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Mac Dinghy
Designer: Mcclintock-Dubdam  ·  First built: 1963
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About the Mac Dinghy

Small boat sailing enthusiasts seeking an accessible entry point into the sport will find much to appreciate in this compact dinghy design. Built for recreational sailing and basic sailing instruction, the Mac Dinghy represents a straightforward approach to small boat construction and handling. This simple yet functional design emphasizes ease of use over complex features, making it particularly well-suited for beginners learning fundamental sailing skills in protected waters. The boat's uncomplicated rigging and manageable size create an ideal platform for developing boat handling techniques without the intimidation factor of larger, more complex vessels. While comprehensive specifications remain limited, the Mac Dinghy appears designed with durability and simplicity as primary considerations. Its construction suggests suitability for sailing schools, yacht clubs, and individual sailors who prioritize straightforward operation over high performance characteristics. The design's focus on basic functionality rather than racing performance makes it appropriate for leisurely day sailing in harbors, lakes, and other sheltered waters. Those considering this boat should view it as a practical choice for learning or casual recreational sailing rather than serious racing or extended coastal exploration.

Core Dimensions
LOA (Length Overall) 10.00 ft / 3.05 m
Beam 4.08 ft / 1.24 m
Max Draft 1.50 ft / 0.46 m
Displacement 88.00 lb / 40 kg
Design & Construction
Hull Type Dbrd. Dinghy
Rigging Type Fractional Sloop
Construction FG
Designer McClintock-Dubdam
First Built 1963
Owner Reviews

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Performance Ratios
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
63.97
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
2.32
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. 3.91 kn
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. 0.74 pounds/inch
Rig Dimensions
I (Foretriangle Height) 0.30 ft / 0.09 m
P (Mainsail Luff) 65.00 ft² / 6.04 m²
E (Mainsail Foot) https://sailboatdata.com/forums/topic-tag/mac-dinghy/
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