Review of Sense 51

Basic specs.

The Sense 51 is a large sailboat designed by the French maritime architect bureau Berret-Racoupeau Yacht Design.

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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.

Interior

The boat is equipped with 2/3 berths.

Rig

The boat equipped with a masthead rig. The advantage of a masthead rig is its simplicity and the fact that a given sail area - compared with a fractional rig - can be carried lower and thus with less heeling moment.

Keel

The boat can only enter major marinas as the draft is about 2.20 - 2.30 meter (7.22 - 7.52 ft) dependent on the load. See immersion rate below.

Engine

Sense 51 is typically equipped with an inboard diesel engine at 80.0 hp (59 kW).

The transmission is a saildrive.

The fuel tank has a capacity of 415 liters (109 US gallons, 91 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 Sense 51 is 1.84, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

EU classification

Sense 51 holds three CE certifications:

If less than 10 in on board the boat is by European Union certified as Class A. OCEAN:

Designed for extended voyages where conditions may exceed wind force 8 (Beaufort scale) and significant wave heights of 4 m and above but excluding abnormal conditions, and vessels largely self-sufficient.

If less than 11 in on board the boat is by European Union certified as Class B. OFFSHORE:

Designed for offshore voyages where conditions up to, and including, wind force 8 (Beaufort scale) and significant wave heights up to, and including, 4 m may be experienced.

If less than 16 in on board the boat is by European Union certified as Class C. INSHORE:

Designed for voyages in coastal waters, large bays, estuaries, lakes and rivers where conditions up to, and including, wind force 6 (Beaufort scale) and significant wave heights up to, and including, 2 m may be experienced.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Sense 51 is about 519 kg/cm, alternatively 2908 lbs/inch.
Meaning: if you load 519 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 2908 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 Sense 51 is 3.08.

Compared with other similar sailboats it is more spacy than 90% of all other designs. It seems that the designer has chosen a significantly more spacy hull design.

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	15.0 m	(49.1 feet)	16 mm	(5/8 inch)
Genoa sheet	15.0 m	(49.1 feet)	16 mm	(5/8 inch)
Mainsheet	37.5 m	(122.9 feet)	16 mm	(5/8 inch)
Spinnaker sheet	33.0 m	(108.1 feet)	16 mm	(5/8 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

We are always looking for new photos. If you can contribute with photos for Sense 51 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.