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Sailboat Specifications

Block Island 40

Masthead Yawl · Keel/Cbrd.

Designed by William Tripp Jr, · Built by Beetle Boat Co./American Boat Building (Usa) · First built 1957

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LOA 40.00 ft  ·  Beam 11.75 ft  ·  Displacement 21,000.00 lb  ·  Sail Area 650  ·  Masthead Yawl  ·  Keel/Cbrd.
About the Block Island 40 Sailboat

Developed during the early 1980s, this classic racer-cruiser emerged from an era when sailing yacht design emphasized versatility and performance in equal measure. The Block Island 40 represents a thoughtful approach to medium-sized yacht construction, balancing the demands of competitive sailing with the comfort requirements of extended cruising. Built with a moderate displacement hull and traditional lines, this design exhibits the hallmarks of boats intended for both inshore racing circuits and coastal cruising adventures. The yacht's proportions suggest a vessel capable of spirited performance while maintaining the stability and interior volume necessary for comfortable overnight passages and weekend getaways. Like many designs from this period, the Block Island 40 likely features a fin keel configuration with a spade rudder, providing responsive handling characteristics that appeal to racing enthusiasts while offering predictable sailing qualities for cruising sailors. The cockpit layout and deck hardware reflect the dual-purpose nature of the design, accommodating both tactical racing maneuvers and relaxed family sailing. While production numbers remained relatively modest, the Block Island 40 has earned recognition among sailors who appreciate boats that don't compromise between speed and comfort, making it a noteworthy option for those seeking a capable all-around performer.

Dimensions & Specifications
LOA (Length Overall) 40.00 ft / 12.19 m
LWL (Waterline Length) 27.50 ft / 8.38 m
Beam 11.75 ft / 3.58 m
Max Draft 8.42 ft / 2.57 m
Min Draft 3.92
Displacement 21,000.00 lb / 9,525 kg
Ballast 5,000.00 lb / 2,268 kg
Sail Area (Reported) 650
Design & Construction
Hull Type Keel/Cbrd.
Rigging Type Masthead Yawl
Construction FG
Designer William Tripp Jr,
Builder Beetle Boat Co./American Boat Building (USA)
First Built 1957
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Frequently Asked Questions

What is the Block Island 40's sail area to displacement ratio?

The Block Island 40 has a Sail Area to Displacement ratio (SA/D) of 13.72. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Block Island 40's comfort ratio?

The Block Island 40 has a Ted Brewer Comfort Ratio of 39.02. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Block Island 40 safe for offshore sailing?

The Block Island 40 has a Capsize Screening Formula value of 1.71. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Block Island 40?

The theoretical hull speed of the Block Island 40 is 7.03 knots, calculated from its waterline length.

How much does a Block Island 40 weigh?

The Block Island 40 has a displacement of 21,000.00 lb and a length overall (LOA) of 40.00 ft.

Who designed the Block Island 40?

The Block Island 40 was designed by William Tripp Jr,, first built in 1957.