Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
57.75 ft
J ?
16.75 ft
P ?
61.58 ft
E ?
23.00 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 | 708.2 | 65.8 |
| 100% ForetriangleI × J ÷ 2 | 483.7 | 44.9 |
| 150% GenoaTypical light-air headsail | 725.5 | 67.4 |
| Storm Jib~50% of foretriangle, high-cut | 241.8 | 22.5 |
| Symmetric SpinnakerEstimated from I, J | 1,741.2 | 161.8 |
| Total Working Sail AreaMain + 100% foretriangle | 1,191.8 | 110.7 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Fractional Sloop · Reichel Pugh Yacht Design design
Performance Ratios
How the 1D 48 carries its sail relative to its displacement.
SA/D Ratio
27.9
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
49%
Race-oriented ballast ratio — stiff and powerful.
Typical Sail Inventory
What 1D 48 owners usually carry and what's worth buying used vs. new.
Mainsail 708.2 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 725.5 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~532 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 241.8 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,741 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 1D 48 — Dacron, laminate, and cruising performance tiers.