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Sailboat Specifications

Firefly

Fractional Sloop · Centerboard Dinghy

Designed by Uffa Fox · Built by Fairey Marine (Uk) · First built 1946

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LOA 12.00 ft  ·  Beam 4.67 ft  ·  Displacement 260.00 lb  ·  Sail Area 68  ·  Fractional Sloop  ·  Centerboard Dinghy
About the Firefly Sailboat

Originally designed as a nimble single-handed dinghy, the Firefly represents a classic approach to small boat sailing that has captured enthusiasts for decades. This compact sailboat earned its reputation through elegant simplicity and responsive handling characteristics that make it an excellent choice for both learning sailors and experienced skippers seeking pure sailing enjoyment. Built for coastal waters and protected bays, the Firefly excels in day sailing and informal racing scenarios. Its lightweight construction and efficient sail plan deliver spirited performance in moderate conditions, while remaining manageable for solo operation. The boat's forgiving nature makes it particularly well-suited for sailing schools and yacht clubs developing new sailors. The design emphasizes traditional sailing fundamentals without unnecessary complexity. Clean lines and straightforward rigging allow sailors to focus on boat handling skills and wind awareness rather than managing complicated systems. Many sailing programs have adopted the Firefly specifically for its ability to teach proper technique while providing genuine sailing excitement. While not intended for extended cruising or challenging offshore conditions, the Firefly delivers authentic small boat sailing experiences that remind sailors why they fell in love with the sport initially.

Dimensions & Specifications
LOA (Length Overall) 12.00 ft / 3.66 m
LWL (Waterline Length) 11.75 ft / 3.58 m
Beam 4.67 ft / 1.42 m
Max Draft 4.25 ft / 1.30 m
Min Draft 0.83
Displacement 260.00 lb / 118 kg
Sail Area (Reported) 68
Design & Construction
Hull Type Centerboard Dinghy
Rigging Type Fractional Sloop
Construction Wood (hot molded)/FG
Designer Uffa Fox
Builder Fairey Marine (UK)
First Built 1946
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Frequently Asked Questions

What is the Firefly's sail area to displacement ratio?

The Firefly has a Sail Area to Displacement ratio (SA/D) of 26.73. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Firefly's comfort ratio?

The Firefly has a Ted Brewer Comfort Ratio of 4.36. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Firefly safe for offshore sailing?

The Firefly has a Capsize Screening Formula value of 2.93. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Firefly?

The theoretical hull speed of the Firefly is 4.59 knots, calculated from its waterline length.

How much does a Firefly weigh?

The Firefly has a displacement of 260.00 lb and a length overall (LOA) of 12.00 ft.

Who designed the Firefly?

The Firefly was designed by Uffa Fox, first built in 1946.