Review of Clubman 21

Basic specs.

The Clubman 21 also known as Joker 21 Clubman is a small rib. The Clubman 21 is built by the Italian yard Joker Boat S.r.l..

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Interior

The boat is equipped with 60.0 liter fresh water capacity.

Engine

The boat may be equipped with an outboard diesel engine at 850 hp (633 kW).

The fuel tank has a capacity of 110.0 liters (29 US gallons, 24 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.

EU classification

Clubman 21 holds a CE certification:

If less than 12 in on board the boat is by European Union certified as Class C. INSHORE:

Designed for voyages in coastal waters, large bays, estuaries, lakes and rivers where conditions up to, and including, wind force 6 (Beaufort scale) and significant wave heights up to, and including, 2 m may be experienced.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Clubman 21 is about 103 kg/cm, alternatively 581 lbs/inch.
Meaning: if you load 103 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 581 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 Clubman 21 is 2.48.

Compared with other similar RIBs it is slimmer than 62% of all other designs. It seems that the designer has chosen a slightly more speedy hull design.

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

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References

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