Sigma 36 (S&S) Information, Review, Specs

The story of the Sigma 36 begins in 1968, marking its entry into the flourishing sailboat market of the late 1960s. Designed by the renowned naval architecture firm Sparkman & Stephens, the Sigma 36 (S&S) reflects their philosophy of creating swift, seaworthy yachts. Sparkman & Stephens were known for their elegant and performance-driven designs, and the Sigma 36 was intended to have a "significantly more speedy hull design." This model is part of a series of related designs by S&S, including the influential Swan 36, which suggests a focus on performance for its era.

The builder, Cheoy Lee Shipyard, played a crucial role in bringing the Sigma 36 to life. By the mid-1960s, Cheoy Lee, a family-owned shipyard with over a century of experience, had become a pioneer in fiberglass boatbuilding. They were among the first to extensively develop, test, and utilize fiberglass (GRP) and foam sandwich technology in marine construction, recognizing its advantages in weight savings, strength, and longevity. This commitment to robust construction with innovative materials defined Cheoy Lee's manufacturing ethos during the period the Sigma 36 was produced. While specific variations like MkI or MkII are not widely documented for this particular model, the core S&S design was also produced by other European manufacturers.

Sailing Performance and Handling

The Cheoy Lee Sigma 36 (S&S) is characterized by a design that prioritizes stability and moderate performance. With a reported sail area of 545 square feet and a displacement of 15,000 pounds, its sail area to displacement ratio (SA/D) of approximately 14.36 suggests a boat that is not excessively powered for light air but should handle well in moderate to strong breezes. Its substantial ballast of 7,800 pounds, contributing to a ballast to displacement ratio (B/D) of 0.52, indicates a remarkably stiff and stable vessel, capable of standing up to significant wind without excessive heel. This high ballast ratio is a hallmark of a robust offshore design, ensuring a comfortable motion in a seaway.

The displacement to length ratio (D/L) of around 274.55 places the Sigma 36 in the moderate-to-heavy displacement category, leaning towards a traditional cruiser rather than a light, ultra-performance racer. This suggests a boat with good momentum, capable of carrying stores for extended cruising, and a generally comfortable ride in varied conditions. Owners have praised the Sigma 36 for its "good sea handling" and being "easy to maneuver." Its fin keel and skeg-hung rudder contribute to responsive steering and efficient performance, aligning with the "speedy hull design" noted by its designer.

Accommodations and Layout

While specific interior details for the Cheoy Lee Sigma 36 (S&S) are not extensively cataloged in the provided data, a typical layout for a performance cruiser of this era would focus on functionality and seaworthiness. General information for similar Sigma 36 models, such as those designed by David Thomas, often describe accommodations that can sleep multiple people, with a forward V-berth cabin, a marine head, and a saloon area. The saloon typically features settees that can double as berths, alongside a galley and navigation station.

Owner insights into boats from this period and builder, like the Luders 36, indicate that while interiors might be functional, issues such as engine access could sometimes be a consideration. However, Cheoy Lee's reputation for quality craftsmanship suggests that the finish, often featuring wood trim, would have been robust for its time. Owners of Sigma 36s have noted that the interior, while functional, may not offer "huge amounts of stowage," particularly in comparison to more dedicated cruising boats. Modern upgrades by owners often include LED lighting, enhancing the living space.

Owner's Perspectives

Owners of the Cheoy Lee Sigma 36 generally appreciate its solid construction and sailing capabilities. Many describe the boat as powerful, with good sea handling characteristics and easy maneuverability, making it suitable for both coastal and offshore sailing. The robust build quality, a consistent trait of Cheoy Lee vessels from this era, is frequently highlighted as a significant strength.

A common theme among owners of older yachts like the Sigma 36, and indeed Cheoy Lee boats with original teak decks, is the potential for deck leaks requiring re-bedding or even replacement with fiberglass. While some owners mention that stowage might not be extensive, the overall sailing performance and the feeling of security offshore are consistently praised. The Sigma 36 is considered a capable and enjoyable boat for those who appreciate a well-built, performance-oriented cruiser.