Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
48.39 ft
J ?
13.91 ft
P ?
46.59 ft
E ?
16.24 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 | 378.3 | 35.1 |
| 100% ForetriangleI × J ÷ 2 | 336.6 | 31.3 |
| 150% GenoaTypical light-air headsail | 504.8 | 46.9 |
| Storm Jib~50% of foretriangle, high-cut | 168.3 | 15.6 |
| Symmetric SpinnakerEstimated from I, J | 1,211.6 | 112.6 |
| Total Working Sail AreaMain + 100% foretriangle | 714.9 | 66.4 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Fractional Sloop · Judel/Vrolijk design
Performance Ratios
How the Dehler 36 Sq carries its sail relative to its displacement.
SA/D Ratio
20.3
Powerful cruiser/racer — quick in light air, reef early in a blow.
Mast Height (above DWL)
58.8 ft
Clears the 65 ft ICW fixed-bridge standard at normal tide.
Ballast Ratio
37%
Typical cruising ballast — balanced stability underway.
Typical Sail Inventory
What Dehler 36 Sq owners usually carry and what's worth buying used vs. new.
Mainsail 378.3 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 504.8 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~370 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 168.3 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,212 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 Dehler 36 Sq — Dacron, laminate, and cruising performance tiers.