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Sail Specs & Dimensions

Gale Force Sails

Sail dimensions, sail area, rig measurements and used sails for sale — Gale Force (John Kaiser Sr. design).

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Rigging Dimensions

The four foretriangle measurements sailmakers need to quote a new suit.

I ?
15.64 ft
J ?
17.30 ft
P ?
ft
E ?
ft

Sail Area Breakdown

Calculated from rigging dimensions. Use these as your starting point when ordering a new suit.

SailArea (ft²)Area (m²)
MainsailP × E ÷ 2
100% ForetriangleI × J ÷ 2 135.3 12.6
150% GenoaTypical light-air headsail 202.9 18.9
Storm Jib~50% of foretriangle, high-cut 67.6 6.3
Symmetric SpinnakerEstimated from I, J 487.0 45.2
Total Working Sail AreaMain + 100% foretriangle

Foretriangle Diagram

Scale diagram unavailable — I, J, P, and E measurements are not all published for the Gale Force.

Performance Ratios

How the Gale Force carries its sail relative to its displacement.

SA/D Ratio
15.6
Moderate — comfortable coastal cruiser, not overcanvassed.
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 Gale Force owners usually carry and what's worth buying used vs. new.

Mainsail — ft²
Dacron cross-cut with 2 reef points is standard. Full-batten is a common upgrade.
Replace new
150% Genoa 202.9 ft²
The workhorse headsail. Most boats have one on a furler by now.
Replace new
110% Working Jib ~149 ft²
Good secondary sail for breezy days — used market is strong.
Buy used
Storm Jib 67.6 ft²
Bright orange recommended. Rarely used, hard to justify new.
Buy used
Asymmetric Spinnaker ~487 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 Gale Force — Dacron, laminate, and cruising performance tiers.

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