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Seller's Description

This Gulfstar Sailmaster is designed for sailing and cruising. Outfitted for comfort, the galley and dining area have lots of storage along both sides,

The L-shaped settees convert into a double berth when not in use for dining. The galley is nicely laid out and has a double sink, 2 Engel refrigerator/freezers, microwave, stove with oven, lots of counter space cabinets, and an updated countertop.

There is a nav station with a chart table and seat, a head with dual entrance, stand-up separate shower with standing headroom.

Powered by a dependable Perkins Diesel you will always have the confidence to get in and out of port or make your way when winds are light.

Ready for the next adventure, this Gulfstar will take you there!

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Specs

Designer
Vince & Richard Lazarra
Builder
Gulfstar Yachts
Associations
?
# Built
57
Hull
Monohull
Keel
Fin
Rudder
Skeg
Construction
FG w/balsa cored deck & topsides

Dimensions

Length Overall
39 6 / 12.1 m
Waterline Length
32 4 / 9.9 m
Beam
12 0 / 3.7 m
Draft
4 9 / 1.5 m
Displacement
19,000 lb / 8,618 kg
Ballast
8,200 lb / 3,719 kg (Lead)

Rig and Sails

Type
Cutter
Reported Sail Area
684′² / 63.6 m²
Total Sail Area
683′² / 63.5 m²
Mainsail
Sail Area
295′² / 27.5 m²
P
40 8 / 12.4 m
E
14 6 / 4.4 m
Air Draft
?
Foresail
Sail Area
388′² / 36 m²
I
47 0 / 14.3 m
J
16 6 / 5 m
Forestay Length
49 9 / 15.2 m

Auxilary Power

Make
Perkins
Model
4-108
HP
50
Fuel Type
Diesel
Fuel Capacity
80 gal / 303 l
Engine Hours
?

Accomodations

Water Capacity
150 gal / 568 l
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
8.5 kn
Classic: 7.63 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

8.45 knots
Classic formula: 7.63 knots
Sail Area/Displacement
15.4
<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.
15.37
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
43.2
>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

43.15
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
249.0
200-275: moderate

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
249.04
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
30.6
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
30.56
<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
1.8
<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
1.81
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

MkII version (1982) has quarter berth aft.
GULFSTAR 40 (1984?) was based on this same hull but with a center cockpit and built for the charter trade.

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

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