Simoun 485 Information, Review, Specs

Sailing Performance & Handling

The Simoun 485 is characterized by its agility and its ability to plane early compared to heavier day cruisers of its era. With a hull length of approximately 15 feet 11 inches (4.85 meters) and a relatively generous beam of 6 feet 1 inch (1.85 meters), it offers a more stable footing than the 470 Olympic class, which it was often compared to in the French market. This stability makes it an excellent platform for two sailors, though it can be handled solo in light to moderate winds by an experienced helm.

The boat features a fractional sloop rig with a high-aspect-ratio mainsail and a jib that provides significant drive. Because of its light displacement (approximately 140kg dry), the 485 is sensitive to crew weight placement; proper "hiking" is essential to keep the flat-bottomed hull at its optimal plane. The inclusion of a trapeze for the crew allows the 485 to stand up to stiffer breezes, where it truly comes alive. Technical documentation from the Association des propriétaires de Simoun 445 et 485 suggests that while the 485 is not as twitchy as a dedicated racing skiff, it rewards technical sail trim with impressive bursts of speed, particularly on a broad reach under its symmetrical spinnaker.

The sibling models built on or inspired by this hull architecture include the Simoun 445 (the shorter, lighter predecessor) and the more specialized Simoun 485 S (Sport), which often featured reinforced hardware and more aggressive sail cuts. Some rare variants of the 485 were produced with slightly different deck layouts to accommodate "Club" versus "Private" use, with the latter often featuring more adjustable trim lines led aft to the helmsman.

Popular Mentions & Media

While the Simoun 485 never reached the global saturation of the Laser or the 420, it holds a prestigious place in European sailing history, particularly within France’s "Union Nationale des Centres de Plein Air" (UCPA) and various national sailing federations. It was frequently featured in 1970s and 80s editions of the French magazine Bateaux, where it was praised for its durability in rental fleets. In the modern era, the boat appears frequently in vintage regatta circuits across the Atlantic coast of France and on major European lakes, where its classic lines and "retro-cool" fiberglass aesthetic have earned it a dedicated following among restoration enthusiasts.

Known Issues & Buyer’s Checklist

The Simoun 485 is a robustly built dinghy, but its age means that certain structural areas require close inspection.

• Double Bottom Integrity: The most critical check is the seal between the hull and the inner deck mold. If the sealant has perished or the hull has suffered impact damage, water can migrate into the "air tank" between the skins. This not only adds significant weight but can lead to internal delamination.
• Mast Step Compression: The mast step on the 485 sits on a reinforced section of the deck. Over decades of high rig tension, this area can exhibit "spiderweb" crazing or slight depression. Any significant sinking of the mast step indicates a failure of the underlying support structure.
• Centerboard Trunk: Like many dinghies of this era, the centerboard trunk is a high-stress area. Inspect for vertical cracks at the leading and trailing edges of the trunk, which can lead to leaks.
• Rudder Gudgeons: The transom-mounted gudgeons (the brackets that hold the rudder) can work loose over time. Ensure the backing plates are secure and that there is no "play" in the transom fiberglass, which suggests core rot or fatigue.

Community & Resources

The primary hub for technical support is the Association des propriétaires de Simoun 445 et 485, which maintains an archive of original rigging diagrams, tuning guides, and historical brochures. This association is the best resource for sourcing or fabricating replacement parts that are no longer in commercial production. Additionally, the French heritage site Vieux Safrans occasionally features technical deep-dives into Gouteron’s plywood-to-fiberglass transition, which is vital for owners of the earliest hull numbers.

The Verdict

The Simoun 485 remains a charming and capable "all-rounder" that bridges the gap between a pure racing dinghy and a family daysailer.

Pros:

• Exceptional Safety: The self-bailing double bottom is a significant advantage for coastal sailing and safety-conscious sailors.
• Performance: Capable of exhilarating planing speeds in moderate to heavy air.
• Durability: Built during an era when fiberglass layups were often thicker and more robust than modern mass-produced equivalents.

Cons:

• Weight: At roughly 140kg, it is heavier than many modern 15-footers, making it difficult to launch solo from a soft beach.
• Parts Availability: Unique Gouteron hardware can be difficult to find, often requiring custom fabrication or adaptation of modern Harken/Ronstan fittings.
• Complexity: The rig and trapeze setup may be intimidating for absolute beginners compared to a simple unstayed-mast dinghy.