X-xs — ORC Rating | RegattaPages

GPH

702.4

OSN

683.2

LOA

7.85 m

Displacement

1942 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5856

Medium

0.7891

High

0.89

Triple Offshore

Low

0.7536

Medium

0.9606

High

1.0675

Boat Specifications

Dimensions

Length overall: 7.85 m
Beam: 2.86 m
Draft: 1.4 m
Displacement: 1942 kg
Crew weight: 350 kg
Wetted surface: 14.76 m²

Sails

Mainsail: 21.44 m²
Genoa: 18.73 m²
Spinnaker: 45.97 m²
Asymmetric spinnaker: 0 m²

Design

Type: X79
Builder: X Yachts
Designer: N. Jeppesen
Year built: 1969

Velocity Prediction

Polar CSV

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

6,42.4,4.211494,52,4.71,60,5,75,5.2,90,5.14,110,5.14,120,4.98,135,4.48,148,3.855913,150,3.78
8,41.6,4.974605,52,5.56,60,5.77,75,5.92,90,5.99,110,6.04,120,5.92,135,5.46,150,4.76,152,4.666189
10,40.1,5.49076,52,6.01,60,6.15,75,6.26,90,6.4,110,6.48,120,6.4,135,6.14,150,5.61,153,5.476952
12,39,5.67461,52,6.21,60,6.36,75,6.53,90,6.65,110,6.91,120,6.83,135,6.54,150,6.19,170,5.66608
14,38.6,5.732415,52,6.28,60,6.47,75,6.76,90,6.88,110,7.3,120,7.27,135,6.96,150,6.55,180,6.11
16,38.6,5.758007,52,6.31,60,6.52,75,6.9,90,7.16,110,7.58,120,7.72,135,7.38,150,6.94,180,6.46
20,39.8,5.792133,52,6.31,60,6.54,75,7.01,90,7.51,110,7.99,120,8.5,135,8.44,150,7.76,180,7.19

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.71	5	5.2	5.14	5.14	4.98	4.48	3.78
8	5.56	5.77	5.92	5.99	6.04	5.92	5.46	4.76
10	6.01	6.15	6.26	6.4	6.48	6.4	6.14	5.61
12	6.21	6.36	6.53	6.65	6.91	6.83	6.54	6.19
14	6.28	6.47	6.76	6.88	7.3	7.27	6.96	6.55
16	6.31	6.52	6.9	7.16	7.58	7.72	7.38	6.94
20	6.31	6.54	7.01	7.51	7.99	8.5	8.44	7.76

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.4°	3.11	148°	3.27
8	41.6°	3.72	152°	4.12
10	40.1°	4.2	153°	4.88
12	39°	4.41	170°	5.58
14	38.6°	4.48	180°	6.11
16	38.6°	4.5	180°	6.46
20	39.8°	4.45	180°	7.19

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