STORTEMELK: ORC Rating

GPH

579.6

OSN

562.3

LOA

12.903 m

Displacement

8579 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6975

Medium

0.9527

High

1.1012

Triple Offshore

Low

0.9004

Medium

1.1711

High

1.3107

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: 35.22 m²

Sails

Mainsail: 52.37 m²
Genoa: 41.52 m²
Spinnaker: 138.75 m²
Asymmetric spinnaker: 128.41 m²

Design

Type: X-43 x 2.50
Builder: X-Yachts
Designer: N. Jeppesen
Year built: 2003
Stability index: 116.8

Performance data

Polar CSV

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

6,43,4.977072,52,5.55,60,5.87,75,6.12,90,6.1,110,6.15,120,5.98,135,5.39,142.4,4.98555,150,4.57
8,41.2,5.874418,52,6.61,60,6.93,75,7.17,90,7.31,110,7.41,120,7.26,135,6.66,147.9,5.855119,150,5.73
10,40.2,6.585528,52,7.35,60,7.57,75,7.73,90,7.88,110,8.03,120,7.95,135,7.61,149.8,6.791821,150,6.78
12,39,6.935634,52,7.69,60,7.88,75,8.05,90,8.09,110,8.42,120,8.39,135,8.11,150,7.6,155.6,7.313187
14,38.2,7.04963,52,7.81,60,8.02,75,8.27,90,8.36,110,8.74,120,8.85,135,8.54,150,8.08,164,7.57338
16,37.8,7.099873,52,7.88,60,8.1,75,8.43,90,8.63,110,8.98,120,9.29,135,9.03,150,8.49,176.3,7.836334
20,37.6,7.295312,52,7.98,60,8.17,75,8.58,90,9.06,110,9.42,120,9.9,135,10.14,150,9.44,177.2,8.620291

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.55	5.87	6.12	6.1	6.15	5.98	5.39	4.57
8	6.61	6.93	7.17	7.31	7.41	7.26	6.66	5.73
10	7.35	7.57	7.73	7.88	8.03	7.95	7.61	6.78
12	7.69	7.88	8.05	8.09	8.42	8.39	8.11	7.6
14	7.81	8.02	8.27	8.36	8.74	8.85	8.54	8.08
16	7.88	8.1	8.43	8.63	8.98	9.29	9.03	8.49
20	7.98	8.17	8.58	9.06	9.42	9.9	10.14	9.44

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.64	142.4°	3.95
8	41.2°	4.42	147.9°	4.96
10	40.2°	5.03	149.8°	5.87
12	39°	5.39	155.6°	6.66
14	38.2°	5.54	164°	7.28
16	37.8°	5.61	176.3°	7.82
20	37.6°	5.78	177.2°	8.61

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°	5.55	6.61	7.35	7.69	7.81	7.88	7.98
60°	5.87	6.93	7.57	7.88	8.02	8.10	8.17
75°	6.12	7.17	7.73	8.05	8.27	8.43	8.58
90°	6.10	7.31	7.88	8.09	8.36	8.63	9.06
110°	6.15	7.41	8.03	8.42	8.74	8.98	9.42
120°	5.98	7.26	7.95	8.39	8.85	9.29	9.90
135°	5.39	6.66	7.61	8.11	8.54	9.03	10.14
150°	4.57	5.73	6.78	7.60	8.08	8.49	9.44