Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
36.20 ft
J ?
10.75 ft
P ?
30.00 ft
E ?
9.70 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 | 145.5 | 13.5 |
| 100% ForetriangleI × J ÷ 2 | 194.6 | 18.1 |
| 150% GenoaTypical light-air headsail | 291.9 | 27.1 |
| Storm Jib~50% of foretriangle, high-cut | 97.3 | 9.0 |
| Symmetric SpinnakerEstimated from I, J | 700.5 | 65.1 |
| Total Working Sail AreaMain + 100% foretriangle | 340.1 | 31.6 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Raymond Wall design
Performance Ratios
How the Cs 27 carries its sail relative to its displacement.
SA/D Ratio
21.8
Powerful cruiser/racer — quick in light air, reef early in a blow.
Mast Height (above DWL)
37.8 ft
Clears the 65 ft ICW fixed-bridge standard with room to spare.
Ballast Ratio
39%
Stiff enough to carry a 150% genoa comfortably into moderate breeze.
Typical Sail Inventory
What Cs 27 owners usually carry and what's worth buying used vs. new.
Mainsail 145.5 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 291.9 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~214 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 97.3 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~700 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 Cs 27 — Dacron, laminate, and cruising performance tiers.