Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
43.40 ft
J ?
14.00 ft
P ?
44.40 ft
E ?
15.70 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 | 348.5 | 32.4 |
| 100% ForetriangleI × J ÷ 2 | 303.8 | 28.2 |
| 150% GenoaTypical light-air headsail | 455.7 | 42.3 |
| Storm Jib~50% of foretriangle, high-cut | 151.9 | 14.1 |
| Symmetric SpinnakerEstimated from I, J | 1,093.7 | 101.6 |
| Total Working Sail AreaMain + 100% foretriangle | 652.3 | 60.6 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Yawl · Carl Schumacher design
Performance Ratios
How the Alerion Express 38 carries its sail relative to its displacement.
SA/D Ratio
23.5
Performance-oriented — carries a lot of sail for its weight.
Mast Height (above DWL)
56.3 ft
Clears the 65 ft ICW fixed-bridge standard at normal tide.
Ballast Ratio
46%
Race-oriented ballast ratio — stiff and powerful.
Typical Sail Inventory
What Alerion Express 38 owners usually carry and what's worth buying used vs. new.
Mainsail 348.5 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 455.7 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~334 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 151.9 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,094 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 Alerion Express 38 — Dacron, laminate, and cruising performance tiers.