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.
The standard boat dimensions
| i | 44.83 ft |
|---|---|
| j | 17.17 ft |
| p | 38.92 ft |
| e | 13 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 44.83 ft | 17.17 ft | 38.92 ft | 13 ft | - | - | - | - |
Documents
Blueprints2>
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 |
| Edit in Calculator | |
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.