Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
51.61 ft
J ?
14.47 ft
P ?
48.85 ft
E ?
17.71 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 | 432.6 | 40.2 |
| 100% ForetriangleI × J ÷ 2 | 373.4 | 34.7 |
| 150% GenoaTypical light-air headsail | 560.1 | 52.0 |
| Storm Jib~50% of foretriangle, high-cut | 186.7 | 17.3 |
| Symmetric SpinnakerEstimated from I, J | 1,344.2 | 124.9 |
| Total Working Sail AreaMain + 100% foretriangle | 806.0 | 74.9 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Fractional Sloop · Bruce Farr design
Performance Ratios
How the First 407 Beneteau carries its sail relative to its displacement.
SA/D Ratio
21.1
Powerful cruiser/racer — quick in light air, reef early in a blow.
Mast Height (above DWL)
— ft
Air draft not published — measure yours before any bridge transit.
Ballast Ratio
39%
Stiff enough to carry a 150% genoa comfortably into moderate breeze.
Typical Sail Inventory
What First 407 Beneteau owners usually carry and what's worth buying used vs. new.
Mainsail 432.6 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 560.1 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~411 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 186.7 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,344 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 First 407 Beneteau — Dacron, laminate, and cruising performance tiers.