DIRTY HARRY: ORC Rating

GPH

651.8

OSN

633.2

LOA

8.989 m

Displacement

2477 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6393

Medium

0.8518

High

0.9623

Triple Offshore

Low

0.8178

Medium

1.0316

High

1.1485

Boat Specifications

Dimensions

Length overall: 8.989 m
Beam: 3.39 m
Draft: 1.74 m
Displacement: 2477 kg
Crew weight: 544 kg
Wetted surface: 18.04 m²

Sails

Mainsail: 23.89 m²
Genoa: 35.17 m²
Spinnaker: 67.16 m²
Asymmetric spinnaker: 0 m²

Design

Type: J-29
Builder: TPI
Designer: Rod Johnstone
Year built: 1982
Stability index: 102.2

Performance data

Polar CSV

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

6,42.6,4.700467,52,5.24,60,5.53,75,5.74,90,5.66,110,5.36,120,5.22,135,4.74,146.2,4.211872,150,4.04
8,41.4,5.532514,52,6.1,60,6.28,75,6.4,90,6.39,110,6.35,120,6.24,135,5.82,150,5.08,150.2,5.070495
10,38.8,5.94094,52,6.49,60,6.62,75,6.74,90,6.76,110,6.84,120,6.76,135,6.49,150,5.97,153.2,5.814567
12,37.5,6.088082,52,6.67,60,6.85,75,7.04,90,7.09,110,7.3,120,7.23,135,6.92,150,6.54,161.3,6.165474
14,36.9,6.152425,52,6.76,60,6.98,75,7.29,90,7.42,110,7.7,120,7.7,135,7.38,150,6.94,175.7,6.387981
16,36.4,6.174728,52,6.82,60,7.05,75,7.44,90,7.71,110,8.02,120,8.17,135,7.85,150,7.37,177.2,6.76808
20,36.9,6.202445,52,6.84,60,7.11,75,7.57,90,8.06,110,8.46,120,9.02,135,9.07,150,8.28,177.2,7.559024

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.24	5.53	5.74	5.66	5.36	5.22	4.74	4.04
8	6.1	6.28	6.4	6.39	6.35	6.24	5.82	5.08
10	6.49	6.62	6.74	6.76	6.84	6.76	6.49	5.97
12	6.67	6.85	7.04	7.09	7.3	7.23	6.92	6.54
14	6.76	6.98	7.29	7.42	7.7	7.7	7.38	6.94
16	6.82	7.05	7.44	7.71	8.02	8.17	7.85	7.37
20	6.84	7.11	7.57	8.06	8.46	9.02	9.07	8.28

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.46	146.2°	3.5
8	41.4°	4.15	150.2°	4.4
10	38.8°	4.63	153.2°	5.19
12	37.5°	4.83	161.3°	5.84
14	36.9°	4.92	175.7°	6.37
16	36.4°	4.97	177.2°	6.76
20	36.9°	4.96	177.2°	7.55

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°	5.24	6.10	6.49	6.67	6.76	6.82	6.84
60°	5.53	6.28	6.62	6.85	6.98	7.05	7.11
75°	5.74	6.40	6.74	7.04	7.29	7.44	7.57
90°	5.66	6.39	6.76	7.09	7.42	7.71	8.06
110°	5.36	6.35	6.84	7.30	7.70	8.02	8.46
120°	5.22	6.24	6.76	7.23	7.70	8.17	9.02
135°	4.74	5.82	6.49	6.92	7.38	7.85	9.07
150°	4.04	5.08	5.97	6.54	6.94	7.37	8.28