Review of Fountain 47 Lightning

Basic specs.

The Fountain 47 Lightning is a large motorboat.

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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 2 berths.

Engine

The Fountain 47 Lightning has been equipped with different engine alternatives.

Alternative 1:

The boat may be equipped with three inboard Yanmar 6LP-Stze diesel engines at 900 hp (670 kW). Max speed is 52.0 knots.

Alternative 2:

Fountain 47 Lightning may be equipped with dual inboard Mercury 700 SCI engines at 1400 hp (1043 kW). The speed is 76.0 knots.

The transmission is a Z-drive aka sterndrive.

Alternative 3:

The boat may be equipped with three inboard MerCruiser Bravo engines at 1575 hp (1173 kW). Max speed is 70.0 knots.

Alternative 4:

The boat may be equipped with three inboard MerCruiser 700 SCI gasoline engines at 2100 hp (1564 kW).

The fuel tank has a capacity of 1287.0 liters (339 US gallons, 283 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 Fountain 47 Lightning is about 264 kg/cm, alternatively 1480 lbs/inch.
Meaning: if you load 264 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1480 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 Fountain 47 Lightning is 5.26.

Compared with other similar motor boats it is slimmer than 100% of all other designs. It seems that the designer has chosen a significantly more speedy hull design. This type of design is also referred to as 'needle'.

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.
Further, having a maximum speed of 52.0knots, the boat is categorized as a High Performance 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 Fountain 47 Lightning 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.