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Sailboat Specifications

S2 85 Sd

Masthead Sloop · Fin W/Spade Rudder

Designed by Arthur Edmunds · First built 1980

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LOA 28.00 ft  ·  Beam 9.50 ft  ·  Displacement 7,600.00 lb  ·  Sail Area 390.00 ft²  ·  Masthead Sloop  ·  Fin W/Spade Rudder
About the S2 85 Sd Sailboat

Produced by S2 Yachts, a Michigan-based builder with a strong reputation for quality construction throughout the 1970s and 1980s, the S2 85 Sd represents the kind of thoughtful American sailboat design that defined recreational sailing during that era. S2 Yachts was known for building well-finished, performance-oriented boats that appealed to sailors looking for a capable vessel without sacrificing comfort. The 85 Sd fits comfortably into the category of coastal and weekend cruising, offering a manageable platform for sailors who want to explore near-shore waters with confidence. S2's design philosophy typically emphasized solid hull construction, responsive handling, and practical layouts that work well for couples or small families. The "Sd" designation suggests a specific deck or sail configuration variant within the model line, which was common practice for builders offering multiple options to buyers. For those researching a used boat purchase, the S2 brand generally carries a positive reputation among owners for durability and ease of maintenance. Prospective buyers would benefit from a thorough survey, as with any vintage fiberglass sailboat, but the S2 legacy offers a reassuring foundation.

Dimensions & Specifications
LOA (Length Overall) 28.00 ft / 8.53 m
LWL (Waterline Length) 22.50 ft / 6.86 m
Beam 9.50 ft / 2.90 m
Max Draft 3.92 ft / 1.19 m
Displacement 7,600.00 lb / 3,447 kg
Ballast 3,000.00 lb / 1,361 kg
Sail Area (Reported) 390.00 ft² / 36.23 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Arthur Edmunds
First Built 1980
Related Sailboats S2 86 · S2 86 Sd · S2 85 · Aloha 85 · Ericson 28 2
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Frequently Asked Questions

What is the S2 85 Sd's sail area to displacement ratio?

The S2 85 Sd has a Sail Area to Displacement ratio (SA/D) of 16.19. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the S2 85 Sd's comfort ratio?

The S2 85 Sd has a Ted Brewer Comfort Ratio of 24.24. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the S2 85 Sd safe for offshore sailing?

The S2 85 Sd has a Capsize Screening Formula value of 1.94. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the S2 85 Sd?

The theoretical hull speed of the S2 85 Sd is 6.36 knots, calculated from its waterline length.

How much does a S2 85 Sd weigh?

The S2 85 Sd has a displacement of 7,600.00 lb and a length overall (LOA) of 28.00 ft.

Who designed the S2 85 Sd?

The S2 85 Sd was designed by Arthur Edmunds, first built in 1980.