CNSO Aikido Information, Review, Specs

Sailing Performance & Handling

The Aikido is characterized by a traditional underwater profile, featuring a deep fin keel and a substantial skeg-hung rudder. This configuration offers a level of directional stability and "tracking" that modern, wide-beamed cruisers frequently sacrifice for internal space. While technical ratios for the Aikido place it firmly in the cruiser category, its performance in a blow is where the Michel Bigoin pedigree becomes evident. The boat is notably "stiff," meaning it resists excessive heeling and carries its sail area well into Force 4 and 5 conditions before a reef is necessitated.

Anecdotal reports from long-term owners and historical technical summaries suggest that while the Aikido is not a light-wind specialist—due to its relatively high displacement-to-length ratio—it excels in offshore conditions. The hull’s sharp entry and moderate beam allow it to slice through head seas with minimal slamming. Handling is described as heavy but predictable; the skeg-hung rudder provides a dampened, secure feel at the helm, which is particularly advantageous when sailing short-handed or in following seas where spade rudders might feel flighty.

Interior Comfort & Variations

The interior of the Aikido reflects the functionalism of 1970s French yachting. With a beam of approximately 2.90 meters, the salon is cozy rather than cavernous. The layout typically follows a standard plan: a V-berth in the bow, a marine head and hanging locker separating the cabin from the salon, and twin longitudinal settees that serve as sea berths. The galley and a small navigation station are located at the base of the companionway to maximize ventilation and accessibility.

Unlike its larger sibling, the Karate 33, which was available in an aft-cabin (MK1) configuration, the Aikido remained largely consistent in its layout. Variations are primarily found in the choice of auxiliary power and the evolution of the deck mold; earlier models featured more prominent wooden brightwork, while later iterations toward the late 1970s incorporated more molded fiberglass liners to simplify maintenance. The use of mahogany veneers and solid wood trim in the cabin provides a warmer aesthetic than the "all-white" interiors of modern mass-production boats, though buyers should note that headroom is approximately 1.80 meters, which may feel tight for taller sailors.

Known Issues & Buyer’s Checklist

Prospective buyers of an Aikido should approach the vessel with an understanding of its age and the construction techniques of the early 1970s.

• Osmotic Blistering: Like many early French fiberglass boats, the Aikido is susceptible to osmosis. While rarely structural in these thick-laid hulls, a moisture meter test and a haul-out inspection are essential to determine if the hull requires a barrier coat or stripping.
• Deck Core Integrity: CNSO used balsa or plywood coring in the deck structures for stiffness. Areas around stanchion bases, the mast step, and chainplates are prone to water ingress. Spongy sections underfoot or brown weeping near interior bolts indicate a compromised core.
• Rudder Bushings and Skeg: The skeg-hung rudder is a safety feature, but the bushings can wear over fifty years, leading to "clunking" or vibration. Additionally, the attachment point where the skeg meets the hull should be inspected for stress cracks.
• Original Engines: Many Aikidos were originally fitted with Renault Couach or early Volvo Penta engines. Parts for these specific older units are increasingly difficult to source, and many hulls on the market have been (or should be) repowered with modern Yanmar or Beta Marine diesels.
• Chainplates: The hardware is robust, but the sealant is likely decades old. Inspect the bulkheads to which the chainplates are bolted for signs of rot or water staining.

Community & Resources

The primary hub for technical support is the Club des Amis Propriétaires de Karaté, which serves as a collective resource for all Michel Bigoin-designed CNSO yachts. Although the name highlights the Karate model, the association maintains archives and technical drawings that are highly relevant to Aikido owners, particularly regarding rigging specifications and hull maintenance.

The Verdict

The CNSO Aikido is a "sailor’s boat"—a robust, honest cruiser that prioritizes sea-kindliness over marina-side entertaining. It is an ideal choice for those looking to venture into coastal or mid-range offshore cruising on a modest budget.

Pros:

• Exceptional Durability: The solid fiberglass hull is over-engineered by modern standards.
• Seaworthy Design: High directional stability and stiff sailing characteristics.
• Pedigree: Designed by Michel Bigoin, ensuring sound naval architecture.
• Affordability: Offers a 30-foot offshore-capable platform at a lower price point than contemporary Beneteaus or Jeanneaus.

Cons:

• Age-Related Maintenance: Buyers must be prepared to address decades of wear in the wiring, plumbing, and engine.
• Limited Interior Volume: Narrow beam and traditional layout feel cramped compared to modern 30-footers.
• Light Wind Performance: The heavy displacement requires a decent breeze to get the hull moving effectively.