Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
68.00 ft
J ?
27.30 ft
P ?
38.50 ft
E ?
19.25 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 | 370.6 | 34.4 |
| 100% ForetriangleI × J ÷ 2 | 928.2 | 86.2 |
| 150% GenoaTypical light-air headsail | 1,392.3 | 129.3 |
| Storm Jib~50% of foretriangle, high-cut | 464.1 | 43.1 |
| Symmetric SpinnakerEstimated from I, J | 3,341.5 | 310.4 |
| Total Working Sail AreaMain + 100% foretriangle | 1,298.8 | 120.7 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Staysail Ketch · Robert Perry design
Performance Ratios
How the Scorpio 72 carries its sail relative to its displacement.
SA/D Ratio
10.7
Heavy and modestly canvassed — a comfortable cruiser, not fast.
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 Scorpio 72 owners usually carry and what's worth buying used vs. new.
Mainsail 370.6 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 1,392.3 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~1,021 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 464.1 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~3,342 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 Scorpio 72 — Dacron, laminate, and cruising performance tiers.