CHAPU CHAPU — ORC Rating

GPH

646.8

OSN

629.3

LOA

7.5 m

Displacement

1110 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6435

Medium

0.8366

High

0.9661

Triple Offshore

Low

0.8241

Medium

1.0361

High

1.1836

Boat Specifications

Dimensions

Length overall: 7.5 m
Beam: 2.46 m
Draft: 1.71 m
Displacement: 1110 kg
Crew weight: 270 kg
Wetted surface: 12.79 m²

Sails

Mainsail: 23.48 m²
Genoa: 13.24 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 52.29 m²

Design

Type: BULL 7000
Builder: GREG YOUNG
Designer: GREG YOUNG
Year built: 1994
Stability index: 106.3

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.

6,43.2,4.499508,52,5.02,60,5.32,75,5.58,90,5.6,110,5.71,120,5.6,135,5.1,140.8,4.813248,150,4.31
8,41.8,5.392528,52,5.96,60,6.14,75,6.27,90,6.38,110,6.57,120,6.5,135,6.2,147.3,5.537659,150,5.39
10,39.6,5.710479,52,6.29,60,6.5,75,6.75,90,6.77,110,7.23,120,7.29,135,6.85,150,6.21,154.6,5.988917
12,38.8,5.786963,52,6.4,60,6.66,75,7.12,90,7.35,110,7.66,120,8.01,135,7.63,150,6.85,161,6.345724
14,38.8,5.838289,52,6.45,60,6.75,75,7.3,90,7.82,110,8.08,120,8.56,135,8.66,150,7.55,156.8,7.148022
16,38.4,5.907922,52,6.55,60,6.84,75,7.4,90,8.08,110,8.47,120,9.09,135,9.83,148.7,8.543419,150,8.43
20,39.3,5.970225,52,6.64,60,7.01,75,7.71,90,8.35,110,9.64,120,10.14,135,11.73,143.1,12.192306,150,11.25

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.02	5.32	5.58	5.6	5.71	5.6	5.1	4.31
8	5.96	6.14	6.27	6.38	6.57	6.5	6.2	5.39
10	6.29	6.5	6.75	6.77	7.23	7.29	6.85	6.21
12	6.4	6.66	7.12	7.35	7.66	8.01	7.63	6.85
14	6.45	6.75	7.3	7.82	8.08	8.56	8.66	7.55
16	6.55	6.84	7.4	8.08	8.47	9.09	9.83	8.43
20	6.64	7.01	7.71	8.35	9.64	10.14	11.73	11.25

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.2°	3.28	140.8°	3.73
8	41.8°	4.02	147.3°	4.66
10	39.6°	4.4	154.6°	5.41
12	38.8°	4.51	161°	6
14	38.8°	4.55	156.8°	6.57
16	38.4°	4.63	148.7°	7.3
20	39.3°	4.62	143.1°	9.75

Loading polar chart…