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Neptune 24 Fk
Designer: Capital Yachts Inc.  ·  Builder: Capital Yachts Inc.  ·  First built: 1978
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About the Neptune 24 Fk

A compact and approachable sailboat, the Neptune 24 Fk represents the kind of vessel that appeals to sailors looking for an entry point into keelboat sailing without sacrificing the satisfaction of genuine on-the-water performance. Designed with accessibility in mind, this boat suits coastal cruising and day sailing particularly well, offering a manageable platform for new and intermediate sailors while still providing enough character to keep experienced hands engaged. With limited specification data widely available, the Neptune 24 Fk remains something of a niche find in the used boat market, which can make it an intriguing option for buyers willing to do some hands-on research. Its modest size suggests it would be well suited to protected waters, inland lakes, and sheltered coastal passages rather than extended offshore voyaging. For prospective buyers, tracking down original documentation or connecting with owners through sailing clubs and forums is recommended, as firsthand accounts often reveal the most practical insights about a boat's handling, maintenance history, and true capabilities. A sea trial remains essential before committing to any purchase.

Core Dimensions
LOA (Length Overall) 24.00 ft / 7.32 m
LWL (Waterline Length) 21.00 ft / 6.40 m
Beam 7.98 ft / 2.43 m
Max Draft 4.67 ft / 1.42 m
Displacement 3,200.00 lb / 1,451 kg
Ballast 1,200.00 lb / 544 kg
Sail Area (Reported) 250.00 ft² / 23.23 m²
Design & Construction
Hull Type Fin w/transom hung rudder
Rigging Type Masthead Sloop
Construction FG
Designer Capital Yachts Inc.
Builder Capital Yachts Inc.
First Built 1978
Related Sailboats Neptune 24 Cb · San Juan 24 · Wavelength 24 · Windrose 24 · J24
Owner Reviews

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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
222
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
18.47
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
14.19
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
2.17
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. 6.14
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
3.27
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. 598.78
Rig Dimensions
I (Foretriangle Height) 27.0
J (Foretriangle Base) 9.58
P (Mainsail Luff) 21.75
E (Mainsail Foot) 9.0
SA Fore 129.33
SA Main 97.88
How It Compares

vs. J24, Neptune 24 Cb, San Juan 24, Wavelength 24, Windrose 24

This boat Similar boats
Dimensions
LOA
Neptune 24 Fk ★
24.0 ft
J24
24.0 ft
Neptune 24 Cb
24.0 ft
San Juan 24
24.0 ft
Wavelength 24
24.0 ft
Windrose 24
24.0 ft
LWL
Neptune 24 Fk ★
21.0 ft
J24
20.0 ft
Neptune 24 Cb
21.0 ft
San Juan 24
19.5 ft
Wavelength 24
20.3 ft
Windrose 24
21.4 ft
Beam
Neptune 24 Fk ★
8.0 ft
J24
8.9 ft
Neptune 24 Cb
8.0 ft
San Juan 24
8.0 ft
Wavelength 24
9.0 ft
Windrose 24
7.8 ft
Displacement
Neptune 24 Fk ★
3 lbs
J24
3 lbs
Neptune 24 Cb
3 lbs
San Juan 24
3 lbs
Wavelength 24
2 lbs
Windrose 24
2 lbs
Ballast
Neptune 24 Fk ★
1 lbs
J24
950 lbs
Neptune 24 Cb
1 lbs
San Juan 24
1 lbs
Wavelength 24
1 lbs
Windrose 24
700 lbs
Sail Area
Neptune 24 Fk ★
250 sq ft
J24
262 sq ft
Neptune 24 Cb
250 sq ft
San Juan 24
246 sq ft
Wavelength 24
288 sq ft
Windrose 24
222 sq ft
Performance
PHRF Rating (lower = faster)
Neptune 24 Fk ★
222 s/nm
J24
Neptune 24 Cb
San Juan 24
222 s/nm
Wavelength 24
162 s/nm
Windrose 24
254 s/nm
SA / Displacement (higher = more powerful)
Neptune 24 Fk ★
18.5
J24
19.8
Neptune 24 Cb
18.5
San Juan 24
18.2
Wavelength 24
25.1
Windrose 24
19.9
Ballast / Disp (higher = stiffer)
Neptune 24 Fk ★
J24
Neptune 24 Cb
37.5 %
San Juan 24
51.6 %
Wavelength 24
Windrose 24
Comfort Ratio (higher = more comfortable offshore)
Neptune 24 Fk ★
14.2
J24
12.3
Neptune 24 Cb
14.2
San Juan 24
14.9
Wavelength 24
9.7
Windrose 24
10.8
Capsize Screening (lower = safer)
Neptune 24 Fk ★
2.17
J24
2.44
Neptune 24 Cb
2.17
San Juan 24
2.17
Wavelength 24
2.66
Windrose 24
2.34
Displacement / Length (lower = lighter)
Neptune 24 Fk ★
J24
Neptune 24 Cb
154
San Juan 24
192
Wavelength 24
Windrose 24
Hull Speed
Neptune 24 Fk ★
6.1 kts
J24
6.0 kts
Neptune 24 Cb
6.1 kts
San Juan 24
5.9 kts
Wavelength 24
6.0 kts
Windrose 24
6.2 kts
Speed Number (higher = faster)
Neptune 24 Fk ★
3.3
J24
3.4
Neptune 24 Cb
3.3
San Juan 24
2.9
Wavelength 24
4.8
Windrose 24
4.5
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