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Review of Fun 25


Basic specs.

sail specifications
The Fun 25 is a small sailboat designed by the French maritime architect Michel Joubert together with Bernard Nivelt also from France. The Fun 25 is built by the French yard Jeanneau.

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Interior
The boat is equipped with 4 berths.

Keel

The boat can enter most marinas as the draft is just about 1.58 - 1.68 meter (5.18 - 5.48 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 Fun 25 is 2.39, indicating that this boat would not be accepted to participate in ocean races.


Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Fun 25 is about 112 kg/cm, alternatively 627 lbs/inch.
Meaning: if you load 112 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 627 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 Fun 25 is 2.98.

Wide Slim 58% 0 50 100
Compared with other similar sailboats it is slimmer than 58% of all other designs. It seems that the designer has chosen a slightly more speedy hull design.


Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Fun 25 is 34%.

Low High 31% 0 50 100
This ballast ratio shows a righting moment that is higher than 31% of all similar sailboat designs. A righting moment (ability to resist heeling) just below average.


SA/D (Sail Area Displacement ratio)

SA/D (Sail Area Displacement ratio)
Indicates how fast the boat is in light wind:
- Cruising Boats have ratios 10-15
- Cruiser-Racers have ratios 16-20
- Racers have ratios above 20
- High-Performance Racers have ratios above 24
Sail-area/displacement ratio (SA/D ratio): 24.40


RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Fun 25 is 85

Slow Fast 85% 0 50 100
The relative speed performance is 85 which means that a it is faster than 85% of all similar sailboat designs.


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 7.1 m(23.2 feet)10 mm(3/8 inch)
Genoa sheet7.1 m(23.2 feet)10 mm(3/8 inch)
Mainsheet 17.6 m(57.9 feet)10 mm(3/8 inch)
Spinnaker sheet15.5 m(51.0 feet)10 mm(3/8 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 Fun 25 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