R.N.S.A. Twenty-Four Information, Review, Specs

R.N.S.A. Twenty-Four Drawing
Make
R.N.S.A.
Model
Twenty-Four
Builder
Camper & Nicholson
Designer
Laurent Giles
Number Built
15
Production Year(s)
1947 - ??

The R.N.S.A. Twenty-Four (Royal Naval Sailing Association 24) stands as a pivotal piece of post-war maritime history, designed by the legendary Charles E. Nicholson of Camper & Nicholsons. Commissioned shortly after World War II, the vessel was envisioned as a "class" boat for the Royal Naval Sailing Association to provide officers and personnel with a robust, seaworthy, and affordable cruiser-racer. While Camper & Nicholsons provided the lines and early expertise, construction was often outsourced to various quality yards across the United Kingdom to meet the demand of the burgeoning naval sailing community. The design reflects a transition in naval architecture, moving away from the extreme "Meter boat" proportions of the pre-war era toward a more beamier, seaworthy "pocket cruiser" philosophy.

Sailing Performance & Handling

The R.N.S.A. 24 is frequently described as a "little ship" rather than a mere dayboat, a sentiment echoed in historical retrospectives by Classic Boat Magazine. With its traditional long keel and heavy displacement relative to its 24-foot length, the boat exhibits remarkable directional stability and a gentle motion in a seaway that belies its small stature.

The sail plan—originally a fractional sloop rig—was designed to be manageable by a small crew while maintaining enough power to drive the hull through a typical English Channel chop. While it lacks the high-pointing ability of modern fin-keel racers, the Nicholson-designed hull excels in reaching and maintains a balanced helm even as the wind freshens. Its ballast-to-displacement ratio is substantial, providing a high degree of ultimate stability. Owners often report that the boat "finds its groove" at a moderate angle of heel and stays there, tracking reliably without the flighty temperament associated with lighter, contemporary designs.

Interior Comfort & Variations

For a 24-foot vessel designed in the late 1940s, the R.N.S.A. 24 offers a remarkably functional, albeit snug, interior. The cabin typically provides two full-length settee berths in the main saloon, with some variations including a "V-berth" or storage area forward. Headroom is limited, as is common for yachts of this era and size, requiring a seated or "hunched" posture for most adults.

Construction variations are significant among the fleet. While most were built using high-quality mahogany or larch planking on oak frames, the specific finishing materials—ranging from teak trim to painted marine plywood—vary based on the original building yard. A notable "sibling" to the R.N.S.A. 24 is the Nicholson 26, which arrived later as a fiberglass evolution of these principles, offering more volume. However, the R.N.S.A. 24 remains the purist’s choice for its wooden craftsmanship and the specific "sweetness" of its lines, which were slightly more slender than its GRP successors.

The R.N.S.A. 24 gained its primary fame within the British military establishment, serving as the standard training vessel for generations of Royal Navy sailors. Its cultural footprint is deeply tied to the Royal Naval Sailing Association, which fostered a competitive racing circuit for the class during the 1950s and 60s. The boat’s pedigree is further enhanced by its designer, Charles E. Nicholson, whose work on America's Cup J-Class yachts like Endeavour lent the R.N.S.A. 24 an air of elite design heritage that was accessible to the "common" naval officer.

Known Issues & Buyer’s Checklist

Purchasing an R.N.S.A. 24 today is primarily an exercise in wooden boat stewardship. Prospective buyers must prioritize a structural survey focusing on the following areas:

  • Fastenings and Ribs: Given the age of these vessels, the copper nail fastenings can work loose, and the steamed oak ribs may suffer from "broken backs" or rot, particularly in the bilge area where water sits.
  • Iron Keel Oxidation: Many R.N.S.A. 24s were fitted with cast iron keels. If the protective coating fails, rust can expand and put pressure on the keel bolts, leading to "weeping" at the hull-to-keel joint.
  • Deck and Coachroof Joints: The transition between the wooden deck and the coachroof is a common site for freshwater ingress. Rot in the deck beams or the carlins is a high-signal area for expensive repairs.
  • Chainplates: The original galvanized or early stainless steel chainplates are often reaching the end of their fatigue life and should be inspected for hairline fractures or corrosion hidden behind the cabinetry.

Community & Resources

The primary hub for information remains the Royal Naval Sailing Association. While the class is no longer a "front line" racing fleet, the association maintains historical records and provides a sense of lineage for current owners. Technical support is often found through the broader community of Nicholson yacht owners, who share a common design language regardless of the specific model size.

The Verdict

The R.N.S.A. Twenty-Four is a connoisseur’s pocket cruiser that offers a direct link to the golden age of British yacht design. It is not a boat for those seeking modern volume or maintenance-free ownership, but for the sailor who values pedigree and sea-kindliness, it is nearly peerless in its size class.

Pros:

  • Exceptional seaworthiness and stability for a 24-foot boat.
  • Designed by Charles E. Nicholson, one of history’s greatest naval architects.
  • Elegant, classic lines that attract attention in any harbor.
  • Heavy-displacement "big boat" feel in a small, manageable package.

Cons:

  • Requires the high level of maintenance inherent to vintage wooden hulls.
  • Limited interior headroom and living space by modern standards.
  • Performance in light winds is sluggish compared to modern fin-keel designs.

Measurements

Construction & Hull

Construction Material
Wood
Hull Type
Monohull Sailboat
Keel Type
Full
Rudder
1x Transom-Hung
Ballast
-
Displacement
9650 lbs
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
32 ft
Waterline Length (LWL)
24 ft
Beam
7.5 ft
Draft
5.33 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Fractional Sloop
P (Main Luff)
34.1 ft
E (Main Foot)
12.3 ft
I (Foretriangle Height)
30.8 ft
J (Foretriangle Base)
12 ft
Forestay Length (est)
33.06 ft
Sail Area
395 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
13.94
Ballast / Displacement Ratio
Displacement / Length Ratio (D/L) Ratio
311.63
Comfort Ratio
38.56
Capsize Screening Formula
1.41
Hull Speed
6.56 kn