POPCORN: ORC Rating

GPH

606.3

OSN

587.8

LOA

12.75 m

Displacement

7538 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6641

Medium

0.9096

High

1.0517

Triple Offshore

Low

0.8575

Medium

1.1206

High

1.2574

Boat Specifications

Dimensions

Length overall: 12.75 m
Beam: 3.87 m
Draft: 2.17 m
Displacement: 7538 kg
Crew weight: 540 kg
Wetted surface: 33.39 m²

Sails

Mainsail: 46.26 m²
Genoa: 38.35 m²
Spinnaker: 126.19 m²
Asymmetric spinnaker: 115.2 m²

Design

Type: Spirit 42.5
Builder: Van Heygen
Designer: Ridder J. de
Year built: 2002

Performance data

Polar CSV

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

6,42.8,4.674745,52,5.26,60,5.58,75,5.83,90,5.8,110,5.85,120,5.72,135,5.19,144.5,4.667642,150,4.38
8,41.2,5.542155,52,6.26,60,6.58,75,6.84,90,6.97,110,7.07,120,6.94,135,6.39,148.5,5.594388,150,5.51
10,40.7,6.278571,52,7.01,60,7.24,75,7.4,90,7.58,110,7.7,120,7.63,135,7.3,150,6.512511
12,39.8,6.690238,52,7.36,60,7.55,75,7.72,90,7.83,110,8.09,120,8.06,135,7.79,150,7.3,155.8,7.01662
14,38.8,6.787813,52,7.51,60,7.71,75,7.95,90,8.03,110,8.45,120,8.5,135,8.21,150,7.76,170,7.118141
16,38.6,6.84563,52,7.57,60,7.79,75,8.12,90,8.3,110,8.72,120,8.9,135,8.67,150,8.15,180,7.55
20,38.8,6.967452,52,7.62,60,7.83,75,8.28,90,8.74,110,9.11,120,9.54,135,9.66,150,9.02,180,8.31

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.26	5.58	5.83	5.8	5.85	5.72	5.19	4.38
8	6.26	6.58	6.84	6.97	7.07	6.94	6.39	5.51
10	7.01	7.24	7.4	7.58	7.7	7.63	7.3	6.51
12	7.36	7.55	7.72	7.83	8.09	8.06	7.79	7.3
14	7.51	7.71	7.95	8.03	8.45	8.5	8.21	7.76
16	7.57	7.79	8.12	8.3	8.72	8.9	8.67	8.15
20	7.62	7.83	8.28	8.74	9.11	9.54	9.66	9.02

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.8°	3.43	144.5°	3.8
8	41.2°	4.17	148.5°	4.77
10	40.7°	4.76	150°	5.64
12	39.8°	5.14	155.8°	6.4
14	38.8°	5.29	170°	7.01
16	38.6°	5.35	180°	7.55
20	38.8°	5.43	180°	8.31

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	6.26	7.01	7.36	7.51	7.57	7.62
60°	5.58	6.58	7.24	7.55	7.71	7.79	7.83
75°	5.83	6.84	7.40	7.72	7.95	8.12	8.28
90°	5.80	6.97	7.58	7.83	8.03	8.30	8.74
110°	5.85	7.07	7.70	8.09	8.45	8.72	9.11
120°	5.72	6.94	7.63	8.06	8.50	8.90	9.54
135°	5.19	6.39	7.30	7.79	8.21	8.67	9.66
150°	4.38	5.51	6.51	7.30	7.76	8.15	9.02