Roberts 493

Roberts 493

Description

The Bruce Roberts 493 is a robust, owner-buildable bluewater cruising ketch designed by Australian naval architect Bruce Roberts in the 1980s, renowned for its seaworthy multi-chine fiberglass hull and versatility in long-distance voyages, with over a dozen examples constructed worldwide as custom one-offs emphasizing durability and comfort for couples or small families. Measuring 49 feet LOA with a 40-foot LWL, 14-foot-1-inch beam, 6-foot-10-inch draft on a long fin keel, and a displacement of 39,000 pounds including 16,000 pounds of external ballast, this cutter-rigged ketch offers a sail area of 1,055 square feet across mainsail, mizzen, genoa, and staysail for balanced performance in 20-40 knot winds, achieving 7-9 knot hull speeds with minimal weather helm, powered by a reliable 40- to 110-horsepower diesel auxiliary like the Yanmar 4JH series. Its classic lines feature a canoe stern, moderate sheer, and teak accents on a hand-laid GRP hull with foam core options, providing 6-foot-6-inch headroom in a spacious interior layout including an L-shaped galley, U-shaped dinette, double aft cabin, forward V-berth, large head with shower, and ample storage alongside 200 gallons of fuel and 400 gallons of water tanks for extended autonomy. Proven in circumnavigations and Caribbean charters, as seen in well-equipped 1990s builds like those auctioned in Europe, the Roberts 493 blends timeless aesthetics with practical seaworthiness, making it a enduring favorite for serious offshore adventurers seeking self-sufficiency without sacrificing livability.

Construction Details

Designer Bruce Roberts-Goodson
Length 49.000 ft
LOA 34.416 ft
LWL 28.750 ft
Beam 11.583 ft
Max Draft 5.750 ft
Min Draft 4.250 ft
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The standard boat dimensions

i 55 ft
j 18.17 ft
p 49 ft
e 15.75 ft
p2 33.25 ft
e2 10.50 ft
i2 -
j2 -

Sails

Roberts 493 - MAINSAIL

Luff * 49 ft - (14935 mm)
Foot * 15.75 ft - (4801 mm)
Leech * 50.79 ft - (15481 mm)
Tack Angle * 87.99 °
Diagonal * 50.94 ft - (15527 mm)
Head (inches) * 6 in - (152 mm)
Area 385.48 ft²
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Roberts 493 - JIBSAIL

Luff * 46.34 ft - (14124 mm)
Foot * 24.2 ft - (7376 mm)
Leech * 40.03 ft - (12201 mm)
Percentage LP * 115 %
Length Perpendicular * 20.9 ft - (6370 mm)
Deck Angle * 12 °
Area 484.26 ft²
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Roberts 493 - GENOA

Luff * 55.03 ft - (16773 mm)
Foot * 29.45 ft - (8976 mm)
Leech * 51.64 ft - (15740 mm)
Percentage LP * 150 %
Length Perpendicular * 27.26 ft - (8309 mm)
Deck Angle * 4 °
Area 749.82 ft²
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Roberts 493 - SPINNAKER

Stays * 55.03 ft - (16773 mm)
MidGirth * 32.71 ft - (9970 mm)
Foot * 32.71 ft - (9970 mm)
Perc LP * 180 %
Area 1530.03 ft²
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Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.

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