Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
49.41 ft
J ?
13.93 ft
P ?
43.24 ft
E ?
15.46 ft
Sail Area Breakdown
Calculated from rigging dimensions. Use these as your starting point when ordering a new suit.
| Sail | Area (ft²) | Area (m²) |
|---|---|---|
| MainsailP × E ÷ 2 | 334.2 | 31.1 |
| 100% ForetriangleI × J ÷ 2 | 344.1 | 32.0 |
| 150% GenoaTypical light-air headsail | 516.2 | 48.0 |
| Storm Jib~50% of foretriangle, high-cut | 172.1 | 16.0 |
| Symmetric SpinnakerEstimated from I, J | 1,238.9 | 115.1 |
| Total Working Sail AreaMain + 100% foretriangle | 678.4 | 63.0 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Murray Burns Dovell design
Performance Ratios
How the Sydney 36 carries its sail relative to its displacement.
SA/D Ratio
22.7
Performance-oriented — carries a lot of sail for its weight.
Mast Height (above DWL)
— ft
Air draft not published — measure yours before any bridge transit.
Ballast Ratio
—
Ballast ratio not published.
Typical Sail Inventory
What Sydney 36 owners usually carry and what's worth buying used vs. new.
Mainsail 334.2 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 516.2 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~379 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 172.1 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,239 ft²
Popular downwind upgrade — easier than symmetric for shorthanded sailing.
Optional
Replacement Cost Estimator
Get a rough price range for a new mainsail and genoa for the Sydney 36 — Dacron, laminate, and cruising performance tiers.