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Sailboat Specifications

J39

Masthead Sloop · Fin W/Spade Rudder

Designed by Rodney S. Johnstone · Built by J Boats Tillotson Pearson · First built 1989

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LOA 39.42 ft  ·  Beam 12.42 ft  ·  Displacement 12,900.00 lb  ·  Sail Area 799.00 ft²  ·  Masthead Sloop  ·  Fin W/Spade Rudder
About the J39 Sailboat

With limited technical specifications publicly available, the J39 represents an intriguing chapter in J/Boats' evolution of performance-oriented sailing yachts. This model fits within the company's philosophy of creating boats that blur the lines between competitive racing and comfortable cruising, appealing to sailors who refuse to compromise on either front. Building on J/Boats' reputation for producing well-balanced designs that excel in diverse conditions, the J39 likely incorporates the brand's signature characteristics: responsive handling, solid construction, and thoughtful ergonomics both above and below deck. The boat appears designed for sailors seeking a capable platform for coastal cruising and club racing, where versatility matters more than specialization. Given J/Boats' consistent approach to hull design and rigging systems, the J39 probably offers the predictable sailing characteristics that have made the marque popular among both experienced racers and cruising families. While detailed specifications remain scarce, the boat's position in the J/Boats lineup suggests it delivers the company's trademark combination of speed, stability, and seaworthiness that has defined their designs for decades.

Dimensions & Specifications
LOA (Length Overall) 39.42 ft / 12.02 m
LWL (Waterline Length) 32.50 ft / 9.91 m
Beam 12.42 ft / 3.79 m
Max Draft 7.25 ft / 2.21 m
Displacement 12,900.00 lb / 5,851 kg
Ballast 5,900.00 lb / 2,676 kg
Sail Area (Reported) 799.00 ft² / 74.23 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Rodney S. Johnstone
Builder J Boats Tillotson Pearson
First Built 1989
Last Built 1997
Related Sailboats Farr 395 · X 119 · Cc 37 2 · Baltic 40 · Swan 39
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Frequently Asked Questions

What is the J39's sail area to displacement ratio?

The J39 has a Sail Area to Displacement ratio (SA/D) of 23.32. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the J39's comfort ratio?

The J39 has a Ted Brewer Comfort Ratio of 20.12. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the J39 safe for offshore sailing?

The J39 has a Capsize Screening Formula value of 2.12. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the J39?

The theoretical hull speed of the J39 is 7.64 knots, calculated from its waterline length.

How much does a J39 weigh?

The J39 has a displacement of 12,900.00 lb and a length overall (LOA) of 39.42 ft.

Who designed the J39?

The J39 was designed by Rodney S. Johnstone, first built in 1989.