Rigging Dimensions
The four foretriangle measurements sailmakers need to quote a new suit.
I ?
34.28 ft
J ?
10.17 ft
P ?
29.63 ft
E ?
12.80 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 | 189.6 | 17.6 |
| 100% ForetriangleI × J ÷ 2 | 174.3 | 16.2 |
| 150% GenoaTypical light-air headsail | 261.5 | 24.3 |
| Storm Jib~50% of foretriangle, high-cut | 87.2 | 8.1 |
| Symmetric SpinnakerEstimated from I, J | 627.5 | 58.3 |
| Total Working Sail AreaMain + 100% foretriangle | 363.9 | 33.8 |
Foretriangle Diagram
Drawn to scale from published I, J, P, E measurements — Masthead Sloop · E. G. Van De Stadt design
Performance Ratios
How the Dogger carries its sail relative to its displacement.
SA/D Ratio
16.6
Moderate — comfortable coastal cruiser, not overcanvassed.
Mast Height (above DWL)
— ft
Air draft not published — measure yours before any bridge transit.
Ballast Ratio
48%
Race-oriented ballast ratio — stiff and powerful.
Typical Sail Inventory
What Dogger owners usually carry and what's worth buying used vs. new.
Mainsail 189.6 ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 261.5 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~192 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 87.2 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~628 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 Dogger — Dacron, laminate, and cruising performance tiers.