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Review of Swan 431 Racing


Swan 431 Racing
Swan 431 Racing anno 1978. Late into the water , Finnish summer.

Basic specs.

sail specifications
The Swan 431 Racing is a large sailboat designed by the American maritime architect bureau Sparkman & Stephens in the mid seventies. Only a few boats have been produced. The Swan 431 Racing is built by the Finnish yard OY Nautor AB.

Looking for a new boat? Find a Swan 431 Racing or similar boat for sale

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

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 7.8 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.


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.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Swan 431 Racing is 310 which categorizes this boat among 'medium weight cruisers'.

Heavy Light 18% 0 50 100
18% 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.


Maintenance

Rig

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
Jib sheet 13.1 m(43.0 feet)16 mm(5/8 inch)
Genoa sheet 13.1 m(43.0 feet)16 mm(5/8 inch)
Mainsheet 32.8 m(107.5 feet)16 mm(5/8 inch)
Spinnaker sheet28.8 m(94.6 feet)16 mm(5/8 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 Swan 431 Racing 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