Chen — ORC Rating | RegattaPages

GPH

729

OSN

703.9

LOA

9.33 m

Displacement

4104 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5559

Medium

0.7617

High

0.8843

Triple Offshore

Low

0.7116

Medium

0.9328

High

1.0479

Boat Specifications

Dimensions

Length overall: 9.33 m
Beam: 3.15 m
Draft: 1.72 m
Displacement: 4104 kg
Crew weight: 476 kg
Wetted surface: 21.51 m²

Sails

Mainsail: 19.61 m²
Genoa: 31.51 m²
Spinnaker: 66.68 m²
Asymmetric spinnaker: 0 m²

Design

Type: Miura
Builder: Halstead
Designer: Berckermeyer
Year built: 1970
Stability index: 108.6

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.

6,43.5,4.025508,52,4.46,60,4.68,75,4.81,90,4.71,110,4.78,120,4.65,135,4.2,147.5,3.687493,150,3.59
8,41.8,4.73523,52,5.27,60,5.48,75,5.63,90,5.61,110,5.77,120,5.65,135,5.2,150,4.58,151.1,4.534735
10,40.5,5.220895,52,5.8,60,5.98,75,6.12,90,6.21,110,6.36,120,6.3,135,5.99,150,5.43,153.2,5.288007
12,39.4,5.538778,52,6.12,60,6.28,75,6.42,90,6.53,110,6.72,120,6.69,135,6.47,150,6.09,159.5,5.733062
14,39.4,5.745836,52,6.31,60,6.46,75,6.63,90,6.68,110,7,120,7,135,6.82,150,6.5,173,5.964458
16,38.8,5.786963,52,6.39,60,6.57,75,6.79,90,6.88,110,7.22,120,7.29,135,7.14,150,6.82,177.2,6.367602
20,38.8,5.838289,52,6.45,60,6.65,75,6.96,90,7.18,110,7.51,120,7.77,135,7.77,150,7.41,179,6.96106

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.46	4.68	4.81	4.71	4.78	4.65	4.2	3.59
8	5.27	5.48	5.63	5.61	5.77	5.65	5.2	4.58
10	5.8	5.98	6.12	6.21	6.36	6.3	5.99	5.43
12	6.12	6.28	6.42	6.53	6.72	6.69	6.47	6.09
14	6.31	6.46	6.63	6.68	7	7	6.82	6.5
16	6.39	6.57	6.79	6.88	7.22	7.29	7.14	6.82
20	6.45	6.65	6.96	7.18	7.51	7.77	7.77	7.41

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	2.92	147.5°	3.11
8	41.8°	3.53	151.1°	3.97
10	40.5°	3.97	153.2°	4.72
12	39.4°	4.28	159.5°	5.37
14	39.4°	4.44	173°	5.92
16	38.8°	4.51	177.2°	6.36
20	38.8°	4.55	179°	6.96

Loading polar chart…