Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
25.75 ft
J ?
7.67 ft
P ?
22.25 ft
E ?
10.00 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 | 111.3 | 10.3 |
| 100% ForetriangleI × J ÷ 2 | 98.8 | 9.2 |
| 150% GenoaTypical light-air headsail | 148.1 | 13.8 |
| Storm Jib~50% of foretriangle, high-cut | 49.4 | 4.6 |
| Symmetric SpinnakerEstimated from I, J | 355.5 | 33.0 |
| Total Working Sail AreaMain + 100% foretriangle | 210.0 | 19.5 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Oliver Lee /Chris Butler design
Performance Ratios
How the Achilles 24 carries its sail relative to its displacement.
SA/D Ratio
17.8
Moderate — comfortable coastal cruiser, not overcanvassed.
Mast Height (above DWL)
— ft
Air draft not published — measure yours before any bridge transit.
Ballast Ratio
51%
Race-oriented ballast ratio — stiff and powerful.
Typical Sail Inventory
What Achilles 24 owners usually carry and what's worth buying used vs. new.
Mainsail 111.3 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 148.1 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 49.4 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~356 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 Achilles 24 — Dacron, laminate, and cruising performance tiers.