Review of Neptunus 133

Basic specs.

The Neptunus 133 is a large motorboat designed in the late eighties. The Neptunus 133 is built by the Dutch yard Jachtwerf Neptunus B.V..

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Hull

The hull is made of fibreglass while the deck is made of die cast 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.
The boat is equipped with 0 cabins, 6-8 berths, a galley and toilet facility.

Keel

The boat can enter even shallow marinas as the draft is just about 1.10 - 1.20 meter (3.61 - 3.91 ft) dependent on the load. See immersion rate below.

Engine

Neptunus 133 is typically equipped with an inboard Volvo Penta engine at 306.0 hp (227 kW).

The transmission is a shaft drive.

The fuel tank which is made of stainless steel has a capacity of 1260.0 liters (332 US gallons, 277 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 133 is about 356 kg/cm, alternatively 1995 lbs/inch.
Meaning: if you load 356 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1995 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 133 is 3.33.

Compared with other similar motor boats it is slimmer than 54% of all other designs. It seems that the designer has chosen a slightly more speedy 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 categorized as a Powerboat.

Maintenance

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 Neptunus 133 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.