Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
19.04 ft
J ?
19.78 ft
P ?
657.00 ft
E ?
249.37 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 | 81,918.0 | 7,610.4 |
| 100% ForetriangleI × J ÷ 2 | 188.3 | 17.5 |
| 150% GenoaTypical light-air headsail | 282.5 | 26.2 |
| Storm Jib~50% of foretriangle, high-cut | 94.2 | 8.7 |
| Symmetric SpinnakerEstimated from I, J | 677.9 | 63.0 |
| Total Working Sail AreaMain + 100% foretriangle | 82,106.4 | 7,627.9 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Dick Zaal design
Performance Ratios
How the Contest 35S carries its sail relative to its displacement.
SA/D Ratio
19.0
Powerful cruiser/racer — quick in light air, reef early in a blow.
Mast Height (above DWL)
— ft
Air draft not published — measure yours before any bridge transit.
Ballast Ratio
42%
Stiff enough to carry a 150% genoa comfortably into moderate breeze.
Typical Sail Inventory
What Contest 35S owners usually carry and what's worth buying used vs. new.
Mainsail 81,918.0 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 282.5 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~207 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 94.2 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~678 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 Contest 35S — Dacron, laminate, and cruising performance tiers.