Muschka: ORC Rating

GPH

622.5

OSN

609.1

LOA

12.5 m

Displacement

7000 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7391

Medium

0.9838

High

1.1271

Triple Offshore

Low

0.9596

Medium

1.2184

High

1.3512

Boat Specifications

Dimensions

Length overall: 12.5 m
Beam: 3.38 m
Draft: 1.53 m
Displacement: 7000 kg
Crew weight: 612 kg
Wetted surface: 28.05 m²

Sails

Mainsail: 48.55 m²
Genoa: 40.57 m²
Spinnaker: 96 m²
Asymmetric spinnaker: 85.67 m²

Design

Type: 75m2 nationale kru
Builder: W von Hacht
Designer: W van Hacht
Year built: 1923

Performance data

Polar CSV

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

6,42.9,4.846133,52,5.41,60,5.73,75,6,90,5.97,110,5.73,120,5.56,135,5.02,139.2,4.795276,150,4.19
8,42.5,5.710199,52,6.4,60,6.71,75,6.92,90,6.93,110,6.89,120,6.74,135,6.15,150,5.25,150.9,5.195862
10,42.7,6.313659,52,6.91,60,7.13,75,7.31,90,7.36,110,7.44,120,7.35,135,7.03,148.5,6.33327,150,6.24
12,41.8,6.50591,52,7.11,60,7.33,75,7.54,90,7.64,110,7.79,120,7.74,135,7.48,150,7.05,157.3,6.72059
14,41.2,6.592108,52,7.22,60,7.44,75,7.72,90,7.88,110,8.12,120,8.11,135,7.84,150,7.47,180,6.84
16,40.9,6.654729,52,7.27,60,7.5,75,7.83,90,8.09,110,8.38,120,8.46,135,8.22,150,7.81,180,7.32
20,40.6,6.743308,52,7.34,60,7.56,75,7.96,90,8.42,110,8.7,120,9,135,8.98,150,8.53,180,8

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.41	5.73	6	5.97	5.73	5.56	5.02	4.19
8	6.4	6.71	6.92	6.93	6.89	6.74	6.15	5.25
10	6.91	7.13	7.31	7.36	7.44	7.35	7.03	6.24
12	7.11	7.33	7.54	7.64	7.79	7.74	7.48	7.05
14	7.22	7.44	7.72	7.88	8.12	8.11	7.84	7.47
16	7.27	7.5	7.83	8.09	8.38	8.46	8.22	7.81
20	7.34	7.56	7.96	8.42	8.7	9	8.98	8.53

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.9°	3.55	139.2°	3.63
8	42.5°	4.21	150.9°	4.54
10	42.7°	4.64	148.5°	5.4
12	41.8°	4.85	157.3°	6.2
14	41.2°	4.96	180°	6.84
16	40.9°	5.03	180°	7.32
20	40.6°	5.12	180°	8

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°	5.41	6.40	6.91	7.11	7.22	7.27	7.34
60°	5.73	6.71	7.13	7.33	7.44	7.50	7.56
75°	6.00	6.92	7.31	7.54	7.72	7.83	7.96
90°	5.97	6.93	7.36	7.64	7.88	8.09	8.42
110°	5.73	6.89	7.44	7.79	8.12	8.38	8.70
120°	5.56	6.74	7.35	7.74	8.11	8.46	9.00
135°	5.02	6.15	7.03	7.48	7.84	8.22	8.98
150°	4.19	5.25	6.24	7.05	7.47	7.81	8.53