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Sailboat Specifications

J34

Masthead Sloop · Fin W/Spade Rudder

Designed by Rodney S. Johnstone · Built by J Boats Tillotson Pearson · First built 1985

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LOA 34.00 ft  ·  Beam 11.20 ft  ·  Displacement 8,100.00 lb  ·  Sail Area 505.00 ft²  ·  Masthead Sloop  ·  Fin W/Spade Rudder
About the J34 Sailboat

With limited specifications available in current databases, the J34 represents an intriguing gap in sailboat documentation that highlights the challenges of preserving comprehensive records for all production vessels. This boat appears to be part of the broader J-Boats lineage, a manufacturer renowned for creating performance-oriented sailboats that balance racing capability with cruising comfort. Given J-Boats' established design philosophy, the J34 likely embodies the company's signature approach of clean lines, efficient rigs, and responsive handling characteristics. The manufacturer has consistently focused on creating boats that appeal to sailors seeking spirited performance without sacrificing livability, suggesting this model would suit coastal cruising and club racing environments. The scarcity of readily available information about the J34 may indicate limited production numbers or a shorter manufacturing run compared to other J-Boats models. For prospective buyers interested in this particular vessel, conducting thorough research through sailing forums, contacting J-Boats directly, or connecting with existing owners becomes especially important to understand the boat's specific characteristics, performance traits, and any unique design elements that distinguish it within the J-Boats family.

Dimensions & Specifications
LOA (Length Overall) 34.00 ft / 10.36 m
LWL (Waterline Length) 26.00 ft / 7.92 m
Beam 11.20 ft / 3.41 m
Max Draft 6.20 ft / 1.89 m
Displacement 8,100.00 lb / 3,674 kg
Ballast 3,400.00 lb / 1,542 kg
Sail Area (Reported) 505.00 ft² / 46.92 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 1985
Last Built 1987
Related Sailboats Olson 34 · Catalina 34 · C&C 34 · Express 34 · Olson 34 Ericson
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Frequently Asked Questions

What is the J34's sail area to displacement ratio?

The J34 has a Sail Area to Displacement ratio (SA/D) of 20.1. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the J34's comfort ratio?

The J34 has a Ted Brewer Comfort Ratio of 17.65. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the J34 safe for offshore sailing?

The J34 has a Capsize Screening Formula value of 2.23. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the J34?

The theoretical hull speed of the J34 is 6.83 knots, calculated from its waterline length.

How much does a J34 weigh?

The J34 has a displacement of 8,100.00 lb and a length overall (LOA) of 34.00 ft.

Who designed the J34?

The J34 was designed by Rodney S. Johnstone, first built in 1985.