The Firefly is a 12.0ft fractional sloop designed by Uffa Fox and built in fiberglass by Fairey Marine Ltd since 1946.
The Firefly is an ultralight sailboat which is a very high performer. It is stable / stiff and has a low righting capability if capsized. It is best suited as a day-boat.
Main features
| Model | Firefly | ||
| Length | 12 ft | ||
| Beam | 4.67 ft | ||
| Draft | 0.83 ft | ||
| Country | United Kingdom (Europe) | ||
| Estimated price | $ 0 | ?? | 
Ratios
| Sail area / displ. | 26.73 | ||
| Ballast / displ. | 0 % | ||
| Displ. / length | 71.55 | ||
| Comfort ratio | 4.36 | ||
| Capsize | 2.93 | 
Hull
| Hull type | Centerboard Dinghy | ||
| Construction | Fiberglass | ||
| Waterline length | 11.75 ft | ||
| Maximum draft | 4.25 ft | ||
| Displacement | 260 lbs | ||
| Ballast | 0 lbs | ||
| Hull speed | 4.59 knots | 
Rigging
| Rigging | Fractional Sloop | ||
| Sail area (100%) | 68 sq.ft | ||
| Air draft | 0 ft | ?? | |
| Sail area fore | 0 sq.ft | ?? | |
| Sail area main | 0 sq.ft | ?? | |
| I | 0 ft | ?? | |
| J | 0 ft | ?? | |
| P | 0 ft | ?? | |
| E | 0 ft | ?? | 
Engine
| Nb engines | 1 | ||
| Total power | 0 HP | ||
| Fuel capacity | 0 gals | 
Accommodations
| Water capacity | 0 gals | ||
| Headroom | 0 ft | ||
| Nb of cabins | 0 | ||
| Nb of berths | 0 | ||
| Nb heads | 0 | 
Builder data
| Builder | Fairey Marine Ltd | ||
| Designer | Uffa Fox | ||
| First built | 1946 | ||
| Last built | 0 | ?? | |
| Number built | 0 | ?? | 
 
                         
                                                     
                                     
                                         
                                         
                                         
                                         
                                         
                                        