YachtDatabase.com

Review of AL 21 Custom


Basic specs.

sail specifications
The AL 21 Custom is a small motorboat.

Here we would have liked to show you nice photos of the AL 21 Custom.
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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. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.


Engine

The boat is typically equipped with an outboard engine at 300.0 hp (223 kW).

The fuel tank has a capacity of 250.0 liters (66 US gallons, 54 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

AL 21 Custom holds one CE certification:

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 AL 21 Custom is about 116 kg/cm, alternatively 651 lbs/inch.
Meaning: if you load 116 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 651 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 AL 21 Custom is 2.82.

Wide Slim 58% 0 50 100
Compared with other similar motor boats it is slimmer than 58% of all other designs. It seems that the designer has chosen a slightly more speedy 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:

Equation for Danish definition of a powerboat
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.

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 AL 21 Custom 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