Firefly: ORC Rating

GPH

772

OSN

745.2

LOA

6.505 m

Displacement

886 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5128

Medium

0.7133

High

0.8313

Triple Offshore

Low

0.6644

Medium

0.8823

High

1.0167

Boat Specifications

Dimensions

Length overall: 6.505 m
Beam: 2.51 m
Draft: 1.24 m
Displacement: 886 kg
Crew weight: 275 kg
Wetted surface: 11.11 m²

Sails

Mainsail: 13.74 m²
Genoa: 8.86 m²
Spinnaker: 31.44 m²
Asymmetric spinnaker: 0 m²

Design

Type: F & F 65 STD
Builder: F&F Boats
Designer: Jac de Ridder
Year built: 1992

Performance data

Polar CSV

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

6,44.2,3.626673,52,4.01,60,4.24,75,4.39,90,4.66,110,4.71,120,4.55,135,3.98,147.5,3.50964,150,3.42
8,42.5,4.313167,52,4.81,60,5.03,75,5.19,90,5.54,110,5.6,120,5.47,135,4.98,150,4.38,151.8,4.311795
10,41,4.783297,52,5.34,60,5.54,75,5.72,90,6.05,110,6.14,120,6.03,135,5.73,150,5.2,154.6,5.003679
12,40.1,5.137783,52,5.68,60,5.85,75,6.03,90,6.41,110,6.65,120,6.54,135,6.21,150,5.81,166.2,5.364861
14,39.9,5.370421,52,5.9,60,6.1,75,6.34,90,6.59,110,7.15,120,7.07,135,6.69,150,6.25,176.8,5.738948
16,40.1,5.425394,52,5.99,60,6.26,75,6.63,90,6.75,110,7.57,120,7.67,135,7.22,150,6.7,177.2,6.147339
20,42,5.517094,52,6.04,60,6.35,75,6.9,90,7.37,110,8.14,120,9,135,8.66,150,7.75,177.1,6.978938
24,44,5.546753,52,6.01,60,6.36,75,7,90,7.74,110,8.74,120,10.33,135,12.34,139.2,11.889113,150,10.39

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.01	4.24	4.39	4.66	4.71	4.55	3.98	3.42
8	4.81	5.03	5.19	5.54	5.6	5.47	4.98	4.38
10	5.34	5.54	5.72	6.05	6.14	6.03	5.73	5.2
12	5.68	5.85	6.03	6.41	6.65	6.54	6.21	5.81
14	5.9	6.1	6.34	6.59	7.15	7.07	6.69	6.25
16	5.99	6.26	6.63	6.75	7.57	7.67	7.22	6.7
20	6.04	6.35	6.9	7.37	8.14	9	8.66	7.75
24	6.01	6.36	7	7.74	8.74	10.33	12.34	10.39

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	44.2°	2.6	147.5°	2.96
8	42.5°	3.18	151.8°	3.8
10	41°	3.61	154.6°	4.52
12	40.1°	3.93	166.2°	5.21
14	39.9°	4.12	176.8°	5.73
16	40.1°	4.15	177.2°	6.14
20	42°	4.1	177.1°	6.97
24	44°	3.99	139.2°	9

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 kt24 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)	Boat speed in 24 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	4.01	4.81	5.34	5.68	5.90	5.99	6.04	6.01
60°	4.24	5.03	5.54	5.85	6.10	6.26	6.35	6.36
75°	4.39	5.19	5.72	6.03	6.34	6.63	6.90	7.00
90°	4.66	5.54	6.05	6.41	6.59	6.75	7.37	7.74
110°	4.71	5.60	6.14	6.65	7.15	7.57	8.14	8.74
120°	4.55	5.47	6.03	6.54	7.07	7.67	9.00	10.33
135°	3.98	4.98	5.73	6.21	6.69	7.22	8.66	12.34
150°	3.42	4.38	5.20	5.81	6.25	6.70	7.75	10.39