STORTEMELK: ORC Rating

GPH

578

OSN

560.6

LOA

12.903 m

Displacement

8579 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.707

Medium

0.9554

High

1.0984

Triple Offshore

Low

0.9088

Medium

1.1716

High

1.3062

Boat Specifications

Dimensions

Length overall: 12.903 m
Beam: 3.95 m
Draft: 2.51 m
Displacement: 8579 kg
Crew weight: 894 kg
Wetted surface: 35.37 m²

Sails

Mainsail: 53.04 m²
Genoa: 39.81 m²
Spinnaker: 136.27 m²
Asymmetric spinnaker: 128.41 m²

Design

Type: X-43 x 2.50
Builder: X-Yachts
Designer: N. Jeppesen
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.

6,42.6,5.080852,52,5.68,60,5.97,75,6.18,90,6.11,110,6.17,120,5.99,135,5.38,141.7,5.007796,150,4.54
8,40.5,5.996797,52,6.71,60,6.97,75,7.15,90,7.22,110,7.36,120,7.23,135,6.66,146,5.982841,150,5.73
10,39.1,6.584658,52,7.35,60,7.56,75,7.71,90,7.79,110,8,120,7.94,135,7.57,150,6.76,150.7,6.71965
12,38.1,6.862066,52,7.65,60,7.86,75,8.04,90,8.07,110,8.4,120,8.4,135,8.11,150,7.56,155.8,7.257816
14,37.5,6.983017,52,7.79,60,8,75,8.26,90,8.36,110,8.71,120,8.82,135,8.57,150,8.08,163.3,7.558812
16,37.3,7.077546,52,7.87,60,8.08,75,8.4,90,8.61,110,8.93,120,9.2,135,9.02,150,8.5,175.8,7.810977
20,37.1,7.171659,52,7.96,60,8.19,75,8.58,90,8.96,110,9.31,120,9.77,135,10.04,150,9.4,177.7,8.62695
24,38,7.195333,52,7.98,60,8.2,75,8.66,90,9.16,110,9.5,120,10.27,135,11.42,150,10.58,176.8,9.474773

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.68	5.97	6.18	6.11	6.17	5.99	5.38	4.54
8	6.71	6.97	7.15	7.22	7.36	7.23	6.66	5.73
10	7.35	7.56	7.71	7.79	8	7.94	7.57	6.76
12	7.65	7.86	8.04	8.07	8.4	8.4	8.11	7.56
14	7.79	8	8.26	8.36	8.71	8.82	8.57	8.08
16	7.87	8.08	8.4	8.61	8.93	9.2	9.02	8.5
20	7.96	8.19	8.58	8.96	9.31	9.77	10.04	9.4
24	7.98	8.2	8.66	9.16	9.5	10.27	11.42	10.58

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.74	141.7°	3.93
8	40.5°	4.56	146°	4.96
10	39.1°	5.11	150.7°	5.86
12	38.1°	5.4	155.8°	6.62
14	37.5°	5.54	163.3°	7.24
16	37.3°	5.63	175.8°	7.79
20	37.1°	5.72	177.7°	8.62
24	38°	5.67	176.8°	9.46

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 kt24 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)	Boat speed in 24 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	5.68	6.71	7.35	7.65	7.79	7.87	7.96	7.98
60°	5.97	6.97	7.56	7.86	8.00	8.08	8.19	8.20
75°	6.18	7.15	7.71	8.04	8.26	8.40	8.58	8.66
90°	6.11	7.22	7.79	8.07	8.36	8.61	8.96	9.16
110°	6.17	7.36	8.00	8.40	8.71	8.93	9.31	9.50
120°	5.99	7.23	7.94	8.40	8.82	9.20	9.77	10.27
135°	5.38	6.66	7.57	8.11	8.57	9.02	10.04	11.42
150°	4.54	5.73	6.76	7.56	8.08	8.50	9.40	10.58