Sundowner: ORC Rating

GPH

747.4

OSN

724.5

LOA

7.65 m

Displacement

1700 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5566

Medium

0.7468

High

0.8446

Triple Offshore

Low

0.7101

Medium

0.9025

High

0.9979

Boat Specifications

Dimensions

Length overall: 7.65 m
Beam: 2.76 m
Draft: 1.54 m
Displacement: 1700 kg
Crew weight: 334 kg
Wetted surface: 12.59 m²

Sails

Mainsail: 18.07 m²
Genoa: 15.5 m²
Spinnaker: 36.84 m²
Asymmetric spinnaker: 32.51 m²

Design

Type: Conrad 25RT
Builder: Gdansk, Poland
Designer: Peterson
Year built: 1976
Stability index: 103.2

Performance data

Polar CSV

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

6,42,4.050355,52,4.51,60,4.71,75,4.82,90,4.77,110,4.78,120,4.63,135,4.13,147.8,3.604378,150,3.52
8,40.6,4.728218,52,5.25,60,5.41,75,5.5,90,5.58,110,5.61,120,5.49,135,5.04,150,4.46,152.9,4.347275
10,38.7,5.112563,52,5.63,60,5.76,75,5.86,90,6,110,6.06,120,5.98,135,5.72,150,5.24,155.9,5.017341
12,37.5,5.293984,52,5.83,60,5.96,75,6.1,90,6.28,110,6.39,120,6.32,135,6.1,150,5.79,168.2,5.34291
14,37.5,5.394822,52,5.94,60,6.09,75,6.28,90,6.47,110,6.68,120,6.65,135,6.43,150,6.14,177.2,5.726837
16,37.5,5.445241,52,5.99,60,6.16,75,6.41,90,6.58,110,6.93,120,6.96,135,6.75,150,6.45,179,6.060923
20,38.2,5.471734,52,6.03,60,6.23,75,6.55,90,6.84,110,7.44,120,7.62,135,7.49,150,7.07,179,6.641011

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.51	4.71	4.82	4.77	4.78	4.63	4.13	3.52
8	5.25	5.41	5.5	5.58	5.61	5.49	5.04	4.46
10	5.63	5.76	5.86	6	6.06	5.98	5.72	5.24
12	5.83	5.96	6.1	6.28	6.39	6.32	6.1	5.79
14	5.94	6.09	6.28	6.47	6.68	6.65	6.43	6.14
16	5.99	6.16	6.41	6.58	6.93	6.96	6.75	6.45
20	6.03	6.23	6.55	6.84	7.44	7.62	7.49	7.07

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.01	147.8°	3.05
8	40.6°	3.59	152.9°	3.87
10	38.7°	3.99	155.9°	4.58
12	37.5°	4.2	168.2°	5.23
14	37.5°	4.28	177.2°	5.72
16	37.5°	4.32	179°	6.06
20	38.2°	4.3	179°	6.64

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°	4.51	5.25	5.63	5.83	5.94	5.99	6.03
60°	4.71	5.41	5.76	5.96	6.09	6.16	6.23
75°	4.82	5.50	5.86	6.10	6.28	6.41	6.55
90°	4.77	5.58	6.00	6.28	6.47	6.58	6.84
110°	4.78	5.61	6.06	6.39	6.68	6.93	7.44
120°	4.63	5.49	5.98	6.32	6.65	6.96	7.62
135°	4.13	5.04	5.72	6.10	6.43	6.75	7.49
150°	3.52	4.46	5.24	5.79	6.14	6.45	7.07