Review of Princess 415

Basic specs.

The Princess 415 is a large motorboat designed in the mid eighties. The Princess 415 is built by the British yard Marine Projects.

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Hull

The hull is made of hand laid fibreglass while the deck is made of fibreglass. Generally, a hull made of hand laid fibreglass requires only a minimum of maintenance during the sailing season.

Engine

The Princess 415 has been equipped with different engine alternatives.

Alternative 1:

The boat may be equipped with dual inboard Volvo Penta TAMD 71B diesel engines at 380 hp (283 kW).

Alternative 2:

The boat may be equipped with dual inboard Volvo Penta TAMD 61 diesel engines at 306 hp (227 kW).

Alternative 3:

Princess 415 may be equipped with dual inboard Caterpillar 3208 diesel engines at 375 hp (279 kW).

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 415 is about 377 kg/cm, alternatively 2115 lbs/inch.
Meaning: if you load 377 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 2115 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 415 is 2.92.

Compared with other similar motor boats it is more spacy than 76% of all other designs. It seems that the designer has chosen a significantly 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.

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Finally

We are always looking for new photos. If you can contribute with photos for Princess 415 (1985) 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.