Excalibur: ORC Rating

GPH

688.1

OSN

670.2

LOA

7.927 m

Displacement

1595 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6776

Medium

0.9025

High

1.0096

Triple Offshore

Low

0.8702

Medium

1.1004

High

1.223

Boat Specifications

Dimensions

Length overall: 7.927 m
Beam: 2.84 m
Draft: 1.37 m
Displacement: 1595 kg
Crew weight: 362 kg
Wetted surface: 13.76 m²

Sails

Mainsail: 21.39 m²
Genoa: 18.83 m²
Spinnaker: 49.65 m²
Asymmetric spinnaker: 0 m²

Design

Type: X-79 OD
Builder: X-Yachts
Designer: JEPPESEN
Year built: 1979

Performance data

Polar CSV

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

6,42.4,4.360453,52,4.88,60,5.13,75,5.33,90,5.26,110,5.28,120,5.11,135,4.6,147.2,3.97351,150,3.86
8,41.8,5.1779,52,5.72,60,5.89,75,6.01,90,6.08,110,6.13,120,6.03,135,5.59,150,4.86,150.8,4.811426
10,39.5,5.585618,52,6.1,60,6.24,75,6.36,90,6.48,110,6.63,120,6.53,135,6.25,150,5.72,152.9,5.594168
12,38.6,5.694029,52,6.25,60,6.45,75,6.68,90,6.73,110,7.11,120,7.03,135,6.7,150,6.29,168.8,5.769887
14,38.5,5.750004,52,6.31,60,6.54,75,6.9,90,7.07,110,7.48,120,7.55,135,7.18,150,6.71,180,6.18
16,38.7,5.766049,52,6.34,60,6.58,75,7.01,90,7.35,110,7.73,120,8.08,135,7.68,150,7.15,180,6.58
20,39.9,5.800576,52,6.36,60,6.61,75,7.08,90,7.62,110,8.25,120,8.96,135,9.43,150,8.24,179.9,7.400011

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.88	5.13	5.33	5.26	5.28	5.11	4.6	3.86
8	5.72	5.89	6.01	6.08	6.13	6.03	5.59	4.86
10	6.1	6.24	6.36	6.48	6.63	6.53	6.25	5.72
12	6.25	6.45	6.68	6.73	7.11	7.03	6.7	6.29
14	6.31	6.54	6.9	7.07	7.48	7.55	7.18	6.71
16	6.34	6.58	7.01	7.35	7.73	8.08	7.68	7.15
20	6.36	6.61	7.08	7.62	8.25	8.96	9.43	8.24

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.22	147.2°	3.34
8	41.8°	3.86	150.8°	4.2
10	39.5°	4.31	152.9°	4.98
12	38.6°	4.45	168.8°	5.66
14	38.5°	4.5	180°	6.18
16	38.7°	4.5	180°	6.58
20	39.9°	4.45	179.9°	7.4

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°	4.88	5.72	6.10	6.25	6.31	6.34	6.36
60°	5.13	5.89	6.24	6.45	6.54	6.58	6.61
75°	5.33	6.01	6.36	6.68	6.90	7.01	7.08
90°	5.26	6.08	6.48	6.73	7.07	7.35	7.62
110°	5.28	6.13	6.63	7.11	7.48	7.73	8.25
120°	5.11	6.03	6.53	7.03	7.55	8.08	8.96
135°	4.60	5.59	6.25	6.70	7.18	7.68	9.43
150°	3.86	4.86	5.72	6.29	6.71	7.15	8.24