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Review of Dynamique 58


Basic specs.

sail specifications
The Dynamique 58 is a large sailboat designed by the maritime architect bureau Joubert / Nivelt in the late eighties. The Dynamique 58 is built by the French yard Dynamique.

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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.


Keel

Fin keel

The Dynamique 58 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 2.49 - 2.59 meter (8.17 - 8.47 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 Dynamique 58 is 1.77, 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 9.3 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 Dynamique 58 is about 472 kg/cm, alternatively 2647 lbs/inch.
Meaning: if you load 472 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 2647 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 Dynamique 58 is 3.65.

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 Dynamique 58 is 190 which categorizes this boat among 'light racers'.

Heavy Light 54% 0 50 100
54% of all similar sailboat designs are categorized as heavier. A light displacement requires less sailarea and has higher accellerations.


SA/D (Sail Area Displacement ratio)

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

The SA/D for Dynamique 58 with ISO 8666 reference sail is 16.7, with a 135% genua the SA/D is 20.2.


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 80m2 (861 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.

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 46.3 m(152.0 feet)14 mm(0.55 inch)
Jib/genoa halyard46.3 m(152.0 feet)14 mm(0.55 inch)
Spinnaker halyard46.3 m(152.0 feet)14 mm(0.55 inch)
Jib sheet 17.7 m(58.0 feet)16 mm(5/8 inch)
Genoa sheet17.7 m(58.0 feet)16 mm(5/8 inch)
Mainsheet 44.2 m(145.0 feet)16 mm(5/8 inch)
Spinnaker sheet38.9 m(127.6 feet)16 mm(5/8 inch)
Cunningham5.7 m(18.8 feet)14 mm(0.55 inch)
Kickingstrap11.5 m(37.7 feet)14 mm(0.55 inch)
Clew-outhaul11.5 m(37.7 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 Dynamique 58 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