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Seawolf 26
Designer: David Feltham  ·  Builder: Seawolf Yachts Ltd.  ·  First built: 1978
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About the Seawolf 26

Designed by David Feltham and built by Seawolf Yachts Ltd. starting in 1978, this compact cruiser represents a thoughtful approach to shallow-water sailing with its distinctive twin keel configuration. With only 50 hulls produced, the Seawolf 26 remains a relatively rare find that offers unique advantages for coastal exploration and estuary sailing. The twin keel design allows the boat to sit upright when dried out, making it ideal for areas with significant tidal range or shallow anchorages where traditional deep-draft boats cannot venture. This characteristic, combined with the modest 3-foot draft, opens up countless creeks, harbors, and beaches that remain inaccessible to most sailboats of similar size. At 26 feet overall with a fractional sloop rig carrying 315 square feet of sail, this fiberglass construction yacht strikes a practical balance between performance and ease of handling. The comfort ratio of 18.24 suggests a relatively stiff, quick motion that favors day sailing and coastal passages rather than extended offshore voyaging. The substantial ballast-to-displacement ratio provides good stability despite the shoal draft configuration. Best suited for coastal cruising, weekend sailing, and exploration of shallow waters, the Seawolf 26 appeals to sailors seeking adventure in areas where conventional keelboats fear to tread.

Core Dimensions
LOA (Length Overall) 26.08 ft / 7.95 m
LWL (Waterline Length) 20.50 ft / 6.25 m
Beam 9.50 ft / 2.90 m
Max Draft 3.00 ft / 0.91 m
Displacement 5,250.00 lb / 2,381 kg
Ballast 2,240.00 lb / 1,016 kg
Sail Area (Reported) 315.00 ft² / 29.26 m²
Design & Construction
Hull Type Twin Keel
Rigging Type Fractional Sloop
Construction FG
Designer David Feltham
Builder Seawolf Yachts Ltd.
First Built 1978
Number Built 50
Associations Cobra and Seawolf Owners Association
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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
16.73
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
42.67
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
272.05
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
18.24
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
2.19
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 6.07 kn
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 695.86 pounds/inch
Engine & Accommodations
Engine Make Volvo Penta
Engine Model 2001
Engine Type Diesel
Horsepower 7.5
Fuel Capacity 10 gals / 38 L
Water Capacity 20 gals / 76 L
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