ESSENTIALLY CHICKEN: ORC Rating

GPH

589.6

OSN

574.3

LOA

8.5 m

Displacement

1214 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7098

Medium

0.9122

High

1.0687

Triple Offshore

Low

0.907

Medium

1.1332

High

1.3063

Boat Specifications

Dimensions

Length overall: 8.5 m
Beam: 2.19 m
Draft: 2 m
Displacement: 1214 kg
Crew weight: 350 kg
Wetted surface: 14.59 m²

Sails

Mainsail: 26.35 m²
Genoa: 17.44 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 70.06 m²

Design

Type: Esse 850
Builder: Proteus Yachts
Designer: Felci
Year built: 2004
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.

4,42.6,3.68158,52,4.29,60,4.59,75,4.8,90,4.84,110,4.69,120,4.55,135,3.96,142.1,3.510399,150,3.2
6,42.6,5.094437,52,5.68,60,5.96,75,6.13,90,6.25,110,6.17,120,6.04,135,5.46,142.1,5.03115,150,4.58
8,39.6,5.86622,52,6.53,60,6.73,75,6.88,90,7.02,110,7.13,120,7.09,135,6.63,146.7,5.994204,150,5.78
10,38,6.103978,52,6.81,60,7.06,75,7.41,90,7.47,110,7.85,120,7.98,135,7.5,150,6.68,152.1,6.562826
12,37.4,6.218415,52,6.96,60,7.26,75,7.71,90,8.07,110,8.49,120,8.7,135,8.53,150,7.45,150.4,7.429601
14,37.2,6.289783,52,7.08,60,7.4,75,7.94,90,8.48,110,9.01,120,9.5,135,9.76,145.9,8.743324,150,8.36
16,37.2,6.352555,52,7.17,60,7.51,75,8.13,90,8.82,110,9.46,120,10.19,135,10.98,143.9,10.185771,150,9.5
20,37.7,6.407797,52,7.25,60,7.64,75,8.37,90,9.35,110,10.57,120,11.36,135,12.91,145.4,13.424264,150,12.76
24,39.2,6.387554,52,7.18,60,7.6,75,8.49,90,9.73,110,11.45,120,12.36,135,14.75,149.8,15.874581,150,15.84

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
4	4.29	4.59	4.8	4.84	4.69	4.55	3.96	3.2
6	5.68	5.96	6.13	6.25	6.17	6.04	5.46	4.58
8	6.53	6.73	6.88	7.02	7.13	7.09	6.63	5.78
10	6.81	7.06	7.41	7.47	7.85	7.98	7.5	6.68
12	6.96	7.26	7.71	8.07	8.49	8.7	8.53	7.45
14	7.08	7.4	7.94	8.48	9.01	9.5	9.76	8.36
16	7.17	7.51	8.13	8.82	9.46	10.19	10.98	9.5
20	7.25	7.64	8.37	9.35	10.57	11.36	12.91	12.76
24	7.18	7.6	8.49	9.73	11.45	12.36	14.75	15.84

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
4	42.6°	2.71	142.1°	2.77
6	42.6°	3.75	142.1°	3.97
8	39.6°	4.52	146.7°	5.01
10	38°	4.81	152.1°	5.8
12	37.4°	4.94	150.4°	6.46
14	37.2°	5.01	145.9°	7.24
16	37.2°	5.06	143.9°	8.23
20	37.7°	5.07	145.4°	11.05
24	39.2°	4.95	149.8°	13.72

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°	4.29	5.68	6.53	6.81	6.96	7.08	7.17	7.25	7.18
60°	4.59	5.96	6.73	7.06	7.26	7.40	7.51	7.64	7.60
75°	4.80	6.13	6.88	7.41	7.71	7.94	8.13	8.37	8.49
90°	4.84	6.25	7.02	7.47	8.07	8.48	8.82	9.35	9.73
110°	4.69	6.17	7.13	7.85	8.49	9.01	9.46	10.57	11.45
120°	4.55	6.04	7.09	7.98	8.70	9.50	10.19	11.36	12.36
135°	3.96	5.46	6.63	7.50	8.53	9.76	10.98	12.91	14.75
150°	3.20	4.58	5.78	6.68	7.45	8.36	9.50	12.76	15.84