The Kingfisher 20+ represents a refined evolution of the original Kingfisher 20, the vessel that effectively launched Westfield Engineering into the mainstream of British yachting. Designed by R.A.G. Nierop, the 20+ was conceived as a robust, pocket-sized blue-water cruiser capable of handling much more than its 20-foot LOA suggests. While the "Plus" designation signifies incremental improvements in interior volume and deck hardware over the earliest 1960s iterations, the core DNA remains centered on Nierop’s aeronautical approach to hydrodynamics and the builder’s commitment to heavy-duty GRP construction. These vessels were built to a standard of "over-engineering" that has allowed a significant number of the fleet to remain in active service over half a century later.
KingFisher 20+ Information, Review, Specs

- Make
- KingFisher
- Model
- 20+
- Builder
- Westfield Engineering
- Designer
- R.A.G. Nierop
- Number Built
- Production Year(s)
- 1967 - 1978
Sailing Performance & Handling
The Kingfisher 20+ is defined by its twin-keel (bilge keel) configuration, a design choice that prioritizes stability and the ability to "dry out" in tidal harbors over raw windward speed. With a displacement-to-length ratio that leans toward the "heavy" side of the spectrum, the boat offers a remarkably steady motion in a seaway. According to technical archives maintained by the Kingfisher Yacht Owners Association, the hull’s shallow draft of approximately 2 feet 3 inches allows for exploration of estuaries and creeks that are inaccessible to fin-keel contemporaries.
Under sail, the 20+ is a stiff performer. Its ballast is concentrated low in the twin keels, providing a high righting moment that allows the boat to carry full sail longer than most 20-footers when the breeze freshens. While it will not point as high as a racing dinghy, it tracks exceptionally well due to the dual-keel arrangement acting as twin skegs. Handling is generally described as "forgiving," making it an ideal platform for single-handed sailors or those transitioning from dinghies to cruisers. Some owners have experimented with junk rigs on this hull—a nod to the influence of Blondie Hasler on the era—but the standard masthead sloop remains the most common and efficient configuration for general coastal cruising.
Interior Comfort & Variations
For a vessel of its size, the Kingfisher 20+ offers a surprisingly functional interior, though it adheres to the "micro-cruiser" philosophy of the 1970s. The cabin typically features four berths: two full-length settee berths in the main saloon and a V-berth forward. The "Plus" model is distinguished from its sibling, the Kingfisher 20 Junior, by its expanded coachroof, which provides increased headroom and a more usable galley area. The "Junior" variant utilized a lower-profile deck mold, sacrificing interior volume for a sleeker, more "sporting" appearance, though it remains significantly less popular on the used market than the more commodious 20+.
The layout is centered around a compact central table, often with a small sink and a two-burner stove tucked near the companionway for ventilation. Storage is found beneath the bunks and in lockers behind the settee backs. While the finishes are utilitarian—featuring molded GRP liners and functional teak trim—the layout is praised for its ergonomic use of space. Unlike many modern boats of this length that attempt to squeeze in a separate heads (bathroom) compartment, the 20+ usually utilizes a simple chemical toilet or a "under-cushion" marine head, prioritizing open living space over privacy.
Known Issues & Buyer’s Checklist
Prospective buyers should approach a Kingfisher 20+ with an eye toward the longevity of its structural components. While the hulls are famously thick, there are several areas identified by the owner community as requiring attention:
- Keel Attachment Points: Although the twin keels are robust, the internal floors and glasswork where the keels join the hull should be inspected for stress fractures or signs of hard grounding, which can lead to weeping at the joints.
- Deck Core Integrity: Like many GRP boats of this era, the deck may utilize a balsa or plywood core. Check for "soft spots" or delamination around high-load areas like the mast step and chainplates.
- Window Seals: The original acrylic windows were often secured with rubber gaskets that perish over time. Many owners have replaced these with modern "bolt-through" or bonded windows to address chronic leaks.
- Outboard Well Maintenance: Most 20+ models feature an engine well in the cockpit. Ensure the mounting bracket is secure and that the well itself has not suffered from osmotic blistering due to trapped water.
Community & Resources
The primary hub for technical support is the Kingfisher Yacht Owners Association, which maintains a comprehensive archive of original brochures, sail plans, and modification guides. This association is one of the more active "classic" groups in the UK, frequently organizing rallies and providing a forum for owners to share DIY solutions for maintaining Nierop's designs.
The Verdict
The Kingfisher 20+ is a "big" small boat, offering a level of seaworthiness and security that belies its 20-foot frame. It is an excellent choice for budget-conscious sailors who prioritize the ability to explore tidal waters and want a hull that can withstand a genuine blow.
Pros:
- Exceptional Stability: The twin-keel design provides a stiff, safe feel in heavy weather.
- Tidal Versatility: Ability to stand upright on the sand allows for cheap mooring and easy maintenance.
- Robust Build: Thick GRP laminates make the hull nearly indestructible compared to modern light-displacement boats.
- Active Community: Strong owner support ensures technical knowledge is easy to find.
Cons:
- Limited Headroom: Despite the "Plus" cabin, tall sailors will find the interior cramped for extended stays.
- Windward Performance: Will not win races against modern fin-keelers or more performance-oriented designs.
- Age-Related Wear: Most examples require updates to electronics, rigging, and window seals.
Measurements
Construction & Hull
- Construction Material
- Fiberglass
- Hull Type
- Monohull Sailboat
- Keel Type
- Twin
- Rudder
- 1x —
- Ballast
- 1100 lbs (Iron)
- Displacement
- 2900 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 21.58 ft
- Waterline Length (LWL)
- 19.25 ft
- Beam
- 6.92 ft
- Draft
- 2.33 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Masthead Sloop
- P (Main Luff)
- -
- E (Main Foot)
- -
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 177 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 13.92
- Ballast / Displacement Ratio
- 37.93
- Displacement / Length Ratio (D/L) Ratio
- 181.49
- Comfort Ratio
- 17.07
- Capsize Screening Formula
- 1.94
- Hull Speed
- 5.88 kn