Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
42.50 ft
J ?
17.67 ft
P ?
37.58 ft
E ?
12.17 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 | 228.7 | 21.2 |
| 100% ForetriangleI × J ÷ 2 | 375.5 | 34.9 |
| 150% GenoaTypical light-air headsail | 563.2 | 52.3 |
| Storm Jib~50% of foretriangle, high-cut | 187.7 | 17.4 |
| Symmetric SpinnakerEstimated from I, J | 1,351.8 | 125.6 |
| Total Working Sail AreaMain + 100% foretriangle | 604.2 | 56.1 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Bob Johnson design
Performance Ratios
How the Packet Cat 35 Island Packet carries its sail relative to its displacement.
SA/D Ratio
—
Sail Area / Displacement ratio not published.
Mast Height (above DWL)
50.0 ft
Clears the 65 ft ICW fixed-bridge standard with room to spare.
Ballast Ratio
—
Ballast ratio not published.
Typical Sail Inventory
What Packet Cat 35 Island Packet owners usually carry and what's worth buying used vs. new.
Mainsail 228.7 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 563.2 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~413 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 187.7 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,352 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 Packet Cat 35 Island Packet — Dacron, laminate, and cruising performance tiers.