

Boat Specifications

Dimensions

Length overall: 8.032 m
Beam: 2.49 m
Draft: 1.5 m
Displacement: 1450 kg
Crew weight: 390 kg
Wetted surface: 13 m²

Sails

Mainsail: 21.82 m²
Genoa: 13.97 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 65.16 m²

Design

Type: J/80
Builder: J/Composites, Fran
Designer: Rod Johnstone
Year built: 1992
Stability index: 108.9

Performance data

Polar CSV

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

6,43,4.361775,52,4.89,60,5.17,75,5.39,90,5.55,110,5.68,120,5.54,135,4.99,145.1,4.499167,150,4.26
8,41.8,5.218143,52,5.82,60,6.03,75,6.17,90,6.35,110,6.49,120,6.44,135,6.1,147.8,5.471564,150,5.35
10,39.4,5.719953,52,6.26,60,6.4,75,6.54,90,6.63,110,7.05,120,7.04,135,6.72,150,6.16,150.1,6.159903
12,38.1,5.870879,52,6.45,60,6.64,75,6.88,90,6.94,110,7.46,120,7.68,135,7.35,149.6,6.701343,150,6.67
14,37.5,5.92422,52,6.53,60,6.77,75,7.18,90,7.35,110,7.8,120,8.22,135,8.08,146.8,7.409494,150,7.15
16,37.3,5.933573,52,6.58,60,6.85,75,7.35,90,7.75,110,8.13,120,8.66,135,8.99,144.3,8.287325,150,7.77
20,37.5,6.025058,52,6.7,60,7,75,7.5,90,8.23,110,8.78,120,9.59,135,11.3,141,11.349219,150,10.18

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.89	5.17	5.39	5.55	5.68	5.54	4.99	4.26
8	5.82	6.03	6.17	6.35	6.49	6.44	6.1	5.35
10	6.26	6.4	6.54	6.63	7.05	7.04	6.72	6.16
12	6.45	6.64	6.88	6.94	7.46	7.68	7.35	6.67
14	6.53	6.77	7.18	7.35	7.8	8.22	8.08	7.15
16	6.58	6.85	7.35	7.75	8.13	8.66	8.99	7.77
20	6.7	7	7.5	8.23	8.78	9.59	11.3	10.18

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.19	145.1°	3.69
8	41.8°	3.89	147.8°	4.63
10	39.4°	4.42	150.1°	5.34
12	38.1°	4.62	149.6°	5.78
14	37.5°	4.7	146.8°	6.2
16	37.3°	4.72	144.3°	6.73
20	37.5°	4.78	141°	8.82

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°	4.89	5.82	6.26	6.45	6.53	6.58	6.70
60°	5.17	6.03	6.40	6.64	6.77	6.85	7.00
75°	5.39	6.17	6.54	6.88	7.18	7.35	7.50
90°	5.55	6.35	6.63	6.94	7.35	7.75	8.23
110°	5.68	6.49	7.05	7.46	7.80	8.13	8.78
120°	5.54	6.44	7.04	7.68	8.22	8.66	9.59
135°	4.99	6.10	6.72	7.35	8.08	8.99	11.30
150°	4.26	5.35	6.16	6.67	7.15	7.77	10.18