Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
18.95 ft
J ?
5.54 ft
P ?
19.42 ft
E ?
8.37 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 | 81.3 | 7.6 |
| 100% ForetriangleI × J ÷ 2 | 52.5 | 4.9 |
| 150% GenoaTypical light-air headsail | 78.7 | 7.3 |
| Storm Jib~50% of foretriangle, high-cut | 26.2 | 2.4 |
| Symmetric SpinnakerEstimated from I, J | 189.0 | 17.6 |
| Total Working Sail AreaMain + 100% foretriangle | 133.8 | 12.4 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Fractional Sloop · Hunter Design Team design
Performance Ratios
How the Hunter 170 carries its sail relative to its displacement.
SA/D Ratio
39.3
Performance-oriented — carries a lot of sail for its weight.
Mast Height (above DWL)
25.5 ft
Clears the 65 ft ICW fixed-bridge standard with room to spare.
Ballast Ratio
—
Ballast ratio not published.
Typical Sail Inventory
What Hunter 170 owners usually carry and what's worth buying used vs. new.
Mainsail 81.3 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 78.7 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~58 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 26.2 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~189 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 Hunter 170 — Dacron, laminate, and cruising performance tiers.