Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
47.50 ft
J ?
16.50 ft
P ?
42.30 ft
E ?
18.90 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 | 399.7 | 37.1 |
| 100% ForetriangleI × J ÷ 2 | 391.9 | 36.4 |
| 150% GenoaTypical light-air headsail | 587.8 | 54.6 |
| Storm Jib~50% of foretriangle, high-cut | 195.9 | 18.2 |
| Symmetric SpinnakerEstimated from I, J | 1,410.8 | 131.1 |
| Total Working Sail AreaMain + 100% foretriangle | 791.6 | 73.5 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Ketch · William Garden design
Performance Ratios
How the Ct 41 carries its sail relative to its displacement.
SA/D Ratio
14.0
Heavy and modestly canvassed — a comfortable cruiser, not fast.
Mast Height (above DWL)
— ft
Air draft not published — measure yours before any bridge transit.
Ballast Ratio
33%
Typical cruising ballast — balanced stability underway.
Typical Sail Inventory
What Ct 41 owners usually carry and what's worth buying used vs. new.
Mainsail 399.7 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 587.8 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~431 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 195.9 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~1,411 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 Ct 41 — Dacron, laminate, and cruising performance tiers.