1976–present · designed by James Wharram + Hanneke Boon · built by Wharram Designs (plans) / owner-built; some yard-completed examples
James Wharram + Hanneke Boon Polynesian-inspired ocean-cruising catamaran — a larger Pahi for extended-range voyaging or family liveaboard cruising. Plywood-epoxy stitch-and-glue construction from plans sold by Wharram Designs Ltd (Cornwall, UK); most hulls are owner-built by amateurs over 5-10+ year timelines, with a small number completed by specialist yards. Open slatted bridge deck (no solid panel), deck-stepped masts supported by lashings, hulls lashed to crossbeams with synthetic line. Wood-composite hull is repairable anywhere with hand tools, epoxy, and glass cloth — a major asset for remote ocean cruising at this size.
This is a general read on the Wharram Pahi 52 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
1976–present
Built in
UK (plans) / variable (owner-built)
What the Wharram Pahi 52 is known for
Easily repairable anywhere — wood-composite plywood-epoxy + glass cloth hull can be patched in beach or backyard with hand tools and locally-available materials. Major asset for remote ocean cruising vs. production fiberglass cats requiring yard infrastructure.
Lashed-not-bolted hull-to-crossbeam connection is intentionally flexible — distributes load gradually, avoids bolt-fatigue failure common to rigid catamaran connections.
Engaged owner community + Wharram Designs institutional support since the 1960s. Class-specific knowledge is well-shared.
Known trade-offs
Quality varies hull-by-hull — at Pahi 52 size, build errors have larger consequences (more load, larger surface area, more systems). Build provenance + materials documentation are non-negotiable. Build-time hidden defects can persist for decades until stressed.
Plywood-epoxy hulls have a finite lifespan dominated by moisture ingress; large surface area increases the inspection burden and the cost-to-recover from a weak epoxy schedule history.
Resale market is very thin at this size + price point — niche buyer pool and long marketing periods are typical.
Few hulls means few comparable sales — pricing is reference-poor and tends to bracket widely (a well-built example can ask 3-5× what a tired one fetches).
Age-related quirks to expect
Owner-built quality variance — every Pahi 52 is effectively bespoke; survey must assess THIS hull, not class priors. Larger size amplifies the consequences of build errors.severity: Highaffects: all (owner-built)
Plywood-epoxy hull moisture susceptibility — breached epoxy + persistent moisture = plywood rot; large hull surface area increases inspection burdenseverity: Highaffects: all (age + maintenance-driven)
Lashed crossbeam attachment — larger crossbeams, longer lashing runs; inspection and replacement schedule unchanged but each cycle is more involvedseverity: Mediumaffects: all (architectural)
Wharram-specific rig — typically schooner or twin-mast configurations at this size; specialist sailmaking and rigging knowledge requiredseverity: Lowaffects: all (architectural)
The single highest-risk system on any Wharram, and Pahi 52 surface area is substantial. Inspect epoxy hot-coat condition (UV chalking), plywood-stitch joint integrity at hull seams, glass-sheathing delamination around through-fittings and waterline. Moisture-meter survey of every hull section is mandatory. Builder logs + materials provenance matter enormously — often incomplete for older or multi-owner hulls.
Hulls joined to crossbeams with synthetic-line lashings, not bolts. Larger Pahi crossbeams handle more load; lashing inspection annually and replacement every 5-10 years is non-negotiable. A failed lashing offshore is a catastrophic failure mode unique to Wharrams. Inspect crossbeam saddles + lashing channels for wear and moisture ingress.
At Pahi 52 size the rig is often twin-mast (schooner) or large single-stick — class-specific in both cases. Consult Wharram Designs or experienced Wharram riggers; generic-yard quotes are often inappropriate. Soft-wing sail conversions exist and add specialist sailmaking knowledge requirements.
Auxiliary propulsion (typically twin inboards or large outboards)priority: offshore, coastal, liveaboard
At this size, twin small inboards (15-30hp diesels) are common; some hulls use larger outboards. Verify configuration. Inboard installations involve cutting structural plywood and should be inspected for surrounding laminate integrity, fuel-tank corrosion, and shaft-log moisture ingress.
How it fits your plans
Offshore
Designed for it. Larger Pahi = more comfortable extended-range platform. Caveats: owner-built quality variance is the dominant risk; lashing regime + plywood-epoxy moisture management are non-negotiable. A well-built Pahi 52 is a credible long-voyage cruiser.
Coastal
Workable but oversized for purely coastal use. Wide beam often exceeds marina slip allowances; haul-out for large multihulls is a challenge in many regions.
Liveaboard
Strong. More accommodation than the Pahi 42; still no enclosed saloon between hulls — living is in the hulls + a deck-tent or hard-top over the open bridge platform. Family cruising is feasible.
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 Pahi 52 — 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.