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Sailboat Specifications

Inferno 31

Fractional Sloop · Fin W/Spade Rudder

Designed by Håkan Södergren · Built by Finngulf · First built 1983

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LOA 31.00 ft  ·  Beam 9.84 ft  ·  Displacement 9,479.00 lb  ·  Sail Area 512.00 ft²  ·  Fractional Sloop  ·  Fin W/Spade Rudder
About the Inferno 31 Sailboat

With limited documentation available, the Inferno 31 represents one of those intriguing sailboats that exists somewhat in the shadows of sailing history. This 31-foot vessel appears to have been designed during an era when builders were experimenting with performance-oriented designs for the growing recreational sailing market. Based on the naming convention and size class, the Inferno 31 likely falls into the sport cruiser category, designed to offer spirited sailing performance while maintaining reasonable accommodations for weekend cruising or coastal adventures. The "Inferno" moniker suggests a boat built with speed and excitement in mind, rather than heavy cruising comfort. Without comprehensive specifications readily available, prospective buyers should approach this model with thorough pre-purchase research and professional survey work. The limited documentation could indicate either a smaller production run or a boat that didn't achieve widespread market penetration, which sometimes creates opportunities for savvy buyers seeking unique vessels. For sailors drawn to less common designs, the Inferno 31 might offer an interesting alternative to mainstream production boats, though the scarcity of readily available information underscores the importance of careful evaluation and expert consultation before making any purchase decisions.

Dimensions & Specifications
LOA (Length Overall) 31.00 ft / 9.45 m
LWL (Waterline Length) 25.60 ft / 7.80 m
Beam 9.84 ft / 3.00 m
Max Draft 5.25 ft / 1.60 m
Displacement 9,479.00 lb / 4,300 kg
Ballast 2,204.00 lb / 1,000 kg
Sail Area (Reported) 512.00 ft² / 47.57 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Håkan Södergren
Builder Finngulf
First Built 1983
Related Sailboats Mp 31 · Hughes 31 · Bristol 311 · Parker 31 · Cr 310
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Engine & Accommodations
Horsepower 18
Frequently Asked Questions

What is the Inferno 31's sail area to displacement ratio?

The Inferno 31 has a Sail Area to Displacement ratio (SA/D) of 18.35. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Inferno 31's comfort ratio?

The Inferno 31 has a Ted Brewer Comfort Ratio of 25.6. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Inferno 31 safe for offshore sailing?

The Inferno 31 has a Capsize Screening Formula value of 1.86. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Inferno 31?

The theoretical hull speed of the Inferno 31 is 6.78 knots, calculated from its waterline length.

How much does a Inferno 31 weigh?

The Inferno 31 has a displacement of 9,479.00 lb and a length overall (LOA) of 31.00 ft.

Who designed the Inferno 31?

The Inferno 31 was designed by Håkan Södergren, first built in 1983.