Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
26.71 ft
J ?
39.63 ft
P ?
— ft
E ?
— 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 | — | — |
| 100% ForetriangleI × J ÷ 2 | 529.3 | 49.2 |
| 150% GenoaTypical light-air headsail | 793.9 | 73.8 |
| Storm Jib~50% of foretriangle, high-cut | 264.6 | 24.6 |
| Symmetric SpinnakerEstimated from I, J | 1,905.3 | 177.0 |
| Total Working Sail AreaMain + 100% foretriangle | — | — |
Foretriangle Diagram
Scale diagram unavailable — I, J, P, and E measurements are not all published for the Beneteau 347.
Performance Ratios
How the Beneteau 347 carries its sail relative to its displacement.
SA/D Ratio
26.7
Performance-oriented — carries a lot of sail for its weight.
Mast Height (above DWL)
51.8 ft
Clears the 65 ft ICW fixed-bridge standard with room to spare.
Ballast Ratio
38%
Stiff enough to carry a 150% genoa comfortably into moderate breeze.
Typical Sail Inventory
What Beneteau 347 owners usually carry and what's worth buying used vs. new.
Mainsail — ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 793.9 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~582 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 264.6 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,905 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 Beneteau 347 — Dacron, laminate, and cruising performance tiers.