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Sailboat Specifications

J/34

Masthead Sloop · Fin W/Spade Rudder

Designed by Rod Johnstone · First built 1985

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LOA 34.08 ft  ·  Beam 11.42 ft  ·  Displacement 9,200 lb  ·  Sail Area 525 ft²  ·  Masthead Sloop  ·  Fin W/Spade Rudder
Dimensions & Specifications
LOA (Length Overall) 34.08 ft / 10.39 m
LWL (Waterline Length) 28.50 ft / 8.69 m
Beam 11.42 ft / 3.48 m
Max Draft 5.67 ft / 1.73 m
Displacement 9,200 lb / 4,173 kg
Ballast 3,800 lb / 1,724 kg
Sail Area (Reported) 525 ft² / 48.78 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Rod Johnstone
First Built 1985
Last Built 1987
Number Built 25
Related Sailboats Olson 34 · Express 34 · Ericson 34 · Sweden Yachts 340 · Dash 34
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Frequently Asked Questions

What is the J/34's sail area to displacement ratio?

The J/34 has a Sail Area to Displacement ratio (SA/D) of 20.06. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the J/34's comfort ratio?

The J/34 has a Ted Brewer Comfort Ratio of 26.2. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the J/34 safe for offshore sailing?

The J/34 has a Capsize Screening Formula value of 1.71. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the J/34?

The theoretical hull speed of the J/34 is 8.23 knots, calculated from its waterline length.

How much does a J/34 weigh?

The J/34 has a displacement of 9,200 lb and a length overall (LOA) of 34.08 ft.

Who designed the J/34?

The J/34 was designed by Rod Johnstone, first built in 1985.