Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
63.00 ft
J ?
19.50 ft
P ?
57.00 ft
E ?
15.30 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 | 436.1 | 40.5 |
| 100% ForetriangleI × J ÷ 2 | 614.3 | 57.1 |
| 150% GenoaTypical light-air headsail | 921.4 | 85.6 |
| Storm Jib~50% of foretriangle, high-cut | 307.1 | 28.5 |
| Symmetric SpinnakerEstimated from I, J | 2,211.3 | 205.4 |
| Total Working Sail AreaMain + 100% foretriangle | 1,050.3 | 97.6 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · Doug Peterson design
Performance Ratios
How the Choate 48 carries its sail relative to its displacement.
SA/D Ratio
21.2
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
53%
Race-oriented ballast ratio — stiff and powerful.
Typical Sail Inventory
What Choate 48 owners usually carry and what's worth buying used vs. new.
Mainsail 436.1 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 921.4 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~676 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 307.1 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~2,211 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 Choate 48 — Dacron, laminate, and cruising performance tiers.