BLUE DUDE: ORC Rating

GPH

602.2

OSN

586.9

LOA

8.4 m

Displacement

1640 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7107

Medium

0.9016

High

1.0447

Triple Offshore

Low

0.8991

Medium

1.1037

High

1.2601

Boat Specifications

Dimensions

Length overall: 8.4 m
Beam: 2.92 m
Draft: 2.48 m
Displacement: 1640 kg
Crew weight: 450 kg
Wetted surface: 15.89 m²

Sails

Mainsail: 33.97 m²
Genoa: 15.94 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 89.66 m²

Design

Type: YOUNG Rocket 8.4
Builder: FAIR Tom
Designer: YOUNG Jim
Year built: 1986
Stability index: 128.8

Performance data

Polar CSV

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

6,40.8,5.046268,52,5.66,60,5.89,75,6.03,90,6.03,110,6.15,120,6.04,135,5.41,143.4,4.932628,150,4.57
8,38.4,5.754801,52,6.39,60,6.54,75,6.66,90,6.65,110,6.94,120,6.92,135,6.55,147.8,5.849728,150,5.72
10,36.6,5.991399,52,6.68,60,6.88,75,7.1,90,7.14,110,7.48,120,7.62,135,7.34,150,6.56,150.1,6.563642
12,36.3,6.11717,52,6.83,60,7.07,75,7.44,90,7.62,110,7.89,120,8.24,135,8.14,149.2,7.346094,150,7.29
14,36,6.18034,52,6.94,60,7.22,75,7.66,90,8.04,110,8.28,120,8.75,135,9.08,146.6,8.300914,150,8
16,36,6.229783,52,7.02,60,7.33,75,7.86,90,8.39,110,8.67,120,9.28,135,10.13,144.8,9.472004,150,8.94
20,36.4,6.286544,52,7.12,60,7.47,75,8.13,90,8.93,110,9.67,120,10.35,135,12.22,145.3,12.662015,150,12.02

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.66	5.89	6.03	6.03	6.15	6.04	5.41	4.57
8	6.39	6.54	6.66	6.65	6.94	6.92	6.55	5.72
10	6.68	6.88	7.1	7.14	7.48	7.62	7.34	6.56
12	6.83	7.07	7.44	7.62	7.89	8.24	8.14	7.29
14	6.94	7.22	7.66	8.04	8.28	8.75	9.08	8
16	7.02	7.33	7.86	8.39	8.67	9.28	10.13	8.94
20	7.12	7.47	8.13	8.93	9.67	10.35	12.22	12.02

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	40.8°	3.82	143.4°	3.96
8	38.4°	4.51	147.8°	4.95
10	36.6°	4.81	150.1°	5.69
12	36.3°	4.93	149.2°	6.31
14	36°	5	146.6°	6.93
16	36°	5.04	144.8°	7.74
20	36.4°	5.06	145.3°	10.41

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°	5.66	6.39	6.68	6.83	6.94	7.02	7.12
60°	5.89	6.54	6.88	7.07	7.22	7.33	7.47
75°	6.03	6.66	7.10	7.44	7.66	7.86	8.13
90°	6.03	6.65	7.14	7.62	8.04	8.39	8.93
110°	6.15	6.94	7.48	7.89	8.28	8.67	9.67
120°	6.04	6.92	7.62	8.24	8.75	9.28	10.35
135°	5.41	6.55	7.34	8.14	9.08	10.13	12.22
150°	4.57	5.72	6.56	7.29	8.00	8.94	12.02