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Review of Sly 42 Fun


Basic specs.

sail specifications
The Sly 42 Fun is a large sailboat designed by the Italian maritime architect bureau Lostuzzi Yacht Design S.n.c. together with Stefano Pastrovich from Monaco.

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Hull

The hull is a double hull which improves the indoor climate. Especially when the water is colder than the air in the cabin, then the double hull insulates against cold water and reduce the condense water in the cabin.


Interior

The boat is equipped with 4 berths and 270.0 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.

Stability and Safety

What is Capsize Screening Formula (CSF)?

The capsize screening value for Sly 42 Fun is 2.06, indicating that this boat would not 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 8.1 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 Sly 42 Fun is about 283 kg/cm, alternatively 1589 lbs/inch.
Meaning: if you load 283 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1589 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.

Motion Comfort Ratio

What is Motion Comfort Ratio (MCR)?

The Motion Comfort Ratio for Sly 42 Fun is 19.7.

Low High 8% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 8% of all similar sailboat designs. This is a comfort value significantly below average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Sly 42 Fun is 3.37.

Wide Slim 54% 0 50 100
Compared with other similar sailboats it is slimmer than 54% of all other designs. It seems that the designer has chosen a slightly more speedy hull design.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Sly 42 Fun is 128 which categorizes this boat among 'ultra light racers'.

Heavy Light 92% 0 50 100
92% of all similar sailboat designs are categorized as heavier. A light displacement requires less sailarea and has higher accellerations.


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 12.8 m(42.0 feet)14 mm(0.55 inch)
Genoa sheet 12.8 m(42.0 feet)14 mm(0.55 inch)
Mainsheet 32.0 m(105.0 feet)14 mm(0.55 inch)
Spinnaker sheet28.2 m(92.4 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.

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Finally

We are always looking for new photos. If you can contribute with photos for Sly 42 Fun 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