Review of Princess 40

Basic specs.

The Princess 40 is a large motorboat designed in the late nineties. The Princess 40 is built by the British yard Marine Projects (Plymouth) Limited.

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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 a galley, 487.0 liter fresh water capacity and toilet facility.

Engine

The Princess 40 has been equipped with different engine alternatives.

Alternative 1:

The boat may be equipped with dual inboard Volvo Penta TAMD 63P diesel engines at 370 hp (275 kW). Max speed is 32.0 knots.

Alternative 2:

Princess 40 may be equipped with dual inboard Volvo Penta TAMD 63L diesel engines at 318 hp (236 kW).

Alternative 3:

The boat may be equipped with dual inboard Volvo Penta KAMD 44P/EDC diesel engines at 260 hp (193 kW).

The fuel tank has a capacity of 1205.0 liters (318 US gallons, 265 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 Princess 40 is about 336 kg/cm, alternatively 1882 lbs/inch.
Meaning: if you load 336 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1882 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 Princess 40 is 3.13.

Compared with other similar motor boats it is more spacy than 62% of all other designs. It seems that the designer has chosen a slightly more spacy 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 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 Princess 40 (1997) 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.