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Sailboat Specifications

Gloucester 18

Fractional Sloop · Centerboard Dinghy

Designed by Rod Macalpine-Downie/Dick Gibbs · Built by Gloucester Yachts (Usa) · First built 1985

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LOA 18.00 ft  ·  Beam 6.00 ft  ·  Displacement 500.00 lb  ·  Sail Area 175.00 ft²  ·  Fractional Sloop  ·  Centerboard Dinghy
About the Gloucester 18 Sailboat

Designed by the accomplished team of Rod Macalpine-Downie and Dick Gibbs, this compact centerboard dinghy represents thoughtful engineering for small boat sailing. First launched in 1985 by Gloucester Yachts, the design combines fiberglass and wood construction in an 18-foot package that prioritizes performance and handling over accommodation. With a fractional sloop rig carrying 175 square feet of sail area on a lightweight 500-pound displacement, this boat delivers spirited performance characteristics ideal for day sailing, sailing instruction, and small boat racing. The generous sail area to displacement ratio of 44.51 indicates excellent light-air performance and responsive handling that will satisfy experienced sailors while remaining manageable for newcomers to the sport. The 3.83-foot draft centerboard configuration allows access to shallow waters while providing adequate lateral resistance when sailing to windward. Her 6-foot beam strikes an effective balance between stability and trailering convenience, making her well-suited for sailors seeking an easily transported boat for exploring different sailing venues. The low comfort ratio of 4.16 and capsize screening value of 3.03 clearly identify this as a day sailor designed for protected waters rather than overnight cruising, emphasizing her role as a pure sailing machine focused on performance and boat handling skills development.

Dimensions & Specifications
LOA (Length Overall) 18.00 ft / 5.49 m
LWL (Waterline Length) 16.67 ft / 5.08 m
Beam 6.00 ft / 1.83 m
Max Draft 3.83 ft / 1.17 m
Min Draft 0.58 ft / 0.18 m
Displacement 500.00 lb / 227 kg
Sail Area (Reported) 175.00 ft² / 16.26 m²
Design & Construction
Hull Type Centerboard Dinghy
Rigging Type Fractional Sloop
Construction FG Wood
Designer Rod Macalpine-Downie/Dick Gibbs
Builder Gloucester Yachts (USA)
First Built 1985
Associations Buccaneer 18 Class Association
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Frequently Asked Questions

What is the Gloucester 18's sail area to displacement ratio?

The Gloucester 18 has a Sail Area to Displacement ratio (SA/D) of 44.51. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Gloucester 18's comfort ratio?

The Gloucester 18 has a Ted Brewer Comfort Ratio of 4.16. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Gloucester 18 safe for offshore sailing?

The Gloucester 18 has a Capsize Screening Formula value of 3.03. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Gloucester 18?

The theoretical hull speed of the Gloucester 18 is 5.47 kn knots, calculated from its waterline length.

How much does a Gloucester 18 weigh?

The Gloucester 18 has a displacement of 500.00 lb and a length overall (LOA) of 18.00 ft.

Who designed the Gloucester 18?

The Gloucester 18 was designed by Rod Macalpine-Downie/Dick Gibbs, first built in 1985.