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Sailboat Specifications

J/70

Fractional Sloop · Fin W/Bulb & Spade Rudder

Designed by Alan Johnstone · First built 2012

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LOA 22.75 ft  ·  Beam 8.50 ft  ·  Displacement 2,050 lb  ·  Sail Area 256 ft²  ·  Fractional Sloop  ·  Fin W/Bulb & Spade Rudder
Dimensions & Specifications
LOA (Length Overall) 22.75 ft / 6.93 m
LWL (Waterline Length) 19.17 ft / 5.84 m
Beam 8.50 ft / 2.59 m
Max Draft 4.17 ft / 1.27 m
Displacement 2,050 lb / 930 kg
Ballast 900 lb / 408 kg
Sail Area (Reported) 256 ft² / 23.78 m²
Design & Construction
Hull Type Fin w/bulb & spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Alan Johnstone
First Built 2012
Number Built 1500
Related Sailboats J70 · J/22 · F 22 · Star International · Deltania 22 S
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Frequently Asked Questions

What is the J/70's sail area to displacement ratio?

The J/70 has a Sail Area to Displacement ratio (SA/D) of 28.08. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the J/70's comfort ratio?

The J/70 has a Ted Brewer Comfort Ratio of 13.98. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the J/70 safe for offshore sailing?

The J/70 has a Capsize Screening Formula value of 1.89. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the J/70?

The theoretical hull speed of the J/70 is 5.86 knots, calculated from its waterline length.

How much does a J/70 weigh?

The J/70 has a displacement of 2,050 lb and a length overall (LOA) of 22.75 ft.

Who designed the J/70?

The J/70 was designed by Alan Johnstone, first built in 2012.

Resources & Community
⚓ Class Association International J/70 Class Association