Firefly: ORC Rating

GPH

796.7

OSN

770.8

LOA

7.5 m

Displacement

1901 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.502

Medium

0.6913

High

0.8144

Triple Offshore

Low

0.6476

Medium

0.8539

High

0.9712

Boat Specifications

Dimensions

Length overall: 7.5 m
Beam: 2.3 m
Draft: 1.25 m
Displacement: 1901 kg
Crew weight: 240 kg
Wetted surface: 12.56 m²

Sails

Mainsail: 12.68 m²
Genoa: 14.27 m²
Spinnaker: 32.11 m²
Asymmetric spinnaker: 0 m²

Design

Type: Flamenca
Builder: Nebe
Designer: Berckemeyer
Year built: 1976
Stability index: 121.7

Performance data

Polar CSV

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

6,44.2,3.54298,52,3.94,60,4.19,75,4.37,90,4.39,110,4.46,120,4.33,135,3.93,148.4,3.451811,150,3.4
8,42.9,4.17723,52,4.68,60,4.96,75,5.18,90,5.32,110,5.42,120,5.28,135,4.84,150,4.3,152.3,4.212816
10,43,4.71728,52,5.25,60,5.49,75,5.66,90,5.86,110,5.92,120,5.85,135,5.59,150,5.08,153.8,4.914972
12,42.4,5.145877,52,5.61,60,5.78,75,5.92,90,6.14,110,6.23,120,6.17,135,5.98,150,5.68,161,5.340984
14,40.8,5.336891,52,5.82,60,5.96,75,6.11,90,6.33,110,6.54,120,6.48,135,6.28,150,6.02,175.4,5.588
16,40.5,5.44446,52,5.93,60,6.09,75,6.29,90,6.44,110,6.83,120,6.81,135,6.59,150,6.29,179,5.930903
20,41.1,5.480627,52,5.97,60,6.18,75,6.56,90,6.78,110,7.22,120,7.4,135,7.24,150,6.89,179,6.460984

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	3.94	4.19	4.37	4.39	4.46	4.33	3.93	3.4
8	4.68	4.96	5.18	5.32	5.42	5.28	4.84	4.3
10	5.25	5.49	5.66	5.86	5.92	5.85	5.59	5.08
12	5.61	5.78	5.92	6.14	6.23	6.17	5.98	5.68
14	5.82	5.96	6.11	6.33	6.54	6.48	6.28	6.02
16	5.93	6.09	6.29	6.44	6.83	6.81	6.59	6.29
20	5.97	6.18	6.56	6.78	7.22	7.4	7.24	6.89

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.2°	2.54	148.4°	2.94
8	42.9°	3.06	152.3°	3.73
10	43°	3.45	153.8°	4.41
12	42.4°	3.8	161°	5.05
14	40.8°	4.04	175.4°	5.57
16	40.5°	4.14	179°	5.93
20	41.1°	4.13	179°	6.46

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°	3.94	4.68	5.25	5.61	5.82	5.93	5.97
60°	4.19	4.96	5.49	5.78	5.96	6.09	6.18
75°	4.37	5.18	5.66	5.92	6.11	6.29	6.56
90°	4.39	5.32	5.86	6.14	6.33	6.44	6.78
110°	4.46	5.42	5.92	6.23	6.54	6.83	7.22
120°	4.33	5.28	5.85	6.17	6.48	6.81	7.40
135°	3.93	4.84	5.59	5.98	6.28	6.59	7.24
150°	3.40	4.30	5.08	5.68	6.02	6.29	6.89