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Sailboat Specifications

Vineyard 21

Fractional Sloop · Fin Keel

Designed by Erford W. Burt · Built by Martha's Vinyard Shipyard · First built 1934

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LOA 21.00 ft  ·  Beam 5.50 ft  ·  Displacement 2,350.00 lb  ·  Sail Area 200.00 ft²  ·  Fractional Sloop  ·  Fin Keel
About the Vineyard 21 Sailboat

Designed as a nimble and versatile small sailboat, the Vineyard 21 has built a quiet following among sailors who appreciate a capable daysailer with genuine character. Named with an nod to the coastal cruising grounds of New England, this boat feels at home on protected bays, harbors, and nearshore waters where responsive handling and ease of use matter most. With its modest size, the Vineyard 21 is well suited to single-handed or short-handed sailing, making it an appealing choice for sailors who want to spend more time on the water with less effort in preparation and maintenance. Its hull form is generally regarded as well-behaved, offering a stable and predictable platform for newer sailors while still rewarding more experienced hands who want to push the pace on a breezy afternoon. For those researching a first keelboat or a low-maintenance coastal cruiser, the Vineyard 21 represents a practical and enjoyable option. While detailed specification data remains limited, the boat's reputation rests on its approachable sailing experience and suitability for relaxed day sailing in familiar waters.

Dimensions & Specifications
LOA (Length Overall) 21.00 ft / 6.40 m
LWL (Waterline Length) 16.25 ft / 4.95 m
Beam 5.50 ft / 1.68 m
Max Draft 4.00 ft / 1.22 m
Displacement 2,350.00 lb / 1,066 kg
Sail Area (Reported) 200.00 ft² / 18.58 m²
Design & Construction
Hull Type Fin Keel
Rigging Type Fractional Sloop
Construction Wood/FG
Designer Erford W. Burt
Builder Martha's Vinyard Shipyard
First Built 1934
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Frequently Asked Questions

What is the Vineyard 21's sail area to displacement ratio?

The Vineyard 21 has a Sail Area to Displacement ratio (SA/D) of 18.15. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Vineyard 21's comfort ratio?

The Vineyard 21 has a Ted Brewer Comfort Ratio of 21.19. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Vineyard 21 safe for offshore sailing?

The Vineyard 21 has a Capsize Screening Formula value of 1.66. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Vineyard 21?

The theoretical hull speed of the Vineyard 21 is 5.4 knots, calculated from its waterline length.

How much does a Vineyard 21 weigh?

The Vineyard 21 has a displacement of 2,350.00 lb and a length overall (LOA) of 21.00 ft.

Who designed the Vineyard 21?

The Vineyard 21 was designed by Erford W. Burt, first built in 1934.