Simoun 445 Information, Review, Specs

Simoun 445 Drawing
Make
Simoun
Model
445
Builder
Chantier Gouteron
Designer
Yves Loday
Number Built
Production Year(s)
1960 - 1997

The Simoun 445, a cornerstone of French dinghy sailing history, was born from a desire to democratize the sport during the 1960s. Designed by the acclaimed naval architect Yves Loday and manufactured by Chantiers Gouteron, this 4.45-meter (14'7") monohull was engineered as a direct competitor to the ubiquitous International 420. While the 420 leaned toward the racing circuit, the Simoun 445 carved out its niche by offering a more stable, versatile platform that appealed equally to racing clubs and family day-sailers. Its most revolutionary feature at the time of launch was the 100% self-bailing double bottom. This design allowed the boat to shed water instantly after a capsize or when launching through surf—a significant safety advancement that solidified its role in European sailing schools for decades. The boat's construction transitioned from early experimental bent plywood to the robust fiberglass layup that defines the majority of the fleet today, as noted in the historical archives maintained by the Association des Propriétaires de Simoun 445 et 485.

Sailing Performance & Handling

The Simoun 445 is a fractional sloop designed to be sailed by a crew of two, typically utilizing a trapeze and a symmetric spinnaker for competitive use. With a high sail area to displacement ratio (S.A./Disp of approximately 51.4), it is a responsive and lively performer that comes alive in a moderate breeze. Unlike many narrower dinghies of its era, the 445 features a relatively generous beam of 1.77 meters, providing a higher degree of initial stability. This makes the boat particularly well-suited for heavier crews or beginners who might find a 420 too "twitchy."

Handling is characterized by its predictable tracking and forgiving nature. However, editorial reviews from Bateaux.com suggest that the hull can be sensitive to weight distribution; in light air, the transom has a tendency to drag if the crew sits too far aft, requiring a disciplined forward trim to keep the wetted surface area to a minimum. Once on a plane, the 445 is remarkably stable for its size, with the double bottom providing a rigid feel to the hull that enhances power transfer from the rig. The boat’s siblings, such as the larger Simoun 485 and the smaller Mowgli, share this hull DNA, with the 485 offering even more power and cockpit space for those seeking a dedicated coastal cruiser.

The Simoun 445 holds a place of cultural significance in the "Golden Age" of French sailing. It was a staple of the famous Glénans sailing schools and appeared frequently in European nautical periodicals throughout the 1970s as the quintessential "school boat." While it has transitioned from a primary racing class to a beloved vintage dinghy, it remains a frequent subject of restoration blogs and classic boat rallies in Western Europe.

Known Issues & Buyer’s Checklist

Prospective buyers of a vintage Simoun 445 should focus on several specific structural areas that are known to degrade over time:

  • Internal Wood Rot: The most critical "gotcha" for this model is the condition of the wooden stringers (reinforcements) located between the hull and the double bottom. If water has been trapped in the air tank or double bottom for extended periods, these stringers can rot. Since they are inaccessible without cutting the deck open, this is often a terminal issue. Check for soft spots on the cockpit floor or a "spongy" feel when walking on the deck.
  • Mast Step Compression: The mast step sits atop the double bottom. Over decades of high rig tension, the support structure beneath the step can weaken. Inspect the area for cracks or sagging.
  • Centerboard Trunk Leaks: Like many dinghies of this age, the gasket (or "flap") at the bottom of the centerboard trunk may be worn or missing, leading to excessive turbulence and water entering the cockpit.
  • Hardware Backing: Earlier Gouteron models occasionally lacked substantial backing plates for high-load hardware like the jib tracks or shroud chainplates. Inspect for star-crazing in the gelcoat around these attachment points.

Community & Resources

The primary authority for the model is the Association des Propriétaires de Simoun 445 et 485, which serves as a technical repository for original sail plans, rigging diagrams, and historical brochures. Owners often congregate on French nautical forums such as ForumVoile to discuss restoration techniques and source rare hardware.

The Verdict

The Simoun 445 remains a superb choice for sailors seeking a vintage dinghy that prioritizes safety and stability without sacrificing the thrill of planing performance.

Pros:

  • Safety: The self-bailing double bottom makes it exceptionally easy to right and clear after a capsize.
  • Stability: A wider beam provides a more stable platform for families and novice sailors than most racing dinghies.
  • Durability: The fiberglass hulls are generally overbuilt and can withstand significant use if kept dry.

Cons:

  • Weight: It is heavier than modern performance dinghies, making it more difficult to launch and recover single-handedly.
  • Hidden Rot: Internal wooden reinforcements are a known failure point that is difficult to inspect and nearly impossible to repair.
  • Age: Finding class-legal racing sails or original hardware can be challenging outside of France.

Measurements

Construction & Hull

Construction Material
Fiberglass
Hull Type
Monohull Sailboat
Keel Type
Centerboard
Rudder
1x —
Ballast
-
Displacement
243 lbs
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
14.44 ft
Waterline Length (LWL)
13.94 ft
Beam
5.45 ft
Draft
3.18 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

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

Calculations

Sail Area / Displacement (SA/D) Ratio
51.36
Ballast / Displacement Ratio
Displacement / Length Ratio (D/L) Ratio
40.05
Comfort Ratio
2.78
Capsize Screening Formula
3.49
Hull Speed
5 kn