Thunder: ORC Rating

GPH

638.3

OSN

621.6

LOA

11.031 m

Displacement

5375 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6513

Medium

0.8605

High

0.9746

Triple Offshore

Low

0.8365

Medium

1.0547

High

1.1621

Boat Specifications

Dimensions

Length overall: 11.031 m
Beam: 3.59 m
Draft: 2.03 m
Displacement: 5375 kg
Crew weight: 559 kg
Wetted surface: 25.17 m²

Sails

Mainsail: 42.72 m²
Genoa: 24.11 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 80.36 m²

Design

Type: X372 (MOD)
Builder: X YACHTS
Designer: NIELS JEPPESEN
Year built: 1987
Stability index: 115.4

Performance data

Polar CSV

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

6,42.6,4.741222,52,5.26,60,5.52,75,5.69,90,5.74,110,5.71,120,5.51,135,4.92,143.3,4.477562,150,4.15
8,40.2,5.49885,52,6.14,60,6.36,75,6.5,90,6.65,110,6.7,120,6.55,135,6.05,147.8,5.365205,150,5.24
10,38.8,5.979434,52,6.63,60,6.8,75,6.93,90,7.09,110,7.19,120,7.11,135,6.8,148.7,6.21446,150,6.13
12,37.8,6.201315,52,6.87,60,7.03,75,7.19,90,7.34,110,7.52,120,7.48,135,7.24,150,6.731904
14,37.2,6.289783,52,6.99,60,7.17,75,7.37,90,7.48,110,7.81,120,7.81,135,7.59,150,7.09,172.7,6.351482
16,37.2,6.377664,52,7.07,60,7.25,75,7.5,90,7.64,110,8.08,120,8.15,135,7.94,150,7.37,176.3,6.814203
20,37.6,6.474905,52,7.14,60,7.34,75,7.66,90,7.95,110,8.47,120,8.9,135,8.77,150,7.92,177.7,7.445999

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.26	5.52	5.69	5.74	5.71	5.51	4.92	4.15
8	6.14	6.36	6.5	6.65	6.7	6.55	6.05	5.24
10	6.63	6.8	6.93	7.09	7.19	7.11	6.8	6.13
12	6.87	7.03	7.19	7.34	7.52	7.48	7.24	6.73
14	6.99	7.17	7.37	7.48	7.81	7.81	7.59	7.09
16	7.07	7.25	7.5	7.64	8.08	8.15	7.94	7.37
20	7.14	7.34	7.66	7.95	8.47	8.9	8.77	7.92

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.49	143.3°	3.59
8	40.2°	4.2	147.8°	4.54
10	38.8°	4.66	148.7°	5.31
12	37.8°	4.9	150°	5.83
14	37.2°	5.01	172.7°	6.3
16	37.2°	5.08	176.3°	6.8
20	37.6°	5.13	177.7°	7.44

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°	5.26	6.14	6.63	6.87	6.99	7.07	7.14
60°	5.52	6.36	6.80	7.03	7.17	7.25	7.34
75°	5.69	6.50	6.93	7.19	7.37	7.50	7.66
90°	5.74	6.65	7.09	7.34	7.48	7.64	7.95
110°	5.71	6.70	7.19	7.52	7.81	8.08	8.47
120°	5.51	6.55	7.11	7.48	7.81	8.15	8.90
135°	4.92	6.05	6.80	7.24	7.59	7.94	8.77
150°	4.15	5.24	6.13	6.73	7.09	7.37	7.92