Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
82.02 ft
J ?
25.16 ft
P ?
79.17 ft
E ?
25.59 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 | 1,013.0 | 94.1 |
| 100% ForetriangleI × J ÷ 2 | 1,031.8 | 95.9 |
| 150% GenoaTypical light-air headsail | 1,547.7 | 143.8 |
| Storm Jib~50% of foretriangle, high-cut | 515.9 | 47.9 |
| Symmetric SpinnakerEstimated from I, J | 3,714.5 | 345.1 |
| Total Working Sail AreaMain + 100% foretriangle | 2,044.8 | 190.0 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Cutter · Philippe Briand/Jean-Marc Platon design
Performance Ratios
How the Cnb 66 carries its sail relative to its displacement.
SA/D Ratio
22.2
Performance-oriented — carries a lot of sail for its weight.
Mast Height (above DWL)
94.4 ft
Air draft exceeds the 65 ft ICW standard — plan accordingly.
Ballast Ratio
30%
Typical cruising ballast — balanced stability underway.
Typical Sail Inventory
What Cnb 66 owners usually carry and what's worth buying used vs. new.
Mainsail 1,013.0 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 1,547.7 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~1,135 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 515.9 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~3,715 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 Cnb 66 — Dacron, laminate, and cruising performance tiers.