Review of Najad 380

Basic specs.

The Najad 380 is a sailboat designed by the German maritime architect bureau judel / vrolijk & co - engineering GmbH.

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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 6 berths.

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

The Najad 380 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 1.95 - 2.05 meter (6.40 - 6.70 ft) dependent on the load. See immersion rate below.

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 Najad 380 is 1.82, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

EU classification

Najad 380 holds one CE certification:

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.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Najad 380 is about 282 kg/cm, alternatively 1581 lbs/inch.
Meaning: if you load 282 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1581 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 Najad 380 is 3.16.

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 Najad 380 is 34%.

This ballast ratio shows a righting moment that is higher than 21% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly below average.

SA/D (Sail Area Displacement ratio)

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

The SA/D for Najad 380 with ISO 8666 reference sail is 15.9, with a 135% genua the SA/D is 18.7.

The SA/D ratio indicates that it is faster than 34% of all similar sailboat designs in light wind.

Over- / underrigged

The Najad 380 has more rig than 50% of all similar sailboats, which indicates that this rig is spot on average!

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	36.1 m	(118.4 feet)	12 mm	(1/2 inch)
Jib/genoa halyard	36.1 m	(118.4 feet)	12 mm	(1/2 inch)
Spinnaker halyard	36.1 m	(118.4 feet)	12 mm	(1/2 inch)
Jib sheet	11.6 m	(37.9 feet)	14 mm	(0.55 inch)
Genoa sheet	11.6 m	(37.9 feet)	14 mm	(0.55 inch)
Mainsheet	28.9 m	(94.7 feet)	14 mm	(0.55 inch)
Spinnaker sheet	25.4 m	(83.4 feet)	14 mm	(0.55 inch)
Cunningham	4.7 m	(15.3 feet)	12 mm	(1/2 inch)
Kickingstrap	9.3 m	(30.5 feet)	12 mm	(1/2 inch)
Clew-outhaul	9.3 m	(30.5 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.

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Finally

We are always looking for new photos. If you can contribute with photos for Najad 380 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.