Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
47.00 ft
J ?
13.75 ft
P ?
41.30 ft
E ?
14.30 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 | 295.3 | 27.4 |
| 100% ForetriangleI × J ÷ 2 | 323.1 | 30.0 |
| 150% GenoaTypical light-air headsail | 484.7 | 45.0 |
| Storm Jib~50% of foretriangle, high-cut | 161.6 | 15.0 |
| Symmetric SpinnakerEstimated from I, J | 1,163.3 | 108.1 |
| Total Working Sail AreaMain + 100% foretriangle | 618.4 | 57.5 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Tim Jackett design
Performance Ratios
How the Tartan 3500 carries its sail relative to its displacement.
SA/D Ratio
19.6
Powerful cruiser/racer — quick in light air, reef early in a blow.
Mast Height (above DWL)
— ft
Air draft not published — measure yours before any bridge transit.
Ballast Ratio
39%
Stiff enough to carry a 150% genoa comfortably into moderate breeze.
Typical Sail Inventory
What Tartan 3500 owners usually carry and what's worth buying used vs. new.
Mainsail 295.3 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 484.7 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~355 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 161.6 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,163 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 Tartan 3500 — Dacron, laminate, and cruising performance tiers.