Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
55.84 ft
J ?
21.42 ft
P ?
52.92 ft
E ?
18.73 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 | 495.6 | 46.0 |
| 100% ForetriangleI × J ÷ 2 | 598.0 | 55.6 |
| 150% GenoaTypical light-air headsail | 897.1 | 83.3 |
| Storm Jib~50% of foretriangle, high-cut | 299.0 | 27.8 |
| Symmetric SpinnakerEstimated from I, J | 2,153.0 | 200.0 |
| Total Working Sail AreaMain + 100% foretriangle | 1,093.6 | 101.6 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Frac. Sloop (Rotating Spar) · Morrelli & Melvin design
Performance Ratios
How the Rapido 40 carries its sail relative to its displacement.
SA/D Ratio
—
Sail Area / Displacement ratio not published.
Mast Height (above DWL)
63.2 ft
Tight on the 65 ft ICW standard — check tide before transiting.
Ballast Ratio
—
Ballast ratio not published.
Typical Sail Inventory
What Rapido 40 owners usually carry and what's worth buying used vs. new.
Mainsail 495.6 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 897.1 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~658 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 299.0 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~2,153 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 Rapido 40 — Dacron, laminate, and cruising performance tiers.