Review of Bertram 450 Convertible

Basic specs.

The Bertram 450 Convertible is a large motorboat. The Bertram 450 Convertible is built by the American yard Bertram.

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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 600.0 liter fresh water capacity.

Engine

The Bertram 450 Convertible has been equipped with different engine alternatives.

Alternative 1:

The boat may be equipped with dual inboard MAN V8 900 CR diesel engines at 900 hp (670 kW).

Alternative 2:

Bertram 450 Convertible may be equipped with dual inboard Caterpillar 3196 DITA 6L diesel engines at 1320 hp (983 kW).

The fuel tank has a capacity of 2400.0 liters (634 US gallons, 527 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 Bertram 450 Convertible is about 447 kg/cm, alternatively 2503 lbs/inch.
Meaning: if you load 447 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 2503 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 Bertram 450 Convertible is 3.24.

Compared with other similar motor boats it is more spacy than 69% 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.

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Finally

We are always looking for new photos. If you can contribute with photos for Bertram 450 Convertible 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.