Review of Gulfstar 54

Basic specs.

The Gulfstar 54 is a large sailboat designed by the maritime architect Richard C. Lazzara in the mid eighties. Only a few boats have been produced. The Gulfstar 54 is built by the American yard Gulfstar Inc.

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Hull

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

Interior

The boat is equipped with 1011.0 liter fresh water capacity.

Rig

The Gulfstar 54 is equipped with a ketch rig. A ketch rig is generally considered easier to handle, because the sails are smaller, and because it can sail on most points to the wind with one sail completely taken down for repair or while reefing. The sail configuration of a ketch allows for better comfort and stability when sailing downwind or on a broad reach.

Keel

Fin keel

The Gulfstar 54 is equipped with a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a full keel.

The keel is made of lead. Compared with iron, lead has the advantage of being 44% heavier, which allows a smaller keel and hence less water resistance and higher speed.

The boat can enter most marinas as the draft is just about 1.50 - 1.60 meter (4.92 - 5.22 ft) dependent on the load. See immersion rate below.

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.

Stability and Safety

What is Capsize Screening Formula (CSF)?

The capsize screening value for Gulfstar 54 is 1.71, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 8.9 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.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Gulfstar 54 is about 429 kg/cm, alternatively 2405 lbs/inch.
Meaning: if you load 429 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 2405 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.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Gulfstar 54 is 3.46.

Compared with other similar sailboats it is more spacy than 66% of all other designs. It seems that the designer has chosen a slightly more spacy hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Gulfstar 54 is 26%.

This ballast ratio shows a righting moment that is higher than 8% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly below average.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Gulfstar 54 is 265 which categorizes this boat among 'light crusers & offshore racers'.

27% of all similar sailboat designs are categorized as heavier. A heavy displacement combined with smaller water plane area has lower acceleration and is more comfortable.

SA/D (Sail Area Displacement ratio)

What is SA/D (Sail Area Displacement ratio)?

The SA/D for Gulfstar 54 with ISO 8666 reference sail is 9.9, with a 135% genua the SA/D is 11.7.

The SA/D ratio indicates that it is faster than 1% of all similar sailboat designs in light wind.

Over- / underrigged

Maintenance

Bottom Paint

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 63m² (678 ft²).
Based on this, your favourite maritime shop can tell you the quantity you need.

Note: If you use a paint roller you will need more paint than if you use a paintbrush.

Rig

Dimensions of sail for ketch rig.

Are your sails worn out? You might find your next sail here: Sails for Sale

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.

**Guiding dimensions of running rig**
Usage	Length		Diameter
Mainsail halyard	32.1 m	(105.5 feet)	14 mm	(0.55 inch)
Jib/genoa halyard	32.1 m	(105.5 feet)	14 mm	(0.55 inch)
Spinnaker halyard	32.1 m	(105.5 feet)	14 mm	(0.55 inch)
Jib sheet	16.6 m	(54.5 feet)	16 mm	(5/8 inch)
Genoa sheet	16.6 m	(54.5 feet)	16 mm	(5/8 inch)
Mainsheet	41.5 m	(136.2 feet)	16 mm	(5/8 inch)
Spinnaker sheet	36.5 m	(119.9 feet)	16 mm	(5/8 inch)
Cunningham	6.1 m	(20.0 feet)	14 mm	(0.55 inch)
Kickingstrap	12.2 m	(40.0 feet)	14 mm	(0.55 inch)
Clew-outhaul	12.2 m	(40.0 feet)	14 mm	(0.55 inch)

Boat owner's ideas

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.

Finally

We are always looking for new photos. If you can contribute with photos for Gulfstar 54 Sailcruiser 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.

References

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.