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Wharram Ariki (classic)

1970–present · designed by James Wharram + Hanneke Boon · built by Wharram Designs (plans) / owner-built; yard-completed examples disproportionately common at this size

Flagship of the classic-era Wharram line — Polynesian-inspired large ocean-cruising catamaran, ~49 ft. V-section hulls (the original Wharram hull form, distinct from the Tiki-era asymmetric hulls), open slatted bridge deck (no solid panel), deck-stepped masts (twin-mast schooner typical), hulls lashed to crossbeams. Plywood construction from plans sold by Wharram Designs; given the size and complexity, yard-completed examples are disproportionately common. Wood-composite hull is repairable anywhere with hand tools, epoxy, and glass cloth. Designed for extended-range expedition / family / charter ocean cruising at the largest classic-Wharram size.

This is a general read on the Wharram Ariki (classic) class — informed background, not a verdict on any individual boat. Condition, refit history, and how a particular hull was sailed and stored matter far more than class reputation. Use it to know what to look for; for a read on a specific listing, run a free FairKeel report on that boat.

At a glance

Hull form: Multihull Cat
Rudder: Transom Hung
Mast step: Deck Stepped
Hull construction: Wood
Bridgedeck: Open
Production: 1970–present
Built in: UK (plans) / variable (owner-built)

What the Wharram Ariki (classic) is known for

Easily repairable anywhere — wood-composite hull can be patched with hand tools and locally-available materials. At this size, this is a major asset; comparable production cats need significant yard infrastructure for equivalent repairs.
Flagship of the classic Wharram line — substantial accommodation, expedition-credible.
Wharram Designs institutional support since the 1960s; engaged owner community.

Known trade-offs

Quality varies hull-by-hull — at Ariki size, build errors have major consequences. Build provenance + materials documentation are non-negotiable; ideally yard-completed or owner-built by a builder with prior experience.
Plywood-resin hulls have a finite lifespan dominated by moisture ingress; large surface area means expensive remediation if epoxy schedule history is weak.
Resale market is essentially nonexistent — fewer than ~30 hulls built globally (estimated); comparable sales data is missing. Marketing periods of 1-3+ years are typical.
Operating cost scales with size — marina (where it fits), haul-out, crew, and rig refit are all expensive.

Age-related quirks to expect

Owner-built quality variance — at Ariki size, build errors have major consequences; survey must assess THIS hull with great care severity: High affects: all (owner-built)

Plywood-resin hull moisture susceptibility — huge hull surface area increases inspection burden enormously severity: High affects: all (age + maintenance-driven)

Lashed crossbeam attachment — very large crossbeams; lashing replacement is a substantial undertaking severity: Medium affects: all (architectural)

Classic Wharram twin-mast schooner rig — specialist rigging and sailmaking knowledge required; few yards globally are equipped severity: Medium affects: all (architectural)

Very few comparable hulls — pricing is reference-poor and bracket is enormous severity: Medium affects: all

Systems to check before you buy

Hull-laminate condition (plywood + epoxy/resin) priority: offshore, coastal, liveaboard

Highest-risk system on any classic Wharram, and Ariki hull surface area is the largest in the classic line. Inspect resin coating condition (verify epoxy-upgrade history if originally built with older resin systems), plywood-stitch joint integrity, glass- sheathing delamination. Moisture-meter survey is mandatory and time-intensive at this size.

Lashings + crossbeam attachment priority: offshore, coastal

Hulls lashed to crossbeams. At Ariki scale, crossbeams are heavy- duty structures handling enormous load; annual inspection and replacement every 5-10 years.

Wharram twin-mast schooner rig priority: offshore, coastal

Ariki rigs are twin-mast schooners typical — class-specific and complex. Consult Wharram Designs or experienced Wharram riggers. Mast and rigging refits at this size are substantial.

Auxiliary propulsion (twin inboard diesels) priority: offshore, coastal, liveaboard

Twin small-to-mid inboards (25-50hp diesels each) typical. Inboard installs require structural-laminate inspection around engine beds, shaft logs, and fuel tanks.

How it fits your plans

Offshore: Designed for it. Flagship classic-Wharram expedition platform with substantial accommodation. Caveats: owner-built quality variance is the dominant risk; lashing regime + plywood-resin moisture management are non-negotiable.
Coastal: Possible but oversized. Wide beam exceeds most marina slip allowances; haul-out infrastructure is limited.
Liveaboard: Strong for groups, families, or small charter operations. Substantial accommodation in the hulls; no enclosed saloon between hulls — a deck-tent or hard-top over the open bridge platform provides weather shelter.

This guide is the class. A report is that hull. Paste the listing you're looking at and FairKeel grades every claim in it against what's known about the Wharram Ariki (classic) — where the evidence is thin, the red flags worth a second look, the costs likely to land in your first season, and whether the boat suits the plans you describe in a few short questions.

It won't read the photos or put a number on the boat — that's the Deep-Dive, and for the real answer, a surveyor. It will tell you when a Deep-Dive isn't worth buying. Free, no account, usually a minute or two.

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