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Review of Nelson 37


Basic specs.

sail specifications
The Nelson 37 is a motorsailer designed by the maritime architect Odd Rembert Andersen in the early seventies.

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Interior
The boat is equipped with 4 cabins, 4 berths, a galley and toilet facility.

Keel
Keel
Keel of Nelson 37 anno 1973. Nelson 37 bygget i Danmark frem til 1975, dernæst opkøbt og omkonverteret af Nauticat til NC 38

Engine

The boat is typically equipped with an inboard Perkins engine at 72.0 hp (53 kW), which gives a max speed about 8.5 knots.

The fuel tank has a capacity of 600 liters (158 US gallons, 131 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 Nelson 37 is 1.75, indicating that this boat could - if evaluated by this formula alone - 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 7.4 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 Nelson 37 is about 210 kg/cm, alternatively 1179 lbs/inch.
Meaning: if you load 210 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1179 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 Nelson 37 is 31.5.

Low High 69% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 69% of all similar sailboat designs. This comfort value is just above average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Nelson 37 is 3.35.

Wide Slim 62% 0 50 100
Compared with other similar sailboats it is slimmer than 62% of all other designs. It seems that the designer has chosen a slightly more speedy hull design.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Nelson 37 is 264 which categorizes this boat among 'light crusers & offshore racers'.

Heavy Light 46% 0 50 100
46% of all similar sailboat designs are categorized as heavier. A heavy displacement combined with smaller water plane area has lower acceleration and is more comfortable.


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
UsageLengthDiameter
Jib sheet 11.4 m(37.4 feet)14 mm(0.55 inch)
Genoa sheet11.4 m(37.4 feet)14 mm(0.55 inch)
Mainsheet 28.5 m(93.5 feet)14 mm(0.55 inch)
Spinnaker sheet25.1 m(82.3 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.

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Finally

We are always looking for new photos. If you can contribute with photos for Nelson 37 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