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Sailboat Specifications

J/105

Fractional Sloop · Fin W/Bulb & Spade Rudder

Designed by Rod Johnstone · First built 1992

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LOA 34.50 ft  ·  Beam 11.00 ft  ·  Displacement 7,800 lb  ·  Sail Area 600 ft²  ·  Fractional Sloop  ·  Fin W/Bulb & Spade Rudder
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Dimensions & Specifications
LOA (Length Overall) 34.50 ft / 10.52 m
LWL (Waterline Length) 30.00 ft / 9.14 m
Beam 11.00 ft / 3.35 m
Max Draft 6.00 ft / 1.83 m
Displacement 7,800 lb / 3,538 kg
Ballast 3,500 lb / 1,588 kg
Sail Area (Reported) 600 ft² / 55.74 m²
Design & Construction
Hull Type Fin w/bulb & spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Rod Johnstone
First Built 1992
Number Built 700
Related Sailboats J105 · Tartan 34 2 · Pearson 34 2 · Maxi 100 · Tanzer 105
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Frequently Asked Questions

What is the J/105's sail area to displacement ratio?

The J/105 has a Sail Area to Displacement ratio (SA/D) of 24.12. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the J/105's comfort ratio?

The J/105 has a Ted Brewer Comfort Ratio of 22.28. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the J/105 safe for offshore sailing?

The J/105 has a Capsize Screening Formula value of 1.66. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the J/105?

The theoretical hull speed of the J/105 is 8.40 knots, calculated from its waterline length.

How much does a J/105 weigh?

The J/105 has a displacement of 7,800 lb and a length overall (LOA) of 34.50 ft.

Who designed the J/105?

The J/105 was designed by Rod Johnstone, first built in 1992.

Resources & Community
⚓ Class Association J/105 Class Association