Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
53.15 ft
J ?
15.44 ft
P ?
54.78 ft
E ?
19.35 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 | 530.0 | 49.2 |
| 100% ForetriangleI × J ÷ 2 | 410.3 | 38.1 |
| 150% GenoaTypical light-air headsail | 615.5 | 57.2 |
| Storm Jib~50% of foretriangle, high-cut | 205.2 | 19.1 |
| Symmetric SpinnakerEstimated from I, J | 1,477.1 | 137.2 |
| Total Working Sail AreaMain + 100% foretriangle | 940.3 | 87.4 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Fractional Sloop · Bruce Farr design
Performance Ratios
How the Farr 40 One Design carries its sail relative to its displacement.
SA/D Ratio
36.2
Performance-oriented — carries a lot of sail for its weight.
Mast Height (above DWL)
— ft
Air draft not published — measure yours before any bridge transit.
Ballast Ratio
46%
Race-oriented ballast ratio — stiff and powerful.
Typical Sail Inventory
What Farr 40 One Design owners usually carry and what's worth buying used vs. new.
Mainsail 530.0 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 615.5 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~451 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 205.2 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,477 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 Farr 40 One Design — Dacron, laminate, and cruising performance tiers.