Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
17.55 ft
J ?
11.29 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 | 99.1 | 9.2 |
| 150% GenoaTypical light-air headsail | 148.6 | 13.8 |
| Storm Jib~50% of foretriangle, high-cut | 49.5 | 4.6 |
| Symmetric SpinnakerEstimated from I, J | 356.7 | 33.1 |
| Total Working Sail AreaMain + 100% foretriangle | — | — |
Foretriangle Diagram
Scale diagram unavailable — I, J, P, and E measurements are not all published for the First 317 Beneteau.
Performance Ratios
How the First 317 Beneteau carries its sail relative to its displacement.
SA/D Ratio
17.6
Moderate — comfortable coastal cruiser, not overcanvassed.
Mast Height (above DWL)
— ft
Air draft not published — measure yours before any bridge transit.
Ballast Ratio
27%
Light ballast — tends to be tender; reef earlier.
Typical Sail Inventory
What First 317 Beneteau 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 148.6 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~109 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 49.5 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~357 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 317 Beneteau — Dacron, laminate, and cruising performance tiers.