Review of CM 60

Basic specs.

The CM 60 is a large sailboat designed by the American maritime architect bureau Farr Yacht Design, Ltd. in the late nineties. The CM 60 is built by the American yard Carroll Marine Ltd..

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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.

Rig

The CM 60 is 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 gennaker or a spinnaker for optimal speed.

Keel

Fin keel

The CM 60 is equipped with a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a full keel.

The boat can only enter major marinas as the draft is about 3.60 - 3.70 meter (11.81 - 12.11 ft) dependent on the load. See immersion rate below.

Engine

The boat may be equipped with an inboard Yanmar 4JH2-THE diesel engine at 75 hp (55 kW). Calculated max speed is about 8.4 knots

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 CM 60 is 2.09, 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 9.7 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 CM 60 is about 529 kg/cm, alternatively 2966 lbs/inch.
Meaning: if you load 529 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 2966 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 CM 60 is 3.69.

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 CM 60 is 58%.

This ballast ratio shows a righting moment that is higher than 100% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly above average.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for CM 60 is 95 which categorizes this boat among 'ultra light racers'.

88% 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 CM 60 with ISO 8666 reference sail is 34.4, with a 135% genua the SA/D is 39.7.

Over- / underrigged

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 102m² (1097 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 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	63.3 m	(207.7 feet)	14 mm	(0.55 inch)
Jib/genoa halyard	63.3 m	(207.7 feet)	14 mm	(0.55 inch)
Spinnaker halyard	63.3 m	(207.7 feet)	14 mm	(0.55 inch)
Jib sheet	18.3 m	(60.1 feet)	16 mm	(5/8 inch)
Genoa sheet	18.3 m	(60.1 feet)	16 mm	(5/8 inch)
Mainsheet	45.8 m	(150.3 feet)	16 mm	(5/8 inch)
Spinnaker sheet	40.3 m	(132.2 feet)	16 mm	(5/8 inch)
Cunningham	8.9 m	(29.2 feet)	14 mm	(0.55 inch)
Kickingstrap	17.8 m	(58.3 feet)	14 mm	(0.55 inch)
Clew-outhaul	17.8 m	(58.3 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 CM 60 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.