Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
23.91 ft
J ?
8.00 ft
P ?
25.25 ft
E ?
9.00 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 | 113.6 | 10.6 |
| 100% ForetriangleI × J ÷ 2 | 95.6 | 8.9 |
| 150% GenoaTypical light-air headsail | 143.5 | 13.3 |
| Storm Jib~50% of foretriangle, high-cut | 47.8 | 4.4 |
| Symmetric SpinnakerEstimated from I, J | 344.3 | 32.0 |
| Total Working Sail AreaMain + 100% foretriangle | 209.3 | 19.4 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Fractional Sloop · Ted Hood design
Performance Ratios
How the Amf 2100 carries its sail relative to its displacement.
SA/D Ratio
19.8
Powerful cruiser/racer — quick in light air, reef early in a blow.
Mast Height (above DWL)
27.6 ft
Clears the 65 ft ICW fixed-bridge standard with room to spare.
Ballast Ratio
39%
Stiff enough to carry a 150% genoa comfortably into moderate breeze.
Typical Sail Inventory
What Amf 2100 owners usually carry and what's worth buying used vs. new.
Mainsail 113.6 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 143.5 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~105 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 47.8 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~344 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 Amf 2100 — Dacron, laminate, and cruising performance tiers.