Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
36.50 ft
J ?
12.24 ft
P ?
30.54 ft
E ?
12.04 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 | 183.9 | 17.1 |
| 100% ForetriangleI × J ÷ 2 | 223.4 | 20.8 |
| 150% GenoaTypical light-air headsail | 335.1 | 31.1 |
| Storm Jib~50% of foretriangle, high-cut | 111.7 | 10.4 |
| Symmetric SpinnakerEstimated from I, J | 804.2 | 74.7 |
| Total Working Sail AreaMain + 100% foretriangle | 407.2 | 37.8 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Bruce King design
Performance Ratios
How the Ericson 29 carries its sail relative to its displacement.
SA/D Ratio
16.8
Moderate — comfortable coastal cruiser, not overcanvassed.
Mast Height (above DWL)
40.4 ft
Clears the 65 ft ICW fixed-bridge standard with room to spare.
Ballast Ratio
46%
Race-oriented ballast ratio — stiff and powerful.
Typical Sail Inventory
What Ericson 29 owners usually carry and what's worth buying used vs. new.
Mainsail 183.9 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 335.1 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~246 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 111.7 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~804 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 Ericson 29 — Dacron, laminate, and cruising performance tiers.