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1975 Gulfstar 50

Listed
Expired
$125,900 USD

Seller's Description

Over the last 10 years this Gulfstar has had a major refit!! Over $100,000 was spent and hundreds of hours of love were poured into her refit by her senior/owner shipwright.

Way too much to list here but I will make a brief listing of what comes to mind.

Brand new Volvo 75 hp turbo diesel now has 700 hours. Including new Prop, Prop shaft etc.

Brand new 7.5 KW Westerbeke diesel generator.

The entire engine room was gutted painted, insulated and all filters through hulls, plumbing, heads, tanks were replaced.

New ultra leather upholstery throughout.

All standing rigging replaced and some running rigging is new. The boat has hardly been sail since because the previous owner wasnt really a sailor.

New Corian countertops, new convection/microwave oven. New induction stove top, two refrigerators (with freezers) side by side that are high and easy to get in and out of, plus a large separate deep freeze. Even a new built-in dishwasher!!!

New LED lighting throughout!!

New Splendide washer dryer combo.

Six gel cell battery house bank. Freedom Xantrex 2500 watt inverter and 150 watt battery charger.

New solid teak floors throughout, new cabinetry throughout with built-in switched lighting.

Two new Bowmar hatches.

New Vetus bowthruster.

Two new air conditioners front and back.

Raytheon chart plotter with radar, AIS transmitter and auto pilot.

New hardtop and canvas for center cockpit. Canvas and isinglass are in excellent condition.

This is just a short list of things that have been replaced on this boat in the last 10 years. That said, the hull and decks are original and could use freshening up and shes due for bottom paint

Equipment: See above

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Specs

Designer
Vince & Richard Lazarra
Builder
Gulfstar Yachts
Associations
?
# Built
172
Hull
Monohull
Keel
Fin
Rudder
Skeg
Construction
FG

Dimensions

Length Overall
50′ 0″ / 15.2 m
Waterline Length
39′ 7″ / 12.1 m
Beam
12′ 11″ / 4 m
Draft
6′ 0″ / 1.8 m
Displacement
35,000 lb / 15,876 kg
Ballast
10,500 lb / 4,763 kg

Rig and Sails

Type
Sloop
Reported Sail Area
896′² / 83.2 m²
Total Sail Area
895′² / 83.2 m²
Mainsail
Sail Area
409′² / 38 m²
P
43′ 0″ / 13.1 m
E
18′ 11″ / 5.8 m
Air Draft
?
Foresail
Sail Area
486′² / 45.2 m²
I
50′ 10″ / 15.5 m
J
19′ 1″ / 5.8 m
Forestay Length
54′ 4″ / 16.6 m

Auxilary Power

Make
Perkins
Model
4.154
HP
62
Fuel Type
Diesel
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
200 gal / 757 l
Holding Tank Capacity
?
Headroom
?
Cabins
2

Calculations

Hull Speed
9.3 kn
Classic: 8.44 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

9.34 knots
Classic formula: 8.44 knots
Sail Area/Displacement
13.4
<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.
13.4
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
30.0
<40: less stiff, less 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

30.0
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
250.4
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
250.38
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
38.5
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
38.51
<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
1.67
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

Available as a sloop or ketch. Sometimes referred to as the GULFSTAR CSY 50 though it was never built specifically for or by CSY, most originally went into the charter trade.
Ketch rig:
I: 50.90’ / 15.51m
J: 19.10’ / 5.82m
P: 43.08’ / 13.13m
E: 15.29’ / 4.66m
PY: 27.00’ / 8.23m
EY: 11.00’ / 3.35m
Sail Area (100% fore+main triangles): 963.94 ft2/89.55 m2
Tall sloop:
I: 55.00’ / 16.76m
J: 19.10’ / 5.82m
P: 47.50’ / 14.48m
E: 19.00’ / 5.79m
Sail Area (100% fore+main triangles): 976.50 ft2/90.72 m2

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

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