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Sailboat Specifications

J/109

Fractional Sloop · Fin W/Spade Rudder

Designed by Alan Johnstone · First built 2003

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LOA 35.83 ft  ·  Beam 11.75 ft  ·  Displacement 11,500 lb  ·  Sail Area 626 ft²  ·  Fractional Sloop  ·  Fin W/Spade Rudder
Dimensions & Specifications
LOA (Length Overall) 35.83 ft / 10.92 m
LWL (Waterline Length) 30.33 ft / 9.25 m
Beam 11.75 ft / 3.58 m
Max Draft 6.83 ft / 2.08 m
Displacement 11,500 lb / 5,216 kg
Ballast 5,000 lb / 2,268 kg
Sail Area (Reported) 626 ft² / 58.16 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Alan Johnstone
First Built 2003
Number Built 400
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Frequently Asked Questions

What is the J/109's sail area to displacement ratio?

The J/109 has a Sail Area to Displacement ratio (SA/D) of 18.63. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the J/109's comfort ratio?

The J/109 has a Ted Brewer Comfort Ratio of 28.11. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the J/109 safe for offshore sailing?

The J/109 has a Capsize Screening Formula value of 1.63. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the J/109?

The theoretical hull speed of the J/109 is 8.58 knots, calculated from its waterline length.

How much does a J/109 weigh?

The J/109 has a displacement of 11,500 lb and a length overall (LOA) of 35.83 ft.

Who designed the J/109?

The J/109 was designed by Alan Johnstone, first built in 2003.

Resources & Community
⚓ Class Association J/Boats