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Neptune 14
 ·  Builder: American Fiberglass Corp.  ·  First built: 1970
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About the Neptune 14

Built by American Fiberglass Corp. starting in 1970, this compact centerboard dinghy represents classic small boat design from sailing's fiberglass revolution era. At just over 14 feet with a beam approaching 6 feet, the Neptune 14 offers impressive stability for its size while maintaining the light 445-pound displacement that makes single-handed launching feasible. The fractional sloop rig with 115 square feet of sail area delivers spirited performance for daysailing and sailing instruction. The centerboard configuration provides shallow-water versatility, allowing exploration of protected bays and coastal areas where fixed-keel boats cannot venture. With a draft of three feet board-down, the Neptune 14 can access deeper waters when needed while still offering beaching capability. The generous sail area-to-displacement ratio of 31.61 indicates lively performance in light to moderate conditions, while the capsize screening formula of 2.97 suggests reasonable stability for a small centerboarder. This makes the Neptune 14 well-suited for coastal daysailing, sailing education, and recreational use in protected waters. The fiberglass construction offers durability advantages over wooden dinghies of the era, requiring less maintenance while providing long-term reliability for weekend sailors and sailing programs alike.

Core Dimensions
LOA (Length Overall) 14.08 ft / 4.29 m
Beam 5.67 ft / 1.73 m
Max Draft 3.00 ft / 0.91 m
Min Draft 0.50 ft / 0.15 m
Displacement 445.00 lb / 202 kg
Sail Area (Reported) 115.00 ft² / 10.68 m²
Design & Construction
Hull Type Centerboard Dinghy
Rigging Type Fractional Sloop
Construction FG
Builder American Fiberglass Corp.
First Built 1970
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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
115.89
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
5.38
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. 4.64 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. 1.45 pounds/inch
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