The Swan 40, a masthead sloop, was designed by Sparkman & Stephens and built in Sweden by Nautor Swan.
Underwater Profile: Fin keel and skeg-hung rudder
Hull Material: GRP (Fiberglass)
Length Overall: 39'3" (12.00m)
Waterline Length: 28'6" (8.7m)
Beam: 10'10" (3.3m)
Draft: 6'8" (2.1m)
Rig Type: Masthead Sloop
Displacement: 19,000lb (8,618kg)
Designer: Sparkman & Stephens
Builder: Nautor Swan
Year First Built: 1970
Year Last Built: 1972
Number Built: 51
Owners Association: S&S Swan Association
1. Sail Area/Displacement Ratio: 16.0
2. Ballast/Displacement Ratio: 41.6
3. Displacement/Length Ratio: 365
4. Comfort Ratio: 38.7
5. Capsize Screening Formula: 1.6
read more about these all-revealing numbers...
1. A Sail Area/Displacement Ratio of 16.0 suggests that the Swan 40 will, in the right conditions, approach her maximum hull speed readily and satisfy the sailing performance expectations of most cruising sailors.
2. A Ballast/Displacement Ratio of 41.6 means that the Swan 40 will stand up well to her canvas in a blow, helping her to power through the waves.
3. A Displacement/Length Ratio of 365, tells us the Swan 40 is firmly in the ultra-heavy displacement category. Load her up as much as you like and her performance will be hardly affected, not that it was ever startling. Few if any sailboats are built to this displacement category these days - but they remain popular with some long-distance sailors.
4. Ted Brewer's Comfort Ratio of 38.7 suggests that crew comfort of a Swan 40 in a seaway is similar to what you would associate with the motion of a moderate bluewater cruising boat - a predictable and acceptable motion for most seasoned sailors.
5. The Capsize Screening Formula (CSF) of 1.6 tells us that a Swan 40 would be a considerably safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0.
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