Review of Pirelli J39

Basic specs.

The Pirelli J39 is a small rib. The Pirelli J39 is built by the Italian yard Sacs Tecnorib S.p.a..

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Engine

The boat may be equipped with a gasoline engine at 100 hp (74 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 Pirelli J39 is about 43 kg/cm, alternatively 244 lbs/inch.
Meaning: if you load 43 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 244 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 Pirelli J39 is 2.34.

Compared with other similar RIBs it is slimmer than 92% 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'.

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 Pirelli J39 it would be a great help.

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References

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.