Sol Cat 18 Information, Review, Specs

Sailing Performance & Handling

The Sol Cat 18 is defined by a high power-to-weight ratio, categorized by its ultra-light displacement-to-length (D/L) ratio of approximately 25. This allows for rapid acceleration and the ability to "fly a hull" in relatively light air. Unlike the skeg-dependent cats of its day, the Sol Cat 18’s twin daggerboards provide a deeper bite into the water, significantly improving its tacking ability and weatherly performance. The rig is a fractional sloop with a rotating spar, a setup that enables precise sail shaping for varied wind conditions.

On the water, the boat is often described as lively but demanding. While it excels in flat water, sailors have noted that the trampoline sits relatively low between the hulls. In heavy chop, this can lead to "tramp slap," where the underside of the trampoline hits the waves, creating drag and a wetter ride than more modern high-clearance designs. Furthermore, historical anecdotes from racing forums suggest that the boat is famously difficult to right after a capsize due to its structural weight and hull volume; it often requires a substantial crew weight or a significant assist from the wind to return to an even keel.

Known Issues & Buyer’s Checklist

Prospective owners should approach the Sol Cat 18 with a focus on structural longevity, as these boats are now several decades old.

• Hull Delamination: Like many fiberglass boats from the 1970s, Sol Cats are prone to "soft spots," particularly on the decks and forward of the mast step. This is often caused by the breakdown of the internal core material or water ingress between the glass layers.
• Daggerboard Trunks: The high loads placed on the daggerboards can lead to stress cracks or leaks at the trunk-to-hull joints. Inspect these areas for signs of previous repairs or structural flexing.
• Mast Step & Crossbar Integrity: The compression loads from the rotating mast are transferred through the forward crossbar. Check for any sagging in the beam or corrosion around the mast step casting.
• Hardware & Parts Availability: Since Sol Catamarans folded in 1984, sourcing original hardware is nearly impossible. Many owners resort to adapting Hobie or Nacra parts, but unique items like rudder castings require careful inspection for hairline cracks, as replacements are non-existent.

Community & Resources

The primary hub for technical support and archival data is TheBeachcats.com, an extensive technical wiki and owner resource that hosts scans of the original Sol Cat 18 brochures and rigging guides. While a formal factory-backed association no longer exists, the boat maintains a presence in the Small Catamaran Handicap Rating System (SCHRS), where it continues to be assigned competitive ratings for mixed-fleet racing.

The Verdict

The Sol Cat 18 is a vintage speedster that offers a more refined sailing experience than simpler beach cats of its era, provided the crew is prepared for the maintenance requirements of an orphaned brand.

Pros

• Excellent upwind performance thanks to symmetrical hulls and daggerboards.
• More durable fiberglass layup than many contemporary lightweight competitors.
• Classic 1970s aesthetic that stands out in a field of modern rotomolded boats.

Cons

• Extremely difficult to right solo or with a light crew after a capsize.
• Prone to "tramp slap" in heavy seas due to low bridge deck clearance.
• Finding replacement parts requires significant DIY ingenuity and adaptation.