Review of Neptunus 107

Neptunus 107 anno 1979.

Basic specs.

The Neptunus 107 is a motorboat designed by the Dutch maritime architect Willem de Vries Lentsch Jr.. The Neptunus 107 is built by the Dutch yard Jachtwerf Neptunus B.V..

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Hull

Both the hull and the deck is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season.

Interior

The interior is like most other boats made of teak. Teak has the advantage of being naturally very oily and therefore water-repellent, which is suitable on boats.
The boat is equipped with 2 cabins, 4 berths, a galley and toilet facility.

Cockpit

Cockpit of Neptunus 107 anno 1979. The galley is just below the steering wheel and you can also see a small glimpse of the front cabin.

Deck saloon of Neptunus 107. In the process of renovation.

Engine

The Neptunus 107 has been equipped with different engine alternatives.

Alternative 1:

The boat may be equipped with an inboard Volvo Penta B2 diesel engine at 75 hp (55 kW).

The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.

Alternative 2:

Neptunus 107 may be equipped with an inboard DAF diesel engine at 78 hp (58 kW). Cruise speed is 8.0 knots. Max speed is 15.0 knots.

Alternative 3:

The boat may be equipped with an inboard DAF diesel engine at 85 hp (63 kW).

The fuel tank, which is made of stainless steel, has a capacity of 310.0 liters (81 US gallons, 68 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.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Neptunus 107 is about 247 kg/cm, alternatively 1384 lbs/inch.
Meaning: if you load 247 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1384 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 Neptunus 107 is 3.10.

Compared with other similar motor boats it is more spacy than 50% of all other designs. It seems that the designer has chosen an average hull design.

Curiosities

Powerboat?

In Denmark, you are required to have achieved a 'powerboat driving license' in order to sail a powerboat.
In this context a boat is considered a powerboat if:

Danish definition of a powerboat

According to this definition this boat is not categorized as a Powerboat.
Though, if you install a motor of 117 kW (157 hp), then the boat will become a powerboat, and you will need a Danish 'powerboat driving license'

Maintenance

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.

Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.

Finally

We are always looking for new photos. If you can contribute with photos for Neptunus 107 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.