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Sailboat Specifications

J9

Fractional Sloop · Fin W/Spade Rudder

Designed by Alan Johnstone · Built by J Boats · First built 2021

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LOA 28.00 ft  ·  Beam 8.60 ft  ·  Displacement 4,250.00 lb  ·  Sail Area 449.00 ft²  ·  Fractional Sloop  ·  Fin W/Spade Rudder
About the J9 Sailboat

Launched in 2021, this newest addition to the J Boats family represents a modern take on performance-oriented daysailing and coastal cruising. Designed by Alan Johnstone, the J9 embodies the builder's decades-long commitment to creating fast, responsive sailboats that prioritize sailing pleasure over accommodation space. With a fin keel and spade rudder configuration paired with a fractional sloop rig, this 28-footer delivers the crisp handling characteristics that have become synonymous with the J Boats brand. The boat's moderate displacement of 4,250 pounds strikes an effective balance between stability and performance, while the generous sail area ensures lively sailing in light to moderate conditions. The J9's design priorities clearly favor sailing performance over extended cruising amenities, making it an excellent choice for day sailing, club racing, and coastal adventures. The low comfort ratio indicates this boat was conceived for active sailing rather than overnight accommodation, though weekend trips remain certainly feasible. Built with fiberglass construction and featuring modern hull lines, the J9 continues J Boats' tradition of creating accessible performance sailboats that appeal to sailors seeking an engaging, responsive sailing experience without the complexity of larger racing machines.

Dimensions & Specifications
LOA (Length Overall) 28.00 ft / 8.53 m
LWL (Waterline Length) 25.40 ft / 7.74 m
Beam 8.60 ft / 2.62 m
Max Draft 4.90 ft / 1.49 m
Displacement 4,250.00 lb / 1,928 kg
Ballast Type Lead
Sail Area (Reported) 449.00 ft² / 41.71 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Alan Johnstone
Builder J Boats
First Built 2021
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Frequently Asked Questions

What is the J9's sail area to displacement ratio?

The J9 has a Sail Area to Displacement ratio (SA/D) of 27.46. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the J9's comfort ratio?

The J9 has a Ted Brewer Comfort Ratio of 14.28. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the J9 safe for offshore sailing?

The J9 has a Capsize Screening Formula value of 2.13. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the J9?

The theoretical hull speed of the J9 is 6.75 kn knots, calculated from its waterline length.

How much does a J9 weigh?

The J9 has a displacement of 4,250.00 lb and a length overall (LOA) of 28.00 ft.

Who designed the J9?

The J9 was designed by Alan Johnstone, first built in 2021.