gulfstar 50 sailboat data

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• Gulfstar 50

The Gulfstar 50 Sailboat Specs & Key Performance Indicators

The Gulfstar 50, a centre-cockpit ketch, was designed by Vincent Lazarra and built in the USA by Gulfstar Yachts.

Published Specification for the Gulfstar 50

Underwater Profile:  Fin keel with skeg-hung rudder

Hull Material:  GRP (Fibreglass)

Length Overall:  50'0" (15.2m)

Waterline Length:  39'8" (12.1m)

Beam:  13'8" (4.2m)

Draft:  5'6" (1.7m)

Rig Type:  Ketch

Displacement:  35,000lb (15,876kg)

Designer:  Vincent Lazarra

Builder:  Gulfstar Yachts (USA)

Year First Built:  1975

Year Last Built:  1980

Number Built:  250

Published Design Ratios for the Gulfstar 50

1. Sail Area/Displacement Ratio:  13.5

2. Ballast/Displacement Ratio:  30.0

3. Displacement/Length Ratio:  250

4. Comfort Ratio:  38.9

5. Capsize Screening Formula:   1.7

read more about these Key Performance Indicators...

Summary Analysis of the Design Ratios for the Gulfstar 50

1. A Sail Area/Displacement Ratio of 13.5 suggests that the Gulfstar 50 will need a stiff breeze to get her going. In light conditions, unless you've got plenty of time on your hands, motor-sailing may be the way to go.

2. A Ballast/Displacement Ratio of 30.0 means that a sailboat like the Gulfstar 50 is likely to benefit from being reefed early to keep her sailing upright in a moderate breeze.

3. A Displacement/Length Ratio of 250, tells us the Gulfstar 50 is a moderate displacement cruiser, which means she'll carry all your cruising gear without it having a dramatic effect on her performance. Most of today's sailboats intended for offshore cruising fall into this displacement category.

4. Ted Brewer's Comfort Ratio of 38.9 suggests that crew comfort of a Gulfstar 50 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 1.7 tells us that a Gulfstar 50 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0. 

Any Questions?

What, if any, alternative versions of the Gulfstar 50 were built?

There were two alternative versions of the Gulfstar 50: the Gulfstar 50 Sailmaster and the Gulfstar 50 TM. The Sailmaster was introduced in 1982 and featured a modified underbody with a longer keel, a taller rig, and a larger sail area. It was also more luxurious and expensive than the original version. Only 27 Sailmasters were built until 1985. The TM (for trunk model) was a rare variant that had a shorter cabin trunk and a flush deck forward of the mast.

Is the Gulfstar 50 still in production and, if not, when did production end and how many of these sailboats were built?

The Gulfstar 50 is not in production anymore. Production ended in 1980 after six years of building. A total of 172 hulls were built.

How did the sailing press review the Gulfstar 50?

The sailing press generally gave positive reviews to the Gulfstar 50, praising its interior space, joinery, performance, and value. For example, Sail magazine wrote in 1977: "The Gulfstar 50 is an impressive yacht by any standards...She is roomy, comfortable, well-finished, and surprisingly fast...She represents one of the best values in today's market for those who want both luxury and performance in a large yacht."

What do owners of the Gulfstar 50 have to say about their boats?

Owners of the Gulfstar 50 tend to be very satisfied with their boats, especially after making some upgrades and repairs. They appreciate the boat's spaciousness, comfort, seaworthiness, and classic beauty. Some common issues that owners have faced include hull blisters, corrosion of the mast step, leaking deck fittings, and separation of the rudder skeg.

What is the history of the builders of the Gulfstar 50 and is the company still in business?

The builders of the Gulfstar 50 were Gulfstar Yachts, founded in 1970 by Vince Lazzara, an industry pioneer who had previously worked at Aeromarine and Columbia Yachts. Gulfstar Yachts started out by building low-cost boats with maximum interior space, but later shifted to producing higher-quality performance cruisers, such as the Gulfstar 50. In the mid-1980s, Gulfstar Yachts merged with Viking Yachts, a powerboat manufacturer, and eventually stopped making sailboats. The company is still in business today as Viking Sport Cruisers.

How many people can sleep on board a Gulfstar 50?

The Gulfstar 50 can sleep up to eight people on board. The more popular layout features three staterooms: a master stateroom aft with an en suite head and shower and a large U-shaped double berth; a forward stateroom with a V-berth and access to a shared head; and a midships stateroom with upper and lower single berths. There is also a convertible dinette in the main saloon that can sleep two more people.

What sailplan and rig options, if any, are available for the Gulfstar 50?

The Gulfstar 50 was available as either a sloop or a ketch. The sloop rig had a single mast with a foretriangle area of 45.2m² and a mainsail area of 38m², for a total sail area of 83.2m². The ketch rig had two masts with a foretriangle area of 45.2m², a mainsail area of 38m², a mizzen area of 14m², and an optional mizzen staysail area of 12m², for a total sail area of up to 109.2m². There was also a tall sloop option with a higher mast and larger sail area.

What is the difference between the standard (or owner's) version and the charter version of the Gulfstar 50?

The standard or owner's version of the Gulfstar 50 had a more spacious and luxurious interior, with teak veneer cabinetry, a large navigation station, a wet bar, and a walk-in engine room. The charter version had a more simple and practical interior, with Formica cabinetry, a smaller navigation station, no wet bar, and no walk-in engine room. The charter version also had more berths and heads to accommodate more guests.

What keel options, if any, are available for the Gulfstar 50?

The Gulfstar 50 had only one keel option: a long fin keel with an encapsulated ballast of lead chunks embedded in concrete slurry. The keel had a draft of 1.7m and a ballast-to-displacement ratio of 30%.

What is the Gulfstar 50 like to sail?

The Gulfstar 50 is a stable and comfortable boat to sail, with good performance in light to moderate winds. It can reach hull speed of 9.3 knots easily and point well to windward. It is also easy to handle, with a balanced helm and a powerful rudder. In heavy winds, however, the boat may become overpowered and need reefing or changing sails. The boat is also not very maneuverable in tight spaces and may require a bow thruster or careful use of prop wash.

What is the average cost of a secondhand Gulfstar 50?

The average cost of a secondhand Gulfstar 50 varies depending on the condition, equipment, and location of the boat. According to YachtWorld.com, as of December 2021, the asking prices for Gulfstar 50s ranged from $80,000 to $190,892, with an average of $118,560.

What other sailboats have been created by the designer of the Gulfstar 50?

The designer of the Gulfstar 50 was Vince Lazzara, who also designed many other sailboats for Gulfstar Yachts, such as the Gulfstar 37, the Gulfstar 43, the Gulfstar 44, the Gulfstar 60, and the Gulfstar Sailmaster series. He also designed some powerboats for Viking Yachts after the merger with Gulfstar Yachts.

What was Vince Lazzara's design philosophy?

Vince Lazzara was a pioneer in the yacht industry who started his career as a chemical engineer and built the largest fiberglass yacht ever in 1955. He founded Gulfstar Yachts in Florida and produced sailboats and trawlers with high quality and design. He also experimented with composite materials and low glass-resin ratios to improve the performance and durability of his boats.

His son Dick Lazzara followed his footsteps and launched Lazzara Yachts in the early 1990s, together with his brother Brad. Dick is the president of Lazzara Yachts and the main designer of its innovative products. He is known for creating yachts that combine luxury, style, and performance, with features such as split-level designs, open galleys, infinite sight lines, and advanced engineering. He also strives to provide more customization and personalization for his clients.

Vince Lazzara's design philosophy can be summarized as follows:

"I always wanted to build a boat that was better than anything else on the market. I wanted to build a boat that was faster, stronger, more comfortable, more seaworthy, and more beautiful than anything else out there."

The above answers were drafted by sailboat-cruising.com using GPT-4 (OpenAI’s large-scale language-generation model) as a research assistant to develop source material; to the best of our knowledge,  we believe them to be accurate.

Other sailboats in the Gulfstar range include:

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Gulfstar 50 review: affordable three stateroom classic.

The Gulfstar 50 is one of Lazzara’s best designs. Lazzara previously was a partner at Columbia yachts who produced another well know 50-footer, the Columbia 50. The Gulfstar 50 is a lot of boat for under $200,000 these days and attracts a certain degree of interest. The combination of a 50 foot boat with a three stateroom layout for sometimes below $100,000 is one of those golden combination in a brokerage boat. There are always a large number of clients looking for a 50-foot boat for around $100,000. Gulfstar has a confusing reputation. Ask some people and they’ll lambast the builder for shoddy layup and bathtub designs. Ask others, and they’ll praise the skill and quality of Gulfstar. This inconsistency is a facet of the diametric divisions in Gulfstar’s history. For the first five years in 1970-1975, they built cheap, floating bathtubs. If you wanted a sailboat, they would step a mast. In the late 1970’s, Vince Lazzara jibed and produced high-quality, performance sailboats. These performance yachts include the 50 along with the 60 and 44.

First Impressions With her teak caprail, long fine lines, and just the right touches of chrome, she is a boat many a client has fallen in love and had to check the hard reality of their bank account. The cabin trunk is streamlined with not too much height. She has a slightly spoon, raked bow with a sweet sheer and lovely counter stern. It is a design that has proven time and still keeps a modern look with it’s classic teak touches. You find sloop and ketch rigs on these centercockpit cruisers.

Construction The 50 Gulfstar straddles the Gulfstar build lines. For instance, early on they used a star logo while later switching to a wreath shape. Some Gulfstar 50’s feature a star-wreath combination logo. In the early years, I have unconfirmed reports of iron ballast while later ones definitely have lead. This iron-lead choice is a primary division in quality. Lead is superior in density and corrosion resistance, but iron is less expensive. This change highlights the concerted effort of Gulfstar to improve the build quality. The tankage was set low in the bilge over the keel cavity so it is difficult to inspect the area. Another change was a switch from Formica to teak veneer interiors. They patented a special plywood for construction. You can see the quality with nicely radiused corners, cambered edges, and laminate. Gulfstar 50’s have dark teak interiors that rival the best workmanship of any manufacturer. The hull is solid glass. Because of the oil embargo, Gulfstar was experimenting lower than usual glass-resin ratios. While the learning curve had issues shown by the blister pox of all manufacturers during this era, essentially Gulfstar was right. Lazzara’s insistence on a low for the 50% glass-resin ratio is now the normal ratio for building yachts. Reports are that a few late model 50’s had balsa cored hulls. The decks are balsa cored and attached with the standard lip flange.

What to Look For Most of the 50 Gulfstars were Caribbean charter boats. You will see quite a difference between the two stratas of 50’s, and it’s a real difference in all the ways you can and cannot see. Another note is that these are becoming unlikely financing candidates. Banks prefer not to finance boats older than 25 years of age. And because of Gulfstar’s confusing reputation, banks will hesitate to finance the brand. Unless you have a Bristol survey and perfect credit, financing a Gulfstar 50 is unlikely.

On Deck and Down Below The 50 comes in both 2 and 3 staterooms designs. These may correlate to the Mark I and II versions though noone seems to know the difference. The three stateroom design is more attractive with a V-berth forward, starboardside bunk beds, and large aft stateroom. The two staterooms have an enlarged engine room and navigation station area. One couple I met mentioned how steep the companionway is as you come down. The freeboard leads to 6’6″ headroom albeit the cockpit sole lowers the portside walkthrough. You will see the cockpit sole lower deep into the walkthrough on most Gulfstars. Because the cockpit is sunken into the hull lines giving that low slung look, the walkthrough headroom is restricted to 5’6″. I am 6’0″ and really have to crouch down to pass through the walkway. A pair of overhead handles in the companionway-saloon would help for safety offshore.

Engine and Underway These have great Perkins engines originally. The access is from behind the companionway and also along the walkthrough. Some were surprisingly underpowered with a 65HP Perkins while others had a 85HP model. The fuel tank is in the bilge of fiberglass or stainless steel in front of the engine. The engine room has a cute little portholed door with the teak cambered top. Being a 35,000 pound displacement boat, she really can be a lot to handle for a newbie couple. Docking will be the biggest problem, and I would recommend a bow thruster which would run about $8,000 to ease the difficulty.

With a fin keel and skeg rudder, she has a modern underbody and will surprise you. One broker mentioned his experiences. “I owned a 57 Nautor Swan and a friend a 50 Gulfstar. One day it was really blowing, and nobody could stay out there except me and my friend on his 50 Gulfstar. With a Swan is saying something. And he was right with me the whole time. That’s when I realized these are great boats. I really like them.” The Gulfstar 50 is heavy displacement cruiser and can sail amongst the best.

Conclusion After producing the 50 in the late 1970’s and early 1980’s, Gulfstar moved on to motor sailors and powerboats again. In the very end, they produced charter boats like the Gulfstar 50 CSY (a wholly different design) with Formica interiors. The sons were powerboat guys and did not do well with Gulfstar. Gulfstar shutdown in the late 1980’s. They successfully moved on to found the megayacht company Lazzara Yachts in the Tampa Bay area. The 50 Gulfstar remains, perhaps, Vince Lazzara’s greatest legacy to the sailing world – the inspiration for the Stevens / Hylas 47. You will find these for between $75,000 and $150,000 in varying condition.

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Review of Gulfstar 50

Basic specs..

The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season.

The boat is equipped with 1325.0 liter fresh water capacity.

Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

What is Capsize Screening Formula (CSF)?

The capsize screening value for Gulfstar 50 is 1.68, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 8.6 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Gulfstar 50 is about 370 kg/cm, alternatively 2072 lbs/inch. Meaning: if you load 370 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 2072 lbs cargo on the boat it will sink 1 inch.

Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.

What is Motion Comfort Ratio (MCR)?

What is L/B (Length Beam Ratio)?

What is Displacement Length Ratio?

Maintenance

If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful.

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.

We are always looking for new photos. If you can contribute with photos for Gulfstar 50 (Vince S. Lazzara) it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us . Criticism helps us to improve.

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GULFSTAR 50: An Affordable Big Boat

Gulfstar Yachts was founded in 1970 by Vince Lazzara, an industry pioneer who in the early 1950s helped make a success of Aeromarine, one of the very first fiberglass boatbuilders. In the early 1960s he did the same at Columbia Yachts, which became the world’s biggest sailboat builder in its day. Early on Gulfstar emphasized low price and maximum interior space over build quality and sailing ability, but in the mid-1970s the company shifted gears and worked to deliver a more high-end product. The most notable manifestation of this was the Gulfstar 50, a large center-cockpit cruiser first introduced in 1975. The GS 50 was the best boat Gulfstar ever built and also the most popular, with 172 hulls launched during a six-year production run that ended in 1980. Designed by Lazzara himself, the GS 50 boasts superior interior joinery, generous accommodations, robust construction, and a well proportioned hull and rig. These days it is one of the best values on the brokerage market in a larger center-cockpit boat.

Though better built than most Gulfstars, the GS 50 is not without its faults. Construction is simple and straightforward, with a solid hull laminate composed of multiple layers of mat and woven roving. (Note, however, a few hulls may be cored with balsa.) The hull is stiffened, not with liners, but with full bulkheads and furniture components that are tabbed in place. The deck is balsa-cored, with a through-bolted joint glassed over from below. The full-length rudder skeg is also bolted in place. The ballast, which consists of lead chunks embedded in concrete slurry, is encapsulated within the long fin keel.

Problems over the years have included hull blisters, which normally are just cosmetic, but in some cases have involved saturated cavities surrounding the ballast. These must be drained and flushed before they are filled in. The mainmast step, an iron plate in the bilge directly over the keel, is subject to corrosion, while the mizzen step on ketch-rigged boats may have crushed the deck core beneath it. Leaking deck fixtures, hatches, and port windows are other common complaints. In some boats the bronze stern tube housing the rudderstock may eventually separate from the surrounding hull laminate and must then be rebonded in place. There have also been reports of loose tabs around bulkheads and sub-floor structures that also need rebonding. The good news is that many owners value their GS 50s enough that they are willing to make repairs. Well-maintained boats are not hard to find; boats in poor condition are priced accordingly and normally are worthy of reconstruction.

For most owners the boat’s most attractive feature is its interior. The more popular layout, originally developed for the charter trade, features three staterooms and works very well for families. The master stateroom aft with an en suite head and separate shower boasts an enormous U-shaped double berth with enough space for a couple to sleep together athwartship while in harbor or separately in lateral positions while at sea. The forward stateroom, which shares a head with the saloon, has a large V-berth that fills in to form a double, and the third stateroom, midship to starboard, has two single bunks with yet another small en suite head. The L-shaped galley runs down the walk-through alley under the center cockpit to port, with twin sinks close enough to the centerline to drain on either tack. The saloon has a dinette to port and a settee plus a pilot berth to starboard. In the two-stateroom layout, which is more appropriate for a cruising couple entertaining occasional guests, instead of the midship stateroom there is a fabulous wrap-around nav station and expanded engine space beneath the cockpit.

In the saloon looking aft. This is the “charter” layout, with an extra stateroom on the starboard side opposite the walk-through galley

The saloon looking forward. The dinette table, you’ll note, is not very large

The owner’s stateroom aft features an en suite head and a very large versatile U-shaped berth

In a seaway the GS 50 is very well mannered. Its forefoot has enough bite and its bilges are deep enough that it does not slam much in a chop. It is relatively narrow with a moderate hull form and does not gripe when sailing to weather. All tanks are below the floorboards, which keeps the center of gravity low, sweetens the motion, and also creates extra storage space under berths and settees.

The sail plan is not particularly large, in either the ketch or sloop configurations, and I would advise against a roller-furling mainsail if you value sailing performance. A number of GS 50s were fitted with early after-market behind-the-mast mainsail furlers and these in particular should be avoided or quickly replaced. Sheeting angles are not very narrow, as the mast spreaders are wide and the chainplates are set nearly all the way outboard. Most owners report the boat will not sail well to windward unless the apparent wind angle is 45 degrees or greater.

Still, the GS 50 is not exactly a slouch when it comes to speed, though it does like moderate to heavy weather better than the light stuff. It’s not hard to keep the boat moving at 7 knots or better under working sail if the wind is blowing over 12 knots; below that you’ll need to break out spinnakers and mizzen staysails to maintain good speed.

A well-maintained sloop rigged GS 50 flying an A-sail

If you like to motorsail, bear in mind the original engine on most GS 50s was a 62-hp Perkins diesel which, though reliable, is not quite powerful enough to push the boat hard into a head sea. Later on an 85-hp Perkins engine was offered as an option and this does a much better job of driving the boat to speed. Several boats now on the market have been repowered–turbo-charged Yanmar diesels seem to be a popular replacement engine–and these may command a significant premium.

The standard fuel capacity, 100 gallons, is a bit low for a boat this size, so if you plan to do some long-range cruising you may want to carry some jerry jugs on deck or expand capacity a bit. The fuel tank is quite low in the boat, which forces the engine’s fuel pump to work hard, so adding a day tank higher in the boat with an effective transfer link to the main tank would be an excellent upgrade. Many GS 50s were delivered new with Onan generators installed. These are notorious troublemakers (on one boat I once cruised aboard we referred to ours as Onan the Barbarian) and should probably be replaced sooner rather than later.

Specifications

LOA: 50’0″ LWL: 39’8″ Beam: 13’8″ Draft: 6’0″ Ballast: 10,500 lbs. Displacement: 35,000 lbs. Sail area -Sloop: 895 sq.ft. -Ketch: 963 sq.ft. Fuel: 100 gal. Water: 210 gal. D/L ratio: 250 SA/D ratio -Sloop: 13.35 -Ketch: 14.37 Comfort ratio: 38.56 Capsize screening: 1.67 Nominal hull speed: 9.3 knots Typical asking prices: $60K-220K

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Something wrong in your performance calcs. A SDL ratio of 13.35 would be slower than a heavy displacement boat, and this boat easily sails. Also your sf of sail area is way off.

@darrington: No, I don’t think there’s anything wrong. These specs here match those I find elsewhere, at SailboatData.com, for example, and other published sources. The displacement number, if anything, is low, as is often the case, which would skew the SA/D ratio higher than it would be otherwise. Do you have different numbers from somewhere else? If so, what are they, and where did you find them? Thanks for your interest! charlie

I was with the largest Gulfstar dealer for many years from 1978-88, and sold and commissioned many, I would argue the Gulfstar 44 designed by Cort Steck was the best cruising design they ever offered and was considered a breakthrough design at the time.

I will add that I think the old 37 was a great cruising boat and its later derivative the 39 Sailmaster was too. I would still be a candidate for either one with a refit for a great cruising boat under 40 ft. on a budget.

more photos and info with price please

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1978 Gulfstar 50

• Center Cockpit
• San Diego, CA, US

Yacht price :

Specifications

Descriptions.

1978 Gulfstar 50 Sailboat For Sale in San Diego

Looking for a large, center cockpit cruising boat?

Look no further!

The GS 50 was the best Gulfstar built, was the most popular - 172 hulls in a 6 year production run.

Robust construction and a well proportioned hull and rig, skeg hung rudder and fin keel.

SHE SAILS WELL!!

New Standing rigging 2011~~~Boat repainted 2012

We Respect Your Time! Please call Karin Phares to schedule your viewing to ensure availability. 

[email protected]

619-422-2595

Basic Information

Dimensions & weight, tank capacities, accommodations.

• View Option

Additional Specs, Equipment and Information:

Builder/designer.

There is ample storage, drawers and hanging lockers for the sailing couple and crew.

Opposite the starboard settee is a large "U" shaped seat with the dinette table between. An ethenol fireplace will provide the ambiance!

The navigation station is to starboard, opposite the galley and just off the companionway.

The "L" shaped galley is to port: deep stainless steel sinks with new true Induction electric two burner stovetop and a Cuisinart electric convection oven, large refrigerator/freezer

Lighting throughout the boat is new, as is the headliner. Cabin soles, refinished. The boat has been rewired.

• TECMA Thedford electric heads forward and aft
• true Induction electric two burner stove top (new)
• Cuisinart electric convection oven
• Double stainless steel sinks
• Isotherm 50 l hot water heater

Electronics

• Simrad AP24 autopilot
• Raymarine wind angle
• Raymarine depth
• Standard Horizon hand held VHF
• Danforth compass
• 30 Amp/125v shore power, 110v boat systems
• Pro-Mariner combination charger/inverter
• Magnum Energy float charger display with Magnum Sine charger
• West Marine 0-15 Amp battery charger
• Exide 34MDCORD sealed deep-cycle AGM battery (x2)
• Two house batteries
• Xantrex Link PRO battery monitor
• Breaker protected AC/DC electrical panel
• Sentry DC Amp meter
• Bariant 32 self tailing primaries (x2)
• Bariant 23 self tailing winch (for outhaul)
• Lewmar winch for in haul
• Bariant 21 for traveller
• Stoway in mast furling
• Harken roller furling headsail
• Stainless steel arch
• Lifesling overboard rescue system
• Horseshoe throwable ring
• Large lazarette on aft deck
• 45# CQR anchor (no chain or rode)
• Dodger, bimini and full enclosure

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• Sailboat Guide

Gulfstar 50 TM

Gulfstar 50 TM is a 50 ′ 0 ″ / 15.2 m monohull sailboat designed by Richard C. Lazzara and built by Gulfstar Yachts starting in 1977.

Rig and Sails

Auxilary power, accomodations, calculations.

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

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

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.

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.

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.

Ballast / Displacement * 100

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.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

• D: Displacement of the boat in pounds.
• LWL: Waterline length in feet

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.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

• D: Displacement of the boat in pounds
• LOA: Length overall in feet
• Beam: Width of boat at the widest point in feet

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.

CSV = Beam ÷ ³√(D / 64)

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Gulfstar 50 kth

The gulfstar 50 kth is a 50.0ft masthead ketch designed by lazarra and built in fiberglass since 1980..

The Gulfstar 50 kth is a moderate weight sailboat which is slightly under powered. It is reasonably stable / stiff and has an excellent righting capability if capsized. It is best suited as a bluewater cruising boat.

Gulfstar 50 kth for sale elsewhere on the web:

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> > Please support our sponsors and let them know you heard about their products on Cruisers Forums. 13-01-2021, 11:21   to Sailboat data, but only 'I' dimensions. Does anyone have definitive numbers? An alternative question may be, ' has anyone taken a 50 down the and under the bridges?' Cheers, Bruce. , Thread Tools Rate This Thread : Posting Rules post new threads post replies post attachments edit your posts is are code is are are are Similar Threads Thread Thread Starter Forum Replies Last Post Coops Flotsam & Sailing Miscellany 11 14-02-2014 13:26 NAV OpenCPN 14 25-06-2011 03:23 wizard-merlin OpenCPN 3 16-02-2011 03:34 FullCircle OpenCPN 3 28-06-2010 10:56 jklaubert Seamanship & Boat Handling 23 06-07-2007 04:38 No Threads to Display. - - - - - - - Privacy Guaranteed - your email is never shared with anyone, opt out any time. 283 IMAGES GULFSTAR 50 Gulfstar 50 GULFSTAR 50 SAILMASTER 1987 Gulfstar 50 Voilier Bateau à Vendre The Gulfstar 50 Sailboat 1983 Gulfstar 50 Sailmaster Sail New and Used Boats for Sale VIDEO Incredible Gulfstar Motoryacht Tour #boat #yacht #motoryacht #boatforsale Amazing boat fits in a box Gulfstar 47 Sailmaster- SOLD 1987 Gulfstar 49 Motor Yacht Gulfstar 47 Sailmaster 7 weeks later, we are back in the water!!!!!! COMMENTS GULFSTAR 50 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 ... Kelsall Sailing Performance (KSP): Another measure of relative speed potential of a boat. It takes into consideration "reported" sail area ... Gulfstar 50 The Gulfstar 50 is a 50.0ft masthead sloop designed by Lazarra and built in fiberglass by Gulfstar Yachts between 1975 and 1980. 172 units have been built. The Gulfstar 50 is a moderate weight sailboat which is under powered. It is reasonably stable / stiff and has an excellent righting capability if capsized. It is best suited as a bluewater ... The Gulfstar 50 Sailboat The builders of the Gulfstar 50 were Gulfstar Yachts, founded in 1970 by Vince Lazzara, an industry pioneer who had previously worked at Aeromarine and Columbia Yachts. Gulfstar Yachts started out by building low-cost boats with maximum interior space, but later shifted to producing higher-quality performance cruisers, such as the Gulfstar 50 ... Gulfstar 50 Review: Affordable Three Stateroom Classic The Gulfstar 50 is one of Lazzara's best designs. Lazzara previously was a partner at Columbia yachts who produced another well know 50-footer, the Columbia 50. The Gulfstar 50 is a lot of boat for under $200,000 these days and attracts a certain degree of interest. The combination of a 50 foot boat with a three stateroom layout for sometimes ... Gulfstar 50 Gulfstar 50 is a 50′ 0″ / 15.2 m monohull sailboat designed by Vince & Richard Lazarra and built by Gulfstar Yachts between 1975 and 1980. Great choice! Your favorites are temporarily saved for this session. ... Sometimes referred to as the GULFSTAR CSY 50 though it was never built specifically for or by CSY, most originally went into the ... Gulfstar 50 Sailmaster Gulfstar 50 Sailmaster is a 50′ 0″ / 15.2 m monohull sailboat designed by Vince & Richard Lazarra and built by Gulfstar Yachts between 1982 and 1985. Great choice! Your favorites are temporarily saved for this session. Sign in to save them permanently, access them on any device, and receive relevant alerts. ... Gulfstar 50 Sailmaster is a ... Review of Gulfstar 50 The Gulfstar 50 is equipped with a finn keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a long keel. The boat can enter most marinas as the draft is just about 1.68 - 1.78 meter (5.51 - 5.81 ft) dependent on the load. See immersion rate below. Engine. GULFSTAR 50 TM 40 to 50 indicates a heavy bluewater boat; over 50 indicates an extremely heavy bluewater boat. Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam^1.33), where displacement is expressed in pounds, and length is expressed in feet. Capsize Screening Formula (CSF): Designed to determine if a boat has blue water capability. GULFSTAR 50: An Affordable Big Boat Gulfstar Yachts was founded in 1970 by Vince Lazzara, an industry pioneer who in the early 1950s helped make a success of Aeromarine, one of the very first fiberglass boatbuilders. In the early 1960s he did the same at Columbia Yachts, which became the world's biggest sailboat builder in its day. Early on Gulfstar emphasized low price and maximum interior space over build quality and sailing ... Gulfstar Yachts Gulfstar Yachts. Founded by Richard Valdez and Vince Lazarra. (Most boats were designed by Vince Lazarra and his son Dick). The sailboat division was discontinued and the company was sold to Viking Yachts in 1987. HIN: GFS. Years in Business: 1970 - 1987. Sailboats Built By Gulfstar Yachts. (Dates indicate when boat was first built by any builder) 1977 Gulfstar 50 Sailboat with COI *Estimated APR, or Annual Percentage Rate, is the annual cost of the loan, which includes other charges and fees. Actual rate and term can vary depending on credit history, collateral type, age of collateral, loan amount, loan term, loan to value, vessel registration type (LLC/Trust), state of residency and other criteria. 1978 Gulfstar 50 Sailboat For Sale Descriptions. 1978 Gulfstar 50 Sailboat For Sale in San Diego. Looking for a large, center cockpit cruising boat? Look no further! The GS 50 was the best Gulfstar built, was the most popular - 172 hulls in a 6 year production run. Robust construction and a well proportioned hull and rig, skeg hung rudder and fin keel. SHE SAILS WELL!! Gulfstar 50 tm The Gulfstar 50 tm is a 50.0ft masthead sloop designed by Richard C. Lazzara and built in fiberglass since 1977. The Gulfstar 50 tm is a moderate weight sailboat which is slightly under powered. It is not stiff and has an excellent righting capability if capsized. It is best suited as a bluewater cruising boat. 1977 Gulfstar 50 Sailboat with COI, Honolulu Hawaii Gulfstar 50 Sailboat with COI. $335,000 Honolulu, Hawaii. Close Map. Print; Facebook; Twitter; PREVIOUS NEXT-of -images Like this boat? Find out more. Hawaii Yacht Sales 1777 Ala Moana Blvd|Suite 118 . Honolulu, HI, 96815 United States 808-999-7274. View Seller Inventory Call Now 808-999-7274 Send Email Gulfstar 50 boats for sale Find Gulfstar 50 boats for sale in your area & across the world on YachtWorld. Offering the best selection of Gulfstar boats to choose from. Gulfstar 50 TM Gulfstar 50 TM is a 50′ 0″ / 15.2 m monohull sailboat designed by Richard C. Lazzara and built by Gulfstar Yachts starting in 1977. Great choice! Your favorites are temporarily saved for this session. Sign in to save them permanently, access them on any device, and receive relevant alerts. Gulfstar 50 kth The Gulfstar 50 kth is a 50.0ft masthead ketch designed by Lazarra and built in fiberglass since 1980. The Gulfstar 50 kth is a moderate weight sailboat which is slightly under powered. It is reasonably stable / stiff and has an excellent righting capability if capsized. It is best suited as a bluewater cruising boat. Gulfstar 50 mast heights Join Date: Mar 2020. Location: Hamble. Posts: 33. Gulfstar 50 mast heights. I found a thread here of similar name, but no useful information. References to Sailboat data, but only 'I' dimensions. Does anyone have definitive numbers? 1980 Gulfstar 50 Cruiser for sale This classic 1980 Gulfstar 50 has been built to last and refit to go. The perfect boat for anyone looking for a safe, reliable, live-a-board cruising vessel without having to break the bank. ... 2006 Cruisers Yachts 370 Express. US$147,500. League City, Texas. Broker Information. More from this Broker Visit Website. Monthly Payment. Total Loan ... GULFSTAR 50 SAILMASTER 40 to 50 indicates a heavy bluewater boat; over 50 indicates an extremely heavy bluewater boat. Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam^1.33), where displacement is expressed in pounds, and length is expressed in feet. Capsize Screening Formula (CSF): Designed to determine if a boat has blue water capability. Gulfstar 50 boats for sale View a wide selection of Gulfstar 50 boats for sale in your area, explore detailed information & find your next boat on boats.com. #everythingboats. Explore. Back. Explore View All. Overnight Cruising ... Gulfstar 50 Sailboat with COI . Honolulu, Hawaii. 1977. $335,000 Seller Hawaii Yacht Sales 13. gulfstar 50 Archives You must be logged in to create new topics. Log In. Username: Gulfstar boats for sale Gulfstar boats for sale on YachtWorld are available for a swath of prices from $19,900 on the moderate end of the spectrum, with costs up to $339,000 for the most luxurious yachts. What Gulfstar model is the best? Some of the best-known Gulfstar models presently listed include: 50, 36, 44, 44 Center Cockpit and 47 Sailmaster. catamaran gulet motorboat powerboat riverboat sailboat trimaran yacht