ETAP 21i Information, Review, Specs

Make
ETAP
Model
21i
Builder
Etap Yachting
Designer
Number Built

The Etap 21i represents the Belgian shipyard's mastery of the small cruiser segment, successfully blending the brand’s hallmark "unsinkable" construction with contemporary, performance-oriented lines by naval architect Jacques de Ridder. Launched in the mid-1990s as a successor to the earlier Etap 20 and 22 models, the 21i was engineered to provide a modern, sporty sailing experience while retaining the high safety standards that defined Etap’s market position. The vessel’s core technical distinction is its double-skin hull construction, where closed-cell polyurethane foam is injected between the inner and outer fiberglass skins. This provides enough buoyancy to keep the boat afloat and sailable even if completely swamped, while also offering exceptional thermal and acoustic insulation—a rarity in boats of this size.

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Sailing Performance & Handling

The Etap 21i is widely regarded as a stiff and capable performer, benefitting from Jacques de Ridder’s focus on modern hull shapes and efficient underwater profiles. Unlike many of its predecessors, the 21i features a relatively wide beam carried well aft and a vertical transom, which maximizes the waterline length. According to an editorial review by Yachting Monthly, the boat is a "lively performer" that feels secure even when pressed in a breeze.

Standard configurations typically included a choice between a deep fin keel or Etap’s signature tandem keel. The tandem keel is particularly notable, as it provides a shallow draft without the complexity of a lifting mechanism, using two shorter foils connected by a longitudinal bulb to maintain lift and stability. Handling is further enhanced by a dual-rudder system, which ensures the boat maintains exceptional grip and steerage even when heeled, preventing the "broaching" tendency common in wide-stern yachts with a single rudder. While the displacement-to-length ratio suggests a cruiser, the boat’s responsiveness and ability to plane under the right conditions give it a more athletic character than its 2.5-ton siblings, the Etap 24i and 26i.

Interior Comfort & Variations

The interior of the Etap 21i is defined by the absence of traditional wooden bulkheads and fuzzy headliners, as the inner hull molding serves as the finished interior surface. This results in a clean, bright, and exceptionally dry cabin. Because of the foam insulation between the hulls, the 21i is largely immune to the condensation issues that plague many single-skin fiberglass boats, making it a viable option for early-spring or late-autumn cruising in cooler climates.

The layout is an open-plan arrangement that maximizes the 21-foot footprint. It features a double V-berth forward and two full-length settee berths extending under the cockpit. The boat was designed with a modular approach; many units feature a small galley to port and a chemical or marine toilet tucked under the forward berth. While headroom is limited to sitting height, the large forward-facing window and side portlights create a sense of volume. Variations of the model were primarily limited to keel depths and the evolution of interior trim, though the fundamental hull and deck molds remained consistent throughout its production run alongside its larger sibling, the Etap 24i, which utilized a similar design language but offered more dedicated "zones" for cooking and navigation.

Known Issues & Buyer’s Checklist

Prospective buyers of an Etap 21i should focus their inspection on the unique aspects of its "unsinkable" construction and its specific hardware choices.

  • Foam Core Integrity: While the polyurethane foam is closed-cell, it is vital to inspect for any hull breaches that may have allowed water to sit between the skins for extended periods. Use a moisture meter or check for localized "soft spots" on the deck or hull.
  • Rudder Linkage: The dual rudder system utilizes a connecting bar to synchronize the foils. Over time, the bushings and the linkage itself can develop play, leading to a "loose" feeling at the tiller.
  • Window Seals: The large forward-facing wrap-around window is a signature aesthetic feature but can be prone to crazing or leaking if the original sealant has succumbed to UV degradation.
  • Outboard Well and Bracket: Most 21i models utilize an outboard engine. Inspect the transom mount for stress cracking and ensure the fuel line routing hasn't caused wear on the surrounding fiberglass.

Community & Resources

Owners of the Etap 21i are supported by a network of dedicated associations that preserve the technical documentation for these vessels, which is particularly important since the original shipyard ceased production. The Etap Owners Association (UK) is a primary hub for technical advice, providing manuals and maintenance tips specifically related to the tandem keel and double-hull maintenance. Regional clubs in Belgium and the Netherlands also remain active, reflecting the brand’s strong Northern European heritage.

The Verdict

The Etap 21i remains one of the most intelligent designs in the 20-to-22-foot cruiser market, offering a level of safety and climate comfort that few modern alternatives can match. It is an ideal vessel for sailors transitioning from dinghies to cruisers or for those seeking a "pocket" yacht capable of coastal hops.

Pros:

  • Safety: Genuine unsinkable construction provides immense peace of mind.
  • Insulation: Double-hull design eliminates condensation and stays warmer in cold weather.
  • Handling: Dual rudders provide excellent control, especially with the wide-stern hull.
  • Versatility: The tandem keel option allows for shallow-water cruising without a centerboard.

Cons:

  • Headroom: Limited to sitting height, which may be restrictive for longer cruises.
  • Weight: Heavier than some competitors of the same length due to the double-hull construction, requiring a more substantial towing vehicle.
  • Repair Complexity: Significant hull damage can be more difficult to repair traditionally due to the foam sandwich core.

Measurements

Construction & Hull

Construction Material
Hull Type
— Sailboat
Keel Type
Ballast
-
Displacement
-
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
21 ft
Waterline Length (LWL)
-
Beam
8.17 ft
Draft
2.3 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
P (Main Luff)
-
E (Main Foot)
-
I (Foretriangle Height)
-
J (Foretriangle Base)
-
Forestay Length (est)
-
Sail Area
-

Calculations

Sail Area / Displacement (SA/D) Ratio
Ballast / Displacement Ratio
Displacement / Length Ratio (D/L) Ratio
Comfort Ratio
Capsize Screening Formula
Hull Speed
— kn