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1970 Nautor Swan Swan 37

Listed
Expired
$65,000 USD

Seller's Description

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;

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Specs

Designer
Sparkman & Stephens
Builder
Nautor (Swan sailboats)
Association
One Ton Class
# Built
59
Hull
Monohull
Keel
Fin
Rudder
Skeg
Construction
FG

Dimensions

Length Overall
37 0 / 11.3 m
Waterline Length
27 3 / 8.3 m
Beam
10 0 / 3.1 m
Draft
6 0 / 1.8 m
Displacement
15,400 lb / 6,985 kg
Ballast
7,300 lb / 3,311 kg

Rig and Sails

Type
Sloop
Reported Sail Area
598′² / 55.6 m²
Total Sail Area
598′² / 55.5 m²
Mainsail
Sail Area
237′² / 22 m²
P
40 5 / 12.3 m
E
11 8 / 3.6 m
Air Draft
?
Foresail
Sail Area
361′² / 33.5 m²
I
46 3 / 14.1 m
J
15 7 / 4.8 m
Forestay Length
48 9 / 14.9 m

Auxilary Power

Make
Volvo Penta
Model
MD2B
HP
25
Fuel Type
Diesel
Fuel Capacity
26 gal / 98 l
Engine Hours
?

Accomodations

Water Capacity
48 gal / 182 l
Holding Tank Capacity
?
Headroom
?
Cabins
3

Calculations

Hull Speed
7.0 kn
Classic: 7.0 kn

Hull Speed

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.

Formula

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

7.04 knots
Classic formula: 7.0 knots
Sail Area/Displacement
15.5
<16: under powered

Sail Area / Displacement Ratio

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.

Formula

SA/D = SA ÷ (D ÷ 64)2/3

  • SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D: Displacement in pounds.
15.46
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
47.4
>40: stiffer, more powerful

Ballast / Displacement Ratio

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.

Formula

Ballast / Displacement * 100

47.4
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
339.2
275-350: heavy

Displacement / Length Ratio

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.

Formula

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
339.23
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
33.6
30-40: moderate bluewater cruising boat

Comfort Ratio

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.

Formula

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
33.63
<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
1.7
<2.0: better suited for ocean passages

Capsize Screening Formula

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.

Formula

CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
1.71
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

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’

This listing is presented by SailboatListings.com. Visit their website for more information or to contact the seller.

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