Review of Norlin 37 Mk II

Basic specs.

The Norlin 37 Mk II is a sailboat designed by the Swedish maritime architect Peter Norlin. The Norlin 37 Mk II is built by the Swedish yard Vikens Varv.

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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 cabins, 4 berths, a galley and toilet facility.
The headroom is above average

Rig

Rig of Norlin 37 Mk II.

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.

Engine

The boat is typically equipped with an inboard Volvo Penta diesel engine at 40.0 hp (29 kW), which gives a max speed about 6.6 knots.

The transmission is a Z-drive.

The fuel tank has a capacity of 90.0 liters (23 US gallons, 19 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 Norlin 37 Mk II is 1.95, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

EU classification

Norlin 37 Mk II holds one CE certification:

If less than 6 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.

Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 7.3 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 Norlin 37 Mk II is about 220 kg/cm, alternatively 1232 lbs/inch.
Meaning: if you load 220 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1232 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 Norlin 37 Mk II is 26.3.

Comparing this ratio with similar sailboats show that it is more comfortable than 42% of all similar sailboat designs. This comfort value is just below average.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Norlin 37 Mk II is 3.02.

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.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Norlin 37 Mk II is 256 which categorizes this boat among 'light crusers & offshore racers'.

50% of all similar sailboat designs are categorized as heavier. This boat has a precise average ratio between displacement and length!

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	11.0 m	(36.2 feet)	14 mm	(0.55 inch)
Genoa sheet	11.0 m	(36.2 feet)	14 mm	(0.55 inch)
Mainsheet	27.6 m	(90.5 feet)	14 mm	(0.55 inch)
Spinnaker sheet	24.3 m	(79.6 feet)	14 mm	(0.55 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

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References

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