Review of Neptune 24

Basic specs..

The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.

The boat is equipped with 57.0 liter fresh water capacity.

The Neptune 24 has been built with different keel alternatives.

CentreBoard

One option is a centreboard keel. A centreboard keel is a pivoting lifting keel, allowing to sail both coastal and inland waters.

The boat can enter even shallow marinas as the draft is just about 0.61 - 0.71 meter (2.00 - 2.30 ft) dependent on the load. See immersion rate below.

Another option is a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a full keel.

Neptune 24 can enter even shallow marinas as the draft is just about 1.42 - 1.52 meter (4.66 - 4.96 ft) dependent on the load. See immersion rate below.

Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

What is Capsize Screening Formula (CSF)?

The capsize screening value for Neptune 24 is 2.16, indicating that this boat would not be accepted to participate in ocean races.

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 6.1 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Neptune 24 is about 104 kg/cm, alternatively 583 lbs/inch. Meaning: if you load 104 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 583 lbs cargo on the boat it will sink 1 inch.

Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.

What is Motion Comfort Ratio (MCR)?

What is L/B (Length Beam Ratio)?

What is a Ballast Ratio?

What is Displacement Length Ratio?

SA/D (Sail Area Displacement ratio) Indicates how fast the boat is in light wind: - Cruising Boats have ratios 10-15 - Cruiser-Racers have ratios 16-20 - Racers have ratios above 20 - High-Performance Racers have ratios above 24 Sail-area/displacement ratio (SA/D ratio): 18.42

Maintenance

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 17m 2 (182 ft 2 ). Based on this, your favourite maritime shop can tell you the quantity you need.

If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful.

UsageLengthDiameter
Jib sheet 7.3 m(24.0 feet)10 mm(3/8 inch)
Genoa sheet7.3 m(24.0 feet)10 mm(3/8 inch)
Mainsheet 18.3 m(60.0 feet)10 mm(3/8 inch)
Spinnaker sheet16.1 m(52.8 feet)10 mm(3/8 inch)

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.

We are always looking for new photos. If you can contribute with photos for Neptune 24 it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us . Criticism helps us to improve.

Neptune 24 fk

The neptune 24 fk is a 24.0ft masthead sloop designed by capital yachts inc. and built in fiberglass by capital yachts corp. since 1978..

The Neptune 24 fk is a light sailboat which is a good performer. It is stable / stiff and has a low righting capability if capsized. It is best suited as a day-boat.

Neptune 24 fk sailboat under sail

Neptune 24 fk for sale elsewhere on the web:

neptune 24 sailboat

Main features

Model Neptune 24 fk
Length 24 ft
Beam 7.98 ft
Draft 4.67 ft
Country United states (North America)
Estimated price $ 0 ??

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neptune 24 sailboat

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Sail area / displ. 18.47
Ballast / displ. 37.50 %
Displ. / length 154.26
Comfort ratio 14.19
Capsize 2.17
Hull type Monohull fin keel with transom hung rudder
Construction Fiberglass
Waterline length 21 ft
Maximum draft 4.67 ft
Displacement 3200 lbs
Ballast 1200 lbs
Hull speed 6.14 knots

neptune 24 sailboat

We help you build your own hydraulic steering system - Lecomble & Schmitt

Rigging Masthead Sloop
Sail area (100%) 250 sq.ft
Air draft 0 ft ??
Sail area fore 129.33 sq.ft
Sail area main 97.88 sq.ft
I 27 ft
J 9.58 ft
P 21.75 ft
E 9 ft
Nb engines 1
Total power 0 HP
Fuel capacity 0 gals

Accommodations

Water capacity 0 gals
Headroom 0 ft
Nb of cabins 0
Nb of berths 0
Nb heads 0

Builder data

Builder Capital Yachts Corp.
Designer Capital Yachts Inc.
First built 1978
Last built 0 ??
Number built 0 ??

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Executive Boat And Yacht

1982 24′ Capital Yachts “Neptune 24” Sailboat

$ 5,900.00

  • Honda 7.5hp 4-stroke outboard motor
  • EZ Loader 2-axle trailer w/surge brakes
  • Snap-on bad-weather cover over boom that encloses cockpit
  • (2) Spinnakers
  • (2) Spinnaker poles
  • 150 Percent genoa
  • Wind, speed & knot gauges
  • Depthfinder
  • Cockpit manual bilge pump
  • (4) Cockpit bench seat storage compartments
  • Transom outboard motor mount
  • Swim ladder
  • Bottom paint
  • (2) Pull-out bench beds
  • Galley fold-down table
  • Alcohol 2-burner stove
  • Stainless-steel galley sink
  • Porta-potti w/sink
  • Beam: 8’0″
  • Net weight of the boat only: 3,200 lbs.
  • 10-Gallon fresh water capacity

Trailered at 3600 South Main, Salt Lake City, Utah

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10-09-2022, 19:53  
Neptune 24 CB in . Looks like a good solid BUT. The appears to be packed with lead shot that at some point froze solid and shattered the floor. What is the nets opinion? I'm more than capable of doing the , but owner is asking top dollar 7500.00
05-12-2022, 10:51  
for very specific reasons, I would be looking for another one for that amount of . That sounds like a lot of . There are a lot of very similar to that for less, in better shape.

Carlos
05-12-2022, 16:32  
. 5k boat. Thank you for your reply.
05-12-2022, 18:42  
 
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  • Sailboat Guide

Neptune 24 FK

Neptune 24 FK is a 24 ′ 0 ″ / 7.3 m monohull sailboat designed by Capital Yachts Inc. and built by Capital Yachts Corp. starting in 1978.

Drawing of Neptune 24 FK

Rig and Sails

Auxilary power, accomodations, calculations.

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

SA/D = SA ÷ (D ÷ 64) 2/3

  • SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D : Displacement in pounds.

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Ballast / Displacement * 100

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

  • D: Displacement of the boat in pounds
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

CSV = Beam ÷ ³√(D / 64)

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Neptune 24 transom

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Ahoy, I am curious to know whether this is a normal occurence or something to be concerned about: When we run the outboard on our Neptune 24 at a high rev the transom bows out slightly from the pressure excerted....is this normal? We are in the process of restoring the rest of the boat and I have this image of finishing up and then watching the transom fall off as we motor up some day...! I have noticed that the motor mount, rudder and ladder are all backed on the inside by (presumably) marine plywood backing. I believe that wood may be giving out to dryrot at the edges, as one can pull off tufts of it from the extreme edges although the center of it is quite strong and firm. Cheers, Tim Kasper Finnegans Wake, San Diego  

neptune 24 sailboat

What size is the engine? What speed are you going? Sounds like the transom might be weak; but can't say for sure. Any idea how thick the transom fiberglass is or if it is cored or solid? If it's cored that would explain the flexing; the outer skin would push in because it is not transmitting load to the inner skin of the hull.  

Hi, Thanks for the response! The engine is 6hp and at the most we have moved 7 knots but usually 3-5 knots. The fibergalss looks to be 1/8 inch but I am not positive. I am not sure if it is cored, the Capital Yachts manual states that after the gelcoat is applied to the mold: "next a series of continuous layers of multi-directional mat are applied and hand rolled to a constant thickness similar to the hull lay-up. A layer of woven roving is then applied to all high stress areas...including the motor mounts etc..." To me it doesn't look like the woven roving is there.  

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Neptune 24 Mast

  • Thread starter 5760sailor
  • Start date Mar 30, 2021
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Maxspar Used Masts

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    Beam:  8'    Draft:  5'
    Beam:  6'    Draft:  4'
    Draft:  2.50'

neptune 24 sailboat

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IMAGES

  1. 1977 Neptune 24 Overview

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  2. Neptune 24 CB

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  3. Neptune 24 CB

    neptune 24 sailboat

  4. Neptune 24 CB

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  5. Neptune 24 CB

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  6. 1982 Neptune 24 sailboat for sale in Montana

    neptune 24 sailboat

COMMENTS

  1. NEPTUNE 24 CB

    Find out the dimensions, weight, sail area, and performance of the NEPTUNE 24 CB, a keel/centerboard masthead sloop built by Capital Yachts in 1978. See the sailboat calculations, links, and forum topics related to this model.

  2. Neptune 24

    The Neptune 24 is a recreational keelboat, built predominantly of fiberglass, with wood trim.It has a masthead sloop rig, a raked stem, a plumb transom, a transom-hung rudder controlled by a tiller and a fixed fin keel or stub shoal draft keel, with an optional centerboard.It displaces 3,200 lb (1,451 kg) and carries 1,200 lb (544 kg) of ballast. A standard height mast or tall rig was offered.

  3. Review of Neptune 24

    Keel. The Neptune 24 has been built with different keel alternatives. CentreBoard. One option is a centreboard keel. A centreboard keel is a pivoting lifting keel, allowing to sail both coastal and inland waters. The boat can enter even shallow marinas as the draft is just about 0.61 - 0.71 meter (2.00 - 2.30 ft) dependent on the load.

  4. 1977 Neptune 24 Overview

    This video features a comprehensive overview of Neptune 24, hull #001, affectionately known as Minnie Belle. I have spent the last 8 years restoring and upda...

  5. 1981 24' Neptune Neptune 24

    This 1981 Neptune 24 is in very good condition. During my 35 years of ownership, AEOLUS has enjoyed indoor winter storage, with the cushions and motor stored in a heated bldg. Even though the boat is 40 years old, it is substantially in manufacturer's original condition, plus 35 years of improvements, additions and normal maintenance.

  6. 1985 Capital Yachts Neptune 24 sailboat for sale in Washington

    A 24-foot fiberglass monohull cruiser with a trailer, a Yamaha outboard engine, and a pop-top cabin. The boat is located in Bainbridge Island, Washington and has been restored with new foam, lines, sails, and covers.

  7. Neptune 24 CB

    Neptune 24 CB is a 24′ 0″ / 7.3 m monohull sailboat designed by Capital Yachts Inc. and built by Capital Yachts Corp. starting in 1978. ... The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more. Formula. D/L = (D ÷ 2240) ÷ (0.01 x LWL)³ D: Displacement of the boat in pounds ...

  8. 24' Capital Yachts Neptune 24

    The Neptune 24 is a brilliantly balanced boat with a mind of its own and a soul without age. Bought it after it had been on the hard for 2 seasons and revived it with new anti-fouling paint and fresh-looking orange hull paint. It comes with a 9.8hp outboard Mercury 2 stroke engine to bring you out to the wind. Shoal draft is extremely ...

  9. Neptune 24 cb

    The Neptune 24 cb is a 24.0ft masthead sloop designed by Capital Yachts Inc. and built in fiberglass by Capital Yachts Corp. since 1978. The Neptune 24 cb is a light sailboat which is a good performer. It is stable / stiff and has a low righting capability if capsized. It is best suited as a day-boat. There is a very short water supply range.

  10. Neptune 24

    Jun 2, 2004. 55. Neptune 24 canyon lake, tx. Sep 10, 2005. #1. I have recently acquired a Neptune 24 made by Capital Yachts. I believe it is the small version of the Newport 30. It seems to be very well constructed and for sure is better built than my Hunter 22. Does anyone know what the designed capabilities of this boat is?

  11. 80 Capital Yachts Neptune 24 sailboat for sale in Maine

    Well maintained boat and trailer with up dates. Second owner. Sailed main coast each year. Kids gone---want smaller boat. Honda Pilot launches/retrieves this one. ... This Capital Yachts Neptune 24 : Added 18-Jun-2018 Capital Yachts Sailboats Capital Yachts 24s Maine Capital Yachtss. Featured Sailboats: Home. Register & Post. View All Sailboats.

  12. Neptune 24

    Join Date: Sep 2014. Location: Channel Islands, CA. Boat: 1962 Columbia 29 MK 1 #37. Posts: 14,725. Images: 67. Re: Neptune 24. I can only relay what I saw with a friend of mine who had an old Cal 24 with the swing keel, pretty similar to your boat. It was wet, got bounced around a good deal and the swing keel would clunk sometimes It is not my ...

  13. Neptune 24 fk

    The Neptune 24 fk is a 24.0ft masthead sloop designed by Capital Yachts Inc. and built in fiberglass by Capital Yachts Corp. since 1978. The Neptune 24 fk is a light sailboat which is a good performer. It is stable / stiff and has a low righting capability if capsized. It is best suited as a day-boat.

  14. 1982 24' Capital Yachts "Neptune 24" Sailboat

    Home / Sail Boats / 1982 24′ Capital Yachts "Neptune 24" Sailboat. 1982 24′ Capital Yachts "Neptune 24" Sailboat $ 5,900.00. Honda 7.5hp 4-stroke outboard motor. EZ Loader 2-axle trailer w/surge brakes. Shorepower. Snap-on bad-weather cover over boom that encloses cockpit. Fixed keel. Main sail

  15. Neptune 24 CB

    Looking at purchasing Neptune 24 CB in Oregon. Looks like a good solid boat BUT. The keel appears to be packed with lead shot that at some point froze solid and shattered the interior fiberglass floor. What is the nets opinion? I'm more than capable of doing the repair, but current owner is asking top dollar 7500.00.

  16. Neptune 24 FK

    Neptune 24 FK is a 24′ 0″ / 7.3 m monohull sailboat designed by Capital Yachts Inc. and built by Capital Yachts Corp. starting in 1978. ... The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more. Formula. D/L = (D ÷ 2240) ÷ (0.01 x LWL)³ D: Displacement of the boat in pounds ...

  17. 1981 Capital Yachts Neptune 24 FG sailboat for sale in California

    1981 24' Capital Yachts Neptune 24 FG sailboat for sale in Prunedale California

  18. Neptune 24 transom

    7 posts · Joined 2008. #1 · Aug 17, 2008. Ahoy, I am curious to know whether this is a normal occurence or something to be concerned about: When we run the outboard on our Neptune 24 at a high rev the transom bows out slightly from the pressure excerted....is this normal? We are in the process of restoring the rest of the boat and I have this ...

  19. Neptune 24 Mast

    2. Neptune 24 CB Carter Lake. Mar 30, 2021. #1. Hi all, New here and just started sailing about 3 years ago. I have a 1978 Capital Yachts Neptune 24CB. A year ago our mast was snapped in half by a crazy windstorm (I'm in Colorado, huuuuge lakes here let me tell ya). A local person put a sleeve on the mast but now the mast moves at the joint too ...

  20. Neptune sailboats for sale by owner.

    Neptune preowned sailboats for sale by owner. Neptune used sailboats for sale by owner. Home. Register & Post. View All Sailboats. Search. Avoid Fraud. ... 24' J Boats J24 Basalt, Colorado Asking $6,000. 51' Beneteau Idylle 51 Miami, Florida Asking $95,000. 33' Tartan T33 Flag harbor marina, Maryland