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Cobra 750
Designer: David Feltham  ·  Builder: Cobra Yachts (Uk)  ·  First built: 1977
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About the Cobra 750

Designed by David Feltham and built by Cobra Yachts in the UK starting in 1977, this 25-foot sailboat became a popular choice for coastal cruising and club racing during its production run of 500 units. The twin keel configuration sets the Cobra 750 apart from many boats in its class, offering the practical advantage of drying out upright in tidal waters while maintaining reasonable sailing performance. With its masthead sloop rig and 360 square feet of sail area, the boat delivers respectable performance for both recreational sailing and competitive racing. The twin keel design, while slightly compromising upwind ability compared to a fin keel, provides excellent directional stability and allows access to shallow waters and drying moorings that would be impossible for deeper-draft vessels. The fiberglass construction and moderate displacement of 5,800 pounds, combined with 2,240 pounds of ballast, creates a stable platform suitable for family cruising in protected waters. The comfort ratio of 20.46 indicates a relatively stiff, quick motion at sea, while the capsize screening formula of 2.16 suggests this boat is best suited for coastal and near-shore sailing rather than extended offshore passages. The compact 10-horsepower engine provides adequate auxiliary power for maneuvering in harbors and calm conditions.

Core Dimensions
LOA (Length Overall) 25.00 ft / 7.62 m
LWL (Waterline Length) 19.75 ft / 6.02 m
Beam 9.67 ft / 2.95 m
Max Draft 3.50 ft / 1.07 m
Displacement 5,800.00 lb / 2,631 kg
Ballast 2,240.00 lb / 1,016 kg
Sail Area (Reported) 360.00 ft² / 33.45 m²
Design & Construction
Hull Type Twin Keel
Rigging Type Masthead Sloop
Construction FG
Designer David Feltham
Builder Cobra Yachts (UK)
First Built 1977
Number Built 500
Associations Cobra and Seawolf Owners Association
Owner Reviews

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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
17.9
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
38.62
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
336.11
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
20.46
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
2.16
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. 5.96 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. 682.40 pounds/inch
Engine & Accommodations
Engine Make Volvo
Engine Type Diesel
Horsepower 10
Fuel Capacity 8 gals / 30 L
Water Capacity 12 gals / 45 L
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