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Challenger 38 Ketch
Designer: Howard Stern  ·  Builder: Challenger Yachts Corp. (Usa)  ·  First built: 1972
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About the Challenger 38 Ketch

Designed by Howard Stern and built by Challenger Yachts Corp. beginning in 1972, this masthead ketch represents solid American fiberglass construction from sailing's golden era of production cruising boats. With nearly 40 feet of overall length but a moderate 12.83-foot beam, the Challenger 38 strikes a practical balance between interior volume and seaworthiness. The ketch rig configuration provides excellent sail handling flexibility, particularly appealing to couples or short-handed crews tackling longer passages. The ability to drop the mainsail and continue under jib and mizzen makes heavy weather management more manageable, while the divided sail plan reduces individual sail sizes for easier handling. Her fin keel with rudder mounted on a protective skeg offers good performance while maintaining directional stability – a sensible compromise for serious cruising sailors. The substantial 24,800-pound displacement and conservative comfort ratio of 35.81 suggest this boat was designed for offshore capability rather than speed, making her well-suited for coastal cruising and extended passages. The capsize screening formula of 1.76 indicates good stability characteristics for ocean sailing, while the hull's design limits her theoretical hull speed to 7.81 knots. This Challenger prioritizes safety and comfort over racing performance, appealing to cruisers seeking a dependable, seaworthy vessel.

Core Dimensions
LOA (Length Overall) 39.92 ft / 12.17 m
LWL (Waterline Length) 34.00 ft / 10.36 m
Beam 12.83 ft / 3.91 m
Max Draft 6.00 ft / 1.83 m
Displacement 24,800.00 lb / 11,249 kg
Sail Area (Reported) 698.00 ft² / 64.85 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Ketch
Construction FG
Designer Howard Stern
Builder Challenger Yachts Corp. (USA)
First Built 1972
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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
13.18
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
281.69
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
35.81
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
1.76
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. 7.81 kn
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
1.29
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. 1,558.66 pounds/inch
SA/Displacement (Calc) Calculated Sail Area to Displacement ratio using actual measured sail dimensions rather than reported values. More precise than the reported SA/Disp figure. 10.8
Rig Dimensions
I (Foretriangle Height) 45.00 ft / 13.72 m
J (Foretriangle Base) 12.68 ft / 3.86 m
P (Mainsail Luff) 39.50 ft / 12.04 m
E (Mainsail Foot) 14.50 ft / 4.42 m
SA Fore 285.30 ft² / 26.51 m²
SA Main 286.38 ft² / 26.61 m²
SA Total (100%) 571.68 ft² / 53.11 m²
Est. Forestay Length 46.75 ft / 14.25 m
Engine & Accommodations
Engine Make Perkins
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