JULECHKA: ORC Rating

GPH

764.7

OSN

748.6

LOA

8.55 m

Displacement

2340 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5452

Medium

0.7129

High

0.7922

Triple Offshore

Low

0.7028

Medium

0.8799

High

0.9526

Boat Specifications

Dimensions

Length overall: 8.55 m
Beam: 2.01 m
Draft: 1.23 m
Displacement: 2340 kg
Crew weight: 185 kg
Wetted surface: 14.26 m²

Sails

Mainsail: 17.85 m²
Genoa: 20 m²
Spinnaker: 38.52 m²
Asymmetric spinnaker: 0 m²

Design

Type: RJ 85
Builder: Jakobssen
Year built: 1969

Performance data

Polar CSV

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

6,42.8,3.966037,52,4.41,60,4.65,75,4.86,90,4.83,110,4.77,120,4.62,135,4.13,149,3.569898,150,3.53
8,41.2,4.545364,52,5.16,60,5.43,75,5.62,90,5.64,110,5.7,120,5.6,135,5.08,150,4.44,153,4.320956
10,42.8,5.01547,52,5.56,60,5.77,75,5.95,90,6,110,6.11,120,6.07,135,5.85,150,5.3,151,5.247995
12,42.8,5.179018,52,5.69,60,5.9,75,6.11,90,6.21,110,6.37,120,6.36,135,6.19,150,5.9,167.5,5.428681
14,42.8,5.247163,52,5.74,60,5.96,75,6.2,90,6.36,110,6.52,120,6.63,135,6.48,150,6.21,180,5.83
16,43.3,5.290113,52,5.77,60,5.98,75,6.25,90,6.49,110,6.64,120,6.86,135,6.78,150,6.48,180,6.15
20,44.2,5.31447,52,5.76,60,5.97,75,6.28,90,6.62,110,6.85,120,7.13,135,7.41,150,7.09,180,6.69

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.41	4.65	4.86	4.83	4.77	4.62	4.13	3.53
8	5.16	5.43	5.62	5.64	5.7	5.6	5.08	4.44
10	5.56	5.77	5.95	6	6.11	6.07	5.85	5.3
12	5.69	5.9	6.11	6.21	6.37	6.36	6.19	5.9
14	5.74	5.96	6.2	6.36	6.52	6.63	6.48	6.21
16	5.77	5.98	6.25	6.49	6.64	6.86	6.78	6.48
20	5.76	5.97	6.28	6.62	6.85	7.13	7.41	7.09

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	2.91	149°	3.06
8	41.2°	3.42	153°	3.85
10	42.8°	3.68	151°	4.59
12	42.8°	3.8	167.5°	5.3
14	42.8°	3.85	180°	5.83
16	43.3°	3.85	180°	6.15
20	44.2°	3.81	180°	6.69

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°	4.41	5.16	5.56	5.69	5.74	5.77	5.76
60°	4.65	5.43	5.77	5.90	5.96	5.98	5.97
75°	4.86	5.62	5.95	6.11	6.20	6.25	6.28
90°	4.83	5.64	6.00	6.21	6.36	6.49	6.62
110°	4.77	5.70	6.11	6.37	6.52	6.64	6.85
120°	4.62	5.60	6.07	6.36	6.63	6.86	7.13
135°	4.13	5.08	5.85	6.19	6.48	6.78	7.41
150°	3.53	4.44	5.30	5.90	6.21	6.48	7.09