Review of Comet 910

Comet 910 anno 1976. Comet 910 from Comar (Italie), solid and fast gfk sailing boat

Basic specs.

The Comet 910 is a sailboat designed by the French maritime architect bureau Groupe Finot in the early seventies. Several hundred boats have been produced. The Comet 910 is built by the Italian yard Comar Yachts.

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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.

Interior

The boat is equipped with 6 berths.

Keel

The keel is made of iron. Many people prefer lead keel in favour of iron. The main argument is that lead is much heavier than iron and a lead keel can therefore be made smaller which again result in less wet surface, i.e. less drag. In fact iron is quite heavy, just 30% less heavy than lead, so the advantage of a lead keel is often overstated.

The boat can enter most marinas as the draft is just about 1.70 - 1.80 meter (5.58 - 5.88 ft) dependent on the load. See immersion rate below.

Engine

Comet 910 is typically equipped with an inboard Volvo Penta diesel engine at 16.0 hp (11 kW).

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.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Comet 910 is about 186 kg/cm, alternatively 1044 lbs/inch.
Meaning: if you load 186 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1044 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 Comet 910 is 2.97.

Compared with other similar sailboats it is more spacy than 62% of all other designs. It seems that the designer has chosen a slightly more spacy hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Comet 910 is 32%.

This ballast ratio shows a righting moment that is higher than 10% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly below average.

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**
Usage	Length		Diameter
Jib sheet	9.1 m	(29.9 feet)	12 mm	(1/2 inch)
Genoa sheet	9.1 m	(29.9 feet)	12 mm	(1/2 inch)
Mainsheet	22.8 m	(74.6 feet)	12 mm	(1/2 inch)
Spinnaker sheet	20.0 m	(65.7 feet)	12 mm	(1/2 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 Comet 910 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

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