Design and Construction
The 435 is a 100% aluminium sailing boat, with hull, deck and structure welded from marine-grade alloy rather than any composite panel. Alubat's method since 1973 has been to cut aluminium plates on CNC tables and weld them inside and out over a jig, and the 435 shows that lineage in a hull carried on a matrix of frames and stringers that owners describe as massively strong. The builder's standard insulation is Styrodur, and at least one owner had the hull and deck insulated down to the waterline at build; the material gives the aluminium a thermal break that matters in high-latitude cruising. The keel is an integral centreboard lifted on a hydraulic system, and the rudder is a single spade that also lifts, giving the boat the ability to take the ground and enter shallow marinas at a raised draft of roughly 0.74 to 0.84 metre depending on load.
Rig and Handling
The 435 is built with a cutter rig, and the example Pèlerin shows what that means in practice: a high-cut Yankee on a roller and a conventionally hoisted staysail that can be reefed, making a true three-sail foretriangle. The fully battened main runs on a Harken track with single-line reefing led to the cockpit, and the sail carries three reefs at larger-than-standard spacing so the third is effectively not much larger than a trysail; a hanked-on storm jib rounds out the heavy-weather inventory, though no trysail is carried. Upwind sail area is listed at 95 m² (35 m² main, 60 m² genoa), while a working sail plan measures about 99 m². A lightweight No 1 genoa sets on a stay just aft of the roller for light airs, and an asymmetric spinnaker flies from a detachable bowsprit on a gennaker furler. One power-driven winch handles all halyards, and the engine sits very low in the hull to assist stability. Writing in Attainable Adventure Cruising, the longtime owners of Pèlerin found her not at all demanding to sail and blessed with a very comfortable motion.
Accommodations
Below, the 435 is laid out with two double cabins and two bathrooms, plus a technical room that houses the generator and stores gear. The saloon is described by the builder as very convivial, and the chart table faces the direction of travel — a small but telling detail for a passage-making boat. The owner account of Pèlerin notes the interior is very light and airy, consistent with the aluminium hull's large windows and the build-stage insulation. Fresh water is carried in a 280 L tank plus an added 180 L, and fuel in two 150 L tanks plus a 70 L auxiliary, giving real autonomy for extended cruising.
Known Issues
The Volvo-seal stern gland on Pèlerin needs to be "burped" every time the boat is dried out, a maintenance step any owner who beaches or lifts the keel must observe. That owner installed an isolation transformer soon after delivery to address electrolysis problems traced to shore power, and the boat is fitted with a leak meter that detects any current bleed through the 12V system — a useful guard on an all-metal hull wired for liveaboard loads.
Refits and Ownership
Standing rigging on at least one 435 was replaced in 2022, a normal mid-life item on a boat of this age. Pèlerin carries a mix of owner-chosen equipment — a Spectra Ventura 150 watermaker, a Superwind wind generator, Webasto blown-air diesel heat, Simrad integrated navigation with radar and AIS, and a Windpilot Pacific windvane — that shows how the technical compartment and 600 L water capacity support serious off-grid cruising. The engine on the spec boat is a Yanmar 4JH3E of 56 CV, while Pèlerin wears a Volvo D2-55D; both are moderate 55-ish horsepower diesels suited to the 10.3-tonne displacement.
The Verdict
The Ovni 435 is a thoughtfully realised aluminium cruiser that trades a little interior polish for groundability, strength, and a rig any couple can handle. Its lifting centreboard and rudder open anchorages closed to fin-keelers, and the cutter configuration with reefable staysail and deep third reef is honest offshore kit. The all-aluminium hull asks for vigilance on electrolysis but rewards it with a structure that shrugs off grounding.
Pros
- All-aluminium welded hull with frame-and-stringer matrix for immense strength
- Hydraulic lifting centreboard and rudder for true shoal draft and drying out
- Cutter rig with reefable staysail and three-reef main handled from the cockpit
- Convivial saloon, two doubles, two heads, and a dedicated technical room
Cons
- Volvo-seal stern gland requires burping after every drying-out
- Shore-power electrolysis demands an isolation transformer and leak monitoring
- No longer built; spares and lineage now sit with the later Ovni 445
