Angry Bird: ORC Rating

GPH

639.6

OSN

619.9

LOA

9.993 m

Displacement

4246 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6306

Medium

0.8645

High

1.0009

Triple Offshore

Low

0.8139

Medium

1.0612

High

1.1969

Boat Specifications

Dimensions

Length overall: 9.993 m
Beam: 3.37 m
Draft: 1.98 m
Displacement: 4246 kg
Crew weight: 656 kg
Wetted surface: 23.79 m²

Sails

Mainsail: 32.89 m²
Genoa: 26.17 m²
Spinnaker: 74.29 m²
Asymmetric spinnaker: 0 m²

Design

Type: Stern 33
Builder: Parnu Yachts
Designer: Bosgraaf
Year built: 2003

Performance data

Polar CSV

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

6,42.8,4.483939,52,5.05,60,5.35,75,5.58,90,5.51,110,5.53,120,5.37,135,4.87,145,4.358165,150,4.12
8,41.2,5.302925,52,5.99,60,6.3,75,6.53,90,6.56,110,6.67,120,6.52,135,5.99,150,5.196152
10,40.9,6.006455,52,6.65,60,6.85,75,7,90,7.12,110,7.22,120,7.15,135,6.82,150,6.13,151.5,6.042213
12,39,6.330857,52,6.97,60,7.13,75,7.29,90,7.38,110,7.63,120,7.56,135,7.28,150,6.85,157.5,6.526825
14,38.2,6.438831,52,7.1,60,7.29,75,7.53,90,7.6,110,8.04,120,8.04,135,7.68,150,7.27,180,6.65
16,37.9,6.488535,52,7.16,60,7.37,75,7.72,90,7.9,110,8.34,120,8.52,135,8.16,150,7.64,180,7.12
20,37.9,6.564573,52,7.21,60,7.41,75,7.89,90,8.41,110,8.81,120,9.29,135,9.3,150,8.55,180,7.86

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.05	5.35	5.58	5.51	5.53	5.37	4.87	4.12
8	5.99	6.3	6.53	6.56	6.67	6.52	5.99	5.19
10	6.65	6.85	7	7.12	7.22	7.15	6.82	6.13
12	6.97	7.13	7.29	7.38	7.63	7.56	7.28	6.85
14	7.1	7.29	7.53	7.6	8.04	8.04	7.68	7.27
16	7.16	7.37	7.72	7.9	8.34	8.52	8.16	7.64
20	7.21	7.41	7.89	8.41	8.81	9.29	9.3	8.55

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.29	145°	3.57
8	41.2°	3.99	150°	4.5
10	40.9°	4.54	151.5°	5.31
12	39°	4.92	157.5°	6.03
14	38.2°	5.06	180°	6.65
16	37.9°	5.12	180°	7.12
20	37.9°	5.18	180°	7.86

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°	5.05	5.99	6.65	6.97	7.10	7.16	7.21
60°	5.35	6.30	6.85	7.13	7.29	7.37	7.41
75°	5.58	6.53	7.00	7.29	7.53	7.72	7.89
90°	5.51	6.56	7.12	7.38	7.60	7.90	8.41
110°	5.53	6.67	7.22	7.63	8.04	8.34	8.81
120°	5.37	6.52	7.15	7.56	8.04	8.52	9.29
135°	4.87	5.99	6.82	7.28	7.68	8.16	9.30
150°	4.12	5.19	6.13	6.85	7.27	7.64	8.55