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Sailboat Specifications

Slipper 42

Masthead Ketch · Fin With Rudder On Skeg

Designed by Robin Chadworth-Musters/Alan Gurney · Built by Tyler Boat Works (Uk) · First built 1978

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LOA 42.00 ft  ·  Beam 12.25 ft  ·  Displacement 16,500.00 lb  ·  Sail Area 640.00 ft²  ·  Masthead Ketch  ·  Fin With Rudder On Skeg
About the Slipper 42 Sailboat

Designed by the collaborative team of Robin Chadworth-Musters and Alan Gurney, this British-built cruising yacht emerged from Tyler Boat Works in 1978 as a thoughtful answer to serious offshore sailing demands. The Slipper 42 embodies classic late-1970s design philosophy with its masthead ketch rig and fin keel configuration paired with a rudder mounted on a protective skeg. With a displacement of 16,500 pounds and substantial ballast ratio, this fiberglass yacht prioritizes seaworthiness over speed, making it particularly well-suited for extended coastal cruising and offshore passages. The generous beam of 12.25 feet provides excellent stability and interior volume, while the moderate draft allows access to a reasonable range of harbors and anchorages. The ketch rig offers versatility in heavy weather conditions, allowing sailors to reduce sail area by dropping the mainsail while maintaining balance under mizzen and headsail alone. This configuration, combined with the boat's conservative comfort ratio of 26.79, suggests a yacht designed for those who value safety and comfort over racing performance. Tyler Boat Works' reputation for solid construction translates into a robust cruising platform capable of handling challenging conditions with confidence, making the Slipper 42 an appealing choice for serious cruising sailors seeking a proven offshore design.

Dimensions & Specifications
LOA (Length Overall) 42.00 ft / 12.80 m
LWL (Waterline Length) 30.33 ft / 9.24 m
Beam 12.25 ft / 3.73 m
Max Draft 6.00 ft / 1.83 m
Displacement 16,500.00 lb / 7,484 kg
Ballast 7,163.00 lb / 3,249 kg
Sail Area (Reported) 640.00 ft² / 59.46 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Ketch
Construction FG
Designer Robin Chadworth-Musters/Alan Gurney
Builder Tyler Boat Works (UK)
First Built 1978
Related Sailboats Whitby 42 · Passport 42 · Tartan 42 · Irwin 42 · Swan 42
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Engine & Accommodations
Fuel Capacity 114 gals / 432 L
Water Capacity 115 gals / 435 L
Frequently Asked Questions

What is the Slipper 42's sail area to displacement ratio?

The Slipper 42 has a Sail Area to Displacement ratio (SA/D) of 15.86. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Slipper 42's comfort ratio?

The Slipper 42 has a Ted Brewer Comfort Ratio of 26.79. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Slipper 42 safe for offshore sailing?

The Slipper 42 has a Capsize Screening Formula value of 1.93. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Slipper 42?

The theoretical hull speed of the Slipper 42 is 7.38 kn knots, calculated from its waterline length.

How much does a Slipper 42 weigh?

The Slipper 42 has a displacement of 16,500.00 lb and a length overall (LOA) of 42.00 ft.

Who designed the Slipper 42?

The Slipper 42 was designed by Robin Chadworth-Musters/Alan Gurney, first built in 1978.