Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
38.17 ft
J ?
12.87 ft
P ?
31.70 ft
E ?
16.38 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 | 259.6 | 24.1 |
| 100% ForetriangleI × J ÷ 2 | 245.6 | 22.8 |
| 150% GenoaTypical light-air headsail | 368.4 | 34.2 |
| Storm Jib~50% of foretriangle, high-cut | 122.8 | 11.4 |
| Symmetric SpinnakerEstimated from I, J | 884.2 | 82.1 |
| Total Working Sail AreaMain + 100% foretriangle | 505.2 | 46.9 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Richard C. Lazzara design
Performance Ratios
How the Gulfstar 36 Ms Ph carries its sail relative to its displacement.
SA/D Ratio
13.3
Heavy and modestly canvassed — a comfortable cruiser, not fast.
Mast Height (above DWL)
43.0 ft
Clears the 65 ft ICW fixed-bridge standard with room to spare.
Ballast Ratio
—
Ballast ratio not published.
Typical Sail Inventory
What Gulfstar 36 Ms Ph owners usually carry and what's worth buying used vs. new.
Mainsail 259.6 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 368.4 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~270 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 122.8 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~884 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 Gulfstar 36 Ms Ph — Dacron, laminate, and cruising performance tiers.