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Review of Oyster 48 Lightwave


Basic specs.

sail specifications
The Oyster 48 Lightwave is a large sailboat designed by the American maritime architect Carl Schumacher in the late eighties. Only a few boats have been produced. The Oyster 48 Lightwave is built by the British yard Oyster Marine Ltd..

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Hull
Both the hull and the deck 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 0 cabins, 6 berths, a galley and toilet facility.

Rig
The boat equipped with a masthead rig. The advantage of a masthead rig is its simplicity and the fact that a given sail area - compared with a fractional rig - can be carried lower and thus with less heeling moment.

Keel
Keel
Keel of Oyster 48 Lightwave.

The Oyster 48 Lightwave is equipped with a fin keel. The fin keel is the most common keel and provides splendid manoeuvrability. The downside is that it has less directional stability than a long keel.

The boat can only enter major marinas as the draft is about 1.83 - 1.93 meter (6.00 - 6.30 ft) dependent on the load. See immersion rate below.


Engine

Oyster 48 Lightwave is typically equipped with an inboard diesel engine at 50.0 hp (37 kW).

The transmission is a shaft drive. A shaft drive will in the long run require less maintenence than other types of drive e.g. a sail drive.

The fuel tank has a capacity of 277.0 liters (73 US gallons, 60 imperial gallons).


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.

Theoretical Maximum Hull Speed

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.


Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Oyster 48 Lightwave is about 371 kg/cm, alternatively 2082 lbs/inch.
Meaning: if you load 371 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 2082 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 Oyster 48 Lightwave is 3.35.

Slim Wide 62% 0 50 100
Compared with other similar sailboats it is more spacy than 62% 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 Oyster 48 Lightwave is 41%.

Low High 76% 0 50 100
This ballast ratio shows a righting moment that is higher than 76% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly above average.


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 59m2 (635 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 masthead rig.

mainsail specifications headsail specifications

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
UsageLengthDiameter
Mainsail halyard 43.0 m(141.2 feet)14 mm(0.55 inch)
Jib/genoa halyard43.0 m(141.2 feet)14 mm(0.55 inch)
Spinnaker halyard43.0 m(141.2 feet)14 mm(0.55 inch)
Jib sheet 14.6 m(48.0 feet)16 mm(5/8 inch)
Genoa sheet14.6 m(48.0 feet)16 mm(5/8 inch)
Mainsheet 36.6 m(120.0 feet)16 mm(5/8 inch)
Spinnaker sheet32.2 m(105.6 feet)16 mm(5/8 inch)
Cunningham5.6 m(18.3 feet)14 mm(0.55 inch)
Kickingstrap11.2 m(36.6 feet)14 mm(0.55 inch)
Clew-outhaul11.2 m(36.6 feet)14 mm(0.55 inch)

Boat owner's ideas

This section shown boat owner's changes, improvements, etc. Here you might find inspiration for your boat.

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



Finally

We are always looking for new photos. If you can contribute with photos for Oyster 48 Lightwave 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