Review of Farr 40

Basic specs.

The Farr 40 is a large sailboat designed by the maritime architect Bruce Farr in the late nineties. The Farr 40 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.

Keel

The Farr 40 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 long keel.

The boat can only enter major marinas as the draft is about 2.60 - 2.70 meter (8.53 - 8.83 ft) dependent on the load. See immersion rate below.

Engine

The boat is typically equipped with an inboard Yanmar 3GM30SD diesel engine.

The transmission is a saildrive.

The fuel tank which is made of aluminium has a capacity of 75.0 liters (19 US gallons, 16 imperial gallons).

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 Farr 40 is 2.39, 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 8.0 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 Farr 40 is about 290 kg/cm, alternatively 1625 lbs/inch.
Meaning: if you load 290 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1625 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.

Motion Comfort Ratio

What is Motion Comfort Ratio (MCR)?

The Motion Comfort Ratio for Farr 40 is 14.5.

Comparing this ratio with similar sailboats show that it is more comfortable than 2% of all similar sailboat designs. This is a comfort value significantly below average.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Farr 40 is 3.08.

Compared with other similar sailboats it is more spacy than 73% 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 Farr 40 is 46%.

This ballast ratio shows a righting moment that is higher than 85% 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 Farr 40 is 110 which categorizes this boat among 'ultra light racers'.

95% 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 Farr 40 with ISO 8666 reference sail is 30.6, with a 135% genua the SA/D is 35.3.

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

Over- / underrigged

The Farr 40 has more rig than 97% of all similar sailboats, which indicates that the boat is significantly overrigged.

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 53m² (570 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.

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	43.0 m	(141.2 feet)	12 mm	(1/2 inch)
Jib/genoa halyard	43.0 m	(141.2 feet)	12 mm	(1/2 inch)
Spinnaker halyard	43.0 m	(141.2 feet)	12 mm	(1/2 inch)
Jib sheet	12.4 m	(40.7 feet)	14 mm	(0.55 inch)
Genoa sheet	12.4 m	(40.7 feet)	14 mm	(0.55 inch)
Mainsheet	31.0 m	(101.8 feet)	14 mm	(0.55 inch)
Spinnaker sheet	27.3 m	(89.6 feet)	14 mm	(0.55 inch)
Cunningham	5.9 m	(19.4 feet)	12 mm	(1/2 inch)
Kickingstrap	11.8 m	(38.7 feet)	12 mm	(1/2 inch)
Clew-outhaul	11.8 m	(38.7 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 Farr 40 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.