Review of Asso 99

Basic specs.

The Asso 99 is a sailboat designed by the Italian maritime architect Ettore Santarelli in the early eighties. A few hundred boats have been produced.

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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. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.

Rig

The boat equipped with a fractional rig. A fractional rig has smaller headsails which make tacking easier, which is an advantage for cruisers and racers, of course. The downside is that having the wind from behind often requires a genaker or a spinnaker for optimal speed.

Keel

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 Asso 99 is 2.87, 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 Asso 99 is about 196 kg/cm, alternatively 1098 lbs/inch.
Meaning: if you load 196 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1098 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 Asso 99 is 3.39.

Compared with other similar sailboats it is slimmer than 66% of all other designs. It seems that the designer has chosen a slightly more speedy hull design.

SA/D (Sail Area Displacement ratio)

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

The SA/D for Asso 99 with ISO 8666 reference sail is 39.8, with a 135% genua the SA/D is 45.9.

The SA/D ratio indicates that it is faster than 100% of all similar sailboat designs in light wind.

Maintenance

Rig

Dimensions of sail for fractional rig.

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**
Usage	Length		Diameter
Mainsail halyard	29.4 m	(96.5 feet)	10 mm	(3/8 inch)
Jib/genoa halyard	29.4 m	(96.5 feet)	10 mm	(3/8 inch)
Spinnaker halyard	29.4 m	(96.5 feet)	10 mm	(3/8 inch)
Jib sheet	10.0 m	(32.7 feet)	12 mm	(1/2 inch)
Genoa sheet	10.0 m	(32.7 feet)	12 mm	(1/2 inch)
Mainsheet	24.9 m	(81.7 feet)	12 mm	(1/2 inch)
Spinnaker sheet	21.9 m	(71.9 feet)	12 mm	(1/2 inch)
Cunningham	4.2 m	(13.6 feet)	10 mm	(3/8 inch)
Kickingstrap	8.3 m	(27.2 feet)	10 mm	(3/8 inch)
Clew-outhaul	8.3 m	(27.2 feet)	10 mm	(3/8 inch)

Boat owner's ideas

This section is reserved boat owner's changes, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

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Finally

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If you have any comments to the review, improvement suggestions, or the like, feel free to contact us. Criticism helps us to improve.

References

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.