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Dulcinea is hull 17 of the 37 Swan that dominated ocean racing in 1970-71. With her pronounced tumblehome and low windage profile, Dulcinea is a beautiful Sparkman & Stephens design with Nautor heirloom quality. Built in Finland of hand-laid solid fiberglass she has the classic S&S lead fin keel and separate skeg rudder that provides excellent upwind performance and fast, sea kindly passage making. She is documented with the U.S. Coast Guard. She has been in fresh water since 1984. She has the traditional layout with V-berth forward, heads & hanging locker next aft, saloon with folding table and two settees/berths, galley to starboard, full-size chart table to port, and 2 single quarterberths aft. Some upgrade highlights since 2000 include: Sails: North roller furling genoa (2016), North asymmetric (2007), North main (2019); four older symmetric spinnakers; #2, #3, #4, staysail; drifter; trysail; storm jib; all new running rigging (2002-2019); Yanmar 3GMD 3-cylinder diesel: new starter, new high-output Balmar alternator & regulator, all new exhaust; all new hoses; new prop shaft & cutlass bearing & feathering MaxProp; On Deck: all winches replaced with self-tailing chromed bronze winches(9), all new Type-316 rigging & lifelines (2001), new gooseneck & boom (2001), new Garhauer rigid vang, new Harken traveler & mainsheet blocks, new binnacle guard protecting original antique Sestrel Major compass; new Raymarine ST60 Wind, Speed, Depth, Graphic(2); new bow pulpit and anchor roller, new dodger, new non-skid, new two-part Interlux Perfection to cabin & deck; new barrier coats to the bottom; Below: teak & holly sole and standing headroom throughout; all new AC, DC, coax, and instrument wiring (including mast), new redundant Raymarine below-deck autopilots (2) with wired and wireless remotes, new VHF with DSC, AIS, GPS, all LED lights; new battery combiner, new battery charger: all new plumbing & Raritan toilet & holding tank, all new Blakes bronze seacocks (5), all new propane system for original Luke stove, new Ultrasuede upholstery
Equipment: Sails: North roller furling genoa (2016), North asymmetric (2007), North main (2019), four symmetric spinnakers; #2, #3, #4, staysail; drifter; trysail; storm jib;
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
SA/D = SA ÷ (D ÷ 64)2/3
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Ballast / Displacement * 100
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
CSV = Beam ÷ ³√(D / 64)
S&S #2035.
Sold also as PALMER JOHNSON 37 (S&S #2035.1). Intended for racing at the IOR 1 ton level at the time.
A number of other custom boats (from other builders) were built to this same design.
Some delivered with a taller rig.
Tall Rig:
I: 49.0’
J: 15.8’
P: 43.0’
E: 12.0’
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