Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
38.90 ft
J ?
11.50 ft
P ?
40.83 ft
E ?
15.54 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 | 317.2 | 29.5 |
| 100% ForetriangleI × J ÷ 2 | 223.7 | 20.8 |
| 150% GenoaTypical light-air headsail | 335.5 | 31.2 |
| Storm Jib~50% of foretriangle, high-cut | 111.8 | 10.4 |
| Symmetric SpinnakerEstimated from I, J | 805.2 | 74.8 |
| Total Working Sail AreaMain + 100% foretriangle | 540.9 | 50.3 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Fractional Sloop · G. Henderson design
Performance Ratios
How the Sr 33 carries its sail relative to its displacement.
SA/D Ratio
28.3
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 Sr 33 owners usually carry and what's worth buying used vs. new.
Mainsail 317.2 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 335.5 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~246 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 111.8 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~805 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 Sr 33 — Dacron, laminate, and cruising performance tiers.