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Sailboat Specifications

J/42

Masthead Sloop · Fin W/Spade Rudder

Designed by Rod Johnstone · First built 1994

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LOA 42.50 ft  ·  Beam 13.50 ft  ·  Displacement 19,000 lb  ·  Sail Area 840 ft²  ·  Masthead Sloop  ·  Fin W/Spade Rudder
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Dimensions & Specifications
LOA (Length Overall) 42.50 ft / 12.95 m
LWL (Waterline Length) 36.00 ft / 10.97 m
Beam 13.50 ft / 4.11 m
Max Draft 7.00 ft / 2.13 m
Displacement 19,000 lb / 8,618 kg
Ballast 8,000 lb / 3,629 kg
Sail Area (Reported) 840 ft² / 78.04 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Rod Johnstone
First Built 1994
Last Built 2002
Number Built 90
Related Sailboats First 42S7 Beneteau · Catalina 425 · Sabre 425 · Contest 43 · Sun Odyssey 415 Jeanneau
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Frequently Asked Questions

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

The J/42 has a Sail Area to Displacement ratio (SA/D) of 17.04. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the J/42's comfort ratio?

The J/42 has a Ted Brewer Comfort Ratio of 34.08. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the J/42 safe for offshore sailing?

The J/42 has a Capsize Screening Formula value of 1.59. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the J/42?

The theoretical hull speed of the J/42 is 9.80 knots, calculated from its waterline length.

How much does a J/42 weigh?

The J/42 has a displacement of 19,000 lb and a length overall (LOA) of 42.50 ft.

Who designed the J/42?

The J/42 was designed by Rod Johnstone, first built in 1994.