Roberts 36 Sloop/Cutter

Roberts 36 Sloop/Cutter

Description

The Bruce Roberts 36, designed in the 1970s by Australian naval architect Bruce Roberts for owner-builders pursuing affordable bluewater cruising, is a versatile multi-chine sailboat with over 300 examples constructed worldwide in steel, aluminum, fiberglass, or wood, celebrated for its seaworthy hull and customizable layouts ideal for couples or small families on global passages. Measuring 36 feet 9 inches LOD with a 28-foot-9-inch LWL, 11-foot beam, draft of 4 feet (lead ballast) or 4 feet 9 inches (scrap steel), and displacements ranging from 14,750 pounds in fiberglass/wood to 18,000 pounds in steel including 6,275 pounds of ballast, this cutter- or ketch-rigged vessel (with junk rig options) features an approximate sail area of 650-700 square feet across mainsail, genoa, and staysail for balanced performance in 15-30 knot winds, attaining 7-8.5 knot hull speeds with a comfy, predictable helm and minimal weather helm when using the staysail. Powered by a 20- to 33-horsepower diesel auxiliary for 6-knot motoring, its robust construction includes full headroom throughout a spacious interior accommodating 7-9 berths in configurations like twin forepeak, saloon double/single/pilot berths, and aft cabin, with an L-galley, enclosed head (often athwartships near the engine), and ample storage for extended autonomy. Proven in triple circumnavigations and heavy-weather recoveries—including a rollover and dismasting survived on jury rig—the Roberts 36 blends timeless lines with practical durability, remaining a favorite for intrepid sailors valuing self-reliance and comfort on oceans from the Pacific to the Atlantic.

Construction Details

Designer Bruce Roberts-Goodson
Length 36.000 ft
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The standard boat dimensions

i 44.83 ft
j 17.17 ft
p 38.92 ft
e 13 ft
p2 -
e2 -
i2 -
j2 -

Blueprints

Sails

Roberts 36 Sloop/Cutter - MAINSAIL

Luff * 38.92 ft - (11863 mm)
Foot * 13 ft - (3962 mm)
Leech * 40.33 ft - (12293 mm)
Tack Angle * 88 °
Diagonal * 40.6 ft - (12375 mm)
Head (inches) * 6 in - (152 mm)
Area * 261.34 ft²
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Roberts 36 Sloop/Cutter - DRIFTER

Luff * 45.61 ft - (13902 mm)
Foot * 29.74 ft - (9065 mm)
Leech * 40.11 ft - (12226 mm)
Perc LP * 150.03 %
Length Perp * 25.76 ft - (7852 mm)
Deck Angle * 9.03 °
Area * 587.43 ft²
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Roberts 36 Sloop/Cutter - ASYMMETRICAL

Luff 40 ft - (12192 mm)
Foot 24 ft - (7315 mm)
Leech 38 ft - (11582 mm)
Perc LP * 165 %
Area * 720 ft²
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Roberts 36 Sloop/Cutter - ASYMMETRICAL

Luff * 45.61 ft - (13902 mm)
Foot * 28.33 ft - (8635 mm)
Leech * 41.96 ft - (12789 mm)
Perc LP * 165 %
Area * 969 ft²
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Roberts 36 Sloop/Cutter - SPINNAKER

Stays * 45.61 ft - (13902 mm)
MidGirth * 30.91 ft - (9421 mm)
Foot * 30.91 ft - (9421 mm)
Perc LP * 180 %
Area * 1198 ft²
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Roberts 36 Sloop/Cutter - YANKEE

Luff 42.25 ft - (12878 mm)
Foot 18.75 ft - (5715 mm)
Leech 31.5 ft - (9601 mm)
Area * 273.94 ft²
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Roberts 36 Sloop/Cutter - STAYSAIL

Luff 30.5 ft - (9296 mm)
Foot 11.5 ft - (3505 mm)
Leech 29.5 ft - (8992 mm)
Length Perpendicular 11.06 ft - (3371 mm)
Area * 168.66 ft²
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Roberts 36 Sloop/Cutter - STORMJIB

Luff * 26.4 ft - (8047 mm)
Foot * 13.44 ft - (4097 mm)
Leech * 19.05 ft - (5806 mm)
Perc LP * 53.87 %
Length Perp * 9.25 ft - (2819 mm)
Deck Angle * 25.54 °
Area * 122.13 ft²
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Roberts 36 Sloop/Cutter - STORMTRYSAIL

Luff * 14.55 ft - (4435 mm)
Foot * 13.38 ft - (4078 mm)
Leech * 12.13 ft - (3697 mm)
Length Perp * 12.13 ft - (3697 mm)
Tack Angle * -25 °
Area * 76 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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