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Maple Leaf One Design
Designer: Sparkman & Stephens  ·  Builder: Plywood Fabricators Ltd.  ·  First built: 1946
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About the Maple Leaf One Design

Originally developed as a one-design racing class, this Canadian sailboat represents a thoughtful approach to competitive sailing with standardized specifications ensuring fair racing conditions. The Maple Leaf One Design emerged from the tradition of regional racing fleets that prioritized sailor skill over equipment advantages. Built for club racing and day sailing, this boat delivers consistent performance characteristics that have made it popular among racing enthusiasts seeking close competition. The one-design concept means each hull shares identical measurements and sail plans, creating a level playing field where tactical sailing and crew work determine outcomes rather than equipment variations. The design emphasizes reliability and straightforward handling, making it accessible to developing racers while remaining competitive enough for experienced sailors. Its proportions suggest good stability and predictable sailing characteristics, qualities that have helped establish lasting one-design fleets in various sailing communities. While detailed specifications remain limited, the boat's enduring presence in organized racing speaks to its well-balanced design and the strong community support that sustains successful one-design classes. For sailors interested in competitive fleet racing with emphasis on skill development, the Maple Leaf One Design offers an established platform with dedicated racing circuits.

Core Dimensions
LOA (Length Overall) 35.16 ft / 10.72 m
LWL (Waterline Length) 24.00 ft / 7.32 m
Beam 7.83 ft / 2.39 m
Max Draft 5.50 ft / 1.68 m
Displacement 10,000.00 lb / 4,536 kg
Sail Area (Reported) 530.00 ft² / 49.24 m²
Design & Construction
Hull Type Fin Keel
Rigging Type Fractional Sloop
Construction Wood
Designer Sparkman & Stephens
Builder Plywood Fabricators Ltd.
First Built 1946
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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
 18.33
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
 36.43
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
 1.46
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 6.56
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
 1.65
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 671.46
Rig Dimensions
I (Foretriangle Height) 33.8
J (Foretriangle Base) 11.7
P (Mainsail Luff) 38.2
E (Mainsail Foot) 16.9
SA Fore 197.73
SA Main 322.79
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