Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
49.00 ft
J ?
17.20 ft
P ?
43.42 ft
E ?
19.20 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 | 416.8 | 38.7 |
| 100% ForetriangleI × J ÷ 2 | 421.4 | 39.1 |
| 150% GenoaTypical light-air headsail | 632.1 | 58.7 |
| Storm Jib~50% of foretriangle, high-cut | 210.7 | 19.6 |
| Symmetric SpinnakerEstimated from I, J | 1,517.0 | 140.9 |
| Total Working Sail AreaMain + 100% foretriangle | 838.2 | 77.9 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · William Lapworth design
Performance Ratios
How the Islander 44 carries its sail relative to its displacement.
SA/D Ratio
16.4
Moderate — comfortable coastal cruiser, not overcanvassed.
Mast Height (above DWL)
54.0 ft
Clears the 65 ft ICW fixed-bridge standard with room to spare.
Ballast Ratio
36%
Typical cruising ballast — balanced stability underway.
Typical Sail Inventory
What Islander 44 owners usually carry and what's worth buying used vs. new.
Mainsail 416.8 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 632.1 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~464 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 210.7 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,517 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 Islander 44 — Dacron, laminate, and cruising performance tiers.