Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
46.11 ft
J ?
14.00 ft
P ?
50.20 ft
E ?
16.90 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 | 424.2 | 39.4 |
| 100% ForetriangleI × J ÷ 2 | 322.8 | 30.0 |
| 150% GenoaTypical light-air headsail | 484.2 | 45.0 |
| Storm Jib~50% of foretriangle, high-cut | 161.4 | 15.0 |
| Symmetric SpinnakerEstimated from I, J | 1,162.0 | 108.0 |
| Total Working Sail AreaMain + 100% foretriangle | 747.0 | 69.4 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Fractional Sloop · Peter Norlin design
Performance Ratios
How the Gambler 37 carries its sail relative to its displacement.
SA/D Ratio
23.2
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
47%
Race-oriented ballast ratio — stiff and powerful.
Typical Sail Inventory
What Gambler 37 owners usually carry and what's worth buying used vs. new.
Mainsail 424.2 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 484.2 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~355 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 161.4 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,162 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 Gambler 37 — Dacron, laminate, and cruising performance tiers.