Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
26.08 ft
J ?
8.25 ft
P ?
22.50 ft
E ?
7.25 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 | 81.6 | 7.6 |
| 100% ForetriangleI × J ÷ 2 | 107.6 | 10.0 |
| 150% GenoaTypical light-air headsail | 161.4 | 15.0 |
| Storm Jib~50% of foretriangle, high-cut | 53.8 | 5.0 |
| Symmetric SpinnakerEstimated from I, J | 387.3 | 36.0 |
| Total Working Sail AreaMain + 100% foretriangle | 189.1 | 17.6 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Ken Fickett design
Performance Ratios
How the Mirage 55 carries its sail relative to its displacement.
SA/D Ratio
27.0
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
27%
Light ballast — tends to be tender; reef earlier.
Typical Sail Inventory
What Mirage 55 owners usually carry and what's worth buying used vs. new.
Mainsail 81.6 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 161.4 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~118 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 53.8 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~387 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 Mirage 55 — Dacron, laminate, and cruising performance tiers.