Design and Construction
The Inferno 26 measures 22 feet 4 inches on the waterline and has a beam of just over 8 feet. Its length-to-beam ratio of 3.19 and displacement-length ratio of 164 describe a narrow-ish, very light hull for its waterline. Displacement is roughly 4,078 pounds, while the fin keel carries 1,653 pounds of iron ballast, giving a ballast ratio of nearly 41 percent. These figures place the boat firmly among the “light racers” of its era rather than the heavier cruising designs.
Both the hull and deck are solid fiberglass, and the keel is iron rather than lead. Draft ranges from 4.92 to 5.22 feet, depending on load, keeping the boat within reach of most marina approaches despite its fin keel.
Wetted surface is about 215 square feet. At 632 pounds per inch of immersion, the hull sits sensitively in the water but isn’t unusually tender for its type. Its Motion Comfort Ratio of 16.4 is low, confirming that this is a lively, athletic platform rather than a soft-riding cruiser.
Rig and Handling
The fractional sloop rig is central to the Inferno 26’s character. Sail-area-to-displacement ratio is 21.2 with the ISO reference sail, rising to 24.5 with a 135 percent genoa. The design carries more rig than 96 percent of similar sailboats, making it significantly overrigged for its size.
The halyards and sheets are generously specified for the loads involved. All three halyards use 26.8 m of 8 mm line. The mainsheet is 19.8 m long, and the genoa sheets are 7.9 m; both use 10 mm line.
A fin keel and spade rudder give the boat the agility those specifications imply.
Performance
The Inferno 26 was built to accelerate. Its light displacement and tall fractional rig deliver a turn of speed that few 26-footers of the period could match. Its Relative Speed Performance index is 98, meaning it is quicker than 98 percent of comparable designs, while theoretical displacement-hull speed is 6.3 knots.
That performance comes with a clear trade-off in motion. The low comfort ratio points to a short, quick ride that can occasionally become skittish in a chop. The capsize screening value of 2.04 is high enough that the boat would not qualify for ocean races, setting a useful boundary for sailors considering offshore ambitions. Its performance envelope is coastal and sporty rather than expeditionary.
Accommodations and Layout
The boat’s size and classification as a light racer suggest a minimal cruising interior appropriate to a 26-foot racer-cruiser.
Known Issues
Because the keel is iron, a surveyor should look for corrosion or evidence of previous repair.
Verdict
The Inferno 26 is a genuinely fast small racer-cruiser. Södergren’s lines and the powerful fractional rig give it speed that few contemporary peers can match. It is a lively coastal boat best suited to sailors who value acceleration and handling more than motion comfort or bluewater credentials.
Pros
- Significantly overrigged fractional sloop; faster than 98 percent of similar designs
- Light, agile fin-keel platform with a spade rudder
- Solid-fiberglass hull and deck
- Manageable draft of 4.92 to 5.22 feet
Cons
- Capsize screening value of 2.04 excludes it from ocean racing
- Motion Comfort Ratio of 16.4 indicates a busy ride
